Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 15°C. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Tuesday
20th Oct
15

5

9

2
Wednesday
21st Oct
20

3

10

3
Thursday
22nd Oct
23

8

9

3
Friday
23rd Oct
13

4

0

0
Saturday
24th Oct
8

0

9

2

5-day weather forecast updated at 04:02 on Tuesday 20th October 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 Tuesday 20th October 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 15°C, maximum UV of 2 (Low) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 10 kph from the south-east.

15
°C maximum temperature
5
°C minimum temperature
scattered clouds
9
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
0
no heat & humidity
10
kph wind from SE

Lewistown weather for Wednesday 21st October 2026

Expect clear skies in Lewistown, Montana with a maximum temperature of 20°C, maximum UV of 3 (Moderate) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the south.

20
°C maximum temperature
3
°C minimum temperature
clear skies
10
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
20
°C wind chill
13
kph wind from S

Lewistown weather for Thursday 22nd October 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 23°C, maximum UV of 3 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 11 kph from the south.

23
°C maximum temperature
8
°C minimum temperature
scattered clouds
9
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
23
°C wind chill
11
kph wind from S

Lewistown weather for Friday 23rd October 2026

Expect mostly cloudy with rain in Lewistown, Montana with a maximum temperature of 13°C and no hours of bright sunshine. There are 10-20 mm of rainfall expected with 90% chance of some rain and a fresh breeze of 37 kph from the north-west.

13
°C maximum temperature
4
°C minimum temperature
mostly cloudy with rain
0
hours of sunshine
0
UV index (None)
90
% chance of some rain
<20
mm of rainfall expected
13
°C wind chill
37
kph wind from NW

Lewistown weather for Saturday 24th October 2026

Expect clear skies with flurries of snow in Lewistown, Montana with a maximum temperature of 8°C, maximum UV of 2 (Low) and 9 hours of bright sunshine. There are 0-2 cm of snow expected with 19% chance of some snow and a fresh breeze of 33 kph from the west.