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.

Saturday
17th Jan
9

-7

8

1
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

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

More about Lewistown

Lewistown by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Montana

Travelsphere: up to £800 off worldwide holidays

Sale

Save up to £800 per couple on selected worldwide tours
Plus save up to £300 per couple on European tours
Book tours online in Travelsphere New Year sale

Go to Travelsphere deal >>

Expires at 23:59 on Saturday 28th Feb 2026 · View all Travelsphere offers

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 Saturday 17th January 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 9°C, maximum UV of 1 (Low) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 27 kph from the west.

9
°C maximum temperature
-7
°C minimum temperature
scattered clouds
8
hours of sunshine
1
UV index (Low)
0
mm of rainfall expected
6
°C wind chill
27
kph wind from W

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.