Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 36°F. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Saturday
13th Dec
36

5

2

1
Sunday
14th Dec
46

37

4

1
Monday
15th Dec
48

41

0

1
Tuesday
16th Dec
46

36

4

1
Wednesday
17th Dec
41

34

4

1

5-day weather forecast updated at 04:05 on Friday 12th December 2025 GMT

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The 5-day weather forecast for Montana (Lewistown) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Lewistown weather forecast by day

Below are the detailed weather forecasts for Lewistown for the next 5 days.

Lewistown weather for Saturday 13th December 2025

Expect mostly cloudy with light snow in Lewistown, Montana with a maximum temperature of 36°F, maximum UV of 1 (Low) and 2 hours of bright sunshine. There are 0-2 cm of snow expected with 15% chance of some snow and a gentle breeze of 12 mph from the west.

36
°F maximum temperature
5
°F minimum temperature
mostly cloudy with light snow
2
hours of sunshine
1
UV index (Low)
15
% chance of some snow
<2
cm of snow expected
27
°F wind chill
12
mph wind from W

Lewistown weather for Sunday 14th December 2025

Expect broken clouds in Lewistown, Montana with a maximum temperature of 46°F, maximum UV of 1 (Low) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 14 mph from the south-west.

46
°F maximum temperature
37
°F minimum temperature
broken clouds
4
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
39
°F wind chill
14
mph wind from SW

Lewistown weather for Monday 15th December 2025

Expect broken clouds in Lewistown, Montana with a maximum temperature of 48°F, maximum UV of 1 (Low) and no hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 16 mph from the south-west.

48
°F maximum temperature
41
°F minimum temperature
broken clouds
0
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
43
°F wind chill
16
mph wind from SW

Lewistown weather for Tuesday 16th December 2025

Expect sunshine and showers in Lewistown, Montana with a maximum temperature of 46°F, maximum UV of 1 (Low) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 30% chance of some rain and a fresh breeze of 21 mph from the south-west.

46
°F maximum temperature
36
°F minimum temperature
sunshine and showers
4
hours of sunshine
1
UV index (Low)
30
% chance of some rain
<2
mm of rainfall expected
37
°F wind chill
21
mph wind from SW

Lewistown weather for Wednesday 17th December 2025

Expect sunshine and showers in Lewistown, Montana with a maximum temperature of 41°F, maximum UV of 1 (Low) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 49% chance of some rain and a fresh breeze of 23 mph from the west.