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September Weather in Derby Center, United States

Last updated: June 24, 2025

In September, the average temperature in Derby Center, United States hovers around 15°C (59°F), offering a mild climate. However, be prepared for temperature fluctuations, as the minimum can drop to -4°C (26°F) while the maximum may soar to 30°C (86°F). Expect some rain during your stay, with an average precipitation of 84 mm (3.3 in) over 11 days. Don't forget, the average humidity level is relatively high at 77%, adding a touch of moisture to the air.

September Temperature in Derby Center

In September in Derby Center, the average temperature is 15°C (59°F), with maximums reaching 30°C (86°F) and minimums dropping as low as -4°C (26°F). It's advisable to pack layers to accommodate the wide range of temperatures while enjoying your travels.

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

The chart illustrates September temperature patterns in Derby Center, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Derby Center, September typically has an average temperature of 15°C (59°F), with highs reaching up to 30°C (86°F) and lows dropping to around -4°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec171927415462686658473222
Data source: Temperature data for Derby 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 Derby Center

In Derby Center, in September, the precipitation amount is 84 mm (3.3 in) during a period of 11 days.

September Precipitation Trends in Derby Center

The chart displays monthly precipitation patterns in Derby 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 Derby Center, September typically receives around 84 mm (3.3 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec8984831131051171261088414711884
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Derby Center

In Derby Center in September, humidity is 77%. With an average temperature of 15°C (59°F), this humidity feels like a warm blanket enveloping you, making it essential to stay hydrated and choose light, breathable clothing for comfortable travel.

September Average Humidity in Derby Center

This chart illustrates the average monthly humidity levels in Derby 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 Derby Center is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec91%89%85%84%78%72%75%74%77%85%86%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Derby Center

In Derby Center 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 Derby Center.

Maximum UV Index Levels in Derby Center for September

The chart shows the monthly maximum UV Index (UVI) for Derby 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 Derby Center typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245799987532
Data source: Derby 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 Derby Center Compares to Other Months

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

This table compares monthly weather conditions in Derby Center, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (17°F)89 mm (3.5 inches)91%low
February Weather-7°C (20°F)84 mm (3.3 inches)89%moderate
March Weather-3°C (27°F)83 mm (3.3 inches)85%moderate
April Weather5°C (41°F)113 mm (4.5 inches)84%high
May Weather12°C (54°F)105 mm (4.1 inches)78%very high
June Weather17°C (63°F)117 mm (4.6 inches)72%very high
July Weather20°C (68°F)126 mm (4.9 inches)75%very high
August Weather19°C (66°F)108 mm (4.2 inches)74%very high
September Weather15°C (59°F)84 mm (3.3 inches)77%high
October Weather9°C (48°F)147 mm (5.8 inches)85%moderate
November Weather0°C (33°F)118 mm (4.6 inches)86%moderate
December Weather-5°C (23°F)84 mm (3.3 inches)85%low

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