Hourly Weather Forecast - Lewistown, MT

12 AM
26°F
0%
12mph
SW
Cloudy
Humidity
52%
Feels like
15°F
Dew Point
11°F
1 AM
27°F
0%
11mph
SSW
Mostly Cloudy
Humidity
50%
Feels like
17°F
Dew Point
11°F
2 AM
28°F
0%
11mph
SSW
Partly Cloudy
Humidity
49%
Feels like
18°F
Dew Point
11°F
3 AM
28°F
0%
11mph
SSW
Partly Cloudy
Humidity
46%
Feels like
19°F
Dew Point
10°F
4 AM
29°F
0%
11mph
SSW
Mostly Clear
Humidity
45%
Feels like
20°F
Dew Point
10°F
5 AM
29°F
0%
11mph
SSW
Mostly Clear
Humidity
44%
Feels like
20°F
Dew Point
11°F
6 AM
30°F
0%
10mph
SSW
Partly Cloudy
Humidity
42%
Feels like
21°F
Dew Point
10°F
7 AM
31°F
0%
9mph
SSW
Partly Cloudy
Humidity
41%
Feels like
23°F
Dew Point
10°F
8 AM
32°F
0%
9mph
SSW
Cloudy
Humidity
41%
Feels like
25°F
Dew Point
11°F
8:00 AM
9 AM
34°F
0%
9mph
S
Cloudy
Humidity
42%
Feels like
27°F
Dew Point
14°F
10 AM
36°F
0%
8mph
S
Cloudy
Humidity
41%
Feels like
30°F
Dew Point
15°F
11 AM
39°F
10%
8mph
S
Cloudy
Humidity
40%
Feels like
33°F
Dew Point
17°F
12 PM
40°F
10%
7mph
SSE
Cloudy
Humidity
38%
Feels like
35°F
Dew Point
17°F
1 PM
41°F
20%
8mph
SSE
Cloudy
Humidity
40%
Feels like
36°F
Dew Point
19°F
2 PM
41°F
30%
7mph
SE
30% Chance of Snow
Humidity
45%
Feels like
36°F
Dew Point
21°F
3 PM
39°F
30%
8mph
SSE
30% Chance of Heavy Snow
Humidity
49%
Feels like
34°F
Dew Point
22°F
4 PM
37°F
30%
8mph
SSE
30% Chance of Heavy Snow
Humidity
57%
Feels like
32°F
Dew Point
24°F
4:30 PM
5 PM
36°F
30%
7mph
SSE
30% Chance of Snow
Humidity
67%
Feels like
30°F
Dew Point
26°F
6 PM
35°F
10%
7mph
S
Cloudy
Humidity
73%
Feels like
28°F
Dew Point
27°F
7 PM
33°F
10%
7mph
S
Cloudy
Humidity
79%
Feels like
27°F
Dew Point
28°F
8 PM
33°F
10%
7mph
S
Cloudy
Humidity
87%
Feels like
26°F
Dew Point
29°F
9 PM
32°F
20%
7mph
S
Cloudy
Humidity
93%
Feels like
25°F
Dew Point
30°F
10 PM
32°F
20%
7mph
S
Cloudy
Humidity
97%
Feels like
25°F
Dew Point
31°F
11 PM
32°F
20%
7mph
S
Cloudy
Humidity
95%
Feels like
25°F
Dew Point
31°F

Rain And Snow Totals Through Monday

Atmospheric River Takes Aim For Northern California

The plume of abundant moisture impacting the Northwest the last several days will focus more on Northern California later today into Monday bringing heavy rainfall and mountain snow.

NOAA, NCDC

White Christmas? What Are The Odds

Weekend Weather Outlook

Weekend Weather Outlook

Cold weather

During Extreme Cold: Watch for Frostbite!

Flu Update Valid For Week Ending December 13, 2025

Weekly Flu Update: Flu Spreading Hard Across U.S.

Watch vs. Warning

Flash Flood Watch and Warning Defined

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