Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 26°C. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Wednesday
5th Aug
26

8

12

7
Thursday
6th Aug
28

9

15

7
Friday
7th Aug
31

10

15

7
Saturday
8th Aug
32

12

13

8
Sunday
9th Aug
29

13

14

6

5-day weather forecast updated at 04:02 on Wednesday 5th August 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 5th August 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 26°C, maximum UV of 7 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the north-west.

26
°C maximum temperature
8
°C minimum temperature
scattered clouds
12
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
14
kph wind from NW

Lewistown weather for Thursday 6th August 2026

Expect clear skies in Lewistown, Montana with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 7 (High) and 15 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 22 kph from the north-west.

28
°C maximum temperature
9
°C minimum temperature
clear skies
15
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
22
kph wind from NW

Lewistown weather for Friday 7th August 2026

Expect clear skies in Lewistown, Montana with a maximum temperature of 31°C, moderate levels of heat & humidity, maximum UV of 7 (High) and 15 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the south-east.

31
°C maximum temperature
10
°C minimum temperature
clear skies
15
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
M
moderate heat & humidity
13
kph wind from SE

Lewistown weather for Saturday 8th August 2026

Expect clear skies in Lewistown, Montana with a maximum temperature of 32°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 gentle breeze of 13 kph from the north.

32
°C maximum temperature
12
°C minimum temperature
clear skies
13
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
M
moderate heat & humidity
13
kph wind from N

Lewistown weather for Sunday 9th August 2026

Expect clear skies in Lewistown, Montana with a maximum temperature of 29°C, low levels of heat & humidity, maximum UV of 6 (High) and 14 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 19 kph from the north-west.