Model estimate for 8:00 AM MDT (no recent station report)

Simms, MT weather

Foggy and 22°−6°, 9°5° colder than a typical Oct 24, freeze watch tonight, low 25°−4°.

Mostly agree

Now 22°−6°

Fog · Feels like 15°−9°

Feels like: 14°−10°; Wind chill from 6 mph10 km/h wind · air 22°−6°
Wind: 6 mph10 km/h; From the south. Gusts to 24 mph39 km/h around 12 PM
Dew point: 20°−7°; Dry · up to 29°−2° by 12 PM
Humidity: 91%; Air 22°−6°, dew point 20°−7° · frost likely
UV tomorrow: 3Moderate; Moderate 12–4 PM · peak 3

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

Good hours for

Hard freeze until 11 AM (low 22°−6°)
Fog until 9 AM
Above 30°−1° today by 10 AM
Hard freeze tonight 8 PM–noon (low 24°−4°)
Hard freeze tomorrow night from 7 PM (low 24°−4°)

This morningUp to 33°1° by 11 AM · freezing, low 22°−6° · Clear
This afternoonUp to 43°6° by 4 PM · Clear
TonightDown to 25°−4° by 5 AM · freezing, low 25°−4° · Partly cloudy
Tomorrow morningUp to 32°0° by 11 AM · freezing, low 24°−4° · Mostly cloudy
Tomorrow afternoonUp to 37°3° by 4 PM · Mostly cloudy
Tomorrow nightDown to 24°−4° by 4 AM · freezing, low 24°−4° · 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	Fog	22°−6° (likely 22°−6° to 32°0°)	15°−9°	0%	6 mph10 km/h from S, gusts 7 mph11 km/h	91%	29%	0
Sat 9a	Sunny	25°−4° (likely 25°−4° to 33°1°)	17°−8°	0%	7 mph11 km/h from S, gusts 12 mph20 km/h	83%	9%	0
Sat 10a	Sunny	30°−1° (likely 30°−1° to 35°2°)	22°−6°	0%	8 mph13 km/h from S, gusts 19 mph31 km/h	80%	10%	1
Sat 11a	Sunny	33°1° (likely 33°1° to 38°3°)	25°−4°	0%	10 mph16 km/h from S, gusts 22 mph35 km/h	74%	10%	1
Sat 12p	Sunny	37°3° (likely 37°3° to 41°5°)	29°−2°	0%	10 mph16 km/h from S, gusts 24 mph39 km/h	73%	10%	2
Sat 1p	Mostly sunny	39°4° (likely 39°4° to 43°6°)	33°1°	0%	10 mph16 km/h from S, gusts 24 mph39 km/h	72%	28%	2
Sat 2p	Sunny	42°6° (likely 42°6° to 45°7°)	36°2°	0%	9 mph14 km/h from S, gusts 21 mph34 km/h	69%	12%	2
Sat 3p	Sunny	42°6° (likely 42°6° to 46°8°)	37°3°	0%	8 mph13 km/h from SSE, gusts 19 mph31 km/h	66%	7%	2
Sat 4p	Partly sunny	43°6° (likely 43°6° to 47°8°)	39°4°	0%	7 mph11 km/h from SSE, gusts 18 mph29 km/h	67%	25%	1
Sat 5p	Sunny	41°5° (likely 41°5° to 46°8°)	37°3°	0%	6 mph10 km/h from SE, gusts 18 mph28 km/h	69%	40%	0
Sat 6p	Clear	39°4° (likely 39°4° to 44°7°)	36°2°	0%	5 mph8 km/h from ESE, gusts 14 mph22 km/h	79%	41%	0
Sat 7p	Mostly cloudy	36°2° (likely 36°2° to 41°5°)	33°1°	0%	3 mph5 km/h from E, gusts 5 mph9 km/h	87%	54%	0
Sat 8p	Cloudy	32°0° (likely 32°0° to 39°4°)	32°0°	0%	2 mph3 km/h from ENE, gusts 7 mph11 km/h	90%	73%	0
Sat 9p	Cloudy	30°−1° (likely 30°−1° to 38°3°)	30°−1°	0%	2 mph3 km/h from NNE, gusts 8 mph12 km/h	92%	70%	0
Sat 10p	Mostly cloudy	29°−2° (likely 29°−2° to 37°3°)	29°−2°	0%	2 mph3 km/h from NNE, gusts 7 mph11 km/h	94%	57%	0
Sat 11p	Mostly cloudy	28°−2° (likely 28°−2° to 36°2°)	28°−2°	0%	2 mph3 km/h from N, gusts 7 mph11 km/h	93%	41%	0
Sun 12a	Partly cloudy	28°−2° (likely 28°−2° to 36°2°)	24°−4°	0%	3 mph5 km/h from N, gusts 6 mph10 km/h	94%	68%	0
Sun 1a	Mostly clear	27°−3° (likely 27°−3° to 35°2°)	22°−6°	0%	5 mph8 km/h from N, gusts 7 mph11 km/h	96%	47%	0
