Observed 2:00 PM CDT at KMSN

Lake Koshkonong, WI weather

Sunny and 72°22°, 14°8° warmer than a typical Oct 24.

Forecasts agree

Now 72°22°

Sunny

Wind: 14 mph22 km/h; From the south. 58–14 mph22 km/h through 2 AM
Dew point: 46°8°; Comfortable
UV tomorrow: 3Moderate; Moderate 12–4 PM · peak 3
Air quality: 60Moderate; Main pollutant: PM2.5 (fine particles)
Pressure: 30.32 inHg1027 hPa; Falling · −0.06 inHg−2.0 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

High 71°22° today at 4 PM
Below 60°16° tonight after 9 PM
Low 52°11° tomorrow at 6 AM
Above 60°16° tomorrow by 10 AM

This afternoonNear 70°21° · Partly cloudy
TonightDown to 53°12° by 4 AM · Mostly cloudy
Tomorrow morningUp to 64°18° by 11 AM · Mostly cloudy
Tomorrow afternoonUp to 72°22° by 3 PM · Mostly cloudy
Tomorrow nightDown to 51°11° by 3 AM · Mostly cloudy
Monday morningUp to 59°15° by 11 AM · Cloudy

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 2p	Sunny	69°21° (likely 68°20° to 70°21°)	69°21°	0%	10 mph16 km/h from S, gusts 16 mph26 km/h	47%	30%	2
Sat 3p	Cloudy	70°21° (likely 68°20° to 70°21°)	70°21°	0%	10 mph16 km/h from S, gusts 16 mph26 km/h	46%	61%	2
Sat 4p	Cloudy	71°22° (likely 68°20° to 71°22°)	71°22°	0%	10 mph16 km/h from S, gusts 17 mph27 km/h	42%	60%	1
Sat 5p	Cloudy	70°21° (likely 65°18° to 70°21°)	70°21°	0%	10 mph16 km/h from S, gusts 18 mph29 km/h	44%	57%	0
Sat 6p	Mostly cloudy	66°19° (likely 62°17° to 66°19°)	66°19°	5%	10 mph16 km/h from S, gusts 15 mph23 km/h	50%	51%	0
Sat 7p	Mostly cloudy	63°17° (likely 60°16° to 63°17°)	63°17°	5%	10 mph16 km/h from S, gusts 14 mph23 km/h	58%	61%	0
Sat 8p	Partly cloudy	60°16° (likely 59°15° to 60°16°)	60°16°	5%	10 mph16 km/h from S, gusts 15 mph23 km/h	64%	57%	0
Sat 9p	Mostly clear	59°15° (likely 58°14° to 59°15°)	59°15°	5%	5 mph8 km/h from S, gusts 14 mph23 km/h	67%	30%	0
Sat 10p	Partly cloudy	58°14° (likely 57°14° to 59°15°)	58°14°	5%	10 mph16 km/h from S, gusts 13 mph22 km/h	69%	67%	0
Sat 11p	Partly cloudy	57°14° (likely 56°13° to 58°14°)	57°14°	5%	5 mph8 km/h from S, gusts 12 mph20 km/h	69%	53%	0
Sun 12a	Partly cloudy	56°13° (likely 55°13° to 57°14°)	56°13°	5%	5 mph8 km/h from S, gusts 12 mph20 km/h	72%	89%	0
Sun 1a	Cloudy	55°13° (likely 55°13° to 57°14°)	55°13°	5%	5 mph8 km/h from S, gusts 12 mph20 km/h	74%	80%	0
Sun 2a	Cloudy	54°12° (likely 54°12° to 57°14°)	54°12°	5%	5 mph8 km/h from S, gusts 13 mph21 km/h	74%	77%	0
Sun 3a	Cloudy	54°12° (likely 54°12° to 55°13°)	54°12°	5%	5 mph8 km/h from S, gusts 13 mph20 km/h	74%	79%	0
Sun 4a	Cloudy	53°12° (likely 53°12° to 54°12°)	53°12°	5%	5 mph8 km/h from S, gusts 13 mph21 km/h	77%	81%	0
Sun 5a	Cloudy	53°12° (likely 53°12° to 54°12°)	53°12°	5%	5 mph8 km/h from S, gusts 13 mph21 km/h	77%	81%	0
Sun 6a	Cloudy	52°11° (likely 52°11° to 53°12°)	52°11°	5%	5 mph8 km/h from S, gusts 13 mph21 km/h	77%	81%	0
Sun 7a	Cloudy	52°11° (likely 52°11° to 53°12°)	52°11°	5%	5 mph8 km/h from S, gusts 13 mph20 km/h	77%	80%	0
Sun 8a	Cloudy	54°12° (likely 52°11° to 54°12°)	54°12°	5%	5 mph8 km/h from S, gusts 12 mph20 km/h	74%	80%	0
