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.

Wednesday
18th Mar
15

4

3

5
Thursday
19th Mar
18

5

6

5
Friday
20th Mar
19

6

8

4
Saturday
21st Mar
10

-1

0

4
Sunday
22nd Mar
10

-4

9

5

5-day weather forecast updated at 04:03 on Wednesday 18th March 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 Wednesday 18th March 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 fresh breeze of 33 kph from the west.

15
°C maximum temperature
4
°C minimum temperature
broken clouds
3
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
15
°C wind chill
33
kph wind from W

Lewistown weather for Thursday 19th March 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 18°C, maximum UV of 5 (Moderate) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 32 kph from the west.

18
°C maximum temperature
5
°C minimum temperature
scattered clouds
6
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
18
°C wind chill
32
kph wind from W

Lewistown weather for Friday 20th March 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 19°C, maximum UV of 4 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 30 kph from the west.

19
°C maximum temperature
6
°C minimum temperature
scattered clouds
8
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
19
°C wind chill
30
kph wind from W

Lewistown weather for Saturday 21st March 2026

Expect mostly cloudy with light rain in Lewistown, Montana with a maximum temperature of 10°C, maximum UV of 4 (Moderate) and no hours of bright sunshine. There are 0-2 mm of rainfall expected with 40% chance of some rain and a moderate breeze of 23 kph from the north-west.

10
°C maximum temperature
-1
°C minimum temperature
mostly cloudy with light rain
0
hours of sunshine
4
UV index (Moderate)
40
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
23
kph wind from NW

Lewistown weather for Sunday 22nd March 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 10°C, maximum UV of 5 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the west.