Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 66°F. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Thursday
11th Jun
66

45

6

7
Friday
12th Jun
66

45

8

7
Saturday
13th Jun
55

43

6

6
Sunday
14th Jun
64

41

8

8
Monday
15th Jun
68

45

4

6

5-day weather forecast updated at 04:04 on Thursday 11th June 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 11th June 2026

Expect mostly cloudy with light rain in Lewistown, Montana with a maximum temperature of 66°F, maximum UV of 7 (High) and 6 hours of bright sunshine. There are 2-5 mm of rainfall expected with 13% chance of some rain and a fresh breeze of 21 mph from the west.

66
°F maximum temperature
45
°F minimum temperature
mostly cloudy with light rain
6
hours of sunshine
7
UV index (High)
13
% chance of some rain
<5
mm of rainfall expected
66
°F wind chill
21
mph wind from W

Lewistown weather for Friday 12th June 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 66°F, maximum UV of 7 (High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 12 mph from the north-west.

66
°F maximum temperature
45
°F minimum temperature
broken clouds
8
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
66
°F wind chill
12
mph wind from NW

Lewistown weather for Saturday 13th June 2026

Expect mostly cloudy with rain in Lewistown, Montana with a maximum temperature of 55°F, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 5-10 mm of rainfall expected with 44% chance of some rain and a moderate breeze of 13 mph from the north-west.

55
°F maximum temperature
43
°F minimum temperature
mostly cloudy with rain
6
hours of sunshine
6
UV index (High)
44
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
13
mph wind from NW

Lewistown weather for Sunday 14th June 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 64°F, maximum UV of 8 (Very High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 9 mph from the north-west.

64
°F maximum temperature
41
°F minimum temperature
broken clouds
8
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
64
°F wind chill
9
mph wind from NW

Lewistown weather for Monday 15th June 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 68°F, maximum UV of 6 (High) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 11 mph from the north-west.