Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 9°C. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Thursday
11th Dec
9

-13

1

0
Friday
12th Dec
-10

-15

0

1
Saturday
13th Dec
2

-15

2

1
Sunday
14th Dec
8

3

4

1
Monday
15th Dec
9

5

0

1

5-day weather forecast updated at 04:05 on Friday 12th 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 11th December 2025

Expect cloudy with sleet or snow in Lewistown, Montana with a maximum temperature of 9°C and 1 hour of bright sunshine. There are 2-5 mm of sleet/snow expected with 100% chance of some sleet or snow and a fresh breeze of 34 kph from the north-west.

9
°C maximum temperature
-13
°C minimum temperature
cloudy with sleet or snow
1
hour of sunshine
0
UV index (None)
100
% chance of some sleet or snow
<5
mm of sleet/snow expected
5
°C wind chill
34
kph wind from NW

Lewistown weather for Friday 12th December 2025

Expect cloudy with some snow in Lewistown, Montana with a maximum temperature of -10°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 20-30 cm of snow expected with 100% chance of some snow and a gentle breeze of 15 kph from the east.

-10
°C maximum temperature
-15
°C minimum temperature
cloudy with some snow
0
hours of sunshine
1
UV index (Low)
100
% chance of some snow
<30
cm of snow expected
-16
°C wind chill
15
kph wind from E

Lewistown weather for Saturday 13th December 2025

Expect mostly cloudy with light snow in Lewistown, Montana with a maximum temperature of 2°C, maximum UV of 1 (Low) and 2 hours of bright sunshine. There are 0-2 cm of snow expected with 15% chance of some snow and a gentle breeze of 19 kph from the west.

2
°C maximum temperature
-15
°C minimum temperature
mostly cloudy with light snow
2
hours of sunshine
1
UV index (Low)
15
% chance of some snow
<2
cm of snow expected
-3
°C wind chill
19
kph wind from W

Lewistown weather for Sunday 14th December 2025

Expect broken clouds in Lewistown, Montana with a maximum temperature of 8°C, maximum UV of 1 (Low) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 23 kph from the south-west.

8
°C maximum temperature
3
°C minimum temperature
broken clouds
4
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
4
°C wind chill
23
kph wind from SW

Lewistown weather for Monday 15th December 2025

Expect broken clouds in Lewistown, Montana with a maximum temperature of 9°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 26 kph from the south-west.