Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 11°C. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Monday
1st Jun
11

2

1

3
Tuesday
2nd Jun
13

4

4

2
Wednesday
3rd Jun
18

5

11

5
Thursday
4th Jun
21

7

9

8
Friday
5th Jun
23

10

9

8

5-day weather forecast updated at 04:02 on Monday 1st June 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 Monday 1st June 2026

Expect mostly cloudy with rain in Lewistown, Montana with a maximum temperature of 11°C, maximum UV of 3 (Moderate) and 1 hour of bright sunshine. There are 5-10 mm of rainfall expected with 42% chance of some rain and a fresh breeze of 35 kph from the west.

11
°C maximum temperature
2
°C minimum temperature
mostly cloudy with rain
1
hour of sunshine
3
UV index (Moderate)
42
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
35
kph wind from W

Lewistown weather for Tuesday 2nd June 2026

Expect mostly cloudy with light rain in Lewistown, Montana with a maximum temperature of 13°C, maximum UV of 2 (Low) and 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 45% chance of some rain and a gentle breeze of 17 kph from the north-west.

13
°C maximum temperature
4
°C minimum temperature
mostly cloudy with light rain
4
hours of sunshine
2
UV index (Low)
45
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
17
kph wind from NW

Lewistown weather for Wednesday 3rd June 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 18°C, maximum UV of 5 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the north-west.

18
°C maximum temperature
5
°C minimum temperature
scattered clouds
11
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
18
°C wind chill
10
kph wind from NW

Lewistown weather for Thursday 4th June 2026

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 21°C, maximum UV of 8 (Very High) and 9 hours of bright sunshine. There are 5-10 mm of rainfall expected with 76% chance of some rain and a light breeze of 9 kph from the south-east.

21
°C maximum temperature
7
°C minimum temperature
isolated thunderstorms
9
hours of sunshine
8
UV index (Very High)
76
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
9
kph wind from SE

Lewistown weather for Friday 5th June 2026

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 23°C, maximum UV of 8 (Very High) and 9 hours of bright sunshine. There are 0-2 mm of rainfall expected with 21% chance of some rain and a light breeze of 12 kph from the west.