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.

Sunday
21st Dec
5

-3

0

0
Monday
22nd Dec
7

-2

4

1
Tuesday
23rd Dec
8

-1

3

1
Wednesday
24th Dec
10

-1

3

1
Thursday
25th Dec
5

-4

1

1

5-day weather forecast updated at 04:03 on Sunday 21st 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 Sunday 21st December 2025

Expect cloudy with sleet or snow in Lewistown, Montana with a maximum temperature of 5°C and no hours of bright sunshine. There are 0-2 mm of sleet/snow expected with 55% chance of some sleet or snow and a gentle breeze of 18 kph from the south.

5
°C maximum temperature
-3
°C minimum temperature
cloudy with sleet or snow
0
hours of sunshine
0
UV index (None)
55
% chance of some sleet or snow
<2
mm of sleet/snow expected
1
°C wind chill
18
kph wind from S

Lewistown weather for Monday 22nd December 2025

Expect sunshine and showers in Lewistown, Montana with a maximum temperature of 7°C, maximum UV of 1 (Low) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 14% chance of some rain and a moderate breeze of 23 kph from the west.

7
°C maximum temperature
-2
°C minimum temperature
sunshine and showers
4
hours of sunshine
1
UV index (Low)
14
% chance of some rain
<2
mm of rainfall expected
3
°C wind chill
23
kph wind from W

Lewistown weather for Tuesday 23rd December 2025

Expect broken clouds in Lewistown, Montana with a maximum temperature of 8°C, maximum UV of 1 (Low) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the south-east.

8
°C maximum temperature
-1
°C minimum temperature
broken clouds
3
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
6
°C wind chill
15
kph wind from SE

Lewistown weather for Wednesday 24th December 2025

Expect mostly cloudy with light snow in Lewistown, Montana with a maximum temperature of 10°C, maximum UV of 1 (Low) and 3 hours of bright sunshine. There are 0-2 cm of snow expected with 25% chance of some snow and a gentle breeze of 18 kph from the south.

10
°C maximum temperature
-1
°C minimum temperature
mostly cloudy with light snow
3
hours of sunshine
1
UV index (Low)
25
% chance of some snow
<2
cm of snow expected
0
no heat & humidity
18
kph wind from S

Lewistown weather for Thursday 25th December 2025

Expect mostly cloudy with light snow in Lewistown, Montana with a maximum temperature of 5°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 2-5 cm of snow expected with 22% chance of some snow and a gentle breeze of 16 kph from the south.