Onondaga County (Syracuse)
September
Weather in Onondaga County, New York for September 2027
Your guide to Onondaga County weather in September - trends and predictions
In general, the average temperature in Onondaga County at the beginning of September is 23.1 °C. As the month progressed, temperatures tended to noticeably cool down, reaching an average of 20.2 °C by the end of September.
Onondaga County experiences moderate rainfall in September, with an average of 7 rainy days and a total precipitation of 335.6 mm.
Is September a good time to visit Onondaga County? check out the best time to travel to Onondaga County page.
✨ Is September a good time to visit Onondaga County? – Ask the AI Weatherman
Temperatures
Rain 🌧️
More
23
Dry days
7
Rainy days
0
Snow days
22°/12°
Temperatures
14 km/h
Avg max wind
76 %
Avg humidity
Onondaga County Weather September
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Temperatures trend during September in Onondaga County
See the weather trend as well as the moving average line
September weather in Onondaga County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Heavy rain | 26° /14° | 33.2 mm | 4 | |
| Sept. 2 | Heavy rain | 22° /13° | 169.1 mm | 4 | |
| Sept. 3 |  Patchy rain possible | 23° /13° | 1.5 mm | 4 | |
| Sept. 4 | Heavy rain | 24° /14° | 31.6 mm | 6 | |
| Sept. 5 |  Sunny | 23° /12° | 0 mm | 6 | |
| Sept. 6 |  Light rain | 23° /12° | 8.4 mm | 6 | |
| Sept. 7 | Light rain | 21° /10° | 7.4 mm | 5 | |
| Sept. 8 | Patchy rain possible | 20° /9° | 0.1 mm | 4 | |
| Sept. 9 |  Moderate or heavy rain with thunder | 21° /11° | 11 mm | 4 | |
| Sept. 10 |  Mist | 21° /13° | 0.1 mm | 5 | |
| Sept. 11 |  Overcast | 23° /11° | 0 mm | 5 | |
| Sept. 12 | Patchy rain possible | 25° /12° | 1.6 mm | 6 | |
| Sept. 13 | Light rain | 24° /15° | 9.1 mm | 4 | |
| Sept. 14 | Sunny | 22° /13° | 0.1 mm | 6 | |
| Sept. 15 | Patchy rain possible | 23° /13° | 0.7 mm | 5 | |
| Sept. 16 |  Partly cloudy | 24° /14° | 0 mm | 5 | |
| Sept. 17 | Patchy rain possible | 24° /15° | 1.2 mm | 4 | |
| Sept. 18 |  Cloudy | 24° /13° | 0 mm | 6 | |
| Sept. 19 | Overcast | 20° /10° | 0 mm | 3 | |
| Sept. 20 | Light rain | 20° /9° | 3.3 mm | 3 | |
| Sept. 21 | Cloudy | 20° /10° | 0 mm | 3 | |
| Sept. 22 | Overcast | 21° /11° | 0.2 mm | 4 | |
| Sept. 23 |  Moderate rain | 18° /13° | 16.8 mm | 5 | |
| Sept. 24 | Overcast | 20° /13° | 0 mm | 5 | |
| Sept. 25 | Heavy rain | 20° /12° | 29.6 mm | 5 | |
| Sept. 26 | Patchy rain possible | 21° /12° | 2.2 mm | 4 | |
| Sept. 27 | Fog | 19° /11° | 0.7 mm | 3 | |
| Sept. 28 | Patchy rain possible | 20° /15° | 1.1 mm | 4 | |
| Sept. 29 | Light rain | 20° /13° | 6.6 mm | 4 | |
| Sept. 30 | Mist | 22° /13° | 0 mm | 4 | |
| Next | |||||
Important Notice
Our weather forecast for Onondaga 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 Onondaga County forecast closer to your planned date for the most up-to-date weather information.
Change Month
Onondaga County in September - FAQ
What are the expected maximum and minimum temperatures in Onondaga County during September?
Enjoy moderate daytime temperatures of up to 22° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Onondaga County during September?
Significant rainfall exceeding 335.6 mm is expected in Onondaga 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 Onondaga County during September?
The average wind speed in Onondaga County during September is 14 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in Onondaga County
Explore the daily rainfall trends and prepare for Onondaga Countys September weather 💧
Typically, Onondaga County has 7 rainy days in September with a total of 335.6 mm of rainfall.
UV exposure in Onondaga County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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