Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 15°C. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Saturday
13th Jun
15

6

3

5
Sunday
14th Jun
20

5

14

8
Monday
15th Jun
23

8

6

9
Tuesday
16th Jun
26

14

4

9
Wednesday
17th Jun
18

10

8

8

5-day weather forecast updated at 04:02 on Saturday 13th 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 Saturday 13th June 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 15°C, maximum UV of 5 (Moderate) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 20 kph from the north-west.

15
°C maximum temperature
6
°C minimum temperature
broken clouds
3
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
15
°C wind chill
20
kph wind from NW

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 14 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 6 kph from the north-west.

20
°C maximum temperature
5
°C minimum temperature
scattered clouds
14
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
0
no heat & humidity
6
kph wind from NW

Lewistown weather for Monday 15th June 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 23°C, maximum UV of 9 (Very High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 18 kph from the north-west.

23
°C maximum temperature
8
°C minimum temperature
broken clouds
6
hours of sunshine
9
UV index (Very High)
0
mm of rainfall expected
23
°C wind chill
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 32 kph from the west.

26
°C maximum temperature
14
°C minimum temperature
broken clouds
4
hours of sunshine
9
UV index (Very High)
0
mm of rainfall expected
0
no heat & humidity
32
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 8 (Very High) and 8 hours of bright sunshine. There are 0-2 mm of rainfall expected with 56% chance of some rain and a fresh breeze of 30 kph from the north-west.