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Observed 1:55 PM CDT at KSPW

Arnolds Park, IA weather

Sunny and 72°22°, 18°10° warmer than a typical Oct 24, jacket by 8 PM.

Today: low 46°8° (likely 46°8° to 50°10°), high 73°23° (likely 70°21° to 73°23°).

Forecasts agree

Now 72°22°

Sunny

Wind
13 mph20 km/h
From the west-southwest. 58–13 mph20 km/h through 2 AM
Dew point
52°11°
Comfortable · down to 43°6° by 11 PM
UV index
3Moderate
Moderate until 3 PM · peak 4
Pressure
30.18 inHg1022 hPa
Steady over the last 3 h

Next 2 hours

No precipitation expected in the next 2 hours.

Next 48 hours

Good hours for
  • Dry until 7 PM
  • Drizzle tonight 7 PM–1 AM (40%, 0.24 in6.1 mm)
  • Below 60°16° tonight after 7 PM
  • Rain tomorrow night from 1 AM (60%, 0.37 in9.4 mm)
  • Gusts to 27 mph43 km/h tomorrow night 1–5 AM
  1. This afternoonDown to 66°19° by 5 PM · rain chance 20% · Mostly cloudy
  2. TonightDown to 47°8° by 5 AM · Rain 7 PM–1 AM (40%)
  3. Tomorrow morningUp to 53°12° by 11 AM · rain chance 20% · Mostly cloudy
  4. Tomorrow afternoonNear 55°13° · Cloudy
  5. Tomorrow nightDown to 43°6° by 5 AM · Rain 1–6 AM (40%) · gusts to 27 mph43 km/h
  6. Monday morningUp to 49°9° by 11 AM · Rain all morning (60%)
Hourly forecast, next 48 hours, in the place's local time
HourConditionsTemperatureFeels likePrecipitationWindHumidityCloud coverUV index
Sat 2pMostly cloudy73°23° (likely 69°21° to 73°23°)73°23°10%10 mph16 km/h from W, gusts 15 mph23 km/h49%53%3
Sat 3pCloudy72°22° (likely 67°19° to 72°22°)72°22°10%10 mph16 km/h from WNW, gusts 11 mph18 km/h51%83%2
Sat 4pPartly sunny69°21° (likely 63°17° to 69°21°)69°21°20%10 mph16 km/h from NW, gusts 16 mph26 km/h55%76%1
Sat 5pCloudy66°19° (likely 57°14° to 66°19°)66°19°20%10 mph16 km/h from N, gusts 19 mph30 km/h54%93%0
Sat 6pShowers61°16° (likely 54°12° to 61°16°)61°16°20%10 mph16 km/h from N, gusts 20 mph32 km/h60%69%0
Sat 7pCloudy57°14° (likely 51°11° to 57°14°)57°14°30%, 0.04 in1 mm10 mph16 km/h from N, gusts 20 mph31 km/h67%99%0
Sat 8pCloudy54°12° (likely 49°9° to 54°12°)54°12°40%, 0.04 in1 mm10 mph16 km/h from N, gusts 19 mph31 km/h71%100%0
Sat 9pCloudy53°12° (likely 49°9° to 53°12°)53°12°30%, 0.04 in1 mm10 mph16 km/h from N, gusts 17 mph28 km/h71%100%0
Sat 10pDrizzle52°11° (likely 48°9° to 52°11°)52°11°20%, 0.04 in1 mm10 mph16 km/h from N, gusts 16 mph26 km/h74%100%0
Sat 11pCloudy51°11° (likely 47°8° to 51°11°)51°11°30%, 0.04 in1 mm10 mph16 km/h from N, gusts 17 mph27 km/h74%100%0
Sun 12aCloudy50°10° (likely 47°8° to 50°10°)47°8°20%, 0.04 in1 mm5 mph8 km/h from N, gusts 17 mph28 km/h77%96%0
Sun 1aCloudy50°10° (likely 47°8° to 51°11°)47°8°10%5 mph8 km/h from NNE, gusts 19 mph30 km/h77%98%0
Sun 2aCloudy49°9° (likely 47°8° to 50°10°)46°8°10%5 mph8 km/h from NNE, gusts 19 mph30 km/h77%89%0
Sun 3aCloudy48°9° (likely 46°8° to 50°10°)44°7°10%10 mph16 km/h from NNE, gusts 19 mph30 km/h80%91%0
Sun 4aCloudy48°9° (likely 46°8° to 50°10°)44°7°20%10 mph16 km/h from NNE, gusts 18 mph29 km/h77%98%0
Sun 5aCloudy47°8° (likely 46°8° to 49°9°)43°6°20%10 mph16 km/h from NNE, gusts 17 mph28 km/h79%87%0
Sun 6aShowers47°8° (likely 45°7° to 49°9°)43°6°20%10 mph16 km/h from NNE, gusts 17 mph27 km/h79%49%0
Sun 7aCloudy47°8° (likely 45°7° to 48°9°)43°6°20%10 mph16 km/h from NNE, gusts 19 mph30 km/h79%90%0
