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September Weather in Deer Park, United States

Last updated: June 24, 2025

In Deer Park, United States, the average temperature in September hovers around 16°C (61°F), with extremes ranging from a cool 1°C (35°F) to a warm 34°C (94°F). Expect light precipitation, averaging 32 mm (1.3 in) over about 5 days, and enjoy a comfortable average humidity of 60%.

September Temperature in Deer Park

In September in Deer Park, the average temperature is 16°C (61°F). The maximum can reach 34°C (94°F), while the minimum can drop as low as 1°C (35°F). Be prepared for a wide range of temperatures, making it essential to pack layers for your trip.

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

The chart illustrates September temperature patterns in Deer Park, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Deer Park, September typically has an average temperature of 16°C (61°F), with highs reaching up to 34°C (94°F) and lows dropping to around 1°C (35°F).
JanFebMarAprMayJunJulAugSepOctNovDec292838465766747261463730
Data source: Temperature data for Deer Park 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 Deer Park

In Deer Park in September, the precipitation amount is 32 mm (1.3 in) over the course of 5 days.

September Precipitation Trends in Deer Park

The chart displays monthly precipitation patterns in Deer 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 Deer Park, September typically receives around 32 mm (1.3 inches) of precipitation spread over approximately 5 days.
JanFebMarAprMayJunJulAugSepOctNovDec82656155482241532587481
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Deer Park

In Deer Park in September, humidity is 60%. With an average temperature of 16°C (61°F), this humidity feels like a refreshing yet slightly clingy embrace, making it ideal for leisurely sightseeing, though it might leave you reaching for a cool drink more often.

September Average Humidity in Deer Park

This chart illustrates the average monthly humidity levels in Deer 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 Deer Park is approximately 60%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec85%86%86%82%77%79%77%62%60%80%87%86%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Deer Park

In Deer Park 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 Deer Park.

Maximum UV Index Levels in Deer Park for September

The chart shows the monthly maximum UV Index (UVI) for Deer 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 Deer Park typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245689997432
Data source: Deer 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 Deer Park Compares to Other Months

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

This table compares monthly weather conditions in Deer Park, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-2°C (29°F)82 mm (3.2 inches)85%low
February Weather-2°C (29°F)65 mm (2.5 inches)86%moderate
March Weather3°C (38°F)61 mm (2.4 inches)86%moderate
April Weather8°C (46°F)55 mm (2.2 inches)82%high
May Weather14°C (58°F)48 mm (1.9 inches)77%very high
June Weather19°C (66°F)22 mm (0.8 inches)79%very high
July Weather23°C (74°F)4 mm (0.2 inches)77%very high
August Weather22°C (73°F)15 mm (0.6 inches)62%very high
September Weather16°C (61°F)32 mm (1.3 inches)60%high
October Weather8°C (47°F)58 mm (2.3 inches)80%moderate
November Weather3°C (37°F)74 mm (2.9 inches)87%moderate
December Weather-1°C (31°F)80 mm (3.2 inches)86%low

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