Model estimate for 12:00 PM MDT (no recent station report)

Lewistown, MT weather

Sunny and 37°3°, 11°6° colder than a typical Oct 24, freeze watch tonight, low 23°−5°.

Mostly agree

Now 37°3°

Sunny

Wind: 5 mph8 km/h; From the south-southeast. Up to 6 mph10 km/h through 12 AM
Dew point: 26°−3°; Dry, static shocks likely
UV index: 3Moderate; Moderate until 3 PM
Air quality: 30Good; Main pollutant: Ozone

Light snow now, through the next 2 hours.

From forecast models

Next 48 hours

Good hours for

High 41°5° today at 2 PM
Hard freeze tonight 8 PM–11 AM (low 21°−6°)
Below 30°−1° tonight after 8 PM
Above 30°−1° tomorrow by 10 AM
Hard freeze tomorrow night 8 PM–10 AM (low 24°−4°)

This afternoonUp to 41°5° by 2 PM · Clear
TonightDown to 23°−5° by 5 AM · freezing, low 23°−5° · Clear
Tomorrow morningUp to 33°1° by 11 AM · freezing, low 21°−6° · Clear
Tomorrow afternoonUp to 39°4° by 4 PM · Clear
Tomorrow nightDown to 25°−4° by 4 AM · freezing, low 25°−4° · Partly cloudy
Monday morningUp to 38°3° by 11 AM · freezing, low 24°−4° · 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 12p	Sunny	37°3° (likely 32°0° to 42°6°)	37°3°	0%	5 mph8 km/h from SSE, gusts 5 mph8 km/h	65%	0%	3
Sat 1p	Sunny	40°4° (likely 33°1° to 44°7°)	38°3°	0%	5 mph8 km/h from SE, gusts 5 mph9 km/h	58%	0%	3
Sat 2p	Sunny	41°5° (likely 40°4° to 46°8°)	39°4°	0%	3 mph5 km/h from SSE, gusts 5 mph9 km/h	57%	0%	3
Sat 3p	Sunny	41°5° (likely 41°5° to 47°8°)	39°4°	0%	3 mph5 km/h from SSE, gusts 5 mph8 km/h	55%	0%	2
Sat 4p	Sunny	41°5° (likely 41°5° to 48°9°)	41°5°	0%	3 mph5 km/h from SE, gusts 5 mph8 km/h	54%	0%	1
Sat 5p	Sunny	39°4° (likely 39°4° to 47°8°)	39°4°	0%	2 mph3 km/h from SE, gusts 5 mph8 km/h	61%	0%	1
Sat 6p	Clear	36°2° (likely 36°2° to 43°6°)	36°2°	0%	2 mph3 km/h from SE, gusts 3 mph5 km/h	68%	0%	0
Sat 7p	Clear	34°1° (likely 34°1° to 37°3°)	31°−1°	0%	3 mph5 km/h from SE, gusts 4 mph6 km/h	75%	0%	0
Sat 8p	Clear	29°−2° (likely 29°−2° to 36°2°)	24°−4°	0%	5 mph8 km/h from SE, gusts 5 mph7 km/h	76%	0%	0
Sat 9p	Clear	28°−2° (likely 28°−2° to 35°2°)	22°−6°	0%	6 mph10 km/h from SE, gusts 6 mph9 km/h	77%	0%	0
Sat 10p	Clear	27°−3° (likely 27°−3° to 34°1°)	22°−6°	0%	5 mph8 km/h from SE, gusts 6 mph10 km/h	77%	4%	0
Sat 11p	Clear	27°−3° (likely 27°−3° to 33°1°)	23°−5°	0%	3 mph5 km/h from ESE, gusts 6 mph9 km/h	76%	4%	0
Sun 12a	Clear	27°−3° (likely 27°−3° to 34°1°)	23°−5°	0%	3 mph5 km/h from SE, gusts 6 mph9 km/h	73%	5%	0
Sun 1a	Clear	27°−3° (likely 27°−3° to 35°2°)	27°−3°	0%	2 mph3 km/h from ESE, gusts 5 mph8 km/h	74%	3%	0
Sun 2a	Clear	26°−3° (likely 26°−3° to 34°1°)	26°−3°	0%	2 mph3 km/h from ESE, gusts 3 mph4 km/h	75%	1%	0
Sun 3a	Clear	26°−3° (likely 26°−3° to 35°2°)	26°−3°	0%	2 mph3 km/h from ESE, gusts 3 mph5 km/h	74%	0%	0
Sun 4a	Clear	25°−4° (likely 25°−4° to 34°1°)	25°−4°	0%	2 mph3 km/h from ESE, gusts 3 mph5 km/h	75%	0%	0
Sun 5a	Clear	23°−5° (likely 23°−5° to 33°1°)	23°−5°	0%	2 mph3 km/h from ESE, gusts 4 mph7 km/h	75%	1%	0
Sun 6a	Clear	23°−5° (likely 23°−5° to 32°0°)	23°−5°	0%	2 mph3 km/h from ESE, gusts 7 mph11 km/h	76%	7%	0
