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September Weather in Webster, United States

Last updated: June 24, 2025

In Webster, United States, the average temperature in September is a comfortable 17°C (62°F). Temperatures can vary, dipping as low as 0°C (32°F) and rising up to 30°C (87°F). During this month, expect about 90 mm (3.6 in) of precipitation over roughly 10 days, with the average humidity lingering around 80%.

September Temperature in Webster

In September in Webster, the average temperature is 17°C (62°F). Maximums can reach 30°C (87°F), and minimums can drop as low as 0°C (32°F). Overall, this climate makes Webster an ideal destination for travelers seeking a pleasant mix of warm and cool weather.

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

The chart illustrates September temperature patterns in Webster, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Webster, September typically has an average temperature of 17°C (62°F), with highs reaching up to 30°C (87°F) and lows dropping to around 0°C (32°F).
JanFebMarAprMayJunJulAugSepOctNovDec141530405668726962473121
Data source: Temperature data for Webster 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 Webster

In Webster in September, the precipitation amount is 90 mm (3.6 in) spread over the course of 10 days.

September Precipitation Trends in Webster

The chart displays monthly precipitation patterns in Webster, 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 Webster, September typically receives around 90 mm (3.6 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec22324586978810912090974159
Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.
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September Humidity in Webster

In Webster in September, humidity is 80%. With an average temperature of 17°C (62°F), this humidity feels like a heavy blanket wrapping around you, making travel sticky and uncomfortable, and often leaving you longing for a refreshing breeze.

September Average Humidity in Webster

This chart illustrates the average monthly humidity levels in Webster, 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 Webster is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%89%86%85%79%80%80%78%80%84%89%85%
Data source: Humidity data for September generated using information from the Copernicus Climate Change Service.

September UV Index in Webster

In Webster 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 Webster.

Maximum UV Index Levels in Webster for September

The chart shows the monthly maximum UV Index (UVI) for Webster 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 Webster typically reaches 7, which falls under the high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910987532
Data source: Webster 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 Webster Compares to Other Months

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

This table compares monthly weather conditions in Webster, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-10°C (14°F)22 mm (0.9 inches)88%low
February Weather-10°C (15°F)32 mm (1.3 inches)89%moderate
March Weather-1°C (30°F)45 mm (1.8 inches)86%moderate
April Weather5°C (41°F)86 mm (3.4 inches)85%high
May Weather13°C (56°F)97 mm (3.8 inches)79%very high
June Weather20°C (68°F)88 mm (3.4 inches)80%very high
July Weather22°C (72°F)109 mm (4.3 inches)80%very high
August Weather20°C (69°F)120 mm (4.7 inches)78%very high
September Weather17°C (62°F)90 mm (3.6 inches)80%high
October Weather8°C (47°F)97 mm (3.8 inches)84%moderate
November Weather0°C (32°F)41 mm (1.6 inches)89%moderate
December Weather-6°C (22°F)59 mm (2.3 inches)85%low

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