Great Falls weather live forecast

Today's maximum temperature in Great Falls is expected to be 16°C. Select a day from the live weather forecast for Great Falls, Montana, USA for more weather parameters.

Wednesday
16th Sep
16

7

8

3
Thursday
17th Sep
22

6

8

5
Friday
18th Sep
21

11

4

4
Saturday
19th Sep
19

10

2

4
Sunday
20th Sep
23

8

12

5

5-day weather forecast updated at 04:00 on Wednesday 16th 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

GO Airport Shuttle discount code: 5% off airport transfers

Discount Code

Save EXTRA 5% on airport transfers worldwide
Book private taxis & shuttle buses with discount code
Enter in coupon box on 'Reservations' page

Show discount code

******WEB

Redeem GO Airport Shuttle discount code >>

Expires at 23:59 on Thursday 31st Dec 2026

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 16th September 2026

Expect scattered clouds in Great Falls, Montana with a maximum temperature of 16°C, maximum UV of 3 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 14 kph from the north-west.

16
°C maximum temperature
7
°C minimum temperature
scattered clouds
8
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
16
°C wind chill
14
kph wind from NW

Great Falls weather for Thursday 17th September 2026

Expect scattered clouds in Great Falls, Montana with a maximum temperature of 22°C, maximum UV of 5 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 19 kph from the north-east.

22
°C maximum temperature
6
°C minimum temperature
scattered clouds
8
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
19
kph wind from NE

Great Falls weather for Friday 18th September 2026

Expect isolated thunderstorms in Great Falls, Montana with a maximum temperature of 21°C, maximum UV of 4 (Moderate) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 65% chance of some rain and a gentle breeze of 15 kph from the north-east.

21
°C maximum temperature
11
°C minimum temperature
isolated thunderstorms
4
hours of sunshine
4
UV index (Moderate)
65
% chance of some rain
<2
mm of rainfall expected
21
°C wind chill
15
kph wind from NE

Great Falls weather for Saturday 19th September 2026

Expect isolated thunderstorms in Great Falls, Montana with a maximum temperature of 19°C, maximum UV of 4 (Moderate) and 2 hours of bright sunshine. There are 2-5 mm of rainfall expected with 38% chance of some rain and a light breeze of 12 kph from the south-west.

19
°C maximum temperature
10
°C minimum temperature
isolated thunderstorms
2
hours of sunshine
4
UV index (Moderate)
38
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
12
kph wind from SW

Great Falls weather for Sunday 20th September 2026

Expect scattered clouds in Great Falls, Montana with a maximum temperature of 23°C, maximum UV of 5 (Moderate) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the south-west.