Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 16°C. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Wednesday
30th Sep
16

8

3

3
Thursday
1st Oct
14

6

2

3
Friday
2nd Oct
18

5

1

4
Saturday
3rd Oct
18

5

8

4
Sunday
4th Oct
21

6

11

4

5-day weather forecast updated at 04:03 on Wednesday 30th 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 Wednesday 30th September 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 16°C, maximum UV of 3 (Moderate) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 24 kph from the north-west.

16
°C maximum temperature
8
°C minimum temperature
broken clouds
3
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
16
°C wind chill
24
kph wind from NW

Lewistown weather for Thursday 1st October 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 14°C, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the east.

14
°C maximum temperature
6
°C minimum temperature
broken clouds
2
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
14
°C wind chill
12
kph wind from E

Lewistown weather for Friday 2nd October 2026

Expect mostly cloudy with light rain in Lewistown, Montana with a maximum temperature of 18°C, maximum UV of 4 (Moderate) and 1 hour of bright sunshine. There are 0-2 mm of rainfall expected with 12% chance of some rain and a light breeze of 10 kph from the south.

18
°C maximum temperature
5
°C minimum temperature
mostly cloudy with light rain
1
hour of sunshine
4
UV index (Moderate)
12
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
10
kph wind from S

Lewistown weather for Saturday 3rd October 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 18°C, maximum UV of 4 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the south-east.

18
°C maximum temperature
5
°C minimum temperature
scattered clouds
8
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
18
°C wind chill
13
kph wind from SE

Lewistown weather for Sunday 4th October 2026

Expect clear skies in Lewistown, Montana with a maximum temperature of 21°C, maximum UV of 4 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the south-east.