Sun 9a	Cloudy	57°14° (likely 56°13° to 57°14°)	57°14°	5%	5 mph8 km/h from SW, gusts 13 mph20 km/h	72%	79%	1
Sun 10a	Partly sunny	61°16° (likely 59°15° to 61°16°)	61°16°	5%	5 mph8 km/h from SW, gusts 14 mph22 km/h	65%	75%	1
Sun 11a	Partly sunny	64°18° (likely 62°17° to 65°18°)	64°18°	5%	5 mph8 km/h from SW, gusts 14 mph23 km/h	60%	72%	2
Sun 12p	Cloudy	68°20° (likely 65°18° to 68°20°)	68°20°	5%	5 mph8 km/h from SW, gusts 14 mph23 km/h	53%	66%	3
Sun 1p	Cloudy	70°21° (likely 68°20° to 70°21°)	70°21°	5%	5 mph8 km/h from SW, gusts 12 mph19 km/h	51%	65%	3
Sun 2p	Cloudy	71°22° (likely 70°21° to 72°22°)	71°22°	5%	5 mph8 km/h from SW, gusts 11 mph18 km/h	49%	67%	3
Sun 3p	Partly sunny	72°22° (likely 70°21° to 73°23°)	72°22°	5%	5 mph8 km/h from SW, gusts 11 mph17 km/h	48%	75%	3
Sun 4p	Cloudy	72°22° (likely 70°21° to 73°23°)	72°22°	5%	5 mph8 km/h from SW, gusts 9 mph14 km/h	49%	78%	2
Sun 5p	Cloudy	70°21° (likely 68°20° to 71°22°)	70°21°	5%	5 mph8 km/h from SW, gusts 7 mph11 km/h	53%	77%	1
Sun 6p	Partly cloudy	66°19° (likely 63°17° to 68°20°)	66°19°	5%	5 mph8 km/h from S, gusts 5 mph7 km/h	61%	73%	0
Sun 7p	Partly cloudy	63°17° (likely 61°16° to 64°18°)	63°17°	0%	0 mph0 km/h, gusts 5 mph7 km/h	67%	71%	0
Sun 8p	Partly cloudy	59°15° (likely 59°15° to 61°16°)	59°15°	0%	0 mph0 km/h, gusts 9 mph14 km/h	75%	73%	0
Sun 9p	Cloudy	58°14° (likely 58°14° to 59°15°)	58°14°	0%	0 mph0 km/h, gusts 9 mph14 km/h	77%	76%	0
Sun 10p	Cloudy	57°14° (likely 56°13° to 58°14°)	57°14°	0%	0 mph0 km/h, gusts 12 mph20 km/h	80%	79%	0
Sun 11p	Cloudy	55°13° (likely 55°13° to 57°14°)	55°13°	0%	0 mph0 km/h, gusts 13 mph21 km/h	83%	78%	0
Mon 12a	Cloudy	54°12° (likely 54°12° to 56°13°)	54°12°	0%	0 mph0 km/h, gusts 15 mph24 km/h	86%	74%	0
Mon 1a	Cloudy	53°12° (likely 53°12° to 54°12°)	53°12°	0%	0 mph0 km/h, gusts 14 mph23 km/h	89%	71%	0
Mon 2a	Cloudy	52°11° (likely 52°11° to 53°12°)	52°11°	0%	5 mph8 km/h from N, gusts 13 mph20 km/h	89%	72%	0
Mon 3a	Cloudy	51°11° (likely 51°11° to 52°11°)	51°11°	0%	5 mph8 km/h from N, gusts 14 mph23 km/h	93%	75%	0
Mon 4a	Cloudy	51°11° (likely 50°10° to 52°11°)	51°11°	0%	5 mph8 km/h from NE, gusts 11 mph18 km/h	89%	90%	0
Mon 5a	Cloudy	51°11° (likely 50°10° to 52°11°)	51°11°	0%	5 mph8 km/h from NE, gusts 13 mph22 km/h	89%	87%	0
Mon 6a	Cloudy	51°11° (likely 49°9° to 52°11°)	51°11°	0%	5 mph8 km/h from NE, gusts 13 mph21 km/h	86%	93%	0
Mon 7a	Cloudy	50°10° (likely 49°9° to 51°11°)	47°8°	0%	5 mph8 km/h from NE, gusts 14 mph22 km/h	89%	92%	0
Mon 8a	Partly sunny	50°10° (likely 50°10° to 52°11°)	47°8°	0%	5 mph8 km/h from NE, gusts 14 mph23 km/h	89%	89%	0
Mon 9a	Cloudy	53°12° (likely 52°11° to 53°12°)	53°12°	0%	5 mph8 km/h from NE, gusts 16 mph26 km/h	83%	90%	0
Mon 10a	Cloudy	56°13° (likely 54°12° to 56°13°)	56°13°	0%	10 mph16 km/h from NE, gusts 16 mph26 km/h	74%	87%	1
Mon 11a	Cloudy	59°15° (likely 56°13° to 59°15°)	59°15°	0%	10 mph16 km/h from NE, gusts 16 mph25 km/h	67%	87%	2
Mon 12p	Cloudy	61°16° (likely 58°14° to 61°16°)	61°16°	0%	10 mph16 km/h from E, gusts 14 mph23 km/h	62%	83%	3
Mon 1p	Cloudy	62°17° (likely 59°15° to 63°17°)	62°17°	0%	10 mph16 km/h from E, gusts 14 mph22 km/h	60%	90%	3

