Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 68°F. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Wednesday
21st Oct
68

37

10

3
Thursday
22nd Oct
73

46

9

3
Friday
23rd Oct
55

39

0

1
Saturday
24th Oct
46

32

8

3
Sunday
25th Oct
46

23

0

2

5-day weather forecast updated at 04:02 on Wednesday 21st October 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 Wednesday 21st October 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 68°F, maximum UV of 3 (Moderate) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 9 mph from the south.

68
°F maximum temperature
37
°F minimum temperature
scattered clouds
10
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
68
°F wind chill
9
mph wind from S

Lewistown weather for Thursday 22nd October 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 73°F, maximum UV of 3 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 mph from the south.

73
°F maximum temperature
46
°F minimum temperature
scattered clouds
9
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
73
°F wind chill
7
mph wind from S

Lewistown weather for Friday 23rd October 2026

Expect mostly cloudy with rain in Lewistown, Montana with a maximum temperature of 55°F, maximum UV of 1 (Low) and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 99% chance of some rain and a fresh breeze of 22 mph from the west.

55
°F maximum temperature
39
°F minimum temperature
mostly cloudy with rain
0
hours of sunshine
1
UV index (Low)
99
% chance of some rain
<20
mm of rainfall expected
55
°F wind chill
22
mph wind from W

Lewistown weather for Saturday 24th October 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 46°F, maximum UV of 3 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 19 mph from the west.

46
°F maximum temperature
32
°F minimum temperature
scattered clouds
8
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
39
°F wind chill
19
mph wind from W

Lewistown weather for Sunday 25th October 2026

Expect cloudy with sleet or snow in Lewistown, Montana with a maximum temperature of 46°F, maximum UV of 2 (Low) and no hours of bright sunshine. There are 0-2 mm of sleet/snow expected with 30% chance of some sleet or snow and a light breeze of 6 mph from the east.