Cumberland County (Portland)
September
Weather in Cumberland County, Maine for September 2026
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 20.6 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 19.1 °F by the end of September.
With an average of 5 rainy days, Cumberland County experiences minimal rainfall in September.
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Temperatures
Rain 🌧️
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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
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Temperatures trend during September in Cumberland County
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September weather in Cumberland County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Light rain shower | 23° /17° | 2.9 mm | 6 | |
| Sept. 2 |  Partly cloudy | 20° /13° | 0 mm | 5 | |
| Sept. 3 |  Sunny | 19° /11° | 0 mm | 5 | |
| Sept. 4 | Sunny | 21° /13° | 0 mm | 5 | |
| Sept. 5 | Sunny | 21° /15° | 1.7 mm | 5 | |
| Sept. 6 |  Mist | 21° /15° | 0 mm | 5 | |
| Sept. 7 | Mist | 19° /12° | 13.9 mm | 5 | |
| Sept. 8 | Sunny | 20° /11° | 0.2 mm | 6 | |
| Sept. 9 | Sunny | 20° /11° | 0 mm | 6 | |
| Sept. 10 | Partly cloudy | 20° /12° | 0 mm | 5 | |
| Sept. 11 | Sunny | 22° /10° | 0 mm | 6 | |
| Sept. 12 | Partly cloudy | 21° /12° | 0 mm | 6 | |
| Sept. 13 | Patchy rain possible | 21° /13° | 0 mm | 5 | |
| Sept. 14 | Patchy rain possible | 20° /14° | 0 mm | 5 | |
| Sept. 15 | Partly cloudy | 21° /14° | 0 mm | 5 | |
| Sept. 16 | Sunny | 21° /13° | 0 mm | 6 | |
| Sept. 17 | Fog | 19° /12° | 0 mm | 5 | |
| Sept. 18 | Mist | 22° /13° | 0 mm | 5 | |
| Sept. 19 | Mist | 19° /13° | 0 mm | 5 | |
| Sept. 20 |  Moderate rain at times | 18° /12° | 2 mm | 5 | |
| Sept. 21 |  Overcast | 17° /12° | 3.3 mm | 4 | |
| Sept. 22 | Overcast | 17° /13° | 0 mm | 4 | |
| Sept. 23 | Overcast | 18° /14° | 0 mm | 5 | |
| Sept. 24 |  Cloudy | 18° /13° | 0 mm | 4 | |
| Sept. 25 | Mist | 17° /12° | 32.6 mm | 4 | |
| Sept. 26 |  Heavy rain | 20° /15° | 101.9 mm | 5 | |
| Sept. 27 | Fog | 20° /13° | 0 mm | 5 | |
| Sept. 28 | Cloudy | 19° /15° | 0 mm | 5 | |
| Sept. 29 | Mist | 20° /14° | 0 mm | 5 | |
| Sept. 30 | Cloudy | 20° /14° | 0 mm | 5 | |
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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.
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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 ☀️
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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.
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