Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 27°C. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Tuesday
21st Apr
27

8

9

6
Wednesday
22nd Apr
23

6

7

6
Thursday
23rd Apr
5

-2

0

4
Friday
24th Apr
2

-6

2

4
Saturday
25th Apr
2

-7

3

6

5-day weather forecast updated at 04:02 on Tuesday 21st April 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 Tuesday 21st April 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 27°C, maximum UV of 6 (High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the south.

27
°C maximum temperature
8
°C minimum temperature
broken clouds
9
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
27
°C wind chill
15
kph wind from S

Lewistown weather for Wednesday 22nd April 2026

Expect isolated thunderstorms in Lewistown, Montana with a maximum temperature of 23°C, maximum UV of 6 (High) and 7 hours of bright sunshine. There are 2-5 mm of rainfall expected with 78% chance of some rain and a fresh breeze of 33 kph from the south-west.

23
°C maximum temperature
6
°C minimum temperature
isolated thunderstorms
7
hours of sunshine
6
UV index (High)
78
% chance of some rain
<5
mm of rainfall expected
23
°C wind chill
33
kph wind from SW

Lewistown weather for Thursday 23rd April 2026

Expect cloudy with sleet or snow in Lewistown, Montana with a maximum temperature of 5°C, maximum UV of 4 (Moderate) and no hours of bright sunshine. There are 10-20 mm of sleet/snow expected with 81% chance of some sleet or snow and a strong breeze of 43 kph from the north-west.

5
°C maximum temperature
-2
°C minimum temperature
cloudy with sleet or snow
0
hours of sunshine
4
UV index (Moderate)
81
% chance of some sleet or snow
<20
mm of sleet/snow expected
-1
°C wind chill
43
kph wind from NW

Lewistown weather for Friday 24th April 2026

Expect mostly cloudy with light snow in Lewistown, Montana with a maximum temperature of 2°C, maximum UV of 4 (Moderate) and 2 hours of bright sunshine. There are 0-2 cm of snow expected with 53% chance of some snow and a fresh breeze of 35 kph from the north-west.

2
°C maximum temperature
-6
°C minimum temperature
mostly cloudy with light snow
2
hours of sunshine
4
UV index (Moderate)
53
% chance of some snow
<2
cm of snow expected
-5
°C wind chill
35
kph wind from NW

Lewistown weather for Saturday 25th April 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 2°C, maximum UV of 6 (High) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 23 kph from the north-west.