Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 30°C. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Wednesday
8th Jul
30

13

13

8
Thursday
9th Jul
28

14

14

8
Friday
10th Jul
30

13

14

10
Saturday
11th Jul
34

15

14

9
Sunday
12th Jul
37

18

12

9

5-day weather forecast updated at 04:03 on Wednesday 8th 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 8th July 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 13 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the south-east.

30
°C maximum temperature
13
°C minimum temperature
scattered clouds
13
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
M
moderate heat & humidity
9
kph wind from SE

Lewistown weather for Thursday 9th July 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 8 (Very High) and 14 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the north-west.

28
°C maximum temperature
14
°C minimum temperature
scattered clouds
14
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
L
low heat & humidity
9
kph wind from NW

Lewistown weather for Friday 10th July 2026

Expect clear skies in Lewistown, Montana with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 10 (Very High) and 14 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the south.

30
°C maximum temperature
13
°C minimum temperature
clear skies
14
hours of sunshine
10
UV index (Very High)
0
mm of rainfall expected
M
moderate heat & humidity
8
kph wind from S

Lewistown weather for Saturday 11th July 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 34°C, high levels of heat & humidity, maximum UV of 9 (Very High) and 14 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the south-west.

34
°C maximum temperature
15
°C minimum temperature
scattered clouds
14
hours of sunshine
9
UV index (Very High)
0
mm of rainfall expected
H
high heat & humidity
13
kph wind from SW

Lewistown weather for Sunday 12th July 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 37°C, high levels of heat & humidity, maximum UV of 9 (Very High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the west.