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 24. Cloudy. High 71°22°, low 52°11°. Typical 57°14° / 37°3°. Dry. Forecasts agree.
1. Afternoon
  noon–6 PM
  Cloudy, 71°22°
  Dry
2. Evening
  6 PM–midnight
  Mostly clear, 60°16°
  Dry
3. Overnight
  midnight–6 AM
  Cloudy, 53°12°
  Dry
Official NWS forecast
Today: Mostly sunny, with a high near 71. South wind around 10 mph.
Tonight: Mostly cloudy, with a low around 52. South wind 5 to 10 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
68°20°–71°22°
Low, likely
50°10°–52°11°
Typical high / low
57°14° / 37°3°
Wind
12 mph19 km/h, gusts 20 mph32 km/h
UV peak
4
Tomorrow, Oct 25. Cloudy. High 72°22°, low 50°10°. Typical 56°13° / 37°3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 54°12°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 72°22°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 59°15°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 51°11°
  Dry
Official NWS forecast
Day: Mostly sunny, with a high near 72. Southwest wind around 5 mph.
Night: Mostly cloudy, with a low around 50. Northwest wind 0 to 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
70°21°–73°23°
Low, likely
50°10°–53°12°
Typical high / low
56°13° / 37°3°
Wind
11 mph17 km/h, gusts 18 mph28 km/h
UV peak
3
Monday, Oct 26. Mostly cloudy. High 63°17°, low 45°7°. Typical 56°13° / 37°3°. Dry. Mostly agree. Best day outdoors this week.
1. Morning
  6 AM–noon
  Cloudy, 50°10°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 62°17°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 51°11°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 49°9°
  Dry
Official NWS forecast
Day: Partly sunny, with a high near 63. Northeast wind 5 to 10 mph.
Night: Mostly cloudy, with a low around 45. East wind 10 to 15 mph.
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 63°17°).
High, likely
60°16°–63°17°
Low, likely
45°7°–50°10°
Typical high / low
56°13° / 37°3°
Wind
15 mph24 km/h, gusts 21 mph34 km/h
UV peak
3
Tuesday, Oct 27. Cloudy. High 67°19°, low 52°11°. Typical 55°13° / 36°2°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 51°10°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 67°20°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 60°16°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 56°13°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 67. Southeast wind around 10 mph.
Night: Mostly cloudy, with a low around 52. South wind 5 to 10 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
65°18°–70°21°
Low, likely
47°8°–52°11°
Typical high / low
55°13° / 36°2°
Wind
13 mph21 km/h, gusts 23 mph37 km/h
UV peak
3
Wednesday, Oct 28. Partly sunny. High 72°22°, low 53°12°. Typical 55°13° / 36°2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 56°13°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 70°21°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 63°17°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 59°15°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 72.
Night: A slight chance of showers and thunderstorms after 7pm. Partly cloudy, with a low around 53. Chance of precipitation is 20%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
67°19°–73°23°
Low, likely
53°12°–58°14°
Typical high / low
55°13° / 36°2°
