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September Weather in East Haven, United States

Last updated: June 24, 2025

In East Haven, United States, the average temperature in September hovers around 20°C (69°F), with a comfortable minimum of 10°C (51°F) and a pleasant maximum of 29°C (85°F). Expect 99 mm (3.9 in) of precipitation spread over approximately 9 days, accompanied by an average humidity of 68%.

September Temperature in East Haven

In September in East Haven, the average temperature is 20°C (69°F). Maximums can reach 29°C (85°F), while minimums can drop to as low as 10°C (51°F). This mild climate makes it an ideal time for travelers to explore and enjoy outdoor activities.

September Weather in East Haven: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in East Haven, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In East Haven, September typically has an average temperature of 20°C (69°F), with highs reaching up to 29°C (85°F) and lows dropping to around 10°C (51°F).
JanFebMarAprMayJunJulAugSepOctNovDec343539475666747469604739
Data source: Temperature data for East Haven 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 East Haven

In East Haven in September, the precipitation amount is 99 mm (3.9 in) during a span of 9 days.

September Precipitation Trends in East Haven

The chart displays monthly precipitation patterns in East Haven, 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 East Haven, September typically receives around 99 mm (3.9 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec83115104141121841309299152105152
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in East Haven

In East Haven in September, humidity is 68%. With an average temperature of 20°C (69°F), this humidity feels like a warm embrace, making outdoor exploration both refreshing and slightly sticky, requiring occasional breaks in the shade to stay comfortable while traveling.

September Average Humidity in East Haven

This chart illustrates the average monthly humidity levels in East Haven, 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 East Haven is approximately 68%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%82%81%78%70%69%62%65%68%74%82%80%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in East Haven

In East Haven 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 East Haven.

Maximum UV Index Levels in East Haven for September

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

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

This table compares monthly weather conditions in East Haven, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather1°C (34°F)83 mm (3.3 inches)84%moderate
February Weather2°C (35°F)115 mm (4.5 inches)82%moderate
March Weather4°C (39°F)104 mm (4.1 inches)81%high
April Weather8°C (47°F)141 mm (5.5 inches)78%very high
May Weather13°C (57°F)121 mm (4.8 inches)69%very high
June Weather19°C (66°F)84 mm (3.3 inches)69%very high
July Weather23°C (74°F)129 mm (5.1 inches)62%very high
August Weather23°C (74°F)92 mm (3.6 inches)65%very high
September Weather20°C (69°F)99 mm (3.9 inches)68%very high
October Weather16°C (60°F)152 mm (6.0 inches)74%high
November Weather9°C (48°F)105 mm (4.1 inches)82%moderate
December Weather4°C (39°F)151 mm (6.0 inches)80%low

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