Weather in Watertown, New York for September 2025
Until now, September 2025 in Watertown has been nearly identical to the historical average, with a temperature of 22 °F (showing only a slight deviation of 0.4 °F).
The forecast for the upcoming days in Watertown predicts a temperature of 24 °F, which is slightly above the historical average.
In general, the average temperature in Watertown at the beginning of September is 22 °F. As the month progressed, temperatures tended to moderately fall, reaching an average of 21.4 °F by the end of September.
Watertown experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 133.1 mm.
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Watertown Weather September
Temperatures trend during September in Watertown
September weather in Watertown day by day
| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Light rain shower | 24° /12° | 1 mm | 6 | |
| Sept. 2 |  Cloudy | 20° /12° | 0 mm | 5 | |
| Sept. 3 |  Sunny | 22° /11° | 0 mm | 6 | |
| Sept. 4 | Sunny | 24° /12° | 51.7 mm | 6 | |
| Sept. 5 | Sunny | 24° /12° | 0 mm | 6 | |
| Sept. 6 |  Overcast | 22° /13° | 25.5 mm | 5 | |
| Sept. 7 | Light rain shower | 18° /8° | 7.6 mm | 4 | |
| Sept. 8 |  Light drizzle | 17° /7° | 0.3 mm | 5 | |
| Sept. 9 | Light rain shower | 20° /9° | 1.6 mm | 5 | |
| Sept. 10 |  Partly cloudy | 20° /8° | 0 mm | 6 | |
| Sept. 11 | Overcast | 23° /11° | 0 mm | 6 | |
| Sept. 12 | Partly cloudy | 24° /12° | 0 mm | 6 | |
| Sept. 13 | Sunny | 23° /13° | 0 mm | 6 | |
| Sept. 14 |  Mist | 24° /13° | 0 mm | 6 | |
| Sept. 15 | Partly cloudy | 25° /7° | 0 mm | 1.4 | |
| Sept. 16 | Partly cloudy | 25° /12° | 0 mm | 1.3 | |
| Sept. 17 | Cloudy | 24° /16° | 0 mm | 1.3 | |
| Sept. 18 | Sunny | 26° /12° | 0 mm | 1.3 | |
| Sept. 19 | Partly cloudy | 21° /9° | 0.1 mm | 0 | |
| Sept. 20 | Sunny | 22° /3° | 0 mm | 4 | |
| Sept. 21 | Sunny | 27° /14° | 0 mm | 5 | |
| Sept. 22 | Sunny | 26° /17° | 0 mm | 6 | |
| Sept. 23 | Sunny | 28° /18° | 0 mm | 6 | |
| Sept. 24 | Patchy rain possible | 27° /17° | 1.2 mm | 5 | |
| Sept. 25 |  Moderate rain | 21° /13° | 5.7 mm | 4 | |
| Sept. 26 | Patchy rain possible | 20° /16° | 3.2 mm | 4 | |
| Sept. 27 | Patchy rain possible | 21° /15° | 3.7 mm | 4 | |
| Sept. 28 | Sunny | 23° /12° | 0 mm | 5 | |
| Sept. 29 | Overcast | 18° /16° | 0 mm | 4 | |
| Sept. 30 | Mist | 20° /13° | 0 mm | 5 | |
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Watertown in September - FAQ
September rainfall patterns in Watertown
UV exposure in Watertown during September
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Where is Watertown?Get accurate weather forecasts for Watertown, located at latitude 43.975 and longitude -75.911. Stay updated with localized weather information tailored for Watertown.