Hourly Weather Forecast - Lewistown, MT

12 AM
28°F
0%
11mph
SW
Partly Cloudy
Humidity
45%
Feels like
18°F
Dew Point
9°F
1 AM
28°F
0%
10mph
SSW
Partly Cloudy
Humidity
43%
Feels like
19°F
Dew Point
9°F
2 AM
29°F
0%
10mph
SSW
Partly Cloudy
Humidity
41%
Feels like
20°F
Dew Point
8°F
3 AM
29°F
0%
10mph
SSW
Mostly Clear
Humidity
41%
Feels like
20°F
Dew Point
8°F
4 AM
29°F
0%
10mph
SSW
Partly Cloudy
Humidity
42%
Feels like
20°F
Dew Point
9°F
5 AM
30°F
0%
10mph
SSW
Partly Cloudy
Humidity
42%
Feels like
21°F
Dew Point
10°F
6 AM
31°F
0%
10mph
SSW
Mostly Cloudy
Humidity
40%
Feels like
23°F
Dew Point
10°F
7 AM
32°F
0%
9mph
SSW
Mostly Cloudy
Humidity
41%
Feels like
24°F
Dew Point
11°F
8 AM
33°F
0%
9mph
SSW
Cloudy
Humidity
45%
Feels like
25°F
Dew Point
14°F
8:00 AM
9 AM
34°F
0%
9mph
S
Cloudy
Humidity
47%
Feels like
27°F
Dew Point
16°F
10 AM
36°F
10%
8mph
S
Mostly Cloudy
Humidity
47%
Feels like
30°F
Dew Point
18°F
11 AM
38°F
10%
8mph
S
Mostly Cloudy
Humidity
45%
Feels like
33°F
Dew Point
19°F
12 PM
40°F
20%
8mph
SSE
Mostly Cloudy
Humidity
44%
Feels like
35°F
Dew Point
20°F
1 PM
42°F
30%
8mph
SE
30% Chance of Light Rain
Humidity
44%
Feels like
37°F
Dew Point
21°F
2 PM
41°F
40%
8mph
SE
40% Chance of Light Rain
Humidity
50%
Feels like
36°F
Dew Point
24°F
3 PM
39°F
30%
8mph
SE
30% Chance of Light Rain
Humidity
60%
Feels like
34°F
Dew Point
27°F
4 PM
37°F
30%
7mph
SSE
30% Chance of Light Rain
Humidity
73%
Feels like
31°F
Dew Point
29°F
4:30 PM
5 PM
34°F
30%
7mph
SSE
30% Chance of Light Rain
Humidity
86%
Feels like
28°F
Dew Point
31°F
6 PM
33°F
30%
7mph
SSE
30% Chance of Light Rain
Humidity
94%
Feels like
27°F
Dew Point
31°F
7 PM
32°F
30%
6mph
S
30% Chance of Snow
Humidity
95%
Feels like
26°F
Dew Point
31°F
8 PM
32°F
30%
6mph
S
30% Chance of Flurries
Humidity
100%
Feels like
26°F
Dew Point
32°F
9 PM
32°F
30%
7mph
SSE
30% Chance of Flurries
Humidity
100%
Feels like
25°F
Dew Point
32°F
10 PM
32°F
10%
7mph
SSE
Foggy
Humidity
100%
Feels like
25°F
Dew Point
32°F
11 PM
32°F
10%
8mph
SSE
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

Sunday's Weather Outlook

Sunday's 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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