Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 17°C. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Saturday
30th May
17

10

1

3
Sunday
31st May
10

5

1

2
Monday
1st Jun
15

5

7

3
Tuesday
2nd Jun
19

5

4

3
Wednesday
3rd Jun
22

6

7

7

5-day weather forecast updated at 04:02 on Saturday 30th 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 30th May 2026

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 17°C, maximum UV of 3 (Moderate) and 1 hour of bright sunshine. There are 10-20 mm of rainfall expected with 99% chance of some rain and a moderate breeze of 22 kph from the north-west.

17
°C maximum temperature
10
°C minimum temperature
isolated thunderstorms
1
hour of sunshine
3
UV index (Moderate)
99
% chance of some rain
<20
mm of rainfall expected
0
no heat & humidity
22
kph wind from NW

Lewistown weather for Sunday 31st May 2026

Expect cloudy with some rain in Lewistown, Montana with a maximum temperature of 10°C, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 10-20 mm of rainfall expected with 83% chance of some rain and a fresh breeze of 32 kph from the west.

10
°C maximum temperature
5
°C minimum temperature
cloudy with some rain
1
hour of sunshine
2
UV index (Low)
83
% chance of some rain
<20
mm of rainfall expected
0
no heat & humidity
32
kph wind from W

Lewistown weather for Monday 1st June 2026

Expect sunshine and showers in Lewistown, Montana with a maximum temperature of 15°C, maximum UV of 3 (Moderate) and 7 hours of bright sunshine. There are 2-5 mm of rainfall expected with 62% chance of some rain and a moderate breeze of 26 kph from the west.

15
°C maximum temperature
5
°C minimum temperature
sunshine and showers
7
hours of sunshine
3
UV index (Moderate)
62
% chance of some rain
<5
mm of rainfall expected
15
°C wind chill
26
kph wind from W

Lewistown weather for Tuesday 2nd June 2026

Expect mostly cloudy with light rain in Lewistown, Montana with a maximum temperature of 19°C, maximum UV of 3 (Moderate) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 38% chance of some rain and a gentle breeze of 17 kph from the north-west.

19
°C maximum temperature
5
°C minimum temperature
mostly cloudy with light rain
4
hours of sunshine
3
UV index (Moderate)
38
% chance of some rain
<2
mm of rainfall expected
19
°C wind chill
17
kph wind from NW

Lewistown weather for Wednesday 3rd June 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 22°C, maximum UV of 7 (High) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the west.