September Weather in Webster, United States

Last updated: June 24, 2025

In September, the average temperature in Webster, United States hovers around 17°C (62°F), with a comfortable range from a cool 2°C (35°F) to a warm 32°C (90°F). Visitors can expect 87 mm (3.4 in) of precipitation over 8 days, accompanied by an average humidity of 77%. Be prepared for a mix of weather as you explore this charming destination!

September Temperature in Webster

In September in Webster, the average temperature is 17°C (62°F). Maximum temperatures can reach 32°C (90°F), while the minimum can drop to as low as 2°C (35°F). Visitors should prepare for a wide range of temperatures, ensuring they have both warm and cool clothing options.

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 32°C (90°F) and lows dropping to around 2°C (35°F).

Data source: Temperature data for Webster generated using information from the Copernicus Climate Change Service.

September Precipitation in Webster

In Webster in September, the precipitation amount is 87 mm (3.4 in), which occurs over a span of 8 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 87 mm (3.4 inches) of precipitation spread over approximately 8 days.

Data source: Precipitation data for September generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

September Humidity in Webster

In Webster in September humidity is 77%. With an average temperature of 17°C (62°F), this humidity feels like a warm embrace, creating a lush, almost tropical atmosphere that can be quite stifling for traveling, making it essential to stay hydrated and take frequent breaks in the shade.

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 77%, offering insight into how humid the weather typically is during this month.

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 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 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 8, which falls under the very high exposure category.

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.
	Temperature	Precipitation	Humidity	UV
January Weather	-10°C (14°F)	20 mm (0.8 inches)	81%	moderate
February Weather	-11°C (13°F)	16 mm (0.6 inches)	85%	moderate
March Weather	-1°C (30°F)	40 mm (1.6 inches)	76%	high
April Weather	4°C (40°F)	59 mm (2.3 inches)	79%	high
May Weather	13°C (56°F)	74 mm (2.9 inches)	76%	very high
June Weather	20°C (69°F)	79 mm (3.1 inches)	81%	very high
July Weather	23°C (73°F)	77 mm (3.0 inches)	82%	very high
August Weather	21°C (69°F)	103 mm (4.1 inches)	82%	very high
September Weather	17°C (62°F)	87 mm (3.4 inches)	77%	very high
October Weather	7°C (45°F)	81 mm (3.2 inches)	76%	moderate
November Weather	0°C (32°F)	22 mm (0.9 inches)	84%	moderate
December Weather	-5°C (23°F)	34 mm (1.3 inches)	81%	low