Sun 2a	Mostly cloudy	27°−3° (likely 27°−3° to 33°1°)	22°−6°	0%	5 mph8 km/h from N, gusts 12 mph19 km/h	94%	77%	0
Sun 3a	Mostly cloudy	26°−3° (likely 26°−3° to 33°1°)	20°−7°	0%	5 mph8 km/h from N, gusts 11 mph18 km/h	93%	56%	0
Sun 4a	Mostly clear	26°−3° (likely 26°−3° to 33°1°)	20°−7°	0%	5 mph8 km/h from N, gusts 11 mph18 km/h	92%	37%	0
Sun 5a	Mostly clear	25°−4° (likely 25°−4° to 33°1°)	19°−7°	0%	5 mph8 km/h from NNW, gusts 12 mph19 km/h	93%	40%	0
Sun 6a	Cloudy	25°−4° (likely 25°−4° to 32°0°)	21°−6°	0%	3 mph5 km/h from NNW, gusts 11 mph18 km/h	92%	63%	0
Sun 7a	Cloudy	25°−4° (likely 25°−4° to 32°0°)	21°−6°	0%	3 mph5 km/h from NNW, gusts 11 mph17 km/h	91%	62%	0
Sun 8a	Cloudy	24°−4° (likely 24°−4° to 32°0°)	20°−7°	0%	3 mph5 km/h from NNW, gusts 11 mph17 km/h	91%	60%	0
Sun 9a	Cloudy	26°−3° (likely 26°−3° to 32°0°)	22°−6°	0%	3 mph5 km/h from N, gusts 10 mph17 km/h	89%	61%	0
Sun 10a	Cloudy	30°−1° (likely 30°−1° to 32°0°)	26°−3°	0%	3 mph5 km/h from N, gusts 10 mph16 km/h	81%	63%	1
Sun 11a	Cloudy	32°0° (likely 31°−1° to 33°1°)	29°−2°	0%	3 mph5 km/h from N, gusts 9 mph15 km/h	72%	76%	2
Sun 12p	Cloudy	33°1° (likely 32°0° to 34°1°)	29°−2°	0%	5 mph8 km/h from NNE, gusts 8 mph13 km/h	68%	80%	3
Sun 1p	Cloudy	34°1° (likely 33°1° to 36°2°)	30°−1°	0%	5 mph8 km/h from NNE, gusts 8 mph12 km/h	65%	81%	3
Sun 2p	Cloudy	35°2° (likely 34°1° to 38°3°)	31°−1°	0%	5 mph8 km/h from NNE, gusts 7 mph12 km/h	61%	82%	3
Sun 3p	Cloudy	36°2° (likely 35°2° to 39°4°)	33°1°	0%	3 mph5 km/h from NE, gusts 7 mph11 km/h	59%	78%	3
Sun 4p	Cloudy	37°3° (likely 35°2° to 39°4°)	34°1°	0%	3 mph5 km/h from NE, gusts 7 mph11 km/h	60%	83%	2
Sun 5p	Cloudy	36°2° (likely 35°2° to 38°3°)	33°1°	0%	3 mph5 km/h from NE, gusts 7 mph11 km/h	64%	86%	1
Sun 6p	Cloudy	35°2° (likely 33°1° to 37°3°)	35°2°	0%	1 mph2 km/h from ENE, gusts 7 mph12 km/h	73%	87%	0
Sun 7p	Cloudy	32°0° (likely 32°0° to 36°2°)	32°0°	0%	1 mph2 km/h from ENE, gusts 7 mph11 km/h	81%	87%	0
Sun 8p	Cloudy	30°−1° (likely 30°−1° to 36°2°)	30°−1°	0%	1 mph2 km/h from ENE, gusts 6 mph9 km/h	87%	86%	0
Sun 9p	Cloudy	28°−2° (likely 28°−2° to 35°2°)	28°−2°	0%	1 mph2 km/h from NNW, gusts 5 mph8 km/h	91%	88%	0
Sun 10p	Cloudy	27°−3° (likely 27°−3° to 36°2°)	27°−3°	0%	1 mph2 km/h from NNW, gusts 6 mph10 km/h	94%	91%	0
Sun 11p	Cloudy	26°−3° (likely 26°−3° to 36°2°)	26°−3°	0%	1 mph2 km/h from NNW, gusts 6 mph10 km/h	95%	91%	0
Mon 12a	Cloudy	26°−3° (likely 26°−3° to 36°2°)	26°−3°	0%	1 mph2 km/h from W, gusts 5 mph9 km/h	95%	88%	0
Mon 1a	Cloudy	25°−4° (likely 24°−4° to 34°1°)	25°−4°	0%	1 mph2 km/h from W, gusts 5 mph9 km/h	96%	85%	0
Mon 2a	Cloudy	25°−4° (likely 24°−4° to 32°0°)	25°−4°	0%	1 mph2 km/h from W, gusts 5 mph7 km/h	96%	81%	0
Mon 3a	Cloudy	25°−4° (likely 23°−5° to 32°0°)	25°−4°	0%	0 mph0 km/h, gusts 4 mph6 km/h	96%	75%	0
Mon 4a	Mostly cloudy	24°−4° (likely 22°−6° to 32°0°)	24°−4°	0%	0 mph0 km/h, gusts 4 mph6 km/h	96%	70%	0
Mon 5a	Mostly cloudy	24°−4° (likely 21°−6° to 31°−1°)	24°−4°	0%	0 mph0 km/h, gusts 3 mph6 km/h	96%	71%	0
Mon 6a	Mostly cloudy	24°−4° (likely 20°−7° to 31°−1°)	24°−4°	0%	0 mph0 km/h, gusts 3 mph5 km/h	96%	72%	0
Mon 7a	Mostly cloudy	24°−4° (likely 15°−9° to 30°−1°)	24°−4°	0%	0 mph0 km/h, gusts 3 mph4 km/h	97%	74%	0

