Observed 8:05 AM MDT at KGTF

Sun River, MT weather

Sunny and 28°−2°, 10°6° colder than a typical Oct 24, freeze watch tonight, low 23°−5°.

Mostly agree

Now 28°−2°

Sunny · Feels like 20°−7°

Feels like: 20°−7°; Wind chill from 9 mph15 km/h wind · air 28°−2°
Wind: 9 mph15 km/h; From the south. 35–9 mph15 km/h through 8 PM
Dew point: 21°−6°; Dry · up to 31°−1° by 1 PM
UV tomorrow: 3Moderate; Moderate 12–4 PM · peak 3
Air quality: 2Good; Main pollutant: PM2.5 (fine particles)

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

21°12° cooler than this time yesterday (48°9° then, 27°−3° now)

Good hours for

Hard freeze until 11 AM (low 21°−6°)
Above 30°−1° today by 11 AM
High 42°6° today at 2 PM
Hard freeze tonight 8 PM–noon (low 22°−6°)
Hard freeze tomorrow night from 7 PM (low 22°−6°)

This morningUp to 33°1° by 11 AM · freezing, low 21°−6° · Clear
This afternoonUp to 42°6° by 2 PM · Clear
TonightDown to 24°−4° by 5 AM · freezing, low 24°−4° · Partly cloudy
Tomorrow morningUp to 31°−1° by 11 AM · freezing, low 22°−6° · Partly cloudy
Tomorrow afternoonUp to 37°3° by 5 PM · Mostly cloudy
Tomorrow nightDown to 22°−6° by 5 AM · freezing, low 22°−6° · Mostly 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 8a	Sunny	21°−6° (likely 21°−6° to 30°−1°)	16°−9°	0%	3 mph5 km/h from S, gusts 3 mph5 km/h	95%	10%	0
Sat 9a	Sunny	23°−5° (likely 22°−6° to 31°−1°)	18°−8°	0%	3 mph5 km/h from S, gusts 4 mph6 km/h	87%	12%	0
Sat 10a	Mostly sunny	29°−2° (likely 27°−3° to 35°2°)	24°−4°	0%	5 mph8 km/h from SSE, gusts 6 mph10 km/h	81%	36%	1
Sat 11a	Sunny	33°1° (likely 33°1° to 39°4°)	28°−2°	0%	5 mph8 km/h from SSE, gusts 11 mph17 km/h	78%	5%	1
Sat 12p	Sunny	36°2° (likely 36°2° to 42°6°)	32°0°	0%	5 mph8 km/h from SSE, gusts 15 mph24 km/h	75%	4%	2
Sat 1p	Sunny	39°4° (likely 39°4° to 45°7°)	35°2°	0%	5 mph8 km/h from SSE, gusts 18 mph29 km/h	72%	6%	2
Sat 2p	Sunny	42°6° (likely 42°6° to 46°8°)	39°4°	0%	5 mph8 km/h from SSE, gusts 17 mph28 km/h	68%	5%	2
Sat 3p	Sunny	41°5° (likely 41°5° to 48°9°)	37°3°	0%	6 mph10 km/h from SSE, gusts 15 mph25 km/h	66%	5%	2
