Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 81°F. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Thursday
24th Sep
81

52

12

5
Friday
25th Sep
84

54

11

5
Saturday
26th Sep
66

46

11

4
Sunday
27th Sep
63

41

2

4
Monday
28th Sep
63

43

0

5

5-day weather forecast updated at 04:03 on Thursday 24th September 2026 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 Thursday 24th September 2026

Expect clear skies in Lewistown, Montana with a maximum temperature of 81°F, low levels of heat & humidity, maximum UV of 5 (Moderate) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 11 mph from the south-east.

81
°F maximum temperature
52
°F minimum temperature
clear skies
12
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
L
low heat & humidity
11
mph wind from SE

Lewistown weather for Friday 25th September 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 84°F, low levels of heat & humidity, maximum UV of 5 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 12 mph from the south.

84
°F maximum temperature
54
°F minimum temperature
scattered clouds
11
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
L
low heat & humidity
12
mph wind from S

Lewistown weather for Saturday 26th September 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 66°F, maximum UV of 4 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 12 mph from the west.

66
°F maximum temperature
46
°F minimum temperature
scattered clouds
11
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
66
°F wind chill
12
mph wind from W

Lewistown weather for Sunday 27th September 2026

Expect mostly cloudy with light rain in Lewistown, Montana with a maximum temperature of 63°F, maximum UV of 4 (Moderate) and 2 hours of bright sunshine. There are 0-2 mm of rainfall expected with 37% chance of some rain and a light breeze of 6 mph from the east.

63
°F maximum temperature
41
°F minimum temperature
mostly cloudy with light rain
2
hours of sunshine
4
UV index (Moderate)
37
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
6
mph wind from E

Lewistown weather for Monday 28th September 2026

Expect mostly cloudy with light rain in Lewistown, Montana with a maximum temperature of 63°F, maximum UV of 5 (Moderate) and no hours of bright sunshine. There are 0-2 mm of rainfall expected with 22% chance of some rain and a light breeze of 7 mph from the north-west.