Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 14°C. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Thursday
21st May
14

4

5

UV5
Friday
22nd May
19

4

13

UV7
Saturday
23rd May
24

9

9

UV7
Sunday
24th May
26

10

8

UV7
Monday
25th May
28

12

12

UV5

5-day weather forecast updated at 04:02 on Thursday 21st 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 Thursday 21st May 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 14°C, maximum UV of 5 (Moderate) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 18 kph from the north-west.

14
°C maximum temperature
4
°C minimum temperature
broken clouds
5
hours of sunshine
UV5
UV index (Moderate)
0
mm of rainfall expected
14
°C wind chill
18
kph wind from NW

Lewistown weather for Friday 22nd May 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 19°C, maximum UV of 7 (High) and 13 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the north-west.

19
°C maximum temperature
4
°C minimum temperature
scattered clouds
13
hours of sunshine
UV7
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
8
kph wind from NW

Lewistown weather for Saturday 23rd May 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 24°C, maximum UV of 7 (High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 9 kph from the south.

24
°C maximum temperature
9
°C minimum temperature
scattered clouds
9
hours of sunshine
UV7
UV index (High)
0
mm of rainfall expected
24
°C wind chill
9
kph wind from S

Lewistown weather for Sunday 24th May 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 26°C, maximum UV of 7 (High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 20 kph from the west.

26
°C maximum temperature
10
°C minimum temperature
scattered clouds
8
hours of sunshine
UV7
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
20
kph wind from W

Lewistown weather for Monday 25th May 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 5 (Moderate) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the south-west.