Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 5°C. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Thursday
18th Dec
5

-9

2

1
Friday
19th Dec
8

-3

2

1
Saturday
20th Dec
2

-3

4

1
Sunday
21st Dec
4

-2

0

1
Monday
22nd Dec
6

0

0

1

5-day weather forecast updated at 04:04 on Friday 19th December 2025 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 18th December 2025

Expect broken clouds in Lewistown, Montana with a maximum temperature of 5°C, maximum UV of 1 (Low) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 33 kph from the south-west.

5
°C maximum temperature
-9
°C minimum temperature
broken clouds
2
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
0
°C wind chill
33
kph wind from SW

Lewistown weather for Friday 19th December 2025

Expect cloudy with sleet or snow in Lewistown, Montana with a maximum temperature of 8°C, maximum UV of 1 (Low) and 2 hours of bright sunshine. There are 5-10 mm of sleet/snow expected with 29% chance of some sleet or snow and a strong breeze of 43 kph from the west.

8
°C maximum temperature
-3
°C minimum temperature
cloudy with sleet or snow
2
hours of sunshine
1
UV index (Low)
29
% chance of some sleet or snow
<10
mm of sleet/snow expected
3
°C wind chill
43
kph wind from W

Lewistown weather for Saturday 20th December 2025

Expect broken clouds in Lewistown, Montana with a maximum temperature of 2°C, maximum UV of 1 (Low) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 30 kph from the west.

2
°C maximum temperature
-3
°C minimum temperature
broken clouds
4
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
-3
°C wind chill
30
kph wind from W

Lewistown weather for Sunday 21st December 2025

Expect broken clouds in Lewistown, Montana with a maximum temperature of 4°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 18 kph from the south.

4
°C maximum temperature
-2
°C minimum temperature
broken clouds
0
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
0
°C wind chill
18
kph wind from S

Lewistown weather for Monday 22nd December 2025

Expect mostly cloudy with light rain in Lewistown, Montana with a maximum temperature of 6°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 0-2 mm of rainfall expected with 35% chance of some rain and a gentle breeze of 18 kph from the west.