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September Weather in Middletown, United States

Last updated: June 24, 2025

In Middletown, United States, the average temperature in September hovers around 18°C (65°F). During this time, temperatures can dip as low as 2°C (35°F) or soar up to 35°C (95°F). Expect about 94 mm (3.7 in) of precipitation over 11 days, contributing to an average humidity of 80%. Enjoy the diverse climate while exploring!

September Temperature in Middletown

In September in Middletown, the average temperature is 18°C (65°F). Maximum temperatures can reach 35°C (95°F), while minimums can drop as low as 2°C (35°F). Be prepared for a wide range of temperatures during your travels, so pack accordingly!

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

The chart illustrates September temperature patterns in Middletown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Middletown, September typically has an average temperature of 18°C (65°F), with highs reaching up to 35°C (95°F) and lows dropping to around 2°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec252736465970747265533832
Data source: Temperature data for Middletown 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 Middletown

In Middletown in September, the precipitation amount is 94 mm (3.7 in) over the course of 11 days.

September Precipitation Trends in Middletown

The chart displays monthly precipitation patterns in Middletown, 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 Middletown, September typically receives around 94 mm (3.7 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec626563891151157172941126358
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Middletown

In Middletown in September, humidity is 80%. With an average temperature of 18°C (65°F), this humidity feels like wandering through a warm, damp blanket, making every step slightly heavy and resulting in a constant sheen of sweat, which can be both refreshing and exhausting for travelers.

September Average Humidity in Middletown

This chart illustrates the average monthly humidity levels in Middletown, 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 Middletown is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%87%85%86%80%80%80%81%80%84%90%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Middletown

In Middletown in September, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more detailed information, you can check the Hourly UV Index in Middletown.

Maximum UV Index Levels in Middletown for September

The chart shows the monthly maximum UV Index (UVI) for Middletown 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 Middletown typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec24589101097532
Data source: Middletown 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 Middletown Compares to Other Months

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

This table compares monthly weather conditions in Middletown, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)62 mm (2.4 inches)88%low
February Weather-3°C (27°F)65 mm (2.6 inches)87%moderate
March Weather2°C (36°F)63 mm (2.5 inches)85%moderate
April Weather8°C (46°F)89 mm (3.5 inches)86%very high
May Weather15°C (60°F)115 mm (4.5 inches)80%very high
June Weather21°C (70°F)115 mm (4.5 inches)80%very high
July Weather24°C (75°F)71 mm (2.8 inches)80%very high
August Weather22°C (72°F)72 mm (2.8 inches)80%very high
September Weather18°C (65°F)94 mm (3.7 inches)80%high
October Weather12°C (53°F)112 mm (4.4 inches)84%moderate
November Weather3°C (38°F)63 mm (2.5 inches)89%moderate
December Weather0°C (32°F)58 mm (2.3 inches)86%low

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