Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 70°F. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Friday
20th Mar
70

48

7

5
Saturday
21st Mar
55

34

0

1
Sunday
22nd Mar
48

28

11

4
Monday
23rd Mar
52

28

3

3
Tuesday
24th Mar
57

32

2

4

5-day weather forecast updated at 04:03 on Friday 20th March 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 Friday 20th March 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 70°F, maximum UV of 5 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 21 mph from the west.

70
°F maximum temperature
48
°F minimum temperature
scattered clouds
7
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
70
°F wind chill
21
mph wind from W

Lewistown weather for Saturday 21st March 2026

Expect mostly cloudy with light rain in Lewistown, Montana with a maximum temperature of 55°F, maximum UV of 1 (Low) and no hours of bright sunshine. There are 2-5 mm of rainfall expected with 83% chance of some rain and a moderate breeze of 13 mph from the north-west.

55
°F maximum temperature
34
°F minimum temperature
mostly cloudy with light rain
0
hours of sunshine
1
UV index (Low)
83
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
13
mph wind from NW

Lewistown weather for Sunday 22nd March 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 48°F, maximum UV of 4 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 16 mph from the west.

48
°F maximum temperature
28
°F minimum temperature
scattered clouds
11
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
43
°F wind chill
16
mph wind from W

Lewistown weather for Monday 23rd March 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 52°F, maximum UV of 3 (Moderate) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 9 mph from the south-west.

52
°F maximum temperature
28
°F minimum temperature
broken clouds
3
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
9
mph wind from SW

Lewistown weather for Tuesday 24th March 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 57°F, maximum UV of 4 (Moderate) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 12 mph from the south-west.