Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 84°F. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Thursday
9th Jul
84

57

12

9
Friday
10th Jul
90

55

15

9
Saturday
11th Jul
95

59

11

9
Sunday
12th Jul
102

63

10

10
Monday
13th Jul
88

63

3

9

5-day weather forecast updated at 04:03 on Thursday 9th July 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 Thursday 9th July 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 84°F, low levels of heat & humidity, maximum UV of 9 (Very High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 6 mph from the north-west.

84
°F maximum temperature
57
°F minimum temperature
scattered clouds
12
hours of sunshine
9
UV index (Very High)
0
mm of rainfall expected
L
low heat & humidity
6
mph wind from NW

Lewistown weather for Friday 10th July 2026

Expect clear skies in Lewistown, Montana with a maximum temperature of 90°F, moderate levels of heat & humidity, maximum UV of 9 (Very High) and 15 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 5 mph from the west.

90
°F maximum temperature
55
°F minimum temperature
clear skies
15
hours of sunshine
9
UV index (Very High)
0
mm of rainfall expected
M
moderate heat & humidity
5
mph wind from W

Lewistown weather for Saturday 11th July 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 95°F, high levels of heat & humidity, maximum UV of 9 (Very High) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 9 mph from the west.

95
°F maximum temperature
59
°F minimum temperature
scattered clouds
11
hours of sunshine
9
UV index (Very High)
0
mm of rainfall expected
H
high heat & humidity
9
mph wind from W

Lewistown weather for Sunday 12th July 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 102°F, very high levels of heat & humidity, maximum UV of 10 (Very High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 9 mph from the south.

102
°F maximum temperature
63
°F minimum temperature
scattered clouds
10
hours of sunshine
10
UV index (Very High)
0
mm of rainfall expected
VH
very high heat & humidity
9
mph wind from S

Lewistown weather for Monday 13th July 2026

Expect broken clouds in Lewistown, Montana with a maximum temperature of 88°F, moderate levels of heat & humidity, maximum UV of 9 (Very High) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 8 mph from the east.