September
Weather in Maine for September 2025
Your guide to Maine weather in September - trends and predictions
In general, the average temperature in Maine 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, Maine 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
Maine Weather September
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| 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° |
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Temperatures trend during September in Maine
See the weather trend as well as the moving average line
September weather day by day
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| 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 Maine 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 Maine forecast closer to your planned date for the most up-to-date weather information.
Maine in September - FAQ
What are the expected maximum and minimum temperatures in Maine 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 Maine during September?
Significant rainfall exceeding 169.9 mm is expected in Maine during September, occurring over more than 5 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Maine during September?
The average wind speed in Maine during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Maine
Explore the daily rainfall trends and prepare for Maines September weather 💧
UV exposure in Maine during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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