Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 22°C. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Tuesday
29th Sep
22

7

9

5
Wednesday
30th Sep
15

6

6

3
Thursday
1st Oct
17

4

4

4
Friday
2nd Oct
20

7

11

4
Saturday
3rd Oct
17

8

6

5

5-day weather forecast updated at 04:03 on Tuesday 29th 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 Tuesday 29th September 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 22°C, maximum UV of 5 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 27 kph from the west.

22
°C maximum temperature
7
°C minimum temperature
scattered clouds
9
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
22
°C wind chill
27
kph wind from W

Lewistown weather for Wednesday 30th September 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 15°C, maximum UV of 3 (Moderate) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 29 kph from the north-west.

15
°C maximum temperature
6
°C minimum temperature
broken clouds
6
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
29
kph wind from NW

Lewistown weather for Thursday 1st October 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 17°C, maximum UV of 4 (Moderate) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the south-east.

17
°C maximum temperature
4
°C minimum temperature
broken clouds
4
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
12
kph wind from SE

Lewistown weather for Friday 2nd October 2026

Expect sunshine and showers in Lewistown, Montana with a maximum temperature of 20°C, maximum UV of 4 (Moderate) and 11 hours of bright sunshine. There are 0-2 mm of rainfall expected with 21% chance of some rain and a gentle breeze of 13 kph from the north-west.

20
°C maximum temperature
7
°C minimum temperature
sunshine and showers
11
hours of sunshine
4
UV index (Moderate)
21
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
13
kph wind from NW

Lewistown weather for Saturday 3rd October 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 17°C, maximum UV of 5 (Moderate) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the south-east.