Bangor (ME)
September
Weather in Bangor, Maine for September 2025
Your guide to Bangor weather in September - trends and predictions
In general, the average temperature in Bangor at the beginning of September is 22.4 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 18.3 °F by the end of September.
With an average of 4 rainy days, Bangor experiences minimal rainfall in September.
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Temperatures
Rain 🌧️
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26
Dry days
4
Rainy days
0
Snow days
22°/12°
Temperatures
13 km/h
Avg max wind
74 %
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 | 23° /16° | 7.4 mm | 5 | |
| Sept. 2 |  Cloudy | 20° /11° | 0 mm | 5 | |
| Sept. 3 |  Sunny | 20° /8° | 0 mm | 6 | |
| Sept. 4 | Cloudy | 24° /11° | 0 mm | 5 | |
| Sept. 5 | Sunny | 25° /12° | 0 mm | 7 | |
| Sept. 6 |  Patchy rain possible | 23° /10° | 0.2 mm | 5 | |
| Sept. 7 | Patchy rain possible | 22° /12° | 0.1 mm | 5 | |
| Sept. 8 |  Overcast | 19° /10° | 0.4 mm | 4 | |
| Sept. 9 |  Partly cloudy | 20° /8° | 0 mm | 6 | |
| Sept. 10 | Partly cloudy | 19° /10° | 0 mm | 5 | |
| Sept. 11 | Partly cloudy | 23° /7° | 0 mm | 6 | |
| Sept. 12 | Partly cloudy | 25° /10° | 0 mm | 7 | |
| Sept. 13 | Patchy rain possible | 27° /11° | 0.1 mm | 6 | |
| Sept. 14 | Overcast | 24° /12° | 0 mm | 5 | |
| Sept. 15 | Sunny | 25° /11° | 0 mm | 7 | |
| Sept. 16 | Sunny | 28° /12° | 0 mm | 7 | |
| Sept. 17 | Overcast | 28° /14° | 0 mm | 6 | |
| Sept. 18 | Overcast | 26° /14° | 0 mm | 6 | |
| Sept. 19 | Overcast | 25° /14° | 0 mm | 6 | |
| Sept. 20 | Overcast | 18° /14° | 0 mm | 4 | |
| Sept. 21 | Cloudy | 18° /13° | 0 mm | 4 | |
| Sept. 22 | Cloudy | 17° /13° | 0 mm | 4 | |
| Sept. 23 | Overcast | 17° /12° | 0 mm | 4 | |
| Sept. 24 | Overcast | 18° /11° | 0 mm | 4 | |
| Sept. 25 | Patchy rain possible | 18° /12° | 0.2 mm | 4 | |
| Sept. 26 |  Moderate or heavy rain shower | 14° /11° | 50 mm | 3 | |
| Sept. 27 | Patchy rain possible | 20° /12° | 3.8 mm | 5 | |
| Sept. 28 | Patchy rain possible | 19° /12° | 0.2 mm | 4 | |
| Sept. 29 | Overcast | 18° /11° | 0 mm | 4 | |
| Sept. 30 | Cloudy | 21° /15° | 0 mm | 5 | |
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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.
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Bangor in September - FAQ
What are the expected maximum and minimum temperatures in Bangor during September?
Enjoy moderate daytime temperatures of up to 22° 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 4 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 ☀️
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