Bangor (ME)
September
Weather in Bangor, Maine for September 2026
Your guide to Bangor weather in September - trends and predictions
Until now, September 2026 in Bangor is slightly cooler than the historical average by 0.6 °F.
The forecast for the next days in Bangor predicts temperatures to be around 16 °F, close to the historical average.
In general, the average temperature in Bangor at the beginning of September is 22.1 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 15.3 °F by the end of September.
Bangor experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 137.8 mm.
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Temperatures
Rain 🌧️
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24
Dry days
6
Rainy days
0
Snow days
21°/11°
Temperatures
13 km/h
Avg max wind
73 %
Avg humidity
Bangor Weather September
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Temperatures trend during September in Bangor
See the weather trend as well as the moving average line
September weather in Bangor day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Heavy rain at times | 25° /12° | 2.5 mm | 6 | |
| Sept. 2 |  Overcast | 23° /11° | 0 mm | 5 | |
| Sept. 3 |  Sunny | 21° /11° | 53.4 mm | 4 | |
| Sept. 4 |  Cloudy | 21° /12° | 6.4 mm | 4 | |
| Sept. 5 | Sunny | 22° /13° | 0.1 mm | 5 | |
| Sept. 6 |  Patchy rain possible | 21° /12° | 0.1 mm | 5 | |
| Sept. 7 | Patchy rain possible | 22° /10° | 8.7 mm | 5 | |
| Sept. 8 | Overcast | 22° /10° | 0.8 mm | 4 | |
| Sept. 9 |  Partly cloudy | 20° /7° | 0.5 mm | 4 | |
| Sept. 10 | Partly cloudy | 23° /11° | 6 mm | 5 | |
| Sept. 11 | Partly cloudy | 23° /8° | 0 mm | 5 | |
| Sept. 12 | Sunny | 24° /8° | 0 mm | 6 | |
| Sept. 13 | Patchy rain possible | 22° /10° | 3.5 mm | 4 | |
| Sept. 14 | Overcast | 23° /11° | 0 mm | 5 | |
| Sept. 15 | Sunny | 23° /10° | 0 mm | 6 | |
| Sept. 16 | Sunny | 26° /12° | 0 mm | 6 | |
| Sept. 17 | Overcast | 25° /12° | 1.6 mm | 4 | |
| Sept. 18 | Overcast | 23° /11° | 1.6 mm | 5 | |
| Sept. 19 | Overcast | 21° /9° | 0 mm | 5 | |
| Sept. 20 | Overcast | 16° /6° | 5.9 mm | 3.6 | |
| Sept. 21 | Sunny | 18° /5° | 0.6 mm | 5 | |
| Sept. 22 | Overcast | 16° /4° | 0 mm | 3.8 | |
| Sept. 23 | Sunny | 18° /3° | 0 mm | 4.7 | |
| Sept. 24 | Sunny | 20° /3° | 3.4 mm | 5 | |
| Sept. 25 | Light rain shower | 11° /7° | 17.4 mm | 3 | |
| Sept. 26 | Light rain shower | 12° /10° | 12.9 mm | 3 | |
| Sept. 27 | Overcast | 11° /9° | 0.4 mm | 3 | |
| Sept. 28 | Sunny | 21° /7° | 0 mm | 6 | |
| Sept. 29 | Overcast | 19° /10° | 0 mm | 5 | |
| Sept. 30 |  Fog | 13° /11° | 1.2 mm | 3 | |
| 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 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Bangor during September?
Significant rainfall exceeding 137.8 mm is expected in Bangor during September, occurring over more than 6 days. Preparing for wet conditions is recommended in your planning.
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 💧
Typically, Bangor has 6 rainy days in September with a total of 137.8 mm of rainfall.
UV exposure in Bangor during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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