Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 25°C. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Sunday
10th May
25

8

13

6
Monday
11th May
22

8

12

7
Tuesday
12th May
24

8

14

7
Wednesday
13th May
31

9

8

7
Thursday
14th May
20

9

6

6

5-day weather forecast updated at 04:03 on Monday 11th 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 Sunday 10th May 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 25°C, maximum UV of 6 (High) and 13 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the south-east.

25
°C maximum temperature
8
°C minimum temperature
scattered clouds
13
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
12
kph wind from SE

Lewistown weather for Monday 11th May 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 22°C, maximum UV of 7 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 32 kph from the north-west.

22
°C maximum temperature
8
°C minimum temperature
scattered clouds
12
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
32
kph wind from NW

Lewistown weather for Tuesday 12th May 2026

Expect clear skies in Lewistown, Montana with a maximum temperature of 24°C, maximum UV of 7 (High) and 14 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the south-east.

24
°C maximum temperature
8
°C minimum temperature
clear skies
14
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
14
kph wind from SE

Lewistown weather for Wednesday 13th May 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 31°C, moderate levels of heat & humidity, maximum UV of 7 (High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the south.

31
°C maximum temperature
9
°C minimum temperature
broken clouds
8
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
M
moderate heat & humidity
16
kph wind from S

Lewistown weather for Thursday 14th May 2026

Expect mostly cloudy with light rain in Lewistown, Montana with a maximum temperature of 20°C, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 2-5 mm of rainfall expected with 41% chance of some rain and a moderate breeze of 28 kph from the west.