Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 72°F. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Tuesday
29th Sep
72

45

9

5
Wednesday
30th Sep
59

43

6

3
Thursday
1st Oct
63

39

4

4
Friday
2nd Oct
68

45

11

4
Saturday
3rd Oct
63

46

6

5

5-day weather forecast updated at 04:03 on Tuesday 29th 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 Tuesday 29th September 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 72°F, maximum UV of 5 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 17 mph from the west.

72
°F maximum temperature
45
°F minimum temperature
scattered clouds
9
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
72
°F wind chill
17
mph wind from W

Lewistown weather for Wednesday 30th September 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 59°F, maximum UV of 3 (Moderate) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 18 mph from the north-west.

59
°F maximum temperature
43
°F minimum temperature
broken clouds
6
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
18
mph wind from NW

Lewistown weather for Thursday 1st October 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 63°F, maximum UV of 4 (Moderate) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 mph from the south-east.

63
°F maximum temperature
39
°F minimum temperature
broken clouds
4
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
7
mph wind from SE

Lewistown weather for Friday 2nd October 2026

Expect sunshine and showers in Lewistown, Montana with a maximum temperature of 68°F, maximum UV of 4 (Moderate) and 11 hours of bright sunshine. There are 0-2 mm of rainfall expected with 21% chance of some rain and a gentle breeze of 8 mph from the north-west.

68
°F maximum temperature
45
°F minimum temperature
sunshine and showers
11
hours of sunshine
4
UV index (Moderate)
21
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
8
mph wind from NW

Lewistown weather for Saturday 3rd October 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 63°F, maximum UV of 5 (Moderate) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 8 mph from the south-east.