Sat 4p	Sunny	42°6° (likely 42°6° to 48°9°)	38°3°	0%	6 mph10 km/h from SE, gusts 14 mph23 km/h	65%	4%	1
Sat 5p	Sunny	40°4° (likely 40°4° to 48°9°)	36°2°	0%	6 mph10 km/h from ESE, gusts 12 mph19 km/h	67%	40%	0
Sat 6p	Clear	38°3° (likely 38°3° to 45°7°)	34°1°	0%	6 mph10 km/h from E, gusts 6 mph9 km/h	77%	41%	0
Sat 7p	Mostly cloudy	35°2° (likely 35°2° to 40°4°)	31°−1°	0%	5 mph8 km/h from E, gusts 9 mph14 km/h	84%	52%	0
Sat 8p	Cloudy	31°−1° (likely 31°−1° to 38°3°)	28°−2°	0%	3 mph5 km/h from ENE, gusts 9 mph14 km/h	89%	68%	0
Sat 9p	Cloudy	30°−1° (likely 30°−1° to 37°3°)	26°−3°	0%	3 mph5 km/h from NE, gusts 8 mph12 km/h	91%	70%	0
Sat 10p	Partly cloudy	28°−2° (likely 28°−2° to 36°2°)	24°−4°	0%	3 mph5 km/h from NNE, gusts 6 mph10 km/h	93%	58%	0
Sat 11p	Mostly cloudy	27°−3° (likely 27°−3° to 35°2°)	23°−5°	0%	3 mph5 km/h from NNE, gusts 7 mph11 km/h	93%	54%	0
Sun 12a	Cloudy	26°−3° (likely 26°−3° to 35°2°)	20°−7°	0%	5 mph8 km/h from NNE, gusts 7 mph12 km/h	95%	84%	0
Sun 1a	Partly cloudy	26°−3° (likely 26°−3° to 35°2°)	22°−6°	0%	3 mph5 km/h from N, gusts 6 mph10 km/h	94%	53%	0
Sun 2a	Cloudy	26°−3° (likely 26°−3° to 33°1°)	20°−7°	0%	5 mph8 km/h from N, gusts 10 mph17 km/h	93%	70%	0
Sun 3a	Mostly clear	25°−4° (likely 25°−4° to 33°1°)	19°−7°	0%	5 mph8 km/h from N, gusts 11 mph18 km/h	93%	37%	0
Sun 4a	Clear	25°−4° (likely 25°−4° to 33°1°)	21°−6°	0%	3 mph5 km/h from NNW, gusts 11 mph18 km/h	93%	33%	0
Sun 5a	Clear	24°−4° (likely 24°−4° to 33°1°)	20°−7°	0%	3 mph5 km/h from NNW, gusts 11 mph18 km/h	92%	23%	0
Sun 6a	Clear	24°−4° (likely 24°−4° to 32°0°)	20°−7°	0%	3 mph5 km/h from NNW, gusts 11 mph17 km/h	91%	22%	0
Sun 7a	Clear	23°−5° (likely 23°−5° to 32°0°)	18°−8°	0%	3 mph5 km/h from NNW, gusts 10 mph16 km/h	91%	23%	0
Sun 8a	Mostly cloudy	22°−6° (likely 22°−6° to 32°0°)	17°−8°	0%	3 mph5 km/h from NNW, gusts 11 mph18 km/h	93%	33%	0
Sun 9a	Cloudy	24°−4° (likely 24°−4° to 32°0°)	24°−4°	0%	2 mph3 km/h from N, gusts 11 mph17 km/h	91%	60%	0
Sun 10a	Cloudy	28°−2° (likely 28°−2° to 32°0°)	28°−2°	0%	2 mph3 km/h from N, gusts 9 mph15 km/h	84%	66%	1
Sun 11a	Cloudy	31°−1° (likely 31°−1° to 33°1°)	31°−1°	0%	2 mph3 km/h from N, gusts 8 mph13 km/h	77%	68%	2
