Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 6°C. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Tuesday
9th Dec
6

-3

1

0
Wednesday
10th Dec
5

-2

0

0
Thursday
11th Dec
2

-15

0

0
Friday
12th Dec
-2

-17

1

1
Saturday
13th Dec
1

-7

4

0

5-day weather forecast updated at 04:04 on Monday 8th 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 Tuesday 9th December 2025

Expect cloudy with sleet or snow in Lewistown, Montana with a maximum temperature of 6°C and 1 hour of bright sunshine. There are 5-10 mm of sleet/snow expected with 77% chance of some sleet or snow and a strong breeze of 39 kph from the west.

6
°C maximum temperature
-3
°C minimum temperature
cloudy with sleet or snow
1
hour of sunshine
0
UV index (None)
77
% chance of some sleet or snow
<10
mm of sleet/snow expected
1
°C wind chill
39
kph wind from W

Lewistown weather for Wednesday 10th 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 10-20 mm of sleet/snow expected with 89% chance of some sleet or snow and a moderate breeze of 24 kph from the west.

5
°C maximum temperature
-2
°C minimum temperature
cloudy with sleet or snow
0
hours of sunshine
0
UV index (None)
89
% chance of some sleet or snow
<20
mm of sleet/snow expected
1
°C wind chill
24
kph wind from W

Lewistown weather for Thursday 11th December 2025

Expect cloudy with sleet or snow in Lewistown, Montana with a maximum temperature of 2°C and no hours of bright sunshine. There are 20-30 mm of sleet/snow expected with 80% chance of some sleet or snow and a gentle breeze of 19 kph from the north-west.

2
°C maximum temperature
-15
°C minimum temperature
cloudy with sleet or snow
0
hours of sunshine
0
UV index (None)
80
% chance of some sleet or snow
<30
mm of sleet/snow expected
-3
°C wind chill
19
kph wind from NW

Lewistown weather for Friday 12th December 2025

Expect mostly cloudy with snow in Lewistown, Montana with a maximum temperature of -2°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 5-10 cm of snow expected with 79% chance of some snow and a gentle breeze of 13 kph from the east.

-2
°C maximum temperature
-17
°C minimum temperature
mostly cloudy with snow
1
hour of sunshine
1
UV index (Low)
79
% chance of some snow
<10
cm of snow expected
-7
°C wind chill
13
kph wind from E

Lewistown weather for Saturday 13th December 2025

Expect cloudy with sleet or snow in Lewistown, Montana with a maximum temperature of 1°C and 4 hours of bright sunshine. There are 0-2 mm of sleet/snow expected with 37% chance of some sleet or snow and a gentle breeze of 19 kph from the west.