Observed 7:55 PM MDT at KRIW

Arapahoe, WY weather

Clear and 37°3°, 8°4° colder than a typical Oct 24.

Mostly agree

Now 37°3°

Clear · Feels like 34°1°

Wind: 5 mph7 km/h; From the northwest. 35–6 mph10 km/h through 8 AM
Dew point: 28°−2°; Dry, static shocks likely
UV tomorrow: 3Moderate; Moderate 11 AM–5 PM · peak 3
Air quality: 15Good; Main pollutant: PM10 (dust)

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Below freezing tomorrow 4–9 AM (low 30°−1°)
Low 30°−1° tomorrow at 7 AM
Above 40°4° tomorrow by 11 AM
High 50°10° tomorrow at 5 PM
Fog Monday 8–10 AM

TonightDown to 32°0° by 4 AM · freezing, low 32°0° · Mostly cloudy
Tomorrow morningUp to 43°6° by 11 AM · freezing, low 30°−1° · Mostly cloudy
Tomorrow afternoonUp to 50°10° by 5 PM · Mostly cloudy
Tomorrow nightDown to 34°1° by 5 AM · Mostly cloudy
Monday morningUp to 44°7° by 11 AM · Partly cloudy
Monday afternoonUp to 57°14° by 4 PM · Clear

