Roundup, MT Weather Forecast & Alerts

Current conditions, 5-day forecast, and active NWS weather alerts for Roundup, MT.

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Current Conditions — Roundup, MT

N BAR RANCH (KMVH)

Mostly Clear

35.6 F
Humidity:60%
Wind Speed: G 46.1 mph
Barometer:29.78 in
Dewpoint:23.0 F
Visibility:10.00 mi
Precip:--
Heat Index:NA
Wind Chill:NA
Apr 23 2026, 12:35 PM MDT
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5-Day Forecast — Roundup, MT

Thursday

High 48 °F
Snow Likely
Thursday
Night
Low 28 °F
Chance of Snow
Friday

High 44 °F
Forecast Missing
Friday
Night
Low 24 °F
Forecast Missing
Saturday

High 46 °F
Forecast Missing
Saturday
Night
Low 26 °F
Forecast Missing
Sunday

High 44 °F
Forecast Missing
Sunday
Night
Low 28 °F
Forecast Missing
Monday

High 50 °F
Forecast Missing

Detailed Forecast — Roundup, MT

Thursday
Snow Likely. High near 48°F. Wind 16 to 25 mph, with gusts as high as 36 mph.
Thursday Night
Chance of Snow. Low around 28°F. Wind 7 to 14 mph, with gusts as high as 24 mph.
Friday
Chance of Snow. High near 44°F. Wind 9 to 17 mph, with gusts as high as 28 mph.
Friday Night
Forecast Missing. Low around 24°F. Wind 6 to 15 mph, with gusts as high as 26 mph.
Saturday
Forecast Missing. High near 46°F. Wind 8 to 10 mph, with gusts as high as 20 mph.
Saturday Night
Forecast Missing. Low around 26°F. Wind around 6 mph, with gusts as high as 12 mph.
Sunday
Forecast Missing. High near 44°F. Wind 9 to 10 mph, with gusts as high as 17 mph.
Sunday Night
Forecast Missing. Low around 28°F. Wind 1 to 5 mph, with gusts as high as 8 mph.
Monday
Forecast Missing. High near 50°F. Wind 2 to 3 mph, with gusts as high as 7 mph.
Monday Night
Forecast Missing. Low around 32°F. Wind around 3 mph, with gusts as high as 8 mph.
Tuesday
Forecast Missing. High near 62°F. Wind 8 to 9 mph, with gusts as high as 15 mph.
Tuesday Night
Forecast Missing. Low around 37°F. Wind 2 to 3 mph, with gusts as high as 7 mph.
Wednesday
Forecast Missing. High near 59°F. Wind 7 to 10 mph, with gusts as high as 18 mph.
MT Radar
Current Radar • MT
Day 1 Outlook • April 23, 2026

Observation History — Roundup, MT

Time Wind
(mph)		 Vis
(mi)		 Weather Precip (in) Temperature (F) Relative
Humidity		 Wind
Chill
(F)		 Heat
Index
(F)		 Pressure
Air Dwpt altimeter
(in)		 sea level
(mb)
12:35 PM MDT G 46.1 10.00 Mostly Clear -- 35.6 23.0 60% NA NA 29.78 1008.5
12:15 PM MDT G 36.9 10.00 Mostly Clear -- 35.6 23.0 60% NA NA 29.78 1008.5
11:55 AM MDT 20.8 G 33.3 10.00 Partly Cloudy and Windy -- 35.6 23.0 60% 24.4 NA 29.81 1009.2
11:35 AM MDT NW 25.3 G 32.2 10.00 Mostly Cloudy and Windy -- 33.8 24.8 69% 21.0 NA 29.79 1008.8
11:15 AM MDT 27.7 G 35.8 10.00 Mostly Cloudy and Breezy -- 33.8 26.6 75% 20.5 NA 29.78 1008.5
10:55 AM MDT 28.9 G 38.0 10.00 Cloudy and Breezy -- 32.0 24.8 74% 17.8 NA 29.78 1008.5
10:35 AM MDT 23.0 G 36.9 9.00 Mostly Cloudy and Windy -- 33.8 26.6 75% 21.6 NA 29.79 1008.8
10:15 AM MDT G 49.4 9.00 Mostly Cloudy -- 33.8 26.6 75% NA NA 29.76 1007.8
09:55 AM MDT G 39.1 10.00 Mostly Cloudy -- 32.0 26.6 80% NA NA 29.75 1007.5
09:35 AM MDT NW 30.0 G 41.4 10.00 Mostly Cloudy and Breezy -- 32.0 26.6 80% 17.6 NA 29.75 1007.5
09:15 AM MDT G 48.3 10.00 Mostly Cloudy -- 30.2 24.8 80% NA NA 29.75 1007.5
08:55 AM MDT G 54.1 3.00 Mostly Cloudy -- 30.2 24.8 80% NA NA 29.75 1007.5
08:35 AM MDT G 48.3 3.00 Cloudy -- 30.2 26.6 86% NA NA 29.73 1006.8
08:15 AM MDT NW 23.0 G 36.9 7.00 Cloudy and Windy -- 30.2 28.4 93% 16.7 NA 29.74 1007.1
07:55 AM MDT NW 25.3 G 33.3 10.00 Cloudy and Windy -- 30.2 28.4 93% 16.2 NA 29.73 1006.8
07:35 AM MDT 26.4 G 33.3 9.00 Cloudy and Breezy -- 32.0 28.4 86% 18.3 NA 29.70 1005.8
07:15 AM MDT NW 28.9 G 43.8 7.00 Mostly Cloudy and Breezy -- 30.2 28.4 93% 15.4 NA 29.68 1005.1
06:55 AM MDT NW 25.3 G 39.1 9.00 Cloudy and Windy -- 30.2 28.4 93% 16.2 NA 29.68 1005.1
06:35 AM MDT G 40.3 6.00 Cloudy -- 30.2 28.4 93% NA NA 29.68 1004.8
06:15 AM MDT NW 32.2 G 42.5 5.00 Light Rain -- 32.0 28.4 86% 17.2 NA 29.66 1004.4
05:55 AM MDT G 45.0 5.00 Rain -- 33.8 30.2 86% NA NA 29.63 1003.4
05:35 AM MDT NW 32.2 G 42.5 5.00 Light Rain -- 33.8 30.2 86% 19.6 NA 29.62 1003.1
05:15 AM MDT 25.3 G 34.4 7.00 Rain -- 33.8 30.2 86% 21.0 NA 29.62 1003.1
04:55 AM MDT NW 26.4 G 39.1 10.00 Cloudy and Breezy -- 33.8 32.0 93% 20.8 NA 29.62 1003.1

Regional Weather Observation

N BAR RANCH (KMVH)

Mostly Clear
35.6 F

(KLWT)


F

BILLINGS (KBIL)

Mostly Clear
48.2 F

ECHO (K1EM)

Cloudy
32.0 F

DELTA (K1DM)

Light Rain
32.0 F

BIG TIMBER (K6S0)

Mostly Clear
NULL F
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