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.

Tuesday
14th Jul
30

19

6

8
Wednesday
15th Jul
27

17

9

7
Thursday
16th Jul
30

17

12

8
Friday
17th Jul
33

17

12

8
Saturday
18th Jul
34

20

12

10

5-day weather forecast updated at 04:00 on Wednesday 15th July 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 Tuesday 14th July 2026

Expect sunshine and showers in Great Falls, Montana with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 6 hours of bright sunshine. There are 5-10 mm of rainfall expected with 54% chance of some rain and a moderate breeze of 27 kph from the north-east.

30
°C maximum temperature
19
°C minimum temperature
sunshine and showers
6
hours of sunshine
8
UV index (Very High)
54
% chance of some rain
<10
mm of rainfall expected
M
moderate heat & humidity
27
kph wind from NE

Great Falls weather for Wednesday 15th July 2026

Expect isolated thunderstorms in Great Falls, Montana with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 7 (High) and 9 hours of bright sunshine. There are 2-5 mm of rainfall expected with 37% chance of some rain and a gentle breeze of 14 kph from the west.

27
°C maximum temperature
17
°C minimum temperature
isolated thunderstorms
9
hours of sunshine
7
UV index (High)
37
% chance of some rain
<5
mm of rainfall expected
L
low heat & humidity
14
kph wind from W

Great Falls weather for Thursday 16th July 2026

Expect scattered clouds in Great Falls, Montana with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 22 kph from the east.

30
°C maximum temperature
17
°C minimum temperature
scattered clouds
12
hours of sunshine
8
UV index (Very High)
0
mm of rainfall expected
M
moderate heat & humidity
22
kph wind from E

Great Falls weather for Friday 17th July 2026

Expect isolated thunderstorms in Great Falls, Montana with a maximum temperature of 33°C, high levels of heat & humidity, maximum UV of 8 (Very High) and 12 hours of bright sunshine. There are 0-2 mm of rainfall expected with 49% chance of some rain and a gentle breeze of 18 kph from the east.

33
°C maximum temperature
17
°C minimum temperature
isolated thunderstorms
12
hours of sunshine
8
UV index (Very High)
49
% chance of some rain
<2
mm of rainfall expected
M
moderate heat & humidity
18
kph wind from E

Great Falls weather for Saturday 18th July 2026

Expect isolated thunderstorms in Great Falls, Montana with a maximum temperature of 34°C, high levels of heat & humidity, maximum UV of 10 (Very High) and 12 hours of bright sunshine. There are 0-2 mm of rainfall expected with 21% chance of some rain and a gentle breeze of 19 kph from the west.