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Sat 8p	Cloudy	43°6° (likely 39°4° to 43°6°)	40°4°	0%	5 mph8 km/h from NNE, gusts 4 mph6 km/h	66%	81%	0
Sat 9p	Cloudy	39°4° (likely 37°3° to 41°5°)	35°2°	0%	6 mph10 km/h from NNE, gusts 4 mph7 km/h	67%	76%	0
Sat 10p	Cloudy	38°3° (likely 37°3° to 40°4°)	34°1°	0%	5 mph8 km/h from NNE, gusts 4 mph7 km/h	71%	80%	0
Sat 11p	Clear	37°3° (likely 36°2° to 39°4°)	33°1°	0%	5 mph8 km/h from N, gusts 3 mph5 km/h	72%	43%	0
Sun 12a	Clear	36°2° (likely 34°1° to 37°3°)	31°−1°	0%	6 mph10 km/h from NNW, gusts 2 mph3 km/h	73%	40%	0
Sun 1a	Partly cloudy	35°2° (likely 33°1° to 36°2°)	31°−1°	0%	5 mph8 km/h from NW, gusts 4 mph6 km/h	77%	43%	0
Sun 2a	Cloudy	34°1° (likely 32°0° to 35°2°)	30°−1°	0%	5 mph8 km/h from NW, gusts 4 mph6 km/h	79%	66%	0
Sun 3a	Cloudy	33°1° (likely 31°−1° to 34°1°)	29°−2°	0%	5 mph8 km/h from WNW, gusts 2 mph4 km/h	80%	64%	0
Sun 4a	Cloudy	32°0° (likely 31°−1° to 34°1°)	27°−3°	0%	5 mph8 km/h from WNW, gusts 2 mph3 km/h	81%	68%	0
Sun 5a	Partly cloudy	32°0° (likely 30°−1° to 33°1°)	27°−3°	0%	5 mph8 km/h from WNW, gusts 2 mph3 km/h	83%	73%	0
Sun 6a	Partly cloudy	32°0° (likely 30°−1° to 34°1°)	29°−2°	5%	3 mph5 km/h from WNW, gusts 3 mph5 km/h	84%	69%	0
Sun 7a	Cloudy	30°−1° (likely 30°−1° to 34°1°)	26°−3°	10%	3 mph5 km/h from NW, gusts 2 mph4 km/h	88%	63%	0
Sun 8a	Cloudy	32°0° (likely 31°−1° to 34°1°)	29°−2°	5%	3 mph5 km/h from W, gusts 3 mph4 km/h	83%	84%	0
Sun 9a	Mostly cloudy	35°2° (likely 35°2° to 36°2°)	32°0°	5%	3 mph5 km/h from W, gusts 2 mph4 km/h	76%	67%	0
Sun 10a	Partly sunny	39°4° (likely 38°3° to 40°4°)	39°4°	10%	2 mph3 km/h from WNW, gusts 2 mph4 km/h	71%	71%	1
Sun 11a	Cloudy	43°6° (likely 39°4° to 44°7°)	41°5°	5%	3 mph5 km/h from NNW, gusts 2 mph4 km/h	64%	80%	3
Sun 12p	Partly sunny	45°7° (likely 40°4° to 47°8°)	43°6°	5%	5 mph8 km/h from N, gusts 4 mph6 km/h	59%	80%	2
Sun 1p	Partly sunny	47°8° (likely 42°6° to 50°10°)	46°8°	5%	3 mph5 km/h from NE, gusts 5 mph7 km/h	57%	75%	3
Sun 2p	Partly sunny	49°9° (likely 43°6° to 52°11°)	47°8°	10%	5 mph8 km/h from NE, gusts 3 mph5 km/h	55%	67%	3
Sun 3p	Partly sunny	49°9° (likely 45°7° to 54°12°)	47°8°	5%	5 mph8 km/h from ENE, gusts 4 mph6 km/h	53%	70%	3
Sun 4p	Partly sunny	49°9° (likely 45°7° to 54°12°)	47°8°	5%	5 mph8 km/h from E, gusts 5 mph8 km/h	54%	72%	3
Sun 5p	Mostly cloudy	50°10° (likely 44°7° to 53°12°)	48°9°	5%	5 mph8 km/h from ENE, gusts 6 mph9 km/h	55%	64%	1
Sun 6p	Cloudy	48°9° (likely 43°6° to 51°11°)	46°8°	5%	5 mph8 km/h from ENE, gusts 5 mph7 km/h	58%	75%	0
Sun 7p	Cloudy	45°7° (likely 42°6° to 49°9°)	44°7°	5%	3 mph5 km/h from SSW, gusts 4 mph7 km/h	70%	79%	0
Sun 8p	Mostly cloudy	45°7° (likely 39°4° to 48°9°)	43°6°	0%	5 mph8 km/h from SSW, gusts 6 mph9 km/h	73%	64%	0
Sun 9p	Cloudy	42°6° (likely 37°3° to 46°8°)	40°4°	0%	3 mph5 km/h from SSE, gusts 5 mph9 km/h	75%	61%	0
Sun 10p	Cloudy	41°5° (likely 36°2° to 45°7°)	39°4°	0%	3 mph5 km/h from E, gusts 4 mph7 km/h	80%	98%	0
Sun 11p	Cloudy	40°4° (likely 36°2° to 44°7°)	38°3°	0%	3 mph5 km/h from N, gusts 6 mph9 km/h	81%	96%	0
Mon 12a	Cloudy	39°4° (likely 35°2° to 43°6°)	37°3°	0%	3 mph5 km/h from NNE, gusts 2 mph3 km/h	82%	80%	0
Mon 1a	Cloudy	38°3° (likely 37°3° to 41°5°)	34°1°	0%	5 mph8 km/h from N, gusts 2 mph4 km/h	85%	80%	0
Mon 2a	Cloudy	37°3° (likely 35°2° to 40°4°)	34°1°	0%	3 mph5 km/h from NW, gusts 4 mph6 km/h	88%	80%	0
Mon 3a	Mostly cloudy	35°2° (likely 34°1° to 40°4°)	35°2°	0%	2 mph3 km/h from WNW, gusts 3 mph5 km/h	88%	64%	0
Mon 4a	Partly cloudy	35°2° (likely 32°0° to 39°4°)	35°2°	0%	2 mph3 km/h from W, gusts 3 mph5 km/h	90%	42%	0
Mon 5a	Clear	34°1° (likely 31°−1° to 38°3°)	34°1°	0%	2 mph3 km/h from W, gusts 2 mph3 km/h	94%	28%	0
Mon 6a	Clear	33°1° (likely 31°−1° to 37°3°)	33°1°	0%	2 mph3 km/h from W, gusts 2 mph3 km/h	96%	24%	0
Mon 7a	Clear	33°1° (likely 30°−1° to 37°3°)	33°1°	0%	2 mph3 km/h from WNW, gusts 2 mph2 km/h	100%	14%	0
Mon 8a	Fog	34°1° (likely 30°−1° to 37°3°)	34°1°	0%	2 mph3 km/h from W, gusts 1 mph2 km/h	98%	47%	0
Mon 9a	Fog	36°2° (likely 33°1° to 37°3°)	36°2°	0%	2 mph3 km/h from SW, gusts 3 mph4 km/h	91%	49%	0
Mon 10a	Partly sunny	40°4° (likely 38°3° to 41°5°)	40°4°	0%	2 mph3 km/h from S, gusts 3 mph4 km/h	84%	37%	1
Mon 11a	Sunny	44°7° (likely 42°6° to 45°7°)	44°7°	0%	2 mph3 km/h from E, gusts 4 mph6 km/h	75%	16%	3
Mon 12p	Mostly sunny	49°9° (likely 45°7° to 49°9°)	49°9°	0%	2 mph3 km/h from ENE, gusts 4 mph6 km/h	67%	20%	4
Mon 1p	Sunny	52°11° (likely 48°9° to 52°11°)	52°11°	0%	3 mph5 km/h from ENE, gusts 4 mph6 km/h	60%	29%	4
Mon 2p	Sunny	55°13° (likely 50°10° to 55°13°)	55°13°	0%	3 mph5 km/h from ENE, gusts 4 mph7 km/h	54%	42%	4
Mon 3p	Sunny	56°13° (likely 52°11° to 56°13°)	56°13°	0%	5 mph8 km/h from ENE, gusts 4 mph7 km/h	50%	20%	4
Mon 4p	Sunny	57°14° (likely 53°12° to 57°14°)	57°14°	0%	5 mph8 km/h from ENE, gusts 4 mph6 km/h	48%	4%	3
Mon 5p	Sunny	56°13° (likely 53°12° to 56°13°)	56°13°	0%	3 mph5 km/h from ENE, gusts 4 mph7 km/h	49%	1%	1
Mon 6p	Clear	54°12° (likely 49°9° to 54°12°)	54°12°	0%	3 mph5 km/h from ENE, gusts 4 mph7 km/h	52%	3%	0
Mon 7p	Mostly clear	51°11° (likely 43°6° to 51°11°)	51°11°	0%	3 mph5 km/h from ESE, gusts 3 mph4 km/h	57%	17%	0

