Cascade County (Great Falls)
September
Weather in Cascade County, Montana for September 2027
Your guide to Cascade County weather in September - trends and predictions
Cascade County experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 168.3 mm.
Is September a good time to visit Cascade County? check out the best time to travel to Cascade County page.
✨ Is September a good time to visit Cascade County? – Ask the AI Weatherman
Rain 🌧️
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24
Dry days
6
Rainy days
0
Snow days
24°/10°
Temperatures
23 km/h
Avg max wind
49 %
Avg humidity
Cascade County Weather September
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Temperatures trend during September in Cascade County
See the weather trend as well as the moving average line
September weather in Cascade County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 32° /11° | 0 mm | 6 | |
| Sept. 2 |  Overcast | 33° /14° | 0.1 mm | 5 | |
| Sept. 3 | Sunny | 27° /12° | 0 mm | 6 | |
| Sept. 4 | Overcast | 22° /12° | 0.2 mm | 6 | |
| Sept. 5 | Sunny | 23° /7° | 0 mm | 6.3 | |
| Sept. 6 | Sunny | 24° /8° | 0.9 mm | 4 | |
| Sept. 7 |  Thundery outbreaks possible | 22° /10° | 118.4 mm | 4 | |
| Sept. 8 | Thundery outbreaks possible | 23° /13° | 0.3 mm | 5 | |
| Sept. 9 |  Patchy rain possible | 26° /10° | 1.9 mm | 5.9 | |
| Sept. 10 | Thundery outbreaks possible | 28° /13° | 0 mm | 5 | |
| Sept. 11 |  Moderate rain | 20° /10° | 24.4 mm | 3 | |
| Sept. 12 |  Light rain | 19° /9° | 3 mm | 3 | |
| Sept. 13 | Patchy rain possible | 22° /8° | 1.2 mm | 5 | |
| Sept. 14 | Patchy rain possible | 21° /8° | 2 mm | 4 | |
| Sept. 15 | Patchy rain possible | 18° /11° | 2.2 mm | 2 | |
| Sept. 16 |  Cloudy | 20° /10° | 0 mm | 5 | |
| Sept. 17 | Sunny | 24° /9° | 0 mm | 5 | |
| Sept. 18 | Sunny | 25° /9° | 0 mm | 4 | |
| Sept. 19 | Overcast | 22° /11° | 0 mm | 3 | |
| Sept. 20 | Sunny | 26° /9° | 0.1 mm | 4.9 | |
| Sept. 21 | Patchy rain possible | 27° /10° | 1.2 mm | 4.8 | |
| Sept. 22 | Moderate rain | 23° /11° | 10.9 mm | 3 | |
| Sept. 23 | Sunny | 26° /8° | 0 mm | 4 | |
| Sept. 24 | Sunny | 29° /10° | 0 mm | 4 | |
| Sept. 25 | Sunny | 30° /11° | 0.1 mm | 4 | |
| Sept. 26 | Sunny | 20° /8° | 0 mm | 4 | |
| Sept. 27 | Sunny | 22° /5° | 0 mm | 3 | |
| Sept. 28 | Sunny | 25° /7° | 0 mm | 4 | |
| Sept. 29 | Sunny | 26° /10° | 0 mm | 2 | |
| Sept. 30 | Patchy rain possible | 20° /11° | 1.5 mm | 3 | |
| Next | |||||
Important Notice
Our weather forecast for Cascade County in September 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 Cascade County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Cascade County in September - FAQ
What are the expected maximum and minimum temperatures in Cascade County during September?
Enjoy moderate daytime temperatures of up to 24° and cooler nights around 10°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Cascade County during September?
Significant rainfall exceeding 168.3 mm is expected in Cascade County during September, occurring over more than 6 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Cascade County during September?
The average wind speed in Cascade County during September is 23 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Cascade County
Explore the daily rainfall trends and prepare for Cascade Countys September weather 💧
Typically, Cascade County has 6 rainy days in September with a total of 168.3 mm of rainfall.
UV exposure in Cascade County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Cascade County
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