Great Falls weather live forecast

Today's maximum temperature in Great Falls is expected to be 25°C. Select a day from the live weather forecast for Great Falls, Montana, USA for more weather parameters.

Friday
4th Sep
25

12

6

6
Saturday
5th Sep
23

10

3

6
Sunday
6th Sep
22

10

4

3
Monday
7th Sep
20

11

0

1
Tuesday
8th Sep
19

10

4

4

5-day weather forecast updated at 04:00 on Friday 4th 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 4th September 2026

Expect broken clouds in Great Falls, Montana with a maximum temperature of 25°C, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 19 kph from the west.

25
°C maximum temperature
12
°C minimum temperature
broken clouds
6
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
19
kph wind from W

Great Falls weather for Saturday 5th September 2026

Expect broken clouds in Great Falls, Montana with a maximum temperature of 23°C, maximum UV of 6 (High) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 22 kph from the north.

23
°C maximum temperature
10
°C minimum temperature
broken clouds
3
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
22
kph wind from N

Great Falls weather for Sunday 6th September 2026

Expect isolated thunderstorms in Great Falls, Montana with a maximum temperature of 22°C, maximum UV of 3 (Moderate) and 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 74% chance of some rain and a moderate breeze of 22 kph from the north-west.

22
°C maximum temperature
10
°C minimum temperature
isolated thunderstorms
4
hours of sunshine
3
UV index (Moderate)
74
% chance of some rain
<5
mm of rainfall expected
22
°C wind chill
22
kph wind from NW

Great Falls weather for Monday 7th September 2026

Expect isolated thunderstorms in Great Falls, Montana with a maximum temperature of 20°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 5-10 mm of rainfall expected with 78% chance of some rain and a moderate breeze of 28 kph from the south-west.

20
°C maximum temperature
11
°C minimum temperature
isolated thunderstorms
0
hours of sunshine
1
UV index (Low)
78
% chance of some rain
<10
mm of rainfall expected
20
°C wind chill
28
kph wind from SW

Great Falls weather for Tuesday 8th September 2026

Expect mostly cloudy with light rain in Great Falls, Montana with a maximum temperature of 19°C, maximum UV of 4 (Moderate) and 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 32% chance of some rain and a fresh breeze of 32 kph from the south-west.