Hancock County (Bar Harbor)
September
Weather in Hancock County, Maine for September 2025
Your guide to Hancock County weather in September - trends and predictions
In general, the average temperature in Hancock County at the beginning of September is 20.7 °F. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 17.7 °F by the end of September.
With an average of 5 rainy days, Hancock County experiences minimal rainfall in September.
New! Chat with our AI weatherman - it’s amazing and free.
Temperatures
Rain 🌧️
More
25
Dry days
5
Rainy days
0
Snow days
20°/12°
Temperatures
15 km/h
Avg max wind
76 %
Avg humidity
Hancock County Weather September
Move between months or click on a day
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
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Moderate rain at times | 20° /16° | 8.4 mm | 5 | |
| Sept. 2 |  Partly cloudy | 20° /12° | 0.1 mm | 6 | |
| Sept. 3 |  Sunny | 19° /9° | 0 mm | 5 | |
| Sept. 4 |  Cloudy | 23° /11° | 0 mm | 5 | |
| Sept. 5 | Sunny | 23° /13° | 0 mm | 6 | |
| Sept. 6 | Partly cloudy | 19° /11° | 0 mm | 5 | |
| Sept. 7 |  Patchy rain possible | 21° /12° | 0.1 mm | 5 | |
| Sept. 8 |  Overcast | 18° /11° | 0 mm | 4 | |
| Sept. 9 | Sunny | 18° /10° | 0 mm | 5 | |
| Sept. 10 | Cloudy | 19° /11° | 0 mm | 4 | |
| Sept. 11 | Sunny | 21° /8° | 0 mm | 6 | |
| Sept. 12 | Partly cloudy | 23° /12° | 0 mm | 6 | |
| Sept. 13 | Patchy rain possible | 24° /12° | 0.2 mm | 5 | |
| Sept. 14 | Partly cloudy | 23° /12° | 0 mm | 6 | |
| Sept. 15 | Sunny | 23° /11° | 0 mm | 6 | |
| Sept. 16 | Sunny | 22° /12° | 0 mm | 6 | |
| Sept. 17 | Overcast | 25° /12° | 0 mm | 6 | |
| Sept. 18 | Overcast | 25° /13° | 0 mm | 6 | |
| Sept. 19 | Overcast | 23° /13° | 0 mm | 5 | |
| Sept. 20 | Overcast | 18° /14° | 0 mm | 4 | |
| Sept. 21 | Cloudy | 18° /14° | 0 mm | 4 | |
| Sept. 22 | Cloudy | 17° /13° | 0 mm | 4 | |
| Sept. 23 | Patchy rain possible | 17° /12° | 1 mm | 4 | |
| Sept. 24 | Cloudy | 17° /11° | 0 mm | 4 | |
| Sept. 25 | Patchy rain possible | 16° /11° | 0.3 mm | 4 | |
| Sept. 26 | Moderate or heavy rain shower | 13° /10° | 39 mm | 3 | |
| Sept. 27 | Patchy rain possible | 20° /13° | 12.6 mm | 5 | |
| Sept. 28 | Patchy rain possible | 19° /13° | 0.2 mm | 4 | |
| 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.
Change Month
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 61.9 mm spread over approximately 5 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 ☀️
Top locations in Hancock County
Select a location for an accurate weather forecast
More Locations Quick links
More Hancock County weather pages
You are here
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.
Found a mistake?
We appreciate your attention to details. Tell us here.