Sun 8aCloudy46°8° (likely 45°7° to 48°9°)42°6°10%10 mph16 km/h from NE, gusts 16 mph25 km/h83%72%0
Sun 9aCloudy48°9° (likely 46°8° to 49°9°)44°7°10%10 mph16 km/h from NE, gusts 20 mph33 km/h80%99%0
Sun 10aCloudy52°11° (likely 48°9° to 52°11°)52°11°10%10 mph16 km/h from NE, gusts 19 mph31 km/h71%100%0
Sun 11aDrizzle53°12° (likely 48°9° to 53°12°)53°12°5%10 mph16 km/h from NE, gusts 18 mph30 km/h66%98%0
Sun 12pDrizzle54°12° (likely 48°9° to 54°12°)54°12°5%10 mph16 km/h from NE, gusts 17 mph27 km/h64%95%1
Sun 1pCloudy56°13° (likely 48°9° to 56°13°)56°13°5%10 mph16 km/h from NE, gusts 17 mph28 km/h57%94%3
Sun 2pCloudy56°13° (likely 48°9° to 56°13°)56°13°5%10 mph16 km/h from NE, gusts 19 mph30 km/h57%94%3
Sun 3pCloudy56°13° (likely 49°9° to 57°14°)56°13°5%10 mph16 km/h from NE, gusts 20 mph33 km/h57%92%2
Sun 4pCloudy57°14° (likely 49°9° to 57°14°)57°14°5%10 mph16 km/h from NE, gusts 21 mph34 km/h53%73%2
Sun 5pCloudy56°13° (likely 48°9° to 56°13°)56°13°5%15 mph24 km/h from NE, gusts 23 mph37 km/h53%71%1
Sun 6pCloudy55°13° (likely 46°8° to 55°13°)55°13°5%10 mph16 km/h from NE, gusts 25 mph40 km/h53%68%0
Sun 7pCloudy52°11° (likely 45°7° to 52°11°)52°11°5%10 mph16 km/h from NE, gusts 24 mph39 km/h54%68%0
Sun 8pCloudy48°9° (likely 44°7° to 49°9°)43°6°5%10 mph16 km/h from NE, gusts 23 mph37 km/h63%71%0
Sun 9pCloudy47°8° (likely 44°7° to 49°9°)42°6°0%10 mph16 km/h from NE, gusts 24 mph38 km/h63%84%0
Sun 10pCloudy47°8° (likely 44°7° to 49°9°)42°6°0%10 mph16 km/h from NE, gusts 25 mph40 km/h63%90%0
Sun 11pCloudy46°8° (likely 44°7° to 49°9°)41°5°5%10 mph16 km/h from NE, gusts 25 mph40 km/h63%80%0
Mon 12aCloudy45°7° (likely 43°6° to 48°9°)40°4°5%10 mph16 km/h from NE, gusts 25 mph39 km/h65%93%0
Mon 1aDrizzle45°7° (likely 44°7° to 48°9°)39°4°40%, 0.03 in0.8 mm10 mph16 km/h from NE, gusts 27 mph44 km/h65%100%0
Mon 2aShowers44°7° (likely 43°6° to 47°8°)38°3°40%, 0.03 in0.8 mm10 mph16 km/h from NE, gusts 26 mph42 km/h68%100%0
Mon 3aCloudy44°7° (likely 43°6° to 47°8°)38°3°30%, 0.03 in0.8 mm10 mph16 km/h from NE, gusts 26 mph42 km/h70%100%0
Mon 4aRain44°7° (likely 43°6° to 47°8°)38°3°30%, 0.03 in0.8 mm10 mph16 km/h from NE, gusts 25 mph41 km/h70%100%0
Mon 5aRain43°6° (likely 43°6° to 46°8°)36°2°20%, 0.03 in0.8 mm15 mph24 km/h from NE, gusts 24 mph39 km/h76%100%0
Mon 6aRain43°6° (likely 43°6° to 46°8°)36°2°40%, 0.03 in0.8 mm15 mph24 km/h from ENE, gusts 23 mph37 km/h76%100%0
Mon 7aShowers43°6° (likely 43°6° to 46°8°)36°2°60%, 0.03 in0.8 mm15 mph24 km/h from ENE, gusts 25 mph40 km/h76%100%0
Mon 8aDrizzle42°6° (likely 42°6° to 47°8°)35°2°60%, 0.03 in0.8 mm15 mph24 km/h from ENE, gusts 24 mph38 km/h82%99%0
Mon 9aShowers44°7° (likely 43°6° to 48°9°)38°3°60%, 0.03 in0.8 mm15 mph24 km/h from ENE, gusts 22 mph36 km/h79%99%0
Mon 10aDrizzle47°8° (likely 43°6° to 49°9°)41°5°60%, 0.03 in0.8 mm15 mph24 km/h from ENE, gusts 24 mph38 km/h76%92%0
Mon 11aCloudy49°9° (likely 44°7° to 51°11°)44°7°60%, 0.03 in0.8 mm15 mph24 km/h from ENE, gusts 23 mph37 km/h74%94%0
Mon 12pCloudy51°11° (likely 44°7° to 54°12°)51°11°60%, 0.03 in0.8 mm15 mph24 km/h from E, gusts 19 mph31 km/h68%98%0
Mon 1pCloudy53°12° (likely 45°7° to 56°13°)53°12°40%, 0.01 in0.3 mm15 mph24 km/h from E, gusts 18 mph30 km/h64%95%1

