nomadseason

September Weather in Unionville, United States

Last updated: June 24, 2025

In September, the average temperature in Unionville, United States is a pleasant 24°C (75°F). During this time, temperatures can vary significantly, with a minimum of 8°C (46°F) and a maximum reaching up to 35°C (95°F). Be prepared for some rain, as the area experiences an average precipitation of 149 mm (5.9 in) over approximately 8 days. Don’t forget to stay hydrated, as the average humidity hovers around 75%!

September Temperature in Unionville

In September in Unionville, the average temperature is 24°C (75°F). Maximums can reach 35°C (95°F), and minimums can be as low as 8°C (46°F). This makes it an ideal time for travelers to enjoy a mix of warm and cool weather, perfect for exploring both outdoor and indoor activities.

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

The chart illustrates September temperature patterns in Unionville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Unionville, September typically has an average temperature of 24°C (75°F), with highs reaching up to 35°C (95°F) and lows dropping to around 8°C (46°F).
JanFebMarAprMayJunJulAugSepOctNovDec455054637177807975665248
Data source: Temperature data for Unionville generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

September Precipitation in Unionville

In Unionville in September, the total precipitation amount is 149 mm (5.9 in), occurring over the span of 8 days.

September Precipitation Trends in Unionville

The chart displays monthly precipitation patterns in Unionville, 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 Unionville, September typically receives around 149 mm (5.9 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec95122871051181031191241498087125
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Unionville

In Unionville in September humidity is 75%. With average temperature 24°C (75°F), this humidity feels like a thick blanket wrapping around you, making outdoor activities feel especially stifling and leaving you yearning for cool breezes and refreshingly cold drinks.

September Average Humidity in Unionville

This chart illustrates the average monthly humidity levels in Unionville, 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 Unionville is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%84%82%83%82%80%74%75%79%87%87%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Unionville

In Unionville 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 Unionville.

Maximum UV Index Levels in Unionville for September

The chart shows the monthly maximum UV Index (UVI) for Unionville 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 Unionville typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46810101111109853
Data source: Unionville 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 Unionville Compares to Other Months

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

This table compares monthly weather conditions in Unionville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather7°C (45°F)95 mm (3.7 inches)86%moderate
February Weather10°C (50°F)121 mm (4.8 inches)85%high
March Weather12°C (55°F)87 mm (3.4 inches)84%very high
April Weather17°C (63°F)105 mm (4.1 inches)82%very high
May Weather22°C (72°F)118 mm (4.6 inches)83%very high
June Weather25°C (77°F)103 mm (4.0 inches)82%extreme
July Weather27°C (80°F)119 mm (4.7 inches)80%extreme
August Weather26°C (79°F)123 mm (4.9 inches)74%very high
September Weather24°C (75°F)149 mm (5.9 inches)75%very high
October Weather19°C (66°F)80 mm (3.1 inches)79%very high
November Weather11°C (52°F)87 mm (3.4 inches)87%moderate
December Weather9°C (48°F)125 mm (4.9 inches)87%moderate

Compare Unionville's Climate with Cities Worldwide