Sun 12p	Cloudy	33°1° (likely 32°0° to 34°1°)	33°1°	0%	2 mph3 km/h from NNE, gusts 7 mph11 km/h	72%	79%	3
Sun 1p	Cloudy	34°1° (likely 34°1° to 36°2°)	34°1°	0%	2 mph3 km/h from NNE, gusts 6 mph10 km/h	68%	80%	3
Sun 2p	Cloudy	35°2° (likely 35°2° to 37°3°)	35°2°	0%	2 mph3 km/h from NNE, gusts 6 mph10 km/h	65%	82%	3
Sun 3p	Cloudy	36°2° (likely 35°2° to 38°3°)	33°1°	0%	3 mph5 km/h from NE, gusts 6 mph10 km/h	64%	80%	3
Sun 4p	Cloudy	36°2° (likely 35°2° to 38°3°)	33°1°	0%	3 mph5 km/h from NE, gusts 7 mph11 km/h	63%	80%	2
Sun 5p	Cloudy	37°3° (likely 35°2° to 38°3°)	34°1°	0%	3 mph5 km/h from NE, gusts 7 mph12 km/h	65%	81%	1
Sun 6p	Cloudy	34°1° (likely 34°1° to 37°3°)	34°1°	0%	1 mph2 km/h from ENE, gusts 8 mph13 km/h	74%	79%	0
Sun 7p	Cloudy	31°−1° (likely 31°−1° to 36°2°)	31°−1°	0%	1 mph2 km/h from ENE, gusts 7 mph11 km/h	82%	78%	0
Sun 8p	Cloudy	29°−2° (likely 29°−2° to 36°2°)	29°−2°	0%	1 mph2 km/h from ENE, gusts 5 mph9 km/h	88%	79%	0
Sun 9p	Cloudy	27°−3° (likely 27°−3° to 37°3°)	27°−3°	0%	1 mph2 km/h from NW, gusts 8 mph13 km/h	92%	81%	0
Sun 10p	Cloudy	26°−3° (likely 26°−3° to 36°2°)	26°−3°	0%	1 mph2 km/h from NW, gusts 8 mph13 km/h	95%	87%	0
Sun 11p	Cloudy	25°−4° (likely 25°−4° to 34°1°)	25°−4°	0%	1 mph2 km/h from NW, gusts 7 mph12 km/h	96%	89%	0
Mon 12a	Cloudy	24°−4° (likely 24°−4° to 32°0°)	24°−4°	0%	1 mph2 km/h from W, gusts 6 mph10 km/h	97%	88%	0
Mon 1a	Cloudy	24°−4° (likely 24°−4° to 32°0°)	24°−4°	0%	1 mph2 km/h from W, gusts 5 mph9 km/h	97%	87%	0
Mon 2a	Cloudy	24°−4° (likely 23°−5° to 32°0°)	24°−4°	0%	1 mph2 km/h from W, gusts 4 mph7 km/h	97%	85%	0
Mon 3a	Cloudy	23°−5° (likely 23°−5° to 32°0°)	23°−5°	0%	0 mph0 km/h, gusts 4 mph6 km/h	96%	80%	0
Mon 4a	Mostly cloudy	23°−5° (likely 22°−6° to 32°0°)	23°−5°	0%	0 mph0 km/h, gusts 4 mph6 km/h	96%	70%	0
Mon 5a	Mostly cloudy	22°−6° (likely 21°−6° to 31°−1°)	22°−6°	0%	0 mph0 km/h, gusts 3 mph5 km/h	96%	71%	0
Mon 6a	Cloudy	22°−6° (likely 20°−7° to 31°−1°)	22°−6°	0%	0 mph0 km/h, gusts 3 mph5 km/h	96%	72%	0
Mon 7a	Mostly cloudy	22°−6° (likely 15°−9° to 30°−1°)	22°−6°	0%	0 mph0 km/h, gusts 3 mph5 km/h	98%	72%	0