Days ahead

Shaded: typical range for these dates (1991–2020)
  1. Today, Oct 24. Showers. High 73°23°, low 46°8°. Typical 55°13° / 35°2°. Rain 0.02 in0.5 mm, 20% chance. Forecasts agree.
    1. Afternoon

      noon–6 PM

      Partly sunny, 73°23°

      20% chance

    2. Evening

      6 PM–midnight

      Showers, 54°12°

      40% chance · 0.2 in5.1 mm

    3. Overnight

      midnight–6 AM

      Cloudy, 47°8°

      20% chance · 0.04 in1 mm

    Official NWS forecast

    Today: A slight chance of rain showers after 4pm. Mostly cloudy. High near 73, with temperatures falling to around 66 in the afternoon. Northwest wind around 10 mph. Chance of precipitation is 20%.

    Tonight: A chance of rain showers. Cloudy, with a low around 46. North wind 5 to 10 mph. Chance of precipitation is 40%. New rainfall amounts less than a tenth of an inch possible.

    Forecasts agreeIndependent forecasts are close; the range is narrow.

    High, likely
    70°21°–73°23°
    Low, likely
    46°8°–50°10°
    Typical high / low
    55°13° / 35°2°
    Wind
    18 mph28 km/h, gusts 30 mph48 km/h
    UV peak
    4
  2. Tomorrow, Oct 25. Mostly cloudy. High 57°14°, low 41°5°. Typical 54°12° / 34°1°. Dry. Forecasts differ.
    1. Morning

      6 AM–noon

      Cloudy, 46°8°

      Dry

    2. Afternoon

      noon–6 PM

      Cloudy, 57°14°

      Dry

    3. Evening

      6 PM–midnight

      Cloudy, 48°9°

      Dry

    4. Overnight

      midnight–6 AM

      Rain, 43°6°

      40% chance · 0.15 in3.8 mm

    Official NWS forecast

    Day: A slight chance of rain showers before 8am. Mostly cloudy, with a high near 57. Northeast wind 10 to 15 mph. Chance of precipitation is 20%.

