Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 18°C. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Saturday
2nd May
18

7

7

6
Sunday
3rd May
19

6

12

6
Monday
4th May
10

3

1

5
Tuesday
5th May
8

0

4

5
Wednesday
6th May
14

-1

12

6

5-day weather forecast updated at 04:02 on Saturday 2nd May 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 2nd May 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 18°C, maximum UV of 6 (High) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the north-west.

18
°C maximum temperature
7
°C minimum temperature
broken clouds
7
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
18
°C wind chill
12
kph wind from NW

Lewistown weather for Sunday 3rd May 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 19°C, maximum UV of 6 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the north-west.

19
°C maximum temperature
6
°C minimum temperature
broken clouds
12
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
17
kph wind from NW

Lewistown weather for Monday 4th May 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 10°C, maximum UV of 5 (Moderate) and 1 hour of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 25 kph from the north-west.

10
°C maximum temperature
3
°C minimum temperature
broken clouds
1
hour of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
7
°C wind chill
25
kph wind from NW

Lewistown weather for Tuesday 5th May 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 8°C, maximum UV of 5 (Moderate) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 20 kph from the north.

8
°C maximum temperature
0
°C minimum temperature
broken clouds
4
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
5
°C wind chill
20
kph wind from N

Lewistown weather for Wednesday 6th May 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 14°C, maximum UV of 6 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the north-west.