Missoula (MT)
September
Weather in Missoula, Montana for September 2027
Your guide to Missoula weather in September - trends and predictions
In general, the average temperature in Missoula at the beginning of September is 26.8 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 21.7 °C by the end of September.
Missoula experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 151.4 mm.
Is September a good time to visit Missoula? check out the best time to travel to Missoula page.
✨ Is September a good time to visit Missoula? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
23
Dry days
7
Rainy days
0
Snow days
23°/9°
Temperatures
11 km/h
Avg max wind
52 %
Avg humidity
Missoula Weather September
Move between months or click on a day
Temperatures trend during September in Missoula
See the weather trend as well as the moving average line
September weather in Missoula day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Overcast | 32° /13° | 0.2 mm | 6.8 | |
| Sept. 2 |  Light rain | 29° /12° | 5.3 mm | 5 | |
| Sept. 3 | Light rain | 25° /13° | 5.6 mm | 5 | |
| Sept. 4 |  Moderate rain | 25° /11° | 11.6 mm | 5 | |
| Sept. 5 | Light rain | 26° /10° | 4 mm | 5 | |
| Sept. 6 | Moderate rain | 27° /10° | 21.7 mm | 5 | |
| Sept. 7 |  Heavy rain | 24° /11° | 46.2 mm | 5 | |
| Sept. 8 |  Sunny | 25° /9° | 0 mm | 6.1 | |
| Sept. 9 | Sunny | 26° /10° | 0.6 mm | 6 | |
| Sept. 10 |  Patchy rain possible | 27° /11° | 0 mm | 5.9 | |
| Sept. 11 |  Moderate or heavy rain shower | 22° /11° | 6.6 mm | 4 | |
| Sept. 12 | Moderate rain | 17° /10° | 12.2 mm | 3 | |
| Sept. 13 | Patchy rain possible | 19° /8° | 1.2 mm | 4 | |
| Sept. 14 | Light rain | 19° /7° | 3.2 mm | 4 | |
| Sept. 15 | Patchy rain possible | 17° /7° | 1.5 mm | 3 | |
| Sept. 16 | Patchy rain possible | 23° /8° | 1.2 mm | 5 | |
| Sept. 17 | Light rain | 22° /9° | 4.6 mm | 5 | |
| Sept. 18 | Moderate rain | 21° /10° | 20.9 mm | 4 | |
| Sept. 19 |  Partly cloudy | 22° /10° | 0.4 mm | 5 | |
| Sept. 20 | Sunny | 22° /9° | 0 mm | 5 | |
| Sept. 21 |  Cloudy | 21° /8° | 0 mm | 4.9 | |
| Sept. 22 | Overcast | 21° /7° | 0 mm | 4 | |
| Sept. 23 | Partly cloudy | 23° /9° | 0 mm | 4.8 | |
| Sept. 24 | Sunny | 26° /9° | 0 mm | 4.7 | |
| Sept. 25 | Partly cloudy | 27° /10° | 0.1 mm | 4.6 | |
| Sept. 26 | Patchy rain possible | 18° /10° | 1.7 mm | 4 | |
| Sept. 27 | Sunny | 21° /5° | 0 mm | 4 | |
| Sept. 28 | Sunny | 24° /7° | 0 mm | 4.3 | |
| Sept. 29 | Overcast | 21° /8° | 0.1 mm | 4 | |
| Sept. 30 | Light rain | 15° /9° | 2.6 mm | 3 | |
| Next | |||||
Important Notice
Our weather forecast for Missoula 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 Missoula forecast closer to your planned date for the most up-to-date weather information.
Change Month
Missoula in September - FAQ
What are the expected maximum and minimum temperatures in Missoula during September?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 9°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Missoula during September?
Significant rainfall exceeding 151.4 mm is expected in Missoula during September, occurring over more than 7 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Missoula during September?
The average wind speed in Missoula during September is 11 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Missoula
Explore the daily rainfall trends and prepare for Missoulas September weather 💧
Typically, Missoula has 7 rainy days in September with a total of 151.4 mm of rainfall.
UV exposure in Missoula during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Quick links
More Missoula weather pages
You are here
Where is Missoula?Get accurate weather forecasts for Missoula, located at latitude 46.872 and longitude -113.994. Stay updated with localized weather information tailored for Missoula.
Found a mistake?
We appreciate your attention to details. Tell us here.