Lewistown weather live forecast

Today's maximum temperature in Lewistown is expected to be 31°C. Select a day from the live weather forecast for Lewistown, Montana, USA for more weather parameters.

Friday
7th Aug
31

13

14

7
Saturday
8th Aug
31

15

14

7
Sunday
9th Aug
29

14

12

7
Monday
10th Aug
30

12

8

7
Tuesday
11th Aug
29

11

11

7

5-day weather forecast updated at 04:03 on Friday 7th August 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 7th August 2026

Expect clear skies in Lewistown, Montana with a maximum temperature of 31°C, moderate levels of heat & humidity, maximum UV of 7 (High) and 14 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the south-east.

31
°C maximum temperature
13
°C minimum temperature
clear skies
14
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
M
moderate heat & humidity
12
kph wind from SE

Lewistown weather for Saturday 8th August 2026

31
°C maximum temperature
15
°C minimum temperature
clear skies
14
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
M
moderate heat & humidity
19
kph wind from NW

Lewistown weather for Sunday 9th August 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 29°C, low levels of heat & humidity, maximum UV of 7 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 22 kph from the north-west.

29
°C maximum temperature
14
°C minimum temperature
scattered clouds
12
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
22
kph wind from NW

Lewistown weather for Monday 10th August 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 30°C, low 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 13 kph from the south-east.

30
°C maximum temperature
12
°C minimum temperature
scattered clouds
8
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
13
kph wind from SE

Lewistown weather for Tuesday 11th August 2026

Expect scattered clouds in Lewistown, Montana with a maximum temperature of 29°C, low levels of heat & humidity, maximum UV of 7 (High) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the north.