Sun 7a	Clear	22°−6° (likely 22°−6° to 32°0°)	22°−6°	0%	2 mph3 km/h from ESE, gusts 4 mph7 km/h	79%	14%	0
Sun 8a	Sunny	21°−6° (likely 21°−6° to 32°0°)	21°−6°	0%	2 mph3 km/h from SE, gusts 4 mph6 km/h	77%	17%	0
Sun 9a	Sunny	24°−4° (likely 24°−4° to 33°1°)	20°−7°	0%	2 mph3 km/h from ESE, gusts 8 mph12 km/h	72%	17%	0
Sun 10a	Sunny	30°−1° (likely 28°−2° to 35°2°)	26°−3°	0%	2 mph3 km/h from E, gusts 11 mph18 km/h	74%	13%	1
Sun 11a	Sunny	33°1° (likely 33°1° to 37°3°)	30°−1°	0%	3 mph5 km/h from E, gusts 14 mph22 km/h	72%	2%	2
Sun 12p	Sunny	35°2° (likely 35°2° to 39°4°)	29°−2°	0%	6 mph10 km/h from E, gusts 14 mph22 km/h	69%	0%	3
Sun 1p	Sunny	37°3° (likely 37°3° to 40°4°)	32°0°	0%	8 mph13 km/h from E, gusts 16 mph25 km/h	63%	0%	4
Sun 2p	Sunny	38°3° (likely 38°3° to 42°6°)	33°1°	0%	9 mph14 km/h from E, gusts 17 mph27 km/h	64%	0%	4
Sun 3p	Sunny	38°3° (likely 38°3° to 43°6°)	31°−1°	0%	10 mph16 km/h from E, gusts 18 mph29 km/h	64%	0%	3
Sun 4p	Sunny	39°4° (likely 39°4° to 43°6°)	32°0°	0%	12 mph19 km/h from E, gusts 19 mph31 km/h	64%	0%	2
Sun 5p	Sunny	37°3° (likely 37°3° to 42°6°)	30°−1°	0%	13 mph21 km/h from E, gusts 21 mph34 km/h	68%	0%	1
Sun 6p	Clear	35°2° (likely 35°2° to 39°4°)	27°−3°	0%	12 mph19 km/h from ESE, gusts 21 mph34 km/h	74%	0%	0
Sun 7p	Clear	33°1° (likely 33°1° to 37°3°)	24°−4°	0%	12 mph19 km/h from ESE, gusts 14 mph23 km/h	77%	0%	0
Sun 8p	Clear	30°−1° (likely 30°−1° to 36°2°)	20°−7°	0%	12 mph19 km/h from ESE, gusts 12 mph20 km/h	78%	1%	0
Sun 9p	Clear	29°−2° (likely 29°−2° to 35°2°)	20°−7°	0%	12 mph19 km/h from ESE, gusts 11 mph17 km/h	78%	5%	0
Sun 10p	Clear	29°−2° (likely 29°−2° to 34°1°)	20°−7°	0%	12 mph19 km/h from ESE, gusts 11 mph18 km/h	77%	9%	0
Sun 11p	Clear	29°−2° (likely 29°−2° to 33°1°)	20°−7°	0%	12 mph19 km/h from ESE, gusts 12 mph19 km/h	75%	33%	0
Mon 12a	Clear	29°−2° (likely 29°−2° to 32°0°)	20°−7°	0%	9 mph14 km/h from ESE, gusts 12 mph20 km/h	74%	36%	0
Mon 1a	Clear	28°−2° (likely 28°−2° to 33°1°)	19°−7°	0%	9 mph14 km/h from ESE, gusts 13 mph21 km/h	76%	40%	0
Mon 2a	Mostly clear	27°−3° (likely 27°−3° to 33°1°)	18°−8°	0%	9 mph14 km/h from ESE, gusts 15 mph23 km/h	79%	45%	0
Mon 3a	Partly cloudy	26°−3° (likely 26°−3° to 32°0°)	18°−8°	0%	8 mph13 km/h from SE, gusts 15 mph24 km/h	82%	48%	0
Mon 4a	Cloudy	25°−4° (likely 25°−4° to 32°0°)	16°−9°	0%	8 mph13 km/h from SE, gusts 14 mph22 km/h	83%	53%	0
Mon 5a	Cloudy	25°−4° (likely 25°−4° to 31°−1°)	16°−9°	0%	8 mph13 km/h from SE, gusts 12 mph19 km/h	84%	49%	0
Mon 6a	Partly cloudy	24°−4° (likely 24°−4° to 32°0°)	16°−9°	0%	7 mph11 km/h from SE, gusts 12 mph19 km/h	84%	32%	0
Mon 7a	Clear	25°−4° (likely 25°−4° to 31°−1°)	17°−8°	0%	7 mph11 km/h from SE, gusts 6 mph9 km/h	84%	9%	0
Mon 8a	Sunny	26°−3° (likely 25°−4° to 31°−1°)	18°−8°	0%	7 mph11 km/h from SE, gusts 6 mph9 km/h	83%	6%	0
Mon 9a	Sunny	29°−2° (likely 28°−2° to 33°1°)	23°−5°	0%	6 mph10 km/h from SE, gusts 6 mph9 km/h	81%	14%	0
Mon 10a	Sunny	33°1° (likely 33°1° to 38°3°)	28°−2°	0%	6 mph10 km/h from SE, gusts 8 mph12 km/h	79%	14%	1
Mon 11a	Partly sunny	38°3° (likely 38°3° to 42°6°)	34°1°	0%	6 mph10 km/h from SE, gusts 9 mph15 km/h	77%	15%	2

