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September Weather in Killingly Center, United States

Last updated: June 24, 2025

In September, the average temperature in Killingly Center, United States hovers around 19°C (66°F), creating a pleasant atmosphere. Temperatures can range from a cool 4°C (40°F) to a warm 34°C (94°F), offering a variety of experiences. Expect 93 mm (3.7 in) of precipitation spread over 9 days, contributing to an average humidity of 75% that adds a touch of freshness to the air.

September Temperature in Killingly Center

In September in Killingly Center, the average temperature is 19°C (66°F). Maximums can reach 34°C (94°F) and minimums can be as low as 4°C (40°F). Travelers should be prepared for a wide range of temperatures and pack accordingly for both warm days and cooler evenings.

September Weather in Killingly Center: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Killingly Center, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Killingly Center, September typically has an average temperature of 19°C (66°F), with highs reaching up to 34°C (94°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec313439485968747366564335
Data source: Temperature data for Killingly Center 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 Killingly Center

In Killingly Center in September, the precipitation amount is 93 mm (3.7 in) over the course of 9 days.

September Precipitation Trends in Killingly Center

The chart displays monthly precipitation patterns in Killingly Center, 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 Killingly Center, September typically receives around 93 mm (3.7 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec718997130107991451129313398124
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Killingly Center

In Killingly Center in September humidity is 75%. With an average temperature of 19°C (66°F), this humidity feels like a warm, enveloping blanket, making it slightly uncomfortable for traveling as you navigate through the thick, muggy air.

September Average Humidity in Killingly Center

This chart illustrates the average monthly humidity levels in Killingly Center, 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 Killingly Center is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%84%82%79%75%78%76%76%76%75%80%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Killingly Center

In Killingly Center in September, the maximum UV index is 8, which corresponds to a very high Exposure Category. This means that the time to burn is only 15 minutes. For more detailed information, you can refer to the Hourly UV Index in Killingly Center.

Maximum UV Index Levels in Killingly Center for September

The chart shows the monthly maximum UV Index (UVI) for Killingly Center 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 Killingly Center typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3568910998642
Data source: Killingly Center 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 Killingly Center Compares to Other Months

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

This table compares monthly weather conditions in Killingly Center, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather0°C (31°F)71 mm (2.8 inches)84%moderate
February Weather1°C (34°F)89 mm (3.5 inches)84%moderate
March Weather4°C (39°F)96 mm (3.8 inches)82%high
April Weather9°C (49°F)130 mm (5.1 inches)79%very high
May Weather15°C (59°F)107 mm (4.2 inches)75%very high
June Weather20°C (69°F)99 mm (3.9 inches)78%very high
July Weather23°C (74°F)145 mm (5.7 inches)76%very high
August Weather23°C (73°F)112 mm (4.4 inches)76%very high
September Weather19°C (66°F)93 mm (3.7 inches)75%very high
October Weather13°C (56°F)133 mm (5.2 inches)75%high
November Weather6°C (43°F)98 mm (3.9 inches)80%moderate
December Weather1°C (35°F)124 mm (4.9 inches)80%low

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