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September Weather in New London, United States

Last updated: June 24, 2025

In September, the average temperature in New London, United States hovers around 22°C (72°F). However, be prepared for a range as it can dip to a cool 7°C (46°F) or soar to a warm 35°C (95°F). Expect 73 mm (2.9 in) of precipitation over 6 days, contributing to an average humidity level of 76%.

September Temperature in New London

In September in New London, the average temperature is 22°C (72°F). Maximums can reach 35°C (95°F), while minimums can dip as low as 7°C (46°F). This variability makes it essential to pack both light clothing for the warm days and layers for cooler evenings when traveling.

September Weather in New London: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in New London, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In New London, September typically has an average temperature of 22°C (72°F), with highs reaching up to 35°C (95°F) and lows dropping to around 7°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec303345546676797672584337
Data source: Temperature data for New London generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in New London

In New London in September, the precipitation amount is 73 mm (2.9 in) over a span of 6 days.

September Precipitation Trends in New London

The chart displays monthly precipitation patterns in New London, with values for each month alongside September’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how September’s conditions compare to those of other months. In New London, September typically receives around 73 mm (2.9 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec666112210516411392109731025841
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in New London

In New London in September humidity is 76%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, making travel slightly uncomfortable as you navigate through the thick, saturated air.

September Average Humidity in New London

This chart illustrates the average monthly humidity levels in New London, with September’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In September, average humidity in New London is approximately 76%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%80%80%80%82%83%81%80%76%76%85%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in New London

In New London in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in New London.

Maximum UV Index Levels in New London for September

The chart shows the monthly maximum UV Index (UVI) for New London in September, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In September, the maximum UV index in New London typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101110109643
Data source: New London September UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How September Weather in New London Compares to Other Months

Weather in New London varies notably across the year, with each month offering distinct climate conditions. This page compares September’s weather to other months in New London, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in New London, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)66 mm (2.6 inches)82%moderate
February Weather0°C (33°F)61 mm (2.4 inches)80%moderate
March Weather7°C (46°F)122 mm (4.8 inches)80%high
April Weather12°C (54°F)105 mm (4.1 inches)80%very high
May Weather19°C (67°F)164 mm (6.5 inches)82%very high
June Weather25°C (77°F)113 mm (4.5 inches)83%extreme
July Weather26°C (80°F)92 mm (3.6 inches)81%very high
August Weather24°C (76°F)109 mm (4.3 inches)80%very high
September Weather22°C (72°F)73 mm (2.9 inches)76%very high
October Weather14°C (58°F)102 mm (4.0 inches)76%high
November Weather6°C (44°F)58 mm (2.3 inches)85%moderate
December Weather3°C (38°F)41 mm (1.6 inches)86%moderate

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