Hancock County (Bar Harbor)
September
Weather in Hancock County, Maine for September 2025
Your guide to Hancock County weather in September - trends and predictions
Until now, September 2025 in Hancock County is slightly cooler than the historical average by -0.8 °F.
Expect cooler weather in the next days in Hancock County with the forecast suggesting a temperature of 19.3 °F, lower than the historical average.
In general, the average temperature in Hancock County at the beginning of September is 19.9 °F. As the month progressed, temperatures tended to slightly decrease, reaching an average of 19.7 °F by the end of September.
With an average of 4 rainy days, Hancock County experiences minimal rainfall in September.
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Temperatures
Rain 🌧️
More
26
Dry days
4
Rainy days
0
Snow days
20°/12°
Temperatures
15 km/h
Avg max wind
76 %
Avg humidity
Hancock County Weather September
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Temperatures trend during September in Hancock County
See the weather trend as well as the moving average line
September weather in Hancock County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Moderate rain at times | 23° /15° | 4.2 mm | 6 | |
| Sept. 2 |  Partly cloudy | 20° /12° | 0.1 mm | 5 | |
| Sept. 3 |  Sunny | 19° /10° | 0 mm | 5 | |
| Sept. 4 |  Cloudy | 19° /11° | 0 mm | 4 | |
| Sept. 5 | Sunny | 20° /13° | 0 mm | 5 | |
| Sept. 6 | Partly cloudy | 19° /14° | 0 mm | 5 | |
| Sept. 7 |  Patchy rain possible | 19° /12° | 16.8 mm | 5 | |
| Sept. 8 |  Overcast | 20° /11° | 1 mm | 5 | |
| Sept. 9 | Sunny | 20° /11° | 0 mm | 6 | |
| Sept. 10 | Cloudy | 20° /11° | 0 mm | 5 | |
| Sept. 11 | Sunny | 23° /7° | 0 mm | 6 | |
| Sept. 12 | Partly cloudy | 22° /11° | 0 mm | 6 | |
| Sept. 13 | Patchy rain possible | 22° /11° | 0.1 mm | 5 | |
| Sept. 14 | Partly cloudy | 22° /12° | 0 mm | 6 | |
| Sept. 15 | Partly cloudy | 21° /9° | 0 mm | 1.3 | |
| Sept. 16 | Partly cloudy | 17° /7° | 0 mm | 1.3 | |
| Sept. 17 |  Mist | 17° /10° | 0 mm | 1.3 | |
| Sept. 18 | Cloudy | 21° /11° | 0 mm | 1.2 | |
| Sept. 19 | Sunny | 20° /11° | 0 mm | 0.1 | |
| Sept. 20 | Sunny | 16° /7° | 0 mm | 4 | |
| Sept. 21 | Sunny | 17° /6° | 0 mm | 4 | |
| Sept. 22 | Sunny | 22° /10° | 0 mm | 5 | |
| Sept. 23 | Sunny | 20° /12° | 0 mm | 5 | |
| Sept. 24 |  Moderate rain | 18° /13° | 8.7 mm | 3 | |
| Sept. 25 | Patchy rain possible | 15° /13° | 3.4 mm | 3 | |
| Sept. 26 | Sunny | 20° /12° | 0 mm | 4 | |
| Sept. 27 | Sunny | 25° /13° | 0 mm | 5 | |
| Sept. 28 | Sunny | 21° /12° | 0 mm | 5 | |
| Sept. 29 | Overcast | 18° /11° | 0 mm | 4 | |
| Sept. 30 | Cloudy | 21° /13° | 0 mm | 5 | |
| Next | |||||
Important Notice
Our weather forecast for Hancock 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 Hancock County forecast closer to your planned date for the most up-to-date weather information.
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Hancock County in September - FAQ
What are the expected maximum and minimum temperatures in Hancock County during September?
Enjoy moderate daytime temperatures of up to 20° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Hancock County during September?
Moderate rainfall is anticipated in Hancock County during September, with a total of 62 mm spread over approximately 4 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Hancock County during September?
The average wind speed in Hancock County during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Hancock County
Explore the daily rainfall trends and prepare for Hancock Countys September weather 💧
UV exposure in Hancock County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is Hancock County?Get accurate weather forecasts for Hancock County, located at latitude 44.388 and longitude -68.204. Stay updated with localized weather information tailored for Hancock County.
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