Great Falls weather live forecast

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

Wednesday
26th Aug
31

12

11

6
Thursday
27th Aug
30

15

9

6
Friday
28th Aug
28

13

6

6
Saturday
29th Aug
25

11

7

6
Sunday
30th Aug
21

9

9

5

5-day weather forecast updated at 04:00 on Wednesday 26th August 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

Intrepid Travel discount code: £200 off small group tours

Discount Code

Save EXTRA £200 on select small group tours worldwide
Min spend of £1,500 per person. T&Cs apply
Travel before 30th June 2027 (inclusive)

Show discount code

******011

Redeem Intrepid Travel discount code >>

Expires at 23:59 on Monday 31st Aug 2026 · View all Intrepid Travel 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 Wednesday 26th August 2026

Expect scattered clouds in Great Falls, Montana with a maximum temperature of 31°C, moderate 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 14 kph from the south-west.

31
°C maximum temperature
12
°C minimum temperature
scattered clouds
11
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
M
moderate heat & humidity
14
kph wind from SW

Great Falls weather for Thursday 27th August 2026

Expect scattered clouds in Great Falls, Montana with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 6 (High) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 21 kph from the south-west.

30
°C maximum temperature
15
°C minimum temperature
scattered clouds
9
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
M
moderate heat & humidity
21
kph wind from SW

Great Falls weather for Friday 28th August 2026

Expect broken clouds in Great Falls, Montana with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 25 kph from the south-west.

28
°C maximum temperature
13
°C minimum temperature
broken clouds
6
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
25
kph wind from SW

Great Falls weather for Saturday 29th August 2026

Expect isolated thunderstorms in Great Falls, Montana with a maximum temperature of 25°C, maximum UV of 6 (High) and 7 hours of bright sunshine. There are 0-2 mm of rainfall expected with 28% chance of some rain and a moderate breeze of 27 kph from the west.

25
°C maximum temperature
11
°C minimum temperature
isolated thunderstorms
7
hours of sunshine
6
UV index (High)
28
% chance of some rain
<2
mm of rainfall expected
25
°C wind chill
27
kph wind from W

Great Falls weather for Sunday 30th August 2026

Expect isolated thunderstorms in Great Falls, Montana with a maximum temperature of 21°C, maximum UV of 5 (Moderate) and 9 hours of bright sunshine. There are 2-5 mm of rainfall expected with 28% chance of some rain and a moderate breeze of 22 kph from the west.