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September Weather in Ansonia, United States

Last updated: June 24, 2025

In September, the average temperature in Ansonia, United States hovers around 20°C (69°F). Expect a minimum chill of 4°C (40°F) and a warm peak of 33°C (92°F). With an average humidity of 78%, you'll feel the tropical air as you experience a total precipitation of 81 mm (3.2 in) across about 7 days. Plan accordingly to enjoy all that this vibrant locale has to offer!

September Temperature in Ansonia

In September in Ansonia, the average temperature is 20°C (69°F). Maximums can reach 33°C (92°F), while minimums can drop as low as 4°C (40°F). This varied climate makes Ansonia an ideal destination for travelers seeking both warmth and cooler experiences.

September Weather in Ansonia: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Ansonia, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ansonia, September typically has an average temperature of 20°C (69°F), with highs reaching up to 33°C (92°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec293241516372757368574135
Data source: Temperature data for Ansonia 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 Ansonia

In Ansonia in September, the precipitation amount is 81 mm (3.2 in) over a period of 7 days.

September Precipitation Trends in Ansonia

The chart displays monthly precipitation patterns in Ansonia, 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 Ansonia, September typically receives around 81 mm (3.2 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec749610710013812711010781998874
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Ansonia

In Ansonia in September, humidity is 78%. With an average temperature of 20°C (69°F), this humidity feels like a warm, enveloping blanket, making travel somewhat uncomfortable as sweat clings to your skin and the air feels thick and heavy, urging you to seek out shaded areas and refreshing drinks.

September Average Humidity in Ansonia

This chart illustrates the average monthly humidity levels in Ansonia, 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 Ansonia is approximately 78%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%87%88%81%82%81%78%78%82%89%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Ansonia

In Ansonia 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 Ansonia.

Maximum UV Index Levels in Ansonia for September

The chart shows the monthly maximum UV Index (UVI) for Ansonia 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 Ansonia typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec356910101098642
Data source: Ansonia 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 Ansonia Compares to Other Months

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

This table compares monthly weather conditions in Ansonia, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-1°C (30°F)74 mm (2.9 inches)88%moderate
February Weather0°C (33°F)96 mm (3.8 inches)87%moderate
March Weather5°C (42°F)107 mm (4.2 inches)87%high
April Weather11°C (51°F)99 mm (3.9 inches)87%very high
May Weather17°C (63°F)138 mm (5.4 inches)81%very high
June Weather22°C (72°F)127 mm (5.0 inches)82%very high
July Weather24°C (76°F)110 mm (4.3 inches)81%very high
August Weather23°C (73°F)107 mm (4.2 inches)78%very high
September Weather20°C (69°F)81 mm (3.2 inches)78%very high
October Weather14°C (57°F)99 mm (3.9 inches)82%high
November Weather5°C (41°F)88 mm (3.5 inches)89%moderate
December Weather2°C (35°F)74 mm (2.9 inches)86%low

Compare Ansonia's Climate with Cities Worldwide