Billings (MT)
September
Weather in Billings, Montana for September 2026
Your guide to Billings weather in September - trends and predictions
In general, the average temperature in Billings at the beginning of September is 29.9 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 27.9 °F by the end of September.
With an average of 2 rainy days, Billings experiences minimal rainfall in September.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
28
Dry days
2
Rainy days
0
Snow days
27°/13°
Temperatures
21 km/h
Avg max wind
40 %
Avg humidity
Billings Weather September
Move between months or click on a day
Temperatures trend during September in Billings
See the weather trend as well as the moving average line
September weather in Billings day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 33° /12° | 0 mm | 8 | |
| Sept. 2 | Sunny | 35° /16° | 0 mm | 9 | |
| Sept. 3 |  Overcast | 29° /16° | 0 mm | 7 | |
| Sept. 4 |  Cloudy | 26° /13° | 0 mm | 6 | |
| Sept. 5 | Sunny | 26° /9° | 0 mm | 7 | |
| Sept. 6 | Sunny | 29° /8° | 0 mm | 8 | |
| Sept. 7 | Sunny | 31° /11° | 0 mm | 8 | |
| Sept. 8 | Sunny | 33° /15° | 0 mm | 8 | |
| Sept. 9 |  Partly cloudy | 32° /16° | 0 mm | 8 | |
| Sept. 10 | Overcast | 30° /14° | 0 mm | 7 | |
| Sept. 11 |  Patchy rain possible | 31° /13° | 4.4 mm | 7 | |
| Sept. 12 |  Heavy rain at times | 23° /11° | 4.5 mm | 5 | |
| Sept. 13 | Cloudy | 20° /13° | 31.6 mm | 5 | |
| Sept. 14 | Overcast | 27° /8° | 0 mm | 6 | |
| Sept. 15 | Partly cloudy | 27° /12° | 4.2 mm | 6 | |
| Sept. 16 | Sunny | 22° /11° | 9.6 mm | 6 | |
| Sept. 17 | Patchy rain possible | 25° /13° | 0.1 mm | 6 | |
| Sept. 18 |  Moderate or heavy rain shower | 19° /9° | 29.5 mm | 4 | |
| Sept. 19 | Partly cloudy | 25° /10° | 0 mm | 6 | |
| Sept. 20 | Sunny | 26° /10° | 0 mm | 7 | |
| Sept. 21 | Sunny | 23° /7° | 0 mm | 6 | |
| Sept. 22 | Sunny | 21° /7° | 6.8 mm | 5 | |
| Sept. 23 | Overcast | 24° /7° | 0 mm | 6 | |
| Sept. 24 | Sunny | 27° /8° | 0 mm | 7 | |
| Sept. 25 | Sunny | 31° /11° | 0 mm | 8 | |
| Sept. 26 | Sunny | 27° /13° | 0 mm | 7 | |
| Sept. 27 | Sunny | 28° /7° | 0 mm | 7 | |
| Sept. 28 | Sunny | 29° /9° | 0 mm | 7 | |
| Sept. 29 | Sunny | 31° /11° | 0 mm | 8 | |
| Sept. 30 | Sunny | 22° /8° | 0 mm | 6 | |
| Next | |||||
Important Notice
Our weather forecast for Billings 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 Billings forecast closer to your planned date for the most up-to-date weather information.
Change Month
Billings in September - FAQ
What are the expected maximum and minimum temperatures in Billings during September?
Enjoy moderate daytime temperatures of up to 27° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Billings during September?
Moderate rainfall is anticipated in Billings during September, with a total of 68.4 mm spread over approximately 2 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Billings during September?
The average wind speed in Billings during September is 21 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Billings
Explore the daily rainfall trends and prepare for Billingss September weather 💧
UV exposure in Billings during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Quick links
More Billings weather pages
You are here
Where is Billings?Get accurate weather forecasts for Billings, located at latitude 45.783 and longitude -108.501. Stay updated with localized weather information tailored for Billings.
Found a mistake?
We appreciate your attention to details. Tell us here.