Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 88°F. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Wednesday
29th Jul
88

59

12

7
Thursday
30th Jul
88

61

10

6
Friday
31st Jul
91

59

14

7
Saturday
1st Aug
99

61

12

7
Sunday
2nd Aug
82

57

12

7

5-day weather forecast updated at 04:03 on Wednesday 29th July 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 29th July 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 88°F, moderate levels of heat & humidity, maximum UV of 7 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 5 mph from the south.

88
°F maximum temperature
59
°F minimum temperature
scattered clouds
12
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
M
moderate heat & humidity
5
mph wind from S

Lewistown weather for Thursday 30th July 2026

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 88°F, moderate levels of heat & humidity, maximum UV of 6 (High) and 10 hours of bright sunshine. There are 0-2 mm of rainfall expected with 20% chance of some rain and a gentle breeze of 8 mph from the south-east.

88
°F maximum temperature
61
°F minimum temperature
isolated thunderstorms
10
hours of sunshine
6
UV index (High)
20
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
8
mph wind from SE

Lewistown weather for Friday 31st July 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 91°F, moderate levels of heat & humidity, maximum UV of 7 (High) and 14 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 mph from the north-west.

91
°F maximum temperature
59
°F minimum temperature
scattered clouds
14
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
M
moderate heat & humidity
7
mph wind from NW

Lewistown weather for Saturday 1st August 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 99°F, high levels of heat & humidity, maximum UV of 7 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 10 mph from the south-west.

99
°F maximum temperature
61
°F minimum temperature
scattered clouds
12
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
H
high heat & humidity
10
mph wind from SW

Lewistown weather for Sunday 2nd August 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 82°F, low levels of heat & humidity, maximum UV of 7 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 13 mph from the north-west.