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September Weather in Mendon, United States

Last updated: June 24, 2025

In Mendon, United States, the average temperature in September is a pleasant 17°C (63°F). Expect a range, with minimums dropping to 1°C (33°F) and soaring maximums reaching 35°C (94°F). Be prepared for some moisture, as the region sees about 28 mm (1.1 in) of precipitation over approximately 4 days. The average humidity lingers around 46%, making for a comfortably mild climate.

September Temperature in Mendon

In September in Mendon, the average temperature is 17°C (63°F). The maximum can reach 35°C (94°F) and the minimum can be as low as 1°C (33°F). Be prepared for a wide range of temperatures and pack accordingly for your travels!

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

The chart illustrates September temperature patterns in Mendon, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mendon, September typically has an average temperature of 17°C (63°F), with highs reaching up to 35°C (94°F) and lows dropping to around 1°C (33°F).
JanFebMarAprMayJunJulAugSepOctNovDec252938465568767363473726
Data source: Temperature data for Mendon 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 Mendon

In Mendon in September, the precipitation amount is 28 mm (1.1 in) over the course of 4 days.

September Precipitation Trends in Mendon

The chart displays monthly precipitation patterns in Mendon, 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 Mendon, September typically receives around 28 mm (1.1 inches) of precipitation spread over approximately 4 days.
JanFebMarAprMayJunJulAugSepOctNovDec56675060431781528364247
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Mendon

In Mendon in September, humidity is 46%. With an average temperature of 17°C (63°F), this humidity feels like a mild embrace—comfortable for exploring the sights, though you might notice a slight heaviness in the air that encourages a leisurely pace as you take in the vibrant surroundings.

September Average Humidity in Mendon

This chart illustrates the average monthly humidity levels in Mendon, 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 Mendon is approximately 46%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%92%84%75%62%56%44%37%46%67%84%88%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Mendon

In Mendon 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 Mendon.

Maximum UV Index Levels in Mendon for September

The chart shows the monthly maximum UV Index (UVI) for Mendon 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 Mendon typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3579101111109643
Data source: Mendon 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 Mendon Compares to Other Months

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

This table compares monthly weather conditions in Mendon, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)56 mm (2.2 inches)91%moderate
February Weather-2°C (29°F)67 mm (2.6 inches)92%moderate
March Weather3°C (38°F)50 mm (2.0 inches)84%high
April Weather8°C (47°F)60 mm (2.4 inches)74%very high
May Weather13°C (56°F)43 mm (1.7 inches)62%very high
June Weather20°C (68°F)17 mm (0.7 inches)56%extreme
July Weather24°C (76°F)8 mm (0.3 inches)44%extreme
August Weather23°C (73°F)15 mm (0.6 inches)37%very high
September Weather17°C (63°F)28 mm (1.1 inches)46%very high
October Weather8°C (48°F)36 mm (1.4 inches)67%high
November Weather3°C (37°F)42 mm (1.6 inches)84%moderate
December Weather-3°C (26°F)47 mm (1.9 inches)88%moderate

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