Jefferson County (Watertown)
September
Weather in Jefferson County, New York for September 2027
Your guide to Jefferson County weather in September - trends and predictions
In general, the average temperature in Jefferson County at the beginning of September is 22.7 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 19.6 °C by the end of September.
Jefferson County experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 176.1 mm.
Is September a good time to visit Jefferson County? check out the best time to travel to Jefferson County page.
✨ Is September a good time to visit Jefferson County? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
23
Dry days
7
Rainy days
0
Snow days
21°/12°
Temperatures
16 km/h
Avg max wind
76 %
Avg humidity
Jefferson County Weather September
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Temperatures trend during September in Jefferson County
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September weather in Jefferson County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Light rain | 24° /14° | 5.9 mm | 4 | |
| Sept. 2 | Light rain | 22° /14° | 4.3 mm | 4 | |
| Sept. 3 |  Patchy rain possible | 23° /14° | 2 mm | 6 | |
| Sept. 4 |  Heavy rain | 24° /13° | 34.5 mm | 6 | |
| Sept. 5 | Light rain | 24° /13° | 2.6 mm | 5 | |
| Sept. 6 |  Moderate rain | 22° /13° | 17 mm | 5 | |
| Sept. 7 | Light rain | 20° /9° | 5.1 mm | 5 | |
| Sept. 8 | Light drizzle | 19° /9° | 0.2 mm | 4 | |
| Sept. 9 | Light rain | 21° /11° | 4.8 mm | 4 | |
| Sept. 10 | Moderate rain | 21° /11° | 12.3 mm | 6 | |
| Sept. 11 |  Overcast | 22° /10° | 0 mm | 6 | |
| Sept. 12 | Patchy rain possible | 24° /11° | 1.5 mm | 6 | |
| Sept. 13 | Patchy rain possible | 23° /15° | 1.1 mm | 4 | |
| Sept. 14 |  Mist | 22° /12° | 0 mm | 6 | |
| Sept. 15 | Patchy rain possible | 23° /12° | 0.1 mm | 4 | |
| Sept. 16 | Patchy rain possible | 24° /14° | 0.1 mm | 4 | |
| Sept. 17 | Fog | 24° /16° | 0.2 mm | 4 | |
| Sept. 18 | Mist | 23° /13° | 0.6 mm | 5 | |
| Sept. 19 | Fog | 20° /9° | 0 mm | 4 | |
| Sept. 20 | Patchy rain possible | 20° /10° | 1.1 mm | 4 | |
| Sept. 21 |  Partly cloudy | 21° /10° | 0 mm | 4 | |
| Sept. 22 | Partly cloudy | 20° /10° | 0 mm | 5 | |
| Sept. 23 |  Moderate or heavy rain shower | 19° /12° | 5.5 mm | 4 | |
| Sept. 24 | Overcast | 21° /12° | 0 mm | 5 | |
| Sept. 25 | Heavy rain | 18° /11° | 52.6 mm | 4 | |
| Sept. 26 | Moderate rain | 20° /13° | 22.8 mm | 3 | |
| Sept. 27 | Patchy rain possible | 20° /12° | 1.7 mm | 4 | |
| Sept. 28 | Mist | 19° /12° | 0 mm | 4 | |
| Sept. 29 | Overcast | 19° /11° | 0 mm | 4 | |
| Sept. 30 | Mist | 21° /11° | 0 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for Jefferson 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 Jefferson County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Jefferson County in September - FAQ
What are the expected maximum and minimum temperatures in Jefferson County during September?
Enjoy moderate daytime temperatures of up to 21° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Jefferson County during September?
Significant rainfall exceeding 176.1 mm is expected in Jefferson County during September, occurring over more than 7 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Jefferson County during September?
The average wind speed in Jefferson County during September is 16 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Jefferson County
Explore the daily rainfall trends and prepare for Jefferson Countys September weather 💧
Typically, Jefferson County has 7 rainy days in September with a total of 176.1 mm of rainfall.
UV exposure in Jefferson County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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