Great Falls (MT)
August
Weather in Great Falls, Montana for August 2026
Your guide to Great Falls weather in August - trends and predictions
In general, the average temperature in Great Falls at the beginning of August is 27.6 °F. As the month progressed, temperatures tended to slightly increase, reaching an average of 27.7 °F by the end of August.
Great Falls experiences moderate rainfall in August, with an average of 6 rainy days and a total precipitation of 28.5 mm.
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Temperatures
Rain 🌧️
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25
Dry days
6
Rainy days
0
Snow days
28°/13°
Temperatures
28 km/h
Avg max wind
51 %
Avg humidity
Great Falls Weather August
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Temperatures trend during August in Great Falls
See the weather trend as well as the moving average line
August weather in Great Falls day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Aug. 1 |  Thundery outbreaks possible | 31° /15° | 0 mm | 10 | |
| Aug. 2 |  Moderate or heavy rain shower | 27° /15° | 6.7 mm | 10 | |
| Aug. 3 |  Partly cloudy | 28° /15° | 0 mm | 10 | |
| Aug. 4 | Thundery outbreaks possible | 26° /12° | 0 mm | 10 | |
| Aug. 5 | Moderate or heavy rain shower | 26° /13° | 7.2 mm | 7 | |
| Aug. 6 |  Overcast | 30° /11° | 0 mm | 10 | |
| Aug. 7 | Thundery outbreaks possible | 25° /15° | 8.2 mm | 9 | |
| Aug. 8 | Thundery outbreaks possible | 22° /13° | 0 mm | 5 | |
| Aug. 9 |  Cloudy | 25° /14° | 0 mm | 5 | |
| Aug. 10 |  Sunny | 29° /12° | 0 mm | 9 | |
| Aug. 11 | Sunny | 29° /14° | 0 mm | 9 | |
| Aug. 12 | Partly cloudy | 31° /13° | 0 mm | 9 | |
| Aug. 13 | Sunny | 33° /14° | 0 mm | 9 | |
| Aug. 14 | Partly cloudy | 28° /14° | 0 mm | 9 | |
| Aug. 15 | Partly cloudy | 28° /11° | 0 mm | 9 | |
| Aug. 16 | Sunny | 32° /13° | 3.3 mm | 9 | |
| Aug. 17 |  Mist | 28° /13° | 0 mm | 9 | |
| Aug. 18 | Mist | 31° /13° | 0 mm | 8 | |
| Aug. 19 | Sunny | 35° /15° | 0 mm | 8 | |
| Aug. 20 | Cloudy | 32° /16° | 0 mm | 8 | |
| Aug. 21 | Partly cloudy | 26° /12° | 0 mm | 8 | |
| Aug. 22 | Overcast | 23° /13° | 0 mm | 8 | |
| Aug. 23 | Sunny | 27° /8° | 0 mm | 8 | |
| Aug. 24 | Cloudy | 28° /9° | 0 mm | 8 | |
| Aug. 25 | Sunny | 29° /9° | 0 mm | 8 | |
| Aug. 26 | Sunny | 32° /10° | 0 mm | 8 | |
| Aug. 27 | Overcast | 28° /14° | 0 mm | 3 | |
| Aug. 28 | Overcast | 24° /14° | 0 mm | 2 | |
| Aug. 29 | Mist | 22° /15° | 1.4 mm | 5 | |
| Aug. 30 | Fog | 28° /14° | 1.7 mm | 7 | |
| Aug. 31 | Sunny | 31° /11° | 0 mm | 7 | |
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Important Notice
Our weather forecast for Great Falls in August is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Great Falls forecast closer to your planned date for the most up-to-date weather information.
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Great Falls in August - FAQ
What are the expected maximum and minimum temperatures in Great Falls during August?
Enjoy moderate daytime temperatures of up to 28° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Great Falls during August?
In August, Great Falls can expect light to moderate rainfall, totaling 28.5 mm across approximately 6 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Great Falls during August?
The average wind speed in Great Falls during August is 28 km/h, suggesting breezy to windy conditions, depending on your activities.
August rainfall patterns in Great Falls
Explore the daily rainfall trends and prepare for Great Fallss August weather 💧
Typically, Great Falls has 6 rainy days in August with a total of 28.5 mm of rainfall.
UV exposure in Great Falls during August
Stay informed about UV levels for safe outdoor activities throughout the month of August ☀️
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