    Night: A chance of rain showers after 1am. Mostly cloudy, with a low around 41. Northeast wind 10 to 15 mph. Chance of precipitation is 40%.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    49°9°–57°14°
    Low, likely
    41°5°–47°8°
    Typical high / low
    54°12° / 34°1°
    Wind
    15 mph24 km/h, gusts 29 mph47 km/h
    UV peak
    3
  3. Monday, Oct 26. Showers. High 57°14°, low 47°8°. Typical 54°12° / 34°1°. Rain 0.24 in6.1 mm, 60% chance. Forecasts differ.
    1. Morning

      6 AM–noon

      Rain, 42°6°

      60% chance · 0.18 in4.6 mm

    2. Afternoon

      noon–6 PM

      Cloudy, 54°12°

      60% chance · 0.04 in1.1 mm

    3. Evening

      6 PM–midnight

      Drizzle, 52°11°

      40% chance · 0.02 in0.6 mm

    4. Overnight

      midnight–6 AM

      Cloudy, 56°13°

      40% chance

    Official NWS forecast

    Day: Rain showers likely. Mostly cloudy, with a high near 57. East northeast wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 60%.

    Night: Rain showers likely. Mostly cloudy, with a low around 47. Southeast wind around 10 mph. Chance of precipitation is 60%.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    53°12°–59°15°
    Low, likely
    43°6°–47°8°
    Typical high / low
    54°12° / 34°1°
    Wind
    18 mph28 km/h, gusts 32 mph51 km/h
    UV peak
    3
  4. Tuesday, Oct 27. Drizzle. High 65°18°, low 50°10°. Typical 53°12° / 34°1°. Rain 0.05 in1.3 mm, 30% chance. Forecasts differ.
    1. Morning

      6 AM–noon

      Cloudy, 53°12°

      20% chance

    2. Afternoon

      noon–6 PM

      Cloudy, 66°19°

      Dry

    3. Evening

      6 PM–midnight

      Drizzle, 61°16°

      30% chance · 0.02 in0.4 mm

    4. Overnight

      midnight–6 AM

      Partly cloudy, 56°13°

      30% chance

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: A chance of rain showers before 7am. Partly sunny, with a high near 65. Chance of precipitation is 30%.

    Night: A chance of rain showers between 7pm and 1am. Mostly cloudy, with a low around 50. Chance of precipitation is 30%.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    62°17°–69°21°
    Low, likely
    49°9°–53°12°
    Typical high / low
    53°12° / 34°1°
    Wind
    18 mph29 km/h, gusts 31 mph50 km/h
    UV peak
    2
  5. Wednesday, Oct 28. Thunderstorms. High 68°20°, low 47°8°. Typical 52°11° / 33°1°. Storms 0.26 in6.6 mm, 30% chance. Forecasts differ.
    1. Morning

      6 AM–noon

      Sunny, 55°13°

      Dry

    2. Afternoon

      noon–6 PM

      Partly sunny, 67°19°

      Dry

    3. Evening

      6 PM–midnight

      Drizzle, 58°15°

      Dry

    4. Overnight

      midnight–6 AM

      Clear, 50°10°

      Dry

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: A slight chance of rain showers between 7am and 1pm, then a chance of showers and thunderstorms. Mostly sunny, with a high near 68. Chance of precipitation is 30%.