Days ahead

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

Today, Oct 24. Cloudy. High 47°8°, low 30°−1°. Typical 55°13° / 27°−3°. Dry. Mostly agree.
1. Evening
  6 PM–midnight
  Cloudy, 43°6°
  Dry
2. Overnight
  midnight–6 AM
  Cloudy, 32°0°
  Dry
Official NWS forecast
Tonight: Partly cloudy, with a low around 30. North wind around 6 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
45°7°–48°9°
Low, likely
30°−1°–37°3°
Typical high / low
55°13° / 27°−3°
Wind
14 mph22 km/h, gusts 31 mph49 km/h
UV peak
4
Tomorrow, Oct 25. Partly sunny. High 51°11°, low 32°0°. Typical 55°13° / 27°−3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly cloudy, 32°0°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 50°10°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 45°7°
  Dry
4. Overnight
  midnight–6 AM
  Mostly cloudy, 34°1°
  Dry
Official NWS forecast
Day: Mostly sunny, with a high near 51. North northwest wind around 5 mph.
Night: Mostly cloudy, with a low around 32. North northwest wind around 5 mph.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
45°7°–54°12°
Low, likely
30°−1°–32°0°
Typical high / low
55°13° / 27°−3°
Wind
6 mph10 km/h
UV peak
3
Monday, Oct 26. Mostly sunny. High 57°14°, low 35°2°. Typical 54°12° / 26°−3°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Fog, 34°1°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 57°14°
  Dry
3. Evening
  6 PM–midnight
  Clear, 46°8°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 40°4°
  Dry
Official NWS forecast
Day: Sunny, with a high near 57. Southwest wind around 5 mph.
Night: Mostly clear, with a low around 35. South wind 3 to 13 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
55°13°–57°14°
Low, likely
29°−2°–37°3°
Typical high / low
54°12° / 26°−3°
Wind
10 mph17 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 56°13°, low 29°−2°. Typical 54°12° / 26°−3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 38°3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 55°13°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 43°6°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 32°0°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 56. Southwest wind 14 to 21 mph, with gusts as high as 36 mph.
Night: Mostly clear, with a low around 29. West southwest wind around 7 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
53°12°–57°14°
Low, likely
29°−2°–41°5°
Typical high / low
54°12° / 26°−3°
Wind
27 mph43 km/h, gusts 35 mph56 km/h
UV peak
4
Wednesday, Oct 28. Mostly sunny. High 59°15°, low 33°1°. Typical 53°12° / 25°−4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 32°0°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 56°13°
  Dry
3. Evening
  6 PM–midnight
  Clear, 45°7°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 32°0°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 59.
Night: Mostly clear, with a low around 33.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
53°12°–59°15°
Low, likely
22°−6°–37°3°
Typical high / low
53°12° / 25°−4°
Wind
8 mph13 km/h, gusts 31 mph50 km/h
UV peak
4
Thursday, Oct 29. Cloudy. High 63°17°, low 37°3°. Typical 52°11° / 25°−4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 32°0°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 60°15°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 37°3°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 63.
Night: Mostly cloudy, with a low around 37.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
56°13°–63°17°
Low, likely
23°−5°–37°3°
Typical high / low
52°11° / 25°−4°
Wind
17 mph27 km/h
UV peak
4
Friday, Oct 30. Partly sunny. High 62°17°, low 36°2°. Typical 52°11° / 24°−4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 37°3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 60°16°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 42°5°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 62.
Night: A slight chance of rain showers after midnight. Partly cloudy, with a low around 36.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
57°14°–63°17°
Low, likely
29°−2°–44°7°
Typical high / low
52°11° / 24°−4°
Wind
19 mph31 km/h, gusts 33 mph53 km/h
UV peak
4
Saturday, Oct 31. Partly sunny. High 57°14°, low 39°4°. Typical 51°11° / 24°−4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 42°6°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 52°11°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 47°8°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 36°2°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 57.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
44°7°–61°16°
Low, likely
32°0°–47°8°
Typical high / low
51°11° / 24°−4°
Wind
19 mph31 km/h, gusts 29 mph47 km/h
UV peak
4
Sunday, Nov 1. Cloudy. High 53°12°, low 35°2°. Typical 51°11° / 24°−4°. Rain 0.05 in1.3 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 36°2°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 55°13°
  Dry
3. Evening
  6 PM–midnight
  Clear, 46°8°
  20% chance
4. Overnight
  midnight–6 AM
  Clear, 31°0°
  30% chance · 0.02 in0.5 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
48°9°–57°14°
Low, likely
15°−9°–46°8°
Typical high / low
51°11° / 24°−4°
Wind
10 mph16 km/h, gusts 21 mph33 km/h
UV peak
4
Monday, Nov 2. Cloudy. High 52°11°, low 31°−1°. Typical 50°10° / 23°−5°. Rain 0.07 in1.8 mm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Partly sunny, 34°1°
  30% chance
2. Afternoon
  noon–6 PM
  Sunny, 54°12°
  20% chance
3. Evening
  6 PM–midnight
  Clear, 41°5°
  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
46°8°–62°17°
Low, likely
18°−8°–36°2°
Typical high / low
50°10° / 23°−5°
Wind
12 mph20 km/h, gusts 25 mph40 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 47°, low 30°.
Tomorrow
Dry, high 51°, low 32°, warming up.
Monday
Dry, high 57°, low 35°, warming up.
Rest of week
Mostly dry, highs 52–63°.

