Bangor
September
Weather in Bangor 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 16.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 13.6 °C by the end of September.
Expect significant rainfall in Bangor during September, with an average of 19 rainy days.
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11
Dry days
19
Rainy days
0
Snow days
16°/12°
Temperatures
29 km/h
Avg max wind
85 %
Avg humidity
Bangor in September average weather
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| Mon. | Tue. | Wed. | Thu. | Fri. | Sat. | Sun. |
|---|---|---|---|---|---|---|
| 1  15° | 2 16° | 3  17° | 4 16° | 5  17° | 6 18° | 7 18° |
| 8 18° | 9  18° | 10 16° | 11 14° | 12 13° | 13  14° | 14 16° |
| 15  14° | 16  15° | 17 16° | 18 15° | 19  16° | 20 16° | 21 15° |
| 22 14° | 23 14° | 24 15° | 25 13° | 26  13° | 27 13° | 28 14° |
| 29 14° | 30 13° |
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Temperatures trend during September in Bangor
See the weather trend as well as the moving average line
September weather day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| 1 Sept. | Light rain shower | 15° /13° | 1.3 mm | 4 | |
| 2 Sept. | Patchy rain possible | 16° /11° | 4.7 mm | 4 | |
| 3 Sept. | Sunny | 17° /10° | 0.4 mm | 5 | |
| 4 Sept. | Sunny | 16° /11° | 0.8 mm | 4 | |
| 5 Sept. | Partly cloudy | 17° /12° | 0 mm | 5 | |
| 6 Sept. | Partly cloudy | 18° /13° | 0 mm | 5 | |
| 7 Sept. | Light rain shower | 18° /14° | 1.1 mm | 5 | |
| 8 Sept. | Patchy rain possible | 18° /13° | 0.8 mm | 5 | |
| 9 Sept. | Mist | 18° /13° | 0.2 mm | 5 | |
| 10 Sept. | Light rain shower | 16° /11° | 5 mm | 4 | |
| 11 Sept. | Light rain shower | 14° /10° | 3.9 mm | 4 | |
| 12 Sept. | Partly cloudy | 13° /8° | 1.5 mm | 4 | |
| 13 Sept. | Overcast | 14° /8° | 1.3 mm | 4 | |
| 14 Sept. | Overcast | 16° /11° | 0.2 mm | 4 | |
| 15 Sept. | Moderate rain | 14° /10° | 9.2 mm | 4 | |
| 16 Sept. | Cloudy | 15° /10° | 0.1 mm | 4 | |
| 17 Sept. | Light rain shower | 16° /12° | 10.2 mm | 5 | |
| 18 Sept. | Patchy rain possible | 15° /11° | 2.7 mm | 4 | |
| 19 Sept. | Light rain | 16° /10° | 4.4 mm | 5 | |
| 20 Sept. | Patchy light drizzle | 16° /10° | 2.1 mm | 5 | |
| 21 Sept. | Light rain shower | 15° /9° | 0.6 mm | 4 | |
| 22 Sept. | Light rain shower | 14° /10° | 1.6 mm | 4 | |
| 23 Sept. | Light drizzle | 14° /9° | 1.1 mm | 4 | |
| 24 Sept. | Moderate rain | 15° /11° | 7.3 mm | 4 | |
| 25 Sept. | Patchy rain possible | 13° /11° | 2 mm | 4 | |
| 26 Sept. | Moderate or heavy rain with thunder | 13° /9° | 16.4 mm | 4 | |
| 27 Sept. | Light rain shower | 13° /8° | 10 mm | 3 | |
| 28 Sept. | Light rain shower | 14° /8° | 1.8 mm | 4 | |
| 29 Sept. | Cloudy | 14° /10° | 1.2 mm | 4 | |
| 30 Sept. | Light rain shower | 13° /9° | 15.2 mm | 4 | |
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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.
Bangor in September - FAQ
What are the expected maximum and minimum temperatures in Bangor during September?
Enjoy moderate daytime temperatures of up to 16° 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?
Significant rainfall exceeding 125.1 mm is expected in Bangor during September, occurring over more than 19 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 29 km/h, suggesting breezy to windy conditions, depending on your activities.
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