Cumberland County (Portland)
September
Weather in Cumberland County for September 2025
Your guide to Cumberland County weather in September - trends and predictions
In general, the average temperature in Cumberland County at the beginning of September is 22.1 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17 °F by the end of September.
With an average of 5 rainy days, Cumberland 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°/13°
Temperatures
15 km/h
Avg max wind
74 %
Avg humidity
Cumberland County Weather September
Move between months or click on a day
| Sun. | Mon. | Tue. | Wed. | Thu. | Fri. | Sat. |
|---|---|---|---|---|---|---|
| 1  24° | 2  22° | 3  21° | 4 24° | 5 23° | 6  20° | |
| 7 21° | 8 19° | 9 21° | 10 21° | 11 22° | 12 23° | 13 25° |
| 14 22° | 15 23° | 16 25° | 17 23° | 18 22° | 19 16° | 20  17° |
| 21  18° | 22 16° | 23 15° | 24  17° | 25 15° | 26  15° | 27 19° |
| 28 17° | 29 17° | 30 19° |
You can click on date
Access Cumberland County weather forecasts with a simple click. Select any date for comprehensive insights on temperature, rainfall, and wind conditions.
Temperatures trend during September in Cumberland County
See the weather trend as well as the moving average line
September weather day by day
Click on a date for more information
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 | Light rain shower | 24° /18° | 5.7 mm | 5 | |
| Sept. 2 | Partly cloudy | 22° /12° | 0 mm | 6 | |
| Sept. 3 | Sunny | 21° /9° | 0 mm | 6 | |
| Sept. 4 | Sunny | 24° /12° | 0 mm | 6 | |
| Sept. 5 | Sunny | 23° /14° | 0 mm | 6 | |
| Sept. 6 | Mist | 20° /12° | 0 mm | 5 | |
| Sept. 7 | Mist | 21° /12° | 1.5 mm | 5 | |
| Sept. 8 | Sunny | 19° /12° | 0.4 mm | 5 | |
| Sept. 9 | Sunny | 21° /10° | 0 mm | 6 | |
| Sept. 10 | Partly cloudy | 21° /11° | 0 mm | 6 | |
| Sept. 11 | Sunny | 22° /10° | 0 mm | 6 | |
| Sept. 12 | Partly cloudy | 23° /12° | 0 mm | 6 | |
| Sept. 13 | Patchy rain possible | 25° /14° | 0 mm | 6 | |
| Sept. 14 | Patchy rain possible | 22° /15° | 0.1 mm | 5 | |
| Sept. 15 | Partly cloudy | 23° /14° | 0 mm | 6 | |
| Sept. 16 | Sunny | 25° /14° | 0 mm | 7 | |
| Sept. 17 | Fog | 23° /13° | 0 mm | 5 | |
| Sept. 18 | Mist | 22° /14° | 0 mm | 5 | |
| Sept. 19 | Mist | 16° /13° | 0 mm | 4 | |
| Sept. 20 | Moderate rain at times | 17° /14° | 4.1 mm | 4 | |
| Sept. 21 | Overcast | 18° /14° | 6.6 mm | 4 | |
| Sept. 22 | Overcast | 16° /12° | 0 mm | 4 | |
| Sept. 23 | Overcast | 15° /13° | 0 mm | 4 | |
| Sept. 24 | Cloudy | 17° /12° | 0 mm | 4 | |
| Sept. 25 | Mist | 15° /10° | 0 mm | 4 | |
| Sept. 26 | Heavy rain | 15° /14° | 151.5 mm | 4 | |
| Sept. 27 | Fog | 19° /12° | 0 mm | 4 | |
| Sept. 28 | Cloudy | 17° /14° | 0 mm | 4 | |
| Sept. 29 | Mist | 17° /13° | 0 mm | 4 | |
| Sept. 30 | Cloudy | 19° /14° | 0 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for Cumberland 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 Cumberland County forecast closer to your planned date for the most up-to-date weather information.
Cumberland County in September - FAQ
What are the expected maximum and minimum temperatures in Cumberland County during September?
Enjoy moderate daytime temperatures of up to 20° and cooler nights around 13°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Cumberland County during September?
Significant rainfall exceeding 169.9 mm is expected in Cumberland County during September, occurring over more than 5 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Cumberland County during September?
The average wind speed in Cumberland County during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Cumberland County
Explore the daily rainfall trends and prepare for Cumberland Countys September weather 💧
UV exposure in Cumberland County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Top locations in Cumberland County
Select a location for an accurate weather forecast
More Locations Quick links
More Cumberland County weather pages
You are here
Where is Cumberland County?Get accurate weather forecasts for Cumberland County, located at latitude 43.657 and longitude -70.259. Stay updated with localized weather information tailored for Cumberland County.
Found a mistake?
We appreciate your attention to details. Tell us here.