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United States weather

Weather in New London, Connecticut for September 2026

Your guide to New London weather in September - trends and predictions

    Temperatures

  • So far, September 2026 in New London is slightly warmer than the historical average by 1.6 °F.

  • The forecast for the next days in New London predicts temperatures to be around 20 °F, close to the historical average.

  • In general, the average temperature in New London 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.

    • Rain 🌧️

  • New London experiences moderate rainfall in September, with an average of 6 rainy days and a total precipitation of 162.4 mm.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
24
Dry days
Average rainy days
6
Rainy days
Average snowy days
0
Snow days
Average temperatures
21°/16°
Temperatures
Average wind speed
17 km/h
Avg max wind
Average humidity
80 %
Avg humidity

New London Weather September

Move between months or click on a day
August
October
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Mist
23°
2
Cloudy
24°
3
Fog
25°
4
Mist
25°
5
Moderate rain
25°
6
Overcast
21°
7
Moderate or heavy rain shower
24°
8
Sunny
27°
9
Cloudy
23°
10
Overcast
25°
11
Sunny
26°
12
Cloudy
22°
13
Partly cloudy
22°
14
Mist
23°
15
Fog
19°
16
Fog
20°
17
Fog
18°
18
Sunny
26°
19
Overcast
19°
20
Overcast
21°
21
Overcast
19°
22
Light rain shower
16°
23
Light rain shower
19°
24
Patchy rain possible
21°
25
Sunny
20°
26
Sunny
17°
27
Sunny
20°
28
Sunny
20°
29
Sunny
21°
30
Sunny
21°

Temperatures trend during September in New London

See the weather trend as well as the moving average line

September weather in New London day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
Sept. 1 Mist
Mist
 23° /16° 57.8 mm 4
Sept. 2 Cloudy
Cloudy
 24° /16° 0.2 mm 5
Sept. 3 Fog
Fog
 25° /15° 4 mm 2
Sept. 4 Mist
Mist
 25° /16° 11.6 mm 2
Sept. 5 Moderate rain
Moderate rain
 25° /17° 14.1 mm 5
Sept. 6 Overcast
Overcast
 21° /17° 13 mm 2
Sept. 7 Moderate or heavy rain shower
Moderate or heavy rain shower
 24° /13° 6.9 mm 5
Sept. 8 Sunny
Sunny
 27° /13° 0 mm 7
Sept. 9 Cloudy
Cloudy
 23° /14° 0.3 mm 5
Sept. 10 Overcast
Overcast
 25° /18° 0.2 mm 2
Sept. 11 Sunny
Sunny
 26° /15° 0 mm 7
Sept. 12 Cloudy
Cloudy
 22° /14° 0 mm 6
Sept. 13 Partly cloudy
Partly cloudy
 22° /18° 28.6 mm 5
Sept. 14 Mist
Mist
 23° /16° 0 mm 4
Sept. 15 Fog
Fog
 19° /13° 0 mm 4
Sept. 16 Fog
Fog
 20° /15° 0 mm 5
Sept. 17 Fog
Fog
 18° /13° 0 mm 2
Sept. 18 Sunny
Sunny
 26° /20° 1.4 mm 6.1
Sept. 19 Overcast
Overcast
 19° /13° 0 mm 6.2
Sept. 20 Overcast
Overcast
 21° /15° 13.8 mm 0.6
Sept. 21 Overcast
Overcast
 19° /11° 0 mm 4
Sept. 22 Light rain shower
Light rain shower
 16° /14° 4.5 mm 4
Sept. 23 Light rain shower
Light rain shower
 19° /15° 12.9 mm 4
Sept. 24 Patchy rain possible
Patchy rain possible
 21° /19° 2.2 mm 5
Sept. 25 Sunny
Sunny
 20° /13° 20.9 mm 5
Sept. 26 Sunny
Sunny
 17° /10° 0 mm 5
Sept. 27 Sunny
Sunny
 20° /11° 0 mm 5
Sept. 28 Sunny
Sunny
 20° /17° 0 mm 6
Sept. 29 Sunny
Sunny
 21° /18° 0 mm 6
Sept. 30 Sunny
Sunny
 21° /17° 0 mm 6
Next
Important Notice
Our weather forecast for New London 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 forecast closer to your planned date for the most up-to-date weather information.
Change Month
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New London in September - FAQ

What are the expected maximum and minimum temperatures in New London 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 during September?
Significant rainfall exceeding 162.4 mm is expected in New London 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 during September?
The average wind speed in New London during September is 17 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in New London

Explore the daily rainfall trends and prepare for New Londons September weather 💧
Typically, New London has 6 rainy days in September with a total of 162.4 mm of rainfall.

UV exposure in New London during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

Quick links

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Location coordinates Where is New London?

Get accurate weather forecasts for New London, located at latitude 41.356 and longitude -72.1. Stay updated with localized weather information tailored for New London.

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