Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 24°C. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Saturday
5th Sep
24

9

11

7
Sunday
6th Sep
24

10

5

2
Monday
7th Sep
20

9

3

4
Tuesday
8th Sep
18

9

4

5
Wednesday
9th Sep
23

7

7

6

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

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 24°C, maximum UV of 7 (High) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the north.

24
°C maximum temperature
9
°C minimum temperature
scattered clouds
11
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
12
kph wind from N

Lewistown weather for Sunday 6th September 2026

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 24°C, maximum UV of 2 (Low) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 55% chance of some rain and a gentle breeze of 14 kph from the north-east.

24
°C maximum temperature
10
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
2
UV index (Low)
55
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
14
kph wind from NE

Lewistown weather for Monday 7th September 2026

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 20°C, maximum UV of 4 (Moderate) and 3 hours of bright sunshine. There are 10-20 mm of rainfall expected with 92% chance of some rain and a moderate breeze of 25 kph from the west.

20
°C maximum temperature
9
°C minimum temperature
isolated thunderstorms
3
hours of sunshine
4
UV index (Moderate)
92
% chance of some rain
<20
mm of rainfall expected
20
°C wind chill
25
kph wind from W

Lewistown weather for Tuesday 8th September 2026

Expect mostly cloudy with light rain in Lewistown, Montana with a maximum temperature of 18°C, maximum UV of 5 (Moderate) and 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 24% chance of some rain and a strong breeze of 39 kph from the west.

18
°C maximum temperature
9
°C minimum temperature
mostly cloudy with light rain
4
hours of sunshine
5
UV index (Moderate)
24
% chance of some rain
<5
mm of rainfall expected
18
°C wind chill
39
kph wind from W

Lewistown weather for Wednesday 9th September 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 23°C, maximum UV of 6 (High) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the south.