    Night: A chance of showers and thunderstorms before 1am. Partly cloudy, with a low around 47. Chance of precipitation is 30%.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    62°17°–69°21°
    Low, likely
    47°8°–53°12°
    Typical high / low
    52°11° / 33°1°
    Wind
    19 mph30 km/h, gusts 32 mph51 km/h
    UV peak
    4
  6. Thursday, Oct 29. Partly sunny. High 69°21°, low 52°11°. Typical 52°11° / 33°1°. Dry. Mostly agree. Best day outdoors this week.
    1. Morning

      6 AM–noon

      Sunny, 49°10°

      Dry

    2. Afternoon

      noon–6 PM

      Sunny, 65°18°

      Dry

    3. Evening

      6 PM–midnight

      Clear, 57°14°

      Dry

    4. Overnight

      midnight–6 AM

      Drizzle, 55°13°

      20% chance · 0.02 in0.4 mm

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: Mostly sunny, with a high near 69.

    Night: A chance of rain showers after 7pm. Partly cloudy, with a low around 52. Chance of precipitation is 30%.

    Mostly agreeIndependent forecasts are fairly close; small surprises are possible.

    Best day outdoors this week: the one dry, mild day the forecasts agree on (high 69°21°).

    High, likely
    64°18°–69°21°
    Low, likely
    43°6°–52°11°
    Typical high / low
    52°11° / 33°1°
    Wind
    15 mph24 km/h, gusts 28 mph45 km/h
    UV peak
    3
  7. Friday, Oct 30. Showers. High 71°22°, low 53°12°. Typical 51°11° / 32°0°. Rain 0.23 in5.8 mm, 30% chance. Forecasts differ.
    1. Morning

      6 AM–noon

      Drizzle, 59°15°

      20% chance · 0.07 in1.7 mm

    2. Afternoon

      noon–6 PM

      Drizzle, 71°22°

      30% chance · 0.03 in0.7 mm

    3. Evening

      6 PM–midnight

      Drizzle, 67°19°

      30% chance · 0.13 in3.2 mm

    4. Overnight

      midnight–6 AM

      Drizzle, 60°16°

      40% chance · 0.15 in3.7 mm

    Hours this far out come from computer models only.

    Official NWS forecast

    Day: A chance of rain showers. Partly sunny, with a high near 71. Chance of precipitation is 30%.

    Night: Rain showers likely. Mostly cloudy, with a low around 53. Chance of precipitation is 60%.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    68°20°–76°24°
    Low, likely
    50°10°–63°17°
    Typical high / low
    51°11° / 32°0°
    Wind
    21 mph34 km/h, gusts 36 mph57 km/h
    UV peak
    1
  8. Saturday, Oct 31. Drizzle. High 63°17°, low 57°14°. Typical 51°11° / 32°0°. Rain 0.42 in11 mm, 50% chance. Mostly agree.
    1. Morning

      6 AM–noon

      Cloudy, 60°16°

      40% chance · 0.03 in0.8 mm

    2. Afternoon

      noon–6 PM

      Drizzle, 65°18°

      50% chance · 0.06 in1.5 mm

    3. Evening

      6 PM–midnight

      Drizzle, 59°15°

      50% chance · 0.15 in3.9 mm

    4. Overnight

      midnight–6 AM

      Drizzle, 55°13°

      40% chance · 0.12 in2.9 mm

    Hours this far out come from computer models only.

    The National Weather Service writes about seven days ahead; this day is our model forecast only.

    Mostly agreeIndependent forecasts are fairly close; small surprises are possible.

    High, likely
    60°16°–66°19°
    Low, likely
    51°11°–60°16°
    Typical high / low
    51°11° / 32°0°
    Wind
    16 mph25 km/h, gusts 39 mph62 km/h
    UV peak
    2
  9. Sunday, Nov 1. Drizzle. High 58°14°, low 46°8°. Typical 50°10° / 31°−1°. Rain 0.17 in4.3 mm, 40% chance. Forecasts differ.
    1. Morning

      6 AM–noon

      Drizzle, 53°12°

      30% chance

    2. Afternoon

      noon–6 PM

      Drizzle, 53°11°

      20% chance · 0.01 in0.3 mm

    3. Evening

      6 PM–midnight

      Cloudy, 49°10°

      20% chance

    4. Overnight

      midnight–6 AM

      Drizzle, 44°7°

      Dry

    Hours this far out come from computer models only.

