Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 26°C. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Friday
26th Jun
26

11

5

6
Saturday
27th Jun
19

11

4

6
Sunday
28th Jun
11

8

0

3
Monday
29th Jun
13

7

1

5
Tuesday
30th Jun
19

9

9

8

5-day weather forecast updated at 04:03 on Saturday 27th 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 Friday 26th June 2026

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 26°C, maximum UV of 6 (High) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 92% chance of some rain and a light breeze of 10 kph from the south-east.

26
°C maximum temperature
11
°C minimum temperature
isolated thunderstorms
5
hours of sunshine
6
UV index (High)
92
% chance of some rain
<2
mm of rainfall expected
26
°C wind chill
10
kph wind from SE

Lewistown weather for Saturday 27th June 2026

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 19°C, maximum UV of 6 (High) and 4 hours of bright sunshine. There are 5-10 mm of rainfall expected with 81% chance of some rain and a light breeze of 9 kph from the west.

19
°C maximum temperature
11
°C minimum temperature
isolated thunderstorms
4
hours of sunshine
6
UV index (High)
81
% chance of some rain
<10
mm of rainfall expected
19
°C wind chill
9
kph wind from W

Lewistown weather for Sunday 28th June 2026

Expect cloudy with some rain in Lewistown, Montana with a maximum temperature of 11°C, maximum UV of 3 (Moderate) and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 73% chance of some rain and a moderate breeze of 23 kph from the west.

11
°C maximum temperature
8
°C minimum temperature
cloudy with some rain
0
hours of sunshine
3
UV index (Moderate)
73
% chance of some rain
<20
mm of rainfall expected
0
no heat & humidity
23
kph wind from W

Lewistown weather for Monday 29th June 2026

Expect cloudy with some rain in Lewistown, Montana with a maximum temperature of 13°C, maximum UV of 5 (Moderate) and 1 hour of bright sunshine. There are 10-20 mm of rainfall expected with 79% chance of some rain and a fresh breeze of 29 kph from the west.

13
°C maximum temperature
7
°C minimum temperature
cloudy with some rain
1
hour of sunshine
5
UV index (Moderate)
79
% chance of some rain
<20
mm of rainfall expected
13
°C wind chill
29
kph wind from W

Lewistown weather for Tuesday 30th June 2026

Expect sunshine and showers in Lewistown, Montana with a maximum temperature of 19°C, maximum UV of 8 (Very High) and 9 hours of bright sunshine. There are 0-2 mm of rainfall expected with 30% chance of some rain and a moderate breeze of 23 kph from the west.