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.

Tuesday
22nd Sep
26

10

11

5
Wednesday
23rd Sep
25

12

10

5
Thursday
24th Sep
28

10

12

5
Friday
25th Sep
29

15

11

5
Saturday
26th Sep
16

6

3

5

5-day weather forecast updated at 04:00 on Tuesday 22nd September 2026 GMT

More about Great Falls

Great Falls by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Montana

Crystal Ski: Top ski deals to USA

Sale

Save on skiing holidays to the USA in winter 2025/2026
Book early with Crystal Ski for the best deals
Filter by promotional offers, duration, board basis & more

Go to Crystal Ski deal >>

View all Crystal Ski offers

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 Tuesday 22nd September 2026

Expect scattered clouds in Great Falls, Montana with a maximum temperature of 26°C, maximum UV of 5 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the south-west.

26
°C maximum temperature
10
°C minimum temperature
scattered clouds
11
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
26
°C wind chill
13
kph wind from SW

Great Falls weather for Wednesday 23rd September 2026

Expect scattered clouds in Great Falls, Montana with a maximum temperature of 25°C, maximum UV of 5 (Moderate) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 21 kph from the south-west.

25
°C maximum temperature
12
°C minimum temperature
scattered clouds
10
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
21
kph wind from SW

Great Falls weather for Thursday 24th September 2026

Expect clear skies in Great Falls, Montana with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 5 (Moderate) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the south.

28
°C maximum temperature
10
°C minimum temperature
clear skies
12
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
L
low heat & humidity
16
kph wind from S

Great Falls weather for Friday 25th September 2026

Expect scattered clouds in Great Falls, Montana with a maximum temperature of 29°C, low levels of heat & humidity, maximum UV of 5 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 23 kph from the south.

29
°C maximum temperature
15
°C minimum temperature
scattered clouds
11
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
L
low heat & humidity
23
kph wind from S

Great Falls weather for Saturday 26th September 2026

Expect broken clouds in Great Falls, Montana with a maximum temperature of 16°C, maximum UV of 5 (Moderate) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 32 kph from the west.