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.

Thursday
25th Jun
22

12

8

5
Friday
26th Jun
23

11

3

7
Saturday
27th Jun
18

11

5

6
Sunday
28th Jun
15

8

4

6
Monday
29th Jun
13

7

2

5

5-day weather forecast updated at 04:03 on Friday 26th 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 Thursday 25th June 2026

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 22°C, maximum UV of 5 (Moderate) and 8 hours of bright sunshine. There are 0-2 mm of rainfall expected with 78% chance of some rain and a gentle breeze of 15 kph from the east.

22
°C maximum temperature
12
°C minimum temperature
isolated thunderstorms
8
hours of sunshine
5
UV index (Moderate)
78
% chance of some rain
<2
mm of rainfall expected
22
°C wind chill
15
kph wind from E

Lewistown weather for Friday 26th June 2026

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 23°C, maximum UV of 7 (High) and 3 hours of bright sunshine. There are 5-10 mm of rainfall expected with 92% chance of some rain and a light breeze of 11 kph from the south-east.

23
°C maximum temperature
11
°C minimum temperature
isolated thunderstorms
3
hours of sunshine
7
UV index (High)
92
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
11
kph wind from SE

Lewistown weather for Saturday 27th June 2026

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 18°C, maximum UV of 6 (High) and 5 hours of bright sunshine. There are 10-20 mm of rainfall expected with 95% chance of some rain and a light breeze of 8 kph from the west.

18
°C maximum temperature
11
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
6
UV index (High)
95
% chance of some rain
<20
mm of rainfall expected
18
°C wind chill
8
kph wind from W

Lewistown weather for Sunday 28th June 2026

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 15°C, maximum UV of 6 (High) and 4 hours of bright sunshine. There are 5-10 mm of rainfall expected with 61% chance of some rain and a moderate breeze of 20 kph from the west.

15
°C maximum temperature
8
°C minimum temperature
isolated thunderstorms
4
hours of sunshine
6
UV index (High)
61
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
20
kph wind from W

Lewistown weather for Monday 29th June 2026

Expect mostly cloudy with rain in Lewistown, Montana with a maximum temperature of 13°C, maximum UV of 5 (Moderate) and 2 hours of bright sunshine. There are 5-10 mm of rainfall expected with 70% chance of some rain and a fresh breeze of 29 kph from the south-west.