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September Weather in Harvey, United States

Last updated: June 24, 2025

In September, the average temperature in Harvey, United States hovers around 15°C (60°F). Expect lows of 4°C (40°F) and highs reaching 28°C (83°F). The region receives about 98 mm (3.9 in) of precipitation spread over 11 days, creating an atmosphere of 75% humidity.

September Temperature in Harvey

In September in Harvey, the average temperature is 15°C (60°F), with maximums reaching 28°C (83°F) and minimums dropping as low as 4°C (40°F). This makes it an ideal time for travelers who enjoy mild weather and a range of outdoor activities.

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

The chart illustrates September temperature patterns in Harvey, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Harvey, September typically has an average temperature of 15°C (60°F), with highs reaching up to 28°C (83°F) and lows dropping to around 4°C (40°F).
JanFebMarAprMayJunJulAugSepOctNovDec201928354757666559483426
Data source: Temperature data for Harvey 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 Harvey

In Harvey in September, the total precipitation amount is 98 mm (3.9 in) over the course of 11 days.

September Precipitation Trends in Harvey

The chart displays monthly precipitation patterns in Harvey, 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 Harvey, September typically receives around 98 mm (3.9 inches) of precipitation spread over approximately 11 days.
JanFebMarAprMayJunJulAugSepOctNovDec4762599473977899991287968
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Harvey

In Harvey in September, humidity is 75%. With an average temperature of 15°C (60°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor activities slightly uncomfortable and requiring extra hydration while exploring the sights.

September Average Humidity in Harvey

This chart illustrates the average monthly humidity levels in Harvey, 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 Harvey is approximately 75%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%93%88%86%77%74%71%72%76%83%86%90%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Harvey

In Harvey 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 Harvey.

Maximum UV Index Levels in Harvey for September

The chart shows the monthly maximum UV Index (UVI) for Harvey 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 Harvey typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec245789987532
Data source: Harvey 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 Harvey Compares to Other Months

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

This table compares monthly weather conditions in Harvey, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (21°F)47 mm (1.8 inches)92%low
February Weather-7°C (19°F)62 mm (2.4 inches)92%moderate
March Weather-2°C (28°F)59 mm (2.3 inches)88%moderate
April Weather2°C (36°F)94 mm (3.7 inches)86%high
May Weather8°C (47°F)73 mm (2.9 inches)77%very high
June Weather14°C (57°F)97 mm (3.8 inches)74%very high
July Weather19°C (66°F)78 mm (3.1 inches)71%very high
August Weather18°C (65°F)99 mm (3.9 inches)72%very high
September Weather15°C (60°F)98 mm (3.9 inches)75%high
October Weather9°C (48°F)128 mm (5.0 inches)83%moderate
November Weather1°C (35°F)79 mm (3.1 inches)86%moderate
December Weather-3°C (26°F)68 mm (2.7 inches)90%low

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