Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 20°C. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Sunday
14th Jun
20

5

12

8
Monday
15th Jun
22

7

9

7
Tuesday
16th Jun
26

13

4

9
Wednesday
17th Jun
18

8

8

7
Thursday
18th Jun
21

6

12

8

5-day weather forecast updated at 04:02 on Sunday 14th 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 14th June 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 20°C, maximum UV of 8 (Very High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 5 kph from the north-west.

20
°C maximum temperature
5
°C minimum temperature
scattered clouds
12
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
0
no heat & humidity
5
kph wind from NW

Lewistown weather for Monday 15th June 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 22°C, maximum UV of 7 (High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 18 kph from the north-west.

22
°C maximum temperature
7
°C minimum temperature
broken clouds
9
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
18
kph wind from NW

Lewistown weather for Tuesday 16th June 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 26°C, maximum UV of 9 (Very High) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 37 kph from the west.

26
°C maximum temperature
13
°C minimum temperature
broken clouds
4
hours of sunshine
9
UV index (Very High)
0
mm of rainfall expected
0
no heat & humidity
37
kph wind from W

Lewistown weather for Wednesday 17th June 2026

Expect sunshine and showers in Lewistown, Montana with a maximum temperature of 18°C, maximum UV of 7 (High) and 8 hours of bright sunshine. There are 2-5 mm of rainfall expected with 69% chance of some rain and a fresh breeze of 33 kph from the north-west.

18
°C maximum temperature
8
°C minimum temperature
sunshine and showers
8
hours of sunshine
7
UV index (High)
69
% chance of some rain
<5
mm of rainfall expected
18
°C wind chill
33
kph wind from NW

Lewistown weather for Thursday 18th June 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 21°C, maximum UV of 8 (Very High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the north-west.