New London County (New London)
September
Weather in New London County, Connecticut for September 2026
Your guide to New London County weather in September - trends and predictions
So far, September 2026 in New London County is slightly warmer than the historical average by 1.6 °F.
The forecast for the next days in New London County predicts temperatures to be around 20 °F, close to the historical average.
In general, the average temperature in New London County at the beginning of September is 23.9 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of 20 °F by the end of September.
New London County experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 162.4 mm.
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Temperatures
Rain 🌧️
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24
Dry days
6
Rainy days
0
Snow days
21°/16°
Temperatures
17 km/h
Avg max wind
80 %
Avg humidity
New London County Weather September
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Temperatures trend during September in New London County
See the weather trend as well as the moving average line
September weather in New London County day by day
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| Date | Weather | Temperatures | Rain | UV | More |
|---|---|---|---|---|---|
| Sept. 1 |  Mist | 23° /16° | 57.8 mm | 4 | |
| Sept. 2 |  Cloudy | 24° /16° | 0.2 mm | 5 | |
| Sept. 3 | Fog | 25° /15° | 4 mm | 2 | |
| Sept. 4 | Mist | 25° /16° | 11.6 mm | 2 | |
| Sept. 5 |  Moderate rain | 25° /17° | 14.1 mm | 5 | |
| Sept. 6 |  Overcast | 21° /17° | 13 mm | 2 | |
| Sept. 7 |  Moderate or heavy rain shower | 24° /13° | 6.9 mm | 5 | |
| Sept. 8 |  Sunny | 27° /13° | 0 mm | 7 | |
| Sept. 9 | Cloudy | 23° /14° | 0.3 mm | 5 | |
| Sept. 10 | Overcast | 25° /18° | 0.2 mm | 2 | |
| Sept. 11 | Sunny | 26° /15° | 0 mm | 7 | |
| Sept. 12 | Cloudy | 22° /14° | 0 mm | 6 | |
| Sept. 13 |  Partly cloudy | 22° /18° | 28.6 mm | 5 | |
| Sept. 14 | Mist | 23° /16° | 0 mm | 4 | |
| Sept. 15 | Fog | 19° /13° | 0 mm | 4 | |
| Sept. 16 | Fog | 20° /15° | 0 mm | 5 | |
| Sept. 17 | Fog | 18° /13° | 0 mm | 2 | |
| Sept. 18 | Sunny | 26° /20° | 1.4 mm | 6.1 | |
| Sept. 19 | Overcast | 19° /13° | 0 mm | 6.2 | |
| Sept. 20 | Overcast | 21° /15° | 13.8 mm | 0.6 | |
| Sept. 21 | Overcast | 19° /11° | 0 mm | 4 | |
| Sept. 22 |  Light rain shower | 16° /14° | 4.5 mm | 4 | |
| Sept. 23 | Light rain shower | 19° /15° | 12.9 mm | 4 | |
| Sept. 24 | Patchy rain possible | 21° /19° | 2.2 mm | 5 | |
| Sept. 25 | Sunny | 20° /13° | 20.9 mm | 5 | |
| Sept. 26 | Sunny | 17° /10° | 0 mm | 5 | |
| Sept. 27 | Sunny | 20° /11° | 0 mm | 5 | |
| Sept. 28 | Sunny | 20° /17° | 0 mm | 6 | |
| Sept. 29 | Sunny | 21° /18° | 0 mm | 6 | |
| Sept. 30 | Sunny | 21° /17° | 0 mm | 6 | |
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Important Notice
Our weather forecast for New London 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 New London County forecast closer to your planned date for the most up-to-date weather information.
Change Month
New London County in September - FAQ
What are the expected maximum and minimum temperatures in New London County during September?
During September, expect a variety of temperatures with highs around 21° and lows near 16°, suitable for diverse activities and preferences.
How much rainfall should be expected in New London County during September?
Significant rainfall exceeding 162.4 mm is expected in New London County during September, occurring over more than 6 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in New London County during September?
The average wind speed in New London County during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.
September rainfall patterns in New London County
Explore the daily rainfall trends and prepare for New London Countys September weather 💧
Typically, New London County has 6 rainy days in September with a total of 162.4 mm of rainfall.
UV exposure in New London County during September
Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
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Where is New London County?Get accurate weather forecasts for New London County, located at latitude 41.356 and longitude -72.1. Stay updated with localized weather information tailored for New London County.
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