Great Falls weather live forecast

Today's maximum temperature in Great Falls is expected to be 30°C. Select a day from the live weather forecast for Great Falls, Montana, USA for more weather parameters.

Friday
25th Sep
30

13

10

5
Saturday
26th Sep
16

6

8

4
Sunday
27th Sep
16

3

0

4
Monday
28th Sep
20

4

10

4
Tuesday
29th Sep
19

5

10

4

5-day weather forecast updated at 04:00 on Friday 25th September 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 Friday 25th September 2026

Expect scattered clouds in Great Falls, Montana with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 5 (Moderate) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 28 kph from the south.

30
°C maximum temperature
13
°C minimum temperature
scattered clouds
10
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
M
moderate heat & humidity
28
kph wind from S

Great Falls weather for Saturday 26th September 2026

Expect scattered clouds in Great Falls, Montana with a maximum temperature of 16°C, maximum UV of 4 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 35 kph from the south-west.

16
°C maximum temperature
6
°C minimum temperature
scattered clouds
8
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
35
kph wind from SW

Great Falls weather for Sunday 27th September 2026

Expect overcast skies in Great Falls, Montana with a maximum temperature of 16°C, maximum UV of 4 (Moderate) and no hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the north-east.

16
°C maximum temperature
3
°C minimum temperature
overcast skies
0
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
12
kph wind from NE

Great Falls weather for Monday 28th September 2026

Expect scattered clouds in Great Falls, Montana with a maximum temperature of 20°C, maximum UV of 4 (Moderate) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the south-west.

20
°C maximum temperature
4
°C minimum temperature
scattered clouds
10
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
16
kph wind from SW

Great Falls weather for Tuesday 29th September 2026

Expect scattered clouds in Great Falls, Montana with a maximum temperature of 19°C, maximum UV of 4 (Moderate) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 32 kph from the south-west.