Wind
16 mph25 km/h, gusts 30 mph49 km/h
UV peak
3
Thursday, Oct 29. Showers. High 71°22°, low 52°11°. Typical 54°12° / 36°2°. Rain 0.07 in1.8 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 59°15°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 67°19°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 60°16°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 53°11°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain showers. Mostly sunny, with a high near 71. Chance of precipitation is 20%.
Night: A slight chance of rain showers. Partly cloudy, with a low around 52. Chance of precipitation is 20%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
64°18°–71°22°
Low, likely
52°11°–58°14°
Typical high / low
54°12° / 36°2°
Wind
14 mph23 km/h, gusts 31 mph50 km/h
UV peak
2
Friday, Oct 30. Showers. High 71°22°, low 54°12°. Typical 54°12° / 35°2°. Rain 0.04 in1 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 55°13°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 69°21°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 64°18°
  20% chance
4. Overnight
  midnight–6 AM
  Cloudy, 60°15°
  30% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of rain showers. Partly sunny, with a high near 71. Chance of precipitation is 20%.
Night: A slight chance of rain showers. Mostly cloudy, with a low around 54. Chance of precipitation is 20%.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
66°19°–73°23°
Low, likely
50°10°–57°14°
Typical high / low
54°12° / 35°2°
Wind
19 mph31 km/h, gusts 31 mph50 km/h
UV peak
2
Saturday, Oct 31. Drizzle. High 68°20°, low 58°14°. Typical 53°12° / 35°2°. Rain 0.13 in3.3 mm, 40% chance. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 60°16°
  30% chance
2. Afternoon
  noon–6 PM
  Cloudy, 70°21°
  30% chance
3. Evening
  6 PM–midnight
  Drizzle, 63°17°
  40% chance · 0.06 in1.6 mm
4. Overnight
  midnight–6 AM
  Drizzle, 60°15°
  50% chance · 0.11 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
67°19°–70°21°
Low, likely
55°13°–61°16°
Typical high / low
53°12° / 35°2°
Wind
19 mph30 km/h, gusts 26 mph42 km/h
UV peak
2
Sunday, Nov 1. Drizzle. High 63°17°, low 55°13°. Typical 53°12° / 34°1°. Rain 0.48 in12 mm, 50% chance. Forecasts agree.
1. Morning
  6 AM–noon
  Drizzle, 60°16°
  40% chance · 0.13 in3.2 mm
2. Afternoon
  noon–6 PM
  Drizzle, 63°17°
  40% chance · 0.11 in2.8 mm
3. Evening
  6 PM–midnight
  Showers, 60°16°
  40% chance · 0.22 in5.7 mm
4. Overnight
  midnight–6 AM
  Showers, 48°9°
  30% chance · 0.1 in2.6 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 agreeIndependent forecasts are close; the range is narrow.
High, likely
62°17°–64°18°
Low, likely
51°11°–59°15°
Typical high / low
53°12° / 34°1°
Wind
22 mph35 km/h, gusts 37 mph59 km/h
UV peak
1
Monday, Nov 2. Showers. High 56°13°, low 47°8°. Typical 52°11° / 34°1°. Rain 0.33 in8.4 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Drizzle, 48°9°
  30% chance · 0.01 in0.4 mm
2. Afternoon
  noon–6 PM
  Drizzle, 56°13°
  30% chance · 0.12 in3.1 mm
3. Evening
  6 PM–midnight
  Drizzle, 52°11°
  30% chance · 0.26 in6.5 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
50°10°–66°19°
Low, likely
39°4°–59°15°
Typical high / low
52°11° / 34°1°
Wind
20 mph32 km/h, gusts 41 mph65 km/h

