Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 13°C. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Sunday
28th Jun
13

8

0

1
Monday
29th Jun
12

8

0

4
Tuesday
30th Jun
20

9

8

7
Wednesday
1st Jul
21

9

9

6
Thursday
2nd Jul
22

9

9

8

5-day weather forecast updated at 04:03 on Sunday 28th 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 Sunday 28th June 2026

Expect mostly cloudy with rain in Lewistown, Montana with a maximum temperature of 13°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 20-30 mm of rainfall expected with 99% chance of some rain and a moderate breeze of 23 kph from the west.

13
°C maximum temperature
8
°C minimum temperature
mostly cloudy with rain
0
hours of sunshine
1
UV index (Low)
99
% chance of some rain
<30
mm of rainfall expected
13
°C wind chill
23
kph wind from W

Lewistown weather for Monday 29th June 2026

Expect overcast skies in Lewistown, Montana with a maximum temperature of 12°C, maximum UV of 4 (Moderate) and no hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 30 kph from the west.

12
°C maximum temperature
8
°C minimum temperature
overcast skies
0
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
12
°C wind chill
30
kph wind from W

Lewistown weather for Tuesday 30th June 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 20°C, maximum UV of 7 (High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 28 kph from the west.

20
°C maximum temperature
9
°C minimum temperature
broken clouds
8
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
20
°C wind chill
28
kph wind from W

Lewistown weather for Wednesday 1st July 2026

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 21°C, maximum UV of 6 (High) and 9 hours of bright sunshine. There are 2-5 mm of rainfall expected with 72% chance of some rain and a light breeze of 7 kph from the west.

21
°C maximum temperature
9
°C minimum temperature
isolated thunderstorms
9
hours of sunshine
6
UV index (High)
72
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
7
kph wind from W

Lewistown weather for Thursday 2nd July 2026

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 22°C, maximum UV of 8 (Very High) and 9 hours of bright sunshine. There are 2-5 mm of rainfall expected with 42% chance of some rain and a light breeze of 7 kph from the south.