Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 27°C. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Thursday
24th Sep
27

11

12

5
Friday
25th Sep
29

12

11

5
Saturday
26th Sep
19

8

11

4
Sunday
27th Sep
17

5

2

4
Monday
28th Sep
17

6

0

5

5-day weather forecast updated at 04:03 on Thursday 24th September 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 Thursday 24th September 2026

Expect clear skies in Lewistown, Montana with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 5 (Moderate) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the south-east.

27
°C maximum temperature
11
°C minimum temperature
clear skies
12
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
L
low heat & humidity
17
kph wind from SE

Lewistown weather for Friday 25th September 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 29°C, low levels of heat & humidity, maximum UV of 5 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 20 kph from the south.

29
°C maximum temperature
12
°C minimum temperature
scattered clouds
11
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
L
low heat & humidity
20
kph wind from S

Lewistown weather for Saturday 26th September 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 19°C, maximum UV of 4 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 19 kph from the west.

19
°C maximum temperature
8
°C minimum temperature
scattered clouds
11
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
19
°C wind chill
19
kph wind from W

Lewistown weather for Sunday 27th September 2026

Expect mostly cloudy with light rain in Lewistown, Montana with a maximum temperature of 17°C, maximum UV of 4 (Moderate) and 2 hours of bright sunshine. There are 0-2 mm of rainfall expected with 37% chance of some rain and a light breeze of 10 kph from the east.

17
°C maximum temperature
5
°C minimum temperature
mostly cloudy with light rain
2
hours of sunshine
4
UV index (Moderate)
37
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
10
kph wind from E

Lewistown weather for Monday 28th September 2026

Expect mostly cloudy with light rain in Lewistown, Montana with a maximum temperature of 17°C, maximum UV of 5 (Moderate) and no hours of bright sunshine. There are 0-2 mm of rainfall expected with 22% chance of some rain and a light breeze of 12 kph from the north-west.