Days ahead

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

Today, Oct 24. Sunny. High 41°5°, low 20°−7°. Typical 52°11° / 28°−2°. Dry. Mostly agree.
1. Afternoon
  noon–6 PM
  Sunny, 41°5°
  Dry
2. Evening
  6 PM–midnight
  Clear, 29°−2°
  Dry
3. Overnight
  midnight–6 AM
  Clear, 23°−5°
  Dry
Official NWS forecast
Today: Sunny, with a high near 41. South southeast wind around 5 mph.
Tonight: Mostly clear. Low around 20, with temperatures rising to around 23 overnight. Southeast wind 2 to 6 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
41°5°–48°9°
Low, likely
20°−7°–24°−4°
Typical high / low
52°11° / 28°−2°
Wind
16 mph25 km/h, gusts 29 mph46 km/h
UV peak
4
Tomorrow, Oct 25. Mostly sunny. High 39°4°, low 23°−5°. Typical 52°11° / 27°−3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 21°−6°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 39°4°
  Dry
3. Evening
  6 PM–midnight
  Clear, 30°−1°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 25°−4°
  Dry
Official NWS forecast
Day: Sunny, with a high near 39. East southeast wind 2 to 13 mph, with gusts as high as 22 mph.
Night: Mostly clear, with a low around 23. East southeast wind 8 to 12 mph, with gusts as high as 22 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
39°4°–43°6°
Low, likely
23°−5°–32°0°
Typical high / low
52°11° / 27°−3°
Wind
14 mph23 km/h, gusts 24 mph38 km/h
UV peak
4
Monday, Oct 26. Partly sunny. High 45°7°, low 27°−3°. Typical 51°11° / 27°−3°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 26°−3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 50°10°
  Dry
3. Evening
  6 PM–midnight
  Clear, 39°4°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 33°1°
  30% chance · 0.01 in0.3 mm
Official NWS forecast
Day: Mostly sunny, with a high near 45. Southeast wind around 7 mph.
Night: Partly cloudy, with a low around 27. Southeast wind 5 to 10 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
45°7°–53°12°
Low, likely
26°−3°–30°−1°
Typical high / low
51°11° / 27°−3°
Wind
13 mph21 km/h, gusts 22 mph36 km/h
UV peak
4
Tuesday, Oct 27. Rain. High 45°7°, low 26°−3°. Typical 51°11° / 27°−3°. Rain 0.18 in4.6 mm, 40% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 33°1°
  40% chance · 0.03 in0.8 mm
2. Afternoon
  noon–6 PM
  Snow, 45°7°
  40% chance · 0.07 in1.8 mm
3. Evening
  6 PM–midnight
  Snow, 41°5°
  30% chance · 0.08 in2.1 mm
4. Overnight
  midnight–6 AM
  Clear, 36°2°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: A chance of rain. Partly sunny, with a high near 45. Southwest wind 3 to 9 mph, with gusts as high as 18 mph.
Night: A chance of rain before 3am, then a chance of snow. Mostly cloudy, with a low around 26. West wind 7 to 12 mph, with gusts as high as 21 mph. Little or no snow accumulation expected.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
43°6°–50°10°
Low, likely
26°−3°–34°1°
Typical high / low
51°11° / 27°−3°
Wind
19 mph30 km/h, gusts 35 mph56 km/h
UV peak
2
Wednesday, Oct 28. Snow. High 43°6°, low 22°−6°. Typical 50°10° / 26°−3°. Snow 0.03 in0.8 mm, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 35°2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 50°10°
  Dry
3. Evening
  6 PM–midnight
  Clear, 39°4°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 33°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 slight chance of snow. Mostly cloudy, with a low around 22.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
43°6°–52°11°
Low, likely
22°−6°–37°3°
Typical high / low
50°10° / 26°−3°
Wind
16 mph26 km/h, gusts 32 mph51 km/h
UV peak
3
Thursday, Oct 29. Snow. High 40°4°, low 23°−5°. Typical 50°10° / 26°−3°. Snow 0–1 in0–3 cm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 33°0°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 46°8°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 35°2°
  20% chance · 0.1 in0.4 cm
4. Overnight
  midnight–6 AM
  Cloudy, 30°−1°
  20% chance · 0.1 in0.3 cm
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 40.
Night: A slight chance of snow before midnight. Mostly cloudy, with a low around 23.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
40°4°–51°11°
Low, likely
23°−5°–33°1°
Typical high / low
50°10° / 26°−3°
Wind
11 mph18 km/h
UV peak
3
Friday, Oct 30. Snow. High 45°7°, low 26°−3°. Typical 50°10° / 26°−3°. Snow 0–1 in0–3 cm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 30°−1°
  20% chance
2. Afternoon
  noon–6 PM
  Cloudy, 38°3°
  20% chance
3. Evening
  6 PM–midnight
  Cloudy, 32°0°
  20% chance · 0.03 in0.7 mm
4. Overnight
  midnight–6 AM
  Cloudy, 28°−2°
  20% chance
Hours this far out come from computer models only.
Official NWS forecast
Day: A slight chance of snow before noon, then a slight chance of rain and snow. Partly sunny, with a high near 45.
Night: A slight chance of rain and snow. Mostly cloudy, with a low around 26.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
34°1°–45°7°
Low, likely
24°−4°–31°−1°
Typical high / low
50°10° / 26°−3°
Wind
11 mph18 km/h, gusts 19 mph30 km/h
UV peak
2
Saturday, Oct 31. Snow. High 38°3°, low 27°−3°. Typical 49°9° / 25°−4°. Snow 0–1 in0–3 cm, 20% chance. Mostly agree.
1. Morning
  6 AM–noon
  Snow, 29°−2°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 35°2°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 31°−1°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 27°−3°
  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.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
36°2°–40°4°
Low, likely
19°−7°–31°−1°
Typical high / low
49°9° / 25°−4°
Wind
15 mph25 km/h
UV peak
3
Sunday, Nov 1. Cloudy. High 44°7°, low 27°−3°. Typical 49°9° / 25°−4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Cloudy, 32°0°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 44°7°
  Dry
3. Evening
  6 PM–midnight
  Clear, 36°2°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 34°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
40°4°–47°8°
Low, likely
20°−7°–31°−1°
Typical high / low
49°9° / 25°−4°
Wind
15 mph24 km/h, gusts 31 mph49 km/h
UV peak
3
Monday, Nov 2. Drizzle. High 48°9°, low 33°1°. Typical 48°9° / 25°−4°. Rain 0.08 in2 mm, 10% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Mostly sunny, 40°4°
  Dry
2. Afternoon
  noon–6 PM
  Partly sunny, 48°9°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 38°3°
  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
29°−2°–35°2°
Typical high / low
48°9° / 25°−4°
Wind
25 mph40 km/h, gusts 52 mph84 km/h
UV peak
3