10 days15 days30 days

The outlook

Today
Dry, high 71°, low 52°.
Tomorrow
Dry, high 72°, low 50°.
Monday
Dry, high 63°, low 45°, cooling off.
Rest of week
Highs 56–72°; chance of precipitation on Saturday, Sunday.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (MKX) (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

Rock River at Lake Koshkonong

0.2 mi

Below flood stage

Level: 6.4 ft

Reading from Sat 12 PM · NWS gauge page

Rock River at Newville

4.6 mi

Below flood stage

Level: 2.7 ft

Reading from Sat 12 PM · NWS gauge page

Rock River at Fort Atkinson

6.8 mi

Below flood stage

Level: 11.5 ft
Flow: 1,190 cfs

Reading from Sat 12 PM · NWS gauge page

Rock River at Jefferson

12 mi

Below flood stage

Level: 4.5 ft
Flow: 1,340 cfs

Reading from Sat 12 PM · NWS gauge page

For your home

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

Heating this week

About 90% less heating than a typical week.

This week 14Typical 135

Heating degree days, base 65°F

Comfort

Dry air outside (dew point 46°F).

Open the windows?

Today, 3:00 PM–8:00 PM

Good stretch to open the windows.

Is this typical?

Lake Mills Wwtp · official normals 1991–2020 · records 1893–2026

Oct 24, today vs a typical year

Today’s expected high is 14°8° warmer than typical.

Last 7 days vs normal

On average 6°3° warmer than normal (daily mean temperature).

±0°SunOct 18
+3°+1°MonOct 19
+4°+2°TueOct 20
+6°+3°WedOct 21
+8°+4°ThuOct 22
+11°+6°FriOct 23
+13°+7°SatOct 24

Lake Koshkonong weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 39 min; Losing 2 min 44 s a day; shortest Dec 21, 1 h 38 min less
Golden hour: 5:19–6:16 PM; Morning 7:02–7:59 AM
Blue hour: 6:16–6:28 PM; Morning 6:51–7:02 AM; first light 6:51 AM

Stars tonight? Poor

Clouds most of the night (about 68% cover).

Moon

Waxing gibbous

97% lit · growing

Today: sets 5:32 AM · rises 4:57 PM
Full moon: Oct 25
New moon: Nov 9

Looking northwest from Lake Koshkonong. The highest point on the skyline is about 2,100 ft, 17 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

Lake Koshkonong, WI weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Rock River at Lake Koshkonong

Rock River at Newville

Rock River at Fort Atkinson

Rock River at Jefferson

For your home

Heating this week

Comfort

Open the windows?

Is this typical?

Oct 24, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Poor

Moon