Days ahead

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

Today, Oct 24. Fog. High 43°6°, low 24°−4°. Typical 52°11° / 31°−1°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 22°−6°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 43°6°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 32°0°
  Dry
4. Overnight
  midnight–6 AM
  Mostly cloudy, 25°−4°
  Dry
Official NWS forecast
Today: Patchy fog before 9am. Sunny, with a high near 43. South southeast wind 6 to 10 mph, with gusts as high as 18 mph.
Tonight: Mostly cloudy, with a low around 24. North northeast wind around 5 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
43°6°–47°8°
Low, likely
24°−4°–29°−2°
Typical high / low
52°11° / 31°−1°
Wind
19 mph30 km/h, gusts 31 mph50 km/h
UV peak
4
Tomorrow, Oct 25. Mostly cloudy. High 37°3°, low 23°−5°. Typical 51°11° / 31°−1°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Cloudy, 24°−4°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 37°3°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 30°−1°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 24°−4°
  Dry
Official NWS forecast
Day: Mostly cloudy, with a high near 37. North wind around 5 mph.
Night: Mostly cloudy, with a low around 23. Northwest wind around 1 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
35°2°–39°4°
Low, likely
23°−5°–32°0°
Typical high / low
51°11° / 31°−1°
Wind
9 mph14 km/h, gusts 18 mph29 km/h
UV peak
3
Monday, Oct 26. Cloudy. High 42°6°, low 29°−2°. Typical 51°11° / 30°−1°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 26°−4°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 42°6°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 34°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 42. Southeast wind 0 to 5 mph.
Night: A slight chance of rain before midnight. Mostly cloudy, with a low around 29. West southwest wind around 1 mph. Chance of precipitation is 20%.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
41°5°–44°7°
Low, likely
19°−7°–30°−1°
Typical high / low
51°11° / 30°−1°
Wind
6 mph10 km/h, gusts 13 mph21 km/h
UV peak
3
Tuesday, Oct 27. Mostly cloudy. High 49°9°, low 30°−1°. Typical 50°10° / 30°−1°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 37°3°
  20% chance · 0.04 in0.9 mm
2. Afternoon
  noon–6 PM
  Drizzle, 49°10°
  20% chance · 0.04 in1 mm
3. Evening
  6 PM–midnight
  Cloudy, 42°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 49. West southwest wind 2 to 10 mph, with gusts as high as 18 mph.
Night: A chance of rain before midnight, then a chance of snow. Mostly cloudy, with a low around 30. West wind around 10 mph, with gusts as high as 18 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
28°−2°–35°2°
Typical high / low
50°10° / 30°−1°
Wind
17 mph27 km/h, gusts 30 mph49 km/h
UV peak
2
Wednesday, Oct 28. Snow. High 44°7°, low 26°−3°. Typical 50°10° / 30°−1°. Snow 0.01 in0.3 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 36°2°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 50°10°
  Dry
3. Evening
  6 PM–midnight
  Partly cloudy, 39°4°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 31°−1°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of snow. Partly sunny, with a high near 44.
Night: A chance of snow. Mostly cloudy, with a low around 26.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
44°7°–52°11°
Low, likely
26°−3°–37°3°
Typical high / low
50°10° / 30°−1°
Wind
15 mph25 km/h, gusts 26 mph41 km/h
UV peak
3
Thursday, Oct 29. Snow. High 40°4°, low 25°−4°. Typical 49°9° / 29°−2°. Snow 0–1 in0–3 cm, 30% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 30°−1°