Days ahead

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

Today, Oct 24. Cloudy. High 42°6°, low 22°−6°. Typical 52°11° / 31°−1°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Mostly sunny, 21°−6°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 42°6°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 31°−1°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 24°−4°
  Dry
Official NWS forecast
Today: Areas of fog before 9am. Sunny, with a high near 42. South southeast wind around 6 mph.
Tonight: Mostly cloudy, with a low around 22. North northeast wind around 6 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
42°6°–48°9°
Low, likely
20°−7°–29°−2°
Typical high / low
52°11° / 31°−1°
Wind
14 mph22 km/h, gusts 24 mph39 km/h
UV peak
4
Tomorrow, Oct 25. Cloudy. High 37°3°, low 21°−6°. Typical 51°11° / 31°−1°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 22°−6°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 37°3°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 29°−2°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 22°−6°
  Dry
Official NWS forecast
Day: Mostly cloudy, with a high near 37. North wind around 3 mph.
Night: Mostly cloudy, with a low around 21. North northwest wind around 1 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
36°2°–38°3°
Low, likely
21°−6°–31°−1°
Typical high / low
51°11° / 31°−1°
Wind
9 mph14 km/h, gusts 16 mph26 km/h
UV peak
3
Monday, Oct 26. Mostly cloudy. High 41°5°, low 27°−3°. Typical 51°11° / 30°−1°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 24°−4°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 42°5°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 33°1°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 32°0°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 41. East wind 0 to 5 mph.
Night: Mostly cloudy, with a low around 27. West southwest wind around 2 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
40°4°–43°6°
Low, likely
19°−7°–29°−2°
Typical high / low
51°11° / 30°−1°
Wind
6 mph9 km/h
UV peak
3
Tuesday, Oct 27. Mostly cloudy. High 48°9°, low 29°−2°. Typical 50°10° / 30°−1°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 36°2°
  20% chance · 0.07 in1.8 mm
2. Afternoon
  noon–6 PM
  Sunny, 49°10°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 41°5°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 37°3°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 48. Southwest wind 1 to 10 mph, with gusts as high as 20 mph.
Night: A chance of rain before 3am, then a chance of snow. Mostly cloudy, with a low around 29. West wind 8 to 12 mph. New snow accumulation of less than half an inch possible.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
46°8°–52°11°
Low, likely
29°−2°–34°1°
Typical high / low
50°10° / 30°−1°
Wind
17 mph27 km/h, gusts 30 mph48 km/h
UV peak
2
Wednesday, Oct 28. Snow. High 43°6°, low 24°−4°. Typical 50°10° / 30°−1°. Snow 0.01 in0.3 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 36°2°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 51°10°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 39°4°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 30°−1°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of snow before noon. Partly sunny, with a high near 43.
Night: A chance of snow. Mostly cloudy, with a low around 24.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
43°6°–53°12°
Low, likely
24°−4°–37°3°
Typical high / low
50°10° / 30°−1°
Wind
16 mph25 km/h, gusts 25 mph40 km/h
UV peak
3
Thursday, Oct 29. Snow. High 40°4°, low 24°−4°. Typical 49°9° / 29°−2°. Snow 0–1 in0–3 cm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 30°−1°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 36°2°
  20% chance
3. Evening
  6 PM–midnight
  Cloudy, 34°1°
  Dry
4. Overnight
  midnight–6 AM
  Snow, 31°0°
  20% chance · 0.2 in0.6 cm
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of snow before noon. Mostly cloudy, with a high near 40.
Night: A slight chance of snow. Mostly cloudy, with a low around 24.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
33°1°–42°6°
Low, likely
24°−4°–31°−1°
Typical high / low
49°9° / 29°−2°
Wind
13 mph20 km/h, gusts 22 mph35 km/h
UV peak
3
Friday, Oct 30. Snow. High 43°6°, low 25°−4°. Typical 49°9° / 29°−2°. Snow 0–2 in0–5 cm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 32°0°
  20% chance · 0.3 in0.7 cm
2. Afternoon
  noon–6 PM
  Drizzle, 36°2°
  20% chance · 0.04 in1 mm
3. Evening
  6 PM–midnight
  Drizzle, 32°0°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 29°−2°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of snow before noon. Partly sunny, with a high near 43.
Night: A slight chance of snow. Partly cloudy, with a low around 25.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
32°0°–43°6°
Low, likely
25°−4°–35°2°
Typical high / low
49°9° / 29°−2°
Wind
9 mph14 km/h, gusts 15 mph24 km/h
UV peak
1
Saturday, Oct 31. Fog. High 38°3°, low 26°−3°. Typical 48°9° / 29°−2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 28°−2°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 38°3°
  Dry
3. Evening
  6 PM–midnight
  Clear, 32°0°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 25°−4°
  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
33°1°–45°7°
Low, likely
18°−8°–34°1°
Typical high / low
48°9° / 29°−2°
Wind
21 mph34 km/h, gusts 29 mph47 km/h
UV peak
3
Sunday, Nov 1. Sunny. High 43°6°, low 26°−3°. Typical 48°9° / 28°−2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 26°−3°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 43°6°
  Dry
3. Evening
  6 PM–midnight
  Clear, 37°3°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 33°1°
  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
34°1°–50°10°
Low, likely
14°−10°–32°0°
Typical high / low
48°9° / 28°−2°
Wind
15 mph24 km/h, gusts 27 mph44 km/h
UV peak
3
Monday, Nov 2. Cloudy. High 47°8°, low 30°−1°. Typical 48°9° / 28°−2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 35°2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 50°10°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 39°4°
  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
35°2°–57°14°
Low, likely
22°−6°–35°2°
Typical high / low
48°9° / 28°−2°
Wind
12 mph19 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 42°, low 22°.
Tomorrow
Dry, high 37°, low 21°, cooling off.
Monday
Dry, high 41°, low 27°, warming up.
Rest of week
Mostly dry, highs 38–48°.

