Penobscot County (Bangor)
September
Weather in Penobscot County, Maine for September 2027
Your guide to Penobscot County weather in September - trends and predictions
In general, the average temperature in Penobscot County at the beginning of September is 21.7 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 19.1 °C by the end of September.
Penobscot County experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 189 mm.
Is September a good time to visit Penobscot County? check out the best time to travel to Penobscot County page.
✨ Is September a good time to visit Penobscot County? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
24
Dry days
6
Rainy days
0
Snow days
21°/11°
Temperatures
14 km/h
Avg max wind
73 %
Avg humidity
Penobscot County Weather September
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Temperatures trend during September in Penobscot County
See the weather trend as well as the moving average line
September weather in Penobscot County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Light rain | 25° /12° | 2.5 mm | 6 | |
| Sept. 2 |  Overcast | 22° /12° | 0 mm | 5 | |
| Sept. 3 |  Heavy rain | 20° /11° | 53.4 mm | 4 | |
| Sept. 4 | Light rain | 21° /12° | 6.4 mm | 4 | |
| Sept. 5 |  Sunny | 21° /13° | 0.1 mm | 5 | |
| Sept. 6 |  Patchy rain possible | 21° /12° | 0.1 mm | 5 | |
| Sept. 7 | Light rain | 21° /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 | Light rain | 23° /11° | 6 mm | 5 | |
| Sept. 11 | Partly cloudy | 23° /9° | 0 mm | 5 | |
| Sept. 12 | Sunny | 23° /9° | 0 mm | 6 | |
| Sept. 13 | Light rain | 21° /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 | 5.9 | |
| Sept. 17 | Patchy rain possible | 24° /12° | 1.6 mm | 4 | |
| Sept. 18 | Patchy rain possible | 23° /12° | 1.6 mm | 5 | |
| Sept. 19 | Overcast | 20° /10° | 0 mm | 5 | |
| Sept. 20 | Overcast | 17° /8° | 0.5 mm | 3 | |
| Sept. 21 |  Cloudy | 19° /8° | 0 mm | 4 | |
| Sept. 22 | Cloudy | 18° /9° | 0 mm | 4 | |
| Sept. 23 | Light rain | 19° /9° | 6.2 mm | 4 | |
| Sept. 24 | Overcast | 19° /9° | 0 mm | 4 | |
| Sept. 25 | Heavy rain | 19° /10° | 27.3 mm | 3 | |
| Sept. 26 | Heavy rain | 20° /13° | 45.7 mm | 3 | |
| Sept. 27 | Light rain | 19° /11° | 3.6 mm | 4 | |
| Sept. 28 |  Moderate rain | 18° /11° | 16 mm | 3 | |
| Sept. 29 | Light rain | 19° /12° | 4.7 mm | 4 | |
| Sept. 30 | Cloudy | 20° /12° | 0 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for Penobscot County 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 Penobscot County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Penobscot County in September - FAQ
What are the expected maximum and minimum temperatures in Penobscot County 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 Penobscot County during September?
Significant rainfall exceeding 189 mm is expected in Penobscot County during September, occurring over more than 6 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Penobscot County during September?
The average wind speed in Penobscot County during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Penobscot County
Explore the daily rainfall trends and prepare for Penobscot Countys September weather 💧
Typically, Penobscot County has 6 rainy days in September with a total of 189 mm of rainfall.
UV exposure in Penobscot County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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