  20% chance
2. Afternoon
  noon–6 PM
  Cloudy, 36°2°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 34°1°
  20% chance
4. Overnight
  midnight–6 AM
  Snow, 31°−1°
  20% chance · 0.3 in0.7 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 25.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
32°0°–40°4°
Low, likely
25°−4°–31°−1°
Typical high / low
49°9° / 29°−2°
Wind
11 mph17 km/h, gusts 20 mph32 km/h
UV peak
3
Friday, Oct 30. Snow. High 43°6°, low 27°−3°. Typical 49°9° / 29°−2°. Snow 0–2 in0–5 cm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 31°0°
  20% chance · 0.2 in0.5 cm
2. Afternoon
  noon–6 PM
  Drizzle, 35°1°
  20% chance · 0.05 in1.3 mm
3. Evening
  6 PM–midnight
  Fog, 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. Mostly cloudy, with a low around 27.
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 mph15 km/h, gusts 16 mph26 km/h
Saturday, Oct 31. Fog. High 38°3°, low 26°−3°. Typical 48°9° / 29°−2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 27°−3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 37°3°
  Dry
3. Evening
  6 PM–midnight
  Clear, 31°−1°
  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
31°−1°–45°7°
Low, likely
19°−7°–32°0°
Typical high / low
48°9° / 29°−2°
Wind
22 mph35 km/h, gusts 27 mph44 km/h
UV peak
3
Sunday, Nov 1. Partly sunny. High 43°6°, low 25°−4°. Typical 48°9° / 28°−2°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly 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
  Partly cloudy, 33°0°
  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
15°−9°–31°−1°
Typical high / low
48°9° / 28°−2°
Wind
16 mph26 km/h, gusts 27 mph44 km/h
UV peak
3
Monday, Nov 2. Cloudy. High 47°8°, low 29°−2°. 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
36°2°–57°14°
Low, likely
21°−6°–34°1°
Typical high / low
48°9° / 28°−2°
Wind
11 mph18 km/h, gusts 23 mph37 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 43°, low 24°.
Tomorrow
Dry, high 37°, low 23°, cooling off.
Monday
Dry, high 42°, low 29°, warming up.
Rest of week
Mostly dry, highs 38–49°.

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

Sun River near Simms

1.2 mi

Below flood stage

Level: 2.9 ft

Reading from Sat 6:30 AM · NWS gauge page

Muddy Creek near Fairfield

15 mi

Level: 2.1 ft

Reading from Sat 6:45 AM · NWS gauge page

Tank Coulee

17 mi

Level: 0.8 ft

Reading from Sat 6:45 AM · NWS gauge page

Missouri River at Cascade

20 mi

Level: 6.9 ft
Flow: 3,570 cfs

Reading from Sat 6:30 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: 25°−4°

Overnight low near 25°F — not yet at drip-the-faucets cold, but worth watching if it's forecast to drop further.

Heating this week

About 61% less heating than a typical week.

This week 68Typical 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 11 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 20°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 9°5° colder than typical.

Last 7 days vs normal

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

Simms 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: 5:40–6:42 PM; Morning 7:40–8:43 AM
Blue hour: 6:42–6:54 PM; Morning 7:28–7:40 AM; first light 7:28 AM

Stars tonight? Poor

Clouds most of the night (about 56% cover).

Moon

Waxing gibbous

97% lit · growing

Today: sets 6:13 AM · rises 5:24 PM
Full moon: Oct 25
New moon: Nov 9

Looking west from Simms. The highest point on the skyline is about 9,100 ft, 45 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.