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

Tank Coulee

8.1 mi

Level: 0.8 ft

Reading from Sat 6:45 AM · NWS gauge page

Muddy Creek at Vaughn

8.8 mi

Below flood stage

Level: 3.5 ft
Flow: 90 cfs

Reading from Sat 6:30 AM · NWS gauge page

Sun River near Simms

9.9 mi

Below flood stage

Level: 2.9 ft

Reading from Sat 6:30 AM · NWS gauge page

Sun River near Vaughn

9.9 mi

Below flood stage

Level: 2.5 ft
Flow: 615 cfs

Reading from Sat 7 AM · NWS gauge page

For your home

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

Pipes: watch the cold

Tonight’s low: 23°−5°

Overnight low near 23°F — not yet at drip-the-faucets cold, but worth watching if it's forecast to drop further.

Heating this week

About 60% less heating than a typical week.

This week 70Typical 174

Heating degree days, base 65°F

Heat-pump hours, next 7 days

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

Comfort

Dry air outside (dew point 21°F). Indoor air will run dry too — a humidifier keeping indoor relative humidity in the 30–50% range is more comfortable and cuts static shocks, without going so high it fogs cold windows.

Open the windows?

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

Is this typical?

Fairfield · official normals 1991–2020 · records 1927–2026

Oct 24, today vs a typical year

Today’s expected high is 10°6° colder than typical.

Last 7 days vs normal

—SunOct 18
—MonOct 19
—TueOct 20
—WedOct 21
—ThuOct 22
—FriOct 23
—SatOct 24

Sun River weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 23 min; Losing 3 min 12 s a day; shortest Dec 21, 1 h 57 min less
Golden hour: 5:39–6:41 PM; Morning 7:39–8:42 AM
Blue hour: 6:41–6:53 PM; Morning 7:27–7:39 AM; first light 7:27 AM

Stars tonight? Fair

Mostly clear 5–7:28 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

97% lit · growing

Today: sets 6:12 AM · rises 5:23 PM
Full moon: Oct 25
New moon: Nov 9

Looking west from Sun River. The highest point on the skyline is about 9,000 ft, 54 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

Sun River, MT weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Monday

Rest of week

What changed since yesterday

Radar

Rivers

Tank Coulee

Muddy Creek at Vaughn

Sun River near Simms

Sun River near Vaughn

For your home

Pipes: watch the cold

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? Fair

Moon