Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 32°C. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Friday
31st Jul
32

15

15

8
Saturday
1st Aug
37

14

11

8
Sunday
2nd Aug
29

13

13

8
Monday
3rd Aug
19

7

7

7
Tuesday
4th Aug
23

5

15

8

5-day weather forecast updated at 04:03 on Friday 31st 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 Friday 31st July 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 32°C, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 15 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the north-west.

32
°C maximum temperature
15
°C minimum temperature
scattered clouds
15
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
M
moderate heat & humidity
10
kph wind from NW

Lewistown weather for Saturday 1st August 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 37°C, high levels of heat & humidity, maximum UV of 8 (Very High) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 20 kph from the south-west.

37
°C maximum temperature
14
°C minimum temperature
scattered clouds
11
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
H
high heat & humidity
20
kph wind from SW

Lewistown weather for Sunday 2nd August 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 29°C, low 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 moderate breeze of 22 kph from the north-west.

29
°C maximum temperature
13
°C minimum temperature
scattered clouds
13
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
L
low heat & humidity
22
kph wind from NW

Lewistown weather for Monday 3rd August 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 19°C, maximum UV of 7 (High) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 20 kph from the north-west.

19
°C maximum temperature
7
°C minimum temperature
broken clouds
7
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
19
°C wind chill
20
kph wind from NW

Lewistown weather for Tuesday 4th August 2026

Expect clear skies in Lewistown, Montana with a maximum temperature of 23°C, maximum UV of 8 (Very High) and 15 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the north.