Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 2°C. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Sunday
18th Jan
2

-7

1

0
Monday
19th Jan
4

-7

7

1
Tuesday
20th Jan
3

-5

3

1
Wednesday
21st Jan
-4

-10

2

1
Thursday
22nd Jan
-3

-11

6

1

5-day weather forecast updated at 04:06 on Saturday 17th January 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 Sunday 18th January 2026

Expect mostly cloudy with light snow in Lewistown, Montana with a maximum temperature of 2°C and 1 hour of bright sunshine. There are 0-2 cm of snow expected with 40% chance of some snow and a fresh breeze of 31 kph from the north-west.

2
°C maximum temperature
-7
°C minimum temperature
mostly cloudy with light snow
1
hour of sunshine
0
UV index (None)
40
% chance of some snow
<2
cm of snow expected
-4
°C wind chill
31
kph wind from NW

Lewistown weather for Monday 19th January 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 4°C, maximum UV of 1 (Low) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 20 kph from the west.

4
°C maximum temperature
-7
°C minimum temperature
broken clouds
7
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
0
°C wind chill
20
kph wind from W

Lewistown weather for Tuesday 20th January 2026

Expect cloudy with sleet or snow in Lewistown, Montana with a maximum temperature of 3°C, maximum UV of 1 (Low) and 3 hours of bright sunshine. There are 0-2 mm of sleet/snow expected with 53% chance of some sleet or snow and a fresh breeze of 32 kph from the north-west.

3
°C maximum temperature
-5
°C minimum temperature
cloudy with sleet or snow
3
hours of sunshine
1
UV index (Low)
53
% chance of some sleet or snow
<2
mm of sleet/snow expected
-3
°C wind chill
32
kph wind from NW

Lewistown weather for Wednesday 21st January 2026

Expect mostly cloudy with light snow in Lewistown, Montana with a maximum temperature of -4°C, maximum UV of 1 (Low) and 2 hours of bright sunshine. There are 0-2 cm of snow expected with 45% chance of some snow and a moderate breeze of 26 kph from the north-west.

-4
°C maximum temperature
-10
°C minimum temperature
mostly cloudy with light snow
2
hours of sunshine
1
UV index (Low)
45
% chance of some snow
<2
cm of snow expected
-11
°C wind chill
26
kph wind from NW

Lewistown weather for Thursday 22nd January 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of -3°C, maximum UV of 1 (Low) and 6 hours of bright sunshine. There are 0 cm of snow expected and a gentle breeze of 14 kph from the north-west.