Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 19°C. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Wednesday
6th May
19

-4

13

6
Thursday
7th May
17

6

3

5
Friday
8th May
21

5

3

6
Saturday
9th May
14

5

2

5
Sunday
10th May
25

4

6

6

5-day weather forecast updated at 04:03 on Thursday 7th 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 Wednesday 6th May 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 19°C, maximum UV of 6 (High) and 13 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the west.

19
°C maximum temperature
-4
°C minimum temperature
scattered clouds
13
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
19
°C wind chill
14
kph wind from W

Lewistown weather for Thursday 7th May 2026

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 17°C, maximum UV of 5 (Moderate) and 3 hours of bright sunshine. There are 2-5 mm of rainfall expected with 47% chance of some rain and a moderate breeze of 24 kph from the north-west.

17
°C maximum temperature
6
°C minimum temperature
isolated thunderstorms
3
hours of sunshine
5
UV index (Moderate)
47
% chance of some rain
<5
mm of rainfall expected
17
°C wind chill
24
kph wind from NW

Lewistown weather for Friday 8th May 2026

Expect mostly cloudy with light rain in Lewistown, Montana with a maximum temperature of 21°C, maximum UV of 6 (High) and 3 hours of bright sunshine. There are 0-2 mm of rainfall expected with 40% chance of some rain and a moderate breeze of 20 kph from the west.

21
°C maximum temperature
5
°C minimum temperature
mostly cloudy with light rain
3
hours of sunshine
6
UV index (High)
40
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
20
kph wind from W

Lewistown weather for Saturday 9th May 2026

Expect mostly cloudy with light rain in Lewistown, Montana with a maximum temperature of 14°C, maximum UV of 5 (Moderate) and 2 hours of bright sunshine. There are 2-5 mm of rainfall expected with 81% chance of some rain and a moderate breeze of 24 kph from the north-west.

14
°C maximum temperature
5
°C minimum temperature
mostly cloudy with light rain
2
hours of sunshine
5
UV index (Moderate)
81
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
24
kph wind from NW

Lewistown weather for Sunday 10th May 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 25°C, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the south.