Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 21°C. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Tuesday
30th Jun
21

11

9

6
Wednesday
1st Jul
22

11

9

7
Thursday
2nd Jul
23

11

10

7
Friday
3rd Jul
25

11

9

7
Saturday
4th Jul
26

11

12

8

5-day weather forecast updated at 04:03 on Tuesday 30th 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 Tuesday 30th June 2026

Expect sunshine and showers 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 20% chance of some rain and a moderate breeze of 24 kph from the west.

21
°C maximum temperature
11
°C minimum temperature
sunshine and showers
9
hours of sunshine
6
UV index (High)
20
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
24
kph wind from W

Lewistown weather for Wednesday 1st July 2026

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 22°C, maximum UV of 7 (High) and 9 hours of bright sunshine. There are 0-2 mm of rainfall expected with 44% chance of some rain and little or no wind of 6 kph from the west.

22
°C maximum temperature
11
°C minimum temperature
isolated thunderstorms
9
hours of sunshine
7
UV index (High)
44
% chance of some rain
<2
mm of rainfall expected
22
°C wind chill
6
kph wind from W

Lewistown weather for Thursday 2nd July 2026

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 23°C, maximum UV of 7 (High) and 10 hours of bright sunshine. There are 0-2 mm of rainfall expected with 41% chance of some rain and a light breeze of 7 kph from the west.

23
°C maximum temperature
11
°C minimum temperature
isolated thunderstorms
10
hours of sunshine
7
UV index (High)
41
% chance of some rain
<2
mm of rainfall expected
23
°C wind chill
7
kph wind from W

Lewistown weather for Friday 3rd July 2026

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 25°C, maximum UV of 7 (High) and 9 hours of bright sunshine. There are 2-5 mm of rainfall expected with 76% chance of some rain and little or no wind of 6 kph from the west.

25
°C maximum temperature
11
°C minimum temperature
isolated thunderstorms
9
hours of sunshine
7
UV index (High)
76
% chance of some rain
<5
mm of rainfall expected
25
°C wind chill
6
kph wind from W

Lewistown weather for Saturday 4th July 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 26°C, maximum UV of 8 (Very High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the north-west.