Weather in Duluth, Minnesota for September 2025
Until now, September 2025 in Duluth is cooler than usual, with temperatures averaging 17.6 °F, this is -2.6 °F below the typical seasonal average.
The forecast for the next days in Duluth predicts temperatures to be around 21 °F, close to the historical average.
In general, the average temperature in Duluth at the beginning of September is 20 °F. As the month progressed, temperatures tended to slightly increase, reaching an average of 20.1 °F by the end of September.
Duluth experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 36.2 mm.
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Duluth Weather September
Temperatures trend during September in Duluth
September weather in Duluth day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Sunny | 25° /14° | 1.5 mm | 7 | |
| Sept. 2 | Sunny | 23° /13° | 11.4 mm | 6 | |
| Sept. 3 |  Overcast | 21° /10° | 2.8 mm | 5 | |
| Sept. 4 |  Partly cloudy | 21° /10° | 3 mm | 6 | |
| Sept. 5 |  Heavy rain at times | 16° /10° | 17.1 mm | 4 | |
| Sept. 6 |  Moderate or heavy rain shower | 16° /7° | 1 mm | 5 | |
| Sept. 7 | Sunny | 18° /5° | 0 mm | 5 | |
| Sept. 8 | Partly cloudy | 23° /9° | 6.3 mm | 6 | |
| Sept. 9 | Partly cloudy | 22° /14° | 3.2 mm | 6 | |
| Sept. 10 |  Patchy rain possible | 20° /13° | 0.1 mm | 5 | |
| Sept. 11 | Partly cloudy | 21° /13° | 0 mm | 5 | |
| Sept. 12 | Sunny | 18° /13° | 15.4 mm | 5 | |
| Sept. 13 | Sunny | 20° /14° | 0 mm | 5 | |
| Sept. 14 | Patchy rain possible | 19° /13° | 0.3 mm | 5 | |
| Sept. 15 | Patchy rain possible | 25° /14° | 0.1 mm | 6 | |
| Sept. 16 |  Cloudy | 33° /15° | 0 mm | 1.1 | |
| Sept. 17 | Patchy rain possible | 27° /15° | 4 mm | 1.2 | |
| Sept. 18 | Overcast | 16° /12° | 0 mm | 1.1 | |
| Sept. 19 |  Heavy rain | 17° /11° | 24.9 mm | 1.1 | |
| Sept. 20 |  Moderate rain | 19° /13° | 17.5 mm | 0 | |
| Sept. 21 | Patchy rain possible | 17° /14° | 1 mm | 4 | |
| Sept. 22 | Cloudy | 23° /13° | 0 mm | 4 | |
| Sept. 23 | Sunny | 23° /11° | 0 mm | 5 | |
| Sept. 24 | Sunny | 24° /11° | 0 mm | 5 | |
| Sept. 25 | Patchy rain possible | 19° /13° | 1.6 mm | 4 | |
| Sept. 26 | Patchy rain possible | 23° /13° | 1 mm | 4 | |
| Sept. 27 | Partly cloudy | 10° /7° | 0 mm | 3 | |
| Sept. 28 | Patchy rain possible | 20° /8° | 0.5 mm | 3 | |
| Sept. 29 | Patchy rain possible | 22° /14° | 4.4 mm | 4 | |
| Sept. 30 |  Mist | 23° /9° | 0 mm | 5 | |
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Duluth in September - FAQ
September rainfall patterns in Duluth
UV exposure in Duluth during September
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Where is Duluth?Get accurate weather forecasts for Duluth, located at latitude 46.783 and longitude -92.107. Stay updated with localized weather information tailored for Duluth.