Bangor (ME)
September
Weather in Bangor, Maine for September 2025
Your guide to Bangor weather in September - trends and predictions
Until now, September 2025 in Bangor is slightly cooler than the historical average by -1 °F.
The forecast for the next days in Bangor predicts temperatures to be around 23 °F, close to the historical average.
In general, the average temperature in Bangor at the beginning of September is 21.7 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 21.1 °F by the end of September.
With an average of 3 rainy days, Bangor experiences minimal rainfall in September.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
27
Dry days
3
Rainy days
0
Snow days
21°/12°
Temperatures
13 km/h
Avg max wind
73 %
Avg humidity
Bangor Weather September
Move between months or click on a day
Temperatures trend during September in Bangor
See the weather trend as well as the moving average line
September weather in Bangor day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Heavy rain at times | 25° /14° | 3.7 mm | 6 | |
| Sept. 2 |  Cloudy | 22° /12° | 0 mm | 5 | |
| Sept. 3 |  Sunny | 22° /10° | 0 mm | 6 | |
| Sept. 4 | Cloudy | 20° /11° | 0 mm | 5 | |
| Sept. 5 | Sunny | 22° /13° | 0 mm | 6 | |
| Sept. 6 |  Patchy rain possible | 22° /13° | 0.1 mm | 5 | |
| Sept. 7 | Patchy rain possible | 19° /11° | 13 mm | 5 | |
| Sept. 8 |  Overcast | 21° /9° | 0.2 mm | 5 | |
| Sept. 9 |  Partly cloudy | 21° /7° | 0 mm | 6 | |
| Sept. 10 | Partly cloudy | 21° /9° | 0 mm | 5 | |
| Sept. 11 | Partly cloudy | 23° /7° | 0 mm | 6 | |
| Sept. 12 | Partly cloudy | 23° /9° | 0 mm | 7 | |
| Sept. 13 | Patchy rain possible | 24° /10° | 0.1 mm | 6 | |
| Sept. 14 | Overcast | 24° /12° | 0 mm | 5 | |
| Sept. 15 | Sunny | 25° /7° | 0 mm | 1.3 | |
| Sept. 16 | Sunny | 26° /10° | 0 mm | 1.3 | |
| Sept. 17 | Sunny | 25° /11° | 0 mm | 1.3 | |
| Sept. 18 |  Mist | 27° /10° | 0 mm | 1.1 | |
| Sept. 19 | Sunny | 21° /9° | 0 mm | 0 | |
| Sept. 20 | Sunny | 18° /5° | 0 mm | 4 | |
| Sept. 21 | Sunny | 22° /5° | 0 mm | 4 | |
| Sept. 22 | Partly cloudy | 24° /8° | 0 mm | 4 | |
| Sept. 23 | Partly cloudy | 24° /9° | 0 mm | 4 | |
| Sept. 24 | Partly cloudy | 19° /12° | 0 mm | 4 | |
| Sept. 25 | Sunny | 23° /10° | 0 mm | 4 | |
| Sept. 26 | Sunny | 23° /9° | 0 mm | 4 | |
| Sept. 27 | Overcast | 22° /9° | 0 mm | 3 | |
| Sept. 28 | Partly cloudy | 22° /11° | 0 mm | 5 | |
| Sept. 29 | Overcast | 18° /11° | 0 mm | 4 | |
| Sept. 30 | Cloudy | 21° /15° | 0 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for Bangor 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 Bangor forecast closer to your planned date for the most up-to-date weather information.
Change Month
Bangor in September - FAQ
What are the expected maximum and minimum temperatures in Bangor during September?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Bangor during September?
Moderate rainfall is anticipated in Bangor during September, with a total of 62.3 mm spread over approximately 3 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Bangor during September?
The average wind speed in Bangor during September is 13 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Bangor
Explore the daily rainfall trends and prepare for Bangors September weather 💧
UV exposure in Bangor during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Quick links
More Bangor weather pages
You are here
Where is Bangor?Get accurate weather forecasts for Bangor, located at latitude 44.799 and longitude -68.773. Stay updated with localized weather information tailored for Bangor.
Found a mistake?
We appreciate your attention to details. Tell us here.