nomadseason

September Weather in Riverdale Park, United States

Last updated: June 24, 2025

In Riverdale Park, United States, the average temperature in September settles at a pleasant 22°C (72°F). However, don't be surprised by the extremes—temperatures can dip to a cool 5°C (42°F) or soar up to a sweltering 36°C (97°F). Expect an average of 95 mm (3.8 in) of precipitation over 11 days, accompanied by a noteworthy average humidity of 75%.

September Temperature in Riverdale Park

In September in Riverdale Park, the average temperature is 22°C (72°F), with maximums reaching 36°C (97°F) and minimums dipping as low as 5°C (42°F). This range makes it a perfect time for travelers to enjoy comfortable outdoor activities while being prepared for warm days and cooler nights.

September Weather in Riverdale Park: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Riverdale Park, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Riverdale Park, September typically has an average temperature of 22°C (72°F), with highs reaching up to 36°C (97°F) and lows dropping to around 5°C (42°F).
JanFebMarAprMayJunJulAugSepOctNovDec374146566675807772624740
Data source: Temperature data for Riverdale Park 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 Riverdale Park

In Riverdale Park in September, the precipitation amount is 95 mm (3.8 in) spread over 11 days.

September Precipitation Trends in Riverdale Park

The chart displays monthly precipitation patterns in Riverdale Park, 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 Riverdale Park, September typically receives around 95 mm (3.8 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec619887100127118157140951058193
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

September Humidity in Riverdale Park

In Riverdale Park in September, humidity is 75%. With an average temperature of 22°C (72°F), this humidity feels like a warm embrace, making outdoor activities enjoyable yet requiring travelers to stay hydrated and take breaks in shaded areas.

September Average Humidity in Riverdale Park

This chart illustrates the average monthly humidity levels in Riverdale Park, 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 Riverdale Park is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%83%81%78%79%74%72%75%81%85%84%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Riverdale Park

In Riverdale Park 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 Riverdale Park.

Maximum UV Index Levels in Riverdale Park for September

The chart shows the monthly maximum UV Index (UVI) for Riverdale Park 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 Riverdale Park typically reaches 8, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec357910101098753
Data source: Riverdale Park 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 Riverdale Park Compares to Other Months

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

This table compares monthly weather conditions in Riverdale Park, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather3°C (37°F)61 mm (2.4 inches)84%moderate
February Weather5°C (41°F)98 mm (3.9 inches)83%moderate
March Weather8°C (46°F)87 mm (3.4 inches)83%high
April Weather14°C (57°F)100 mm (4.0 inches)81%very high
May Weather19°C (66°F)127 mm (5.0 inches)78%very high
June Weather24°C (75°F)118 mm (4.7 inches)79%very high
July Weather27°C (81°F)157 mm (6.2 inches)74%very high
August Weather25°C (77°F)140 mm (5.5 inches)72%very high
September Weather22°C (72°F)95 mm (3.8 inches)75%very high
October Weather17°C (62°F)104 mm (4.1 inches)81%high
November Weather8°C (47°F)81 mm (3.2 inches)85%moderate
December Weather5°C (41°F)93 mm (3.7 inches)84%moderate

Compare Riverdale Park's Climate with Cities Worldwide