Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 64°F. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Thursday
7th May
64

41

8

6
Friday
8th May
72

46

5

6
Saturday
9th May
61

41

3

2
Sunday
10th May
77

41

11

6
Monday
11th May
73

48

15

7

5-day weather forecast updated at 04:02 on Friday 8th May 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 7th May 2026

Expect sunshine and showers in Lewistown, Montana with a maximum temperature of 64°F, maximum UV of 6 (High) and 8 hours of bright sunshine. There are 0-2 mm of rainfall expected with 23% chance of some rain and a moderate breeze of 14 mph from the north-west.

64
°F maximum temperature
41
°F minimum temperature
sunshine and showers
8
hours of sunshine
6
UV index (High)
23
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
14
mph wind from NW

Lewistown weather for Friday 8th May 2026

Expect mostly cloudy with light rain in Lewistown, Montana with a maximum temperature of 72°F, maximum UV of 6 (High) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 40% chance of some rain and a moderate breeze of 14 mph from the north-west.

72
°F maximum temperature
46
°F minimum temperature
mostly cloudy with light rain
5
hours of sunshine
6
UV index (High)
40
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
14
mph wind from NW

Lewistown weather for Saturday 9th May 2026

Expect mostly cloudy with light rain in Lewistown, Montana with a maximum temperature of 61°F, maximum UV of 2 (Low) and 3 hours of bright sunshine. There are 2-5 mm of rainfall expected with 72% chance of some rain and a gentle breeze of 9 mph from the north-west.

61
°F maximum temperature
41
°F minimum temperature
mostly cloudy with light rain
3
hours of sunshine
2
UV index (Low)
72
% chance of some rain
<5
mm of rainfall expected
61
°F wind chill
9
mph wind from NW

Lewistown weather for Sunday 10th May 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 77°F, maximum UV of 6 (High) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 6 mph from the south.

77
°F maximum temperature
41
°F minimum temperature
scattered clouds
11
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
77
°F wind chill
6
mph wind from S

Lewistown weather for Monday 11th May 2026

Expect clear skies in Lewistown, Montana with a maximum temperature of 73°F, maximum UV of 7 (High) and 15 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 19 mph from the north-west.