    The National Weather Service writes about seven days ahead; this day is our model forecast only.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    53°12°–65°18°
    Low, likely
    38°3°–58°14°
    Typical high / low
    50°10° / 31°−1°
    Wind
    20 mph32 km/h, gusts 37 mph60 km/h
    UV peak
    2
  10. Monday, Nov 2. Drizzle. High 54°12°, low 43°6°. Typical 50°10° / 31°−1°. Rain 0.09 in2.3 mm, 30% chance. Forecasts differ.
    1. Morning

      6 AM–noon

      Drizzle, 46°8°

      Dry

    2. Afternoon

      noon–6 PM

      Cloudy, 54°12°

      30% chance · 0.02 in0.5 mm

    3. Evening

      6 PM–midnight

      Cloudy, 51°11°

      30% chance · 0.02 in0.6 mm

    Hours this far out come from computer models only.

    The National Weather Service writes about seven days ahead; this day is our model forecast only.

    Forecasts differIndependent forecasts disagree; expect changes and plan for the range.

    High, likely
    48°9°–66°19°
    Low, likely
    32°0°–59°15°
    Typical high / low
    50°10° / 31°−1°
    Wind
    25 mph41 km/h, gusts 50 mph81 km/h
    UV peak
    2

The outlook

  1. Today

    Dry, high 73°, low 46°.

  2. Tomorrow

    Dry, high 57°, low 41°, cooling off.

  3. Monday

    56% chance of rain, high 57°, low 47°.

  4. Rest of week

    Highs 54–71°; chance of precipitation on Saturday, Sunday.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (FSD) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue
Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

West Okoboji Lake near Milford

2.9 mi
Below flood stage
Level
4.1 ft

Reading from Sat 12:45 PM · NWS gauge page

Spirit Lake near Orleans

7.6 mi
Below flood stage
Level
14.2 ft

Reading from Sat 12:15 PM · NWS gauge page

West Fork Des Moines River at Estherville

15 mi
Below flood stage
Level
2.3 ft
Flow
37 cfs

Reading from Sat 12:45 PM · NWS gauge page

Ocheyedan River near Spencer

17 mi
Below flood stage
Level
2.7 ft
Flow
135 cfs

Reading from Sat 12:45 PM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 81% less heating than a typical week.

This week 28Typical 152

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F
18
h below 17°F
0
h below 5°F
0

47, 17 and 5°F are the test points heat pumps are rated at. About 1 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 52°F).

Open the windows?

Today, 3:00 PM–4:00 PM

Good stretch to open the windows (air quality forecast not available for part of this window).

Is this typical?

Spirit Lake · official normals 1991–2020 · records 1893–2026

Oct 24, today vs a typical year

Today’s expected high is 18°10° warmer than typical.

Normal high / low
55°13° / 35°2°
Forecast high / low
73°23° / 46°8°
Record high
81°27° in 1897
Record low
16°−9° in 1896

Last 7 days vs normal

On average 13°7° warmer than normal (daily mean temperature).

  1. +1°SunOct 18
  2. +8°+4°MonOct 19
  3. +9°+5°TueOct 20
  4. +12°+7°WedOct 21
  5. +18°+10°ThuOct 22
  6. +22°+12°FriOct 23
  7. +20°+11°SatOct 24

Arnolds Park weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Sunrise 7:45 AM, sunset 6:23 PM.

Daylight
10 h 37 min
Losing 2 min 44 s a day; shortest Dec 21, 1 h 40 min less
Golden hour
5:43–6:40 PM
Morning 7:27–8:25 AM
Blue hour
6:40–6:52 PM
Morning 7:16–7:27 AM; first light 7:16 AM

Stars tonight? Poor

Clouds most of the night (about 90% cover).

Moon

Waxing gibbous

97% lit · growing

Today
sets 5:58 AM · rises 5:21 PM
Full moon
Oct 25
New moon
Nov 9
Looking west from Arnolds Park. A level horizon.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.