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

Little Wind River near Riverton

3.9 mi

Below flood stage

Level: 2.8 ft
Flow: 443 cfs

Reading from Sat 7:15 PM · NWS gauge page

Wind River at Riverton

4.0 mi

Below flood stage

Level: 4.0 ft
Flow: 737 cfs

Reading from Sat 7 PM · NWS gauge page

Wind River above Boysen Reservoir near Shoshoni

15 mi

Below flood stage

Level: 3.2 ft
Flow: 1,140 cfs

Reading from Sat 7:15 PM · NWS gauge page

Wind River near Kinnear

17 mi

Below flood stage

Level: 4.0 ft
Flow: 544 cfs

Reading from Sat 7 PM · NWS gauge page

For your home

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

Heating this week

About 74% less heating than a typical week.

This week 46Typical 178

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 34
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 19 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 28°F).

Open the windows?

No stretch in the next few days is comfortable enough outside, by temperature, dew point and air quality.

Is this typical?

RIVERTON · official normals 1991–2020 · records 1907–2026

Oct 24, today vs a typical year

Today’s expected high is 8°4° colder than typical.

Last 7 days vs normal

On average 9°5° warmer than normal (daily mean temperature).

+4°+2°MonOct 19
+6°+3°TueOct 20
+10°+5°WedOct 21
+12°+6°ThuOct 22
+15°+8°FriOct 23
+8°+4°SatOct 24
—SunOct 25

Arapahoe weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 38 min; Losing 2 min 44 s a day; shortest Dec 21, 1 h 38 min less
Golden hour: 5:37–6:34 PM; Morning 7:20–8:18 AM
Blue hour: 6:34–6:45 PM; Morning 7:09–7:20 AM; first light 7:09 AM

Stars tonight? Poor

Clouds most of the night (about 64% cover).

Moon

Waxing gibbous

98% lit · growing

Today: sets 5:54 AM · rises 5:16 PM
Full moon: Oct 25
New moon: Nov 9

Looking west from Arapahoe. The highest point on the skyline is about 17,000 ft, 37 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

Arapahoe, WY weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Little Wind River near Riverton

Wind River at Riverton

Wind River above Boysen Reservoir near Shoshoni

Wind River near Kinnear

For your home

Heating this week

Heat-pump hours, next 7 days

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