Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 72°F. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Monday
11th May
72

46

12

7
Tuesday
12th May
75

46

14

7
Wednesday
13th May
88

48

8

7
Thursday
14th May
68

48

6

6
Friday
15th May
70

46

6

7

5-day weather forecast updated at 04:03 on Monday 11th May 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 Monday 11th May 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 72°F, maximum UV of 7 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 20 mph from the north-west.

72
°F maximum temperature
46
°F minimum temperature
scattered clouds
12
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
20
mph wind from NW

Lewistown weather for Tuesday 12th May 2026

Expect clear skies in Lewistown, Montana with a maximum temperature of 75°F, maximum UV of 7 (High) and 14 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 9 mph from the south-east.

75
°F maximum temperature
46
°F minimum temperature
clear skies
14
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
9
mph wind from SE

Lewistown weather for Wednesday 13th May 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 88°F, moderate levels of heat & humidity, maximum UV of 7 (High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 10 mph from the south.

88
°F maximum temperature
48
°F minimum temperature
broken clouds
8
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
M
moderate heat & humidity
10
mph wind from S

Lewistown weather for Thursday 14th May 2026

Expect mostly cloudy with light rain in Lewistown, Montana with a maximum temperature of 68°F, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 2-5 mm of rainfall expected with 41% chance of some rain and a moderate breeze of 17 mph from the west.

68
°F maximum temperature
48
°F minimum temperature
mostly cloudy with light rain
6
hours of sunshine
6
UV index (High)
41
% chance of some rain
<5
mm of rainfall expected
68
°F wind chill
17
mph wind from W

Lewistown weather for Friday 15th May 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 70°F, maximum UV of 7 (High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 16 mph from the west.