Great Falls weather live forecast

Today's maximum temperature in Great Falls is expected to be 26°C. Select a day from the live weather forecast for Great Falls, Montana, USA for more weather parameters.

Monday
17th Aug
26

13

8

6
Tuesday
18th Aug
27

15

10

6
Wednesday
19th Aug
27

12

14

7
Thursday
20th Aug
28

11

7

7
Friday
21st Aug
29

13

11

6

5-day weather forecast updated at 04:00 on Monday 17th August 2026 GMT

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The 5-day weather forecast for Montana (Great Falls) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Great Falls weather forecast by day

Below are the detailed weather forecasts for Great Falls for the next 5 days.

Great Falls weather for Monday 17th August 2026

Expect scattered clouds in Great Falls, Montana with a maximum temperature of 26°C, low levels of heat & humidity, maximum UV of 6 (High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the south-west.

26
°C maximum temperature
13
°C minimum temperature
scattered clouds
8
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
15
kph wind from SW

Great Falls weather for Tuesday 18th August 2026

Expect broken clouds in Great Falls, Montana with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 6 (High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 20 kph from the south-west.

27
°C maximum temperature
15
°C minimum temperature
broken clouds
10
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
20
kph wind from SW

Great Falls weather for Wednesday 19th August 2026

Expect clear skies in Great Falls, Montana with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 7 (High) and 14 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 19 kph from the west.

27
°C maximum temperature
12
°C minimum temperature
clear skies
14
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
19
kph wind from W

Great Falls weather for Thursday 20th August 2026

Expect scattered clouds in Great Falls, Montana with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 7 (High) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the north-east.

28
°C maximum temperature
11
°C minimum temperature
scattered clouds
7
hours of sunshine
7
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
17
kph wind from NE

Great Falls weather for Friday 21st August 2026

Expect scattered clouds in Great Falls, Montana with a maximum temperature of 29°C, low levels of heat & humidity, maximum UV of 6 (High) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the north-east.