10 days15 days30 days

The outlook

Today
Dry, high 41°, low 20°.
Tomorrow
Dry, high 39°, low 23°.
Monday
Dry, high 45°, 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

Big Spring Creek (MT) near Lewistown at R&B Trading Post

2.5 mi

Level: 3.8 ft

Reading from Sat 10:30 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: 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 63% less heating than a typical week.

This week 68Typical 184

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 1 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 26°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?

Lewistown Airport · official normals 1991–2020 · records 1896–2026

Oct 24, today vs a typical year

Today’s expected high is 11°6° colder than typical.

Last 7 days vs normal

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

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

Sun & moon

Sun

Daylight: 10 h 25 min; Losing 3 min 8 s a day; shortest Dec 21, 1 h 55 min less
Golden hour: 5:31–6:33 PM; Morning 7:29–8:32 AM
Blue hour: 6:33–6:45 PM; Morning 7:17–7:29 AM; first light 7:17 AM

Stars tonight? Fair

Clear 6:45 PM–7:19 AM, but the moon is 99% lit and up.

Moon

Waxing gibbous

97% lit · growing

Today: sets 6:02 AM · rises 5:15 PM
Full moon: Oct 25
New moon: Nov 9

Looking south from Lewistown. The highest point on the skyline is about 8,700 ft, 21 mi away.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.