September Weather in Richwood, United States

Last updated: June 24, 2025

In September, the average temperature in Richwood, United States hovers around 26°C (79°F). Expect a comfortable minimum of 12°C (54°F), while heatwaves can push the mercury up to a sizzling 39°C (102°F). With an average humidity of 73%, you’ll also encounter around 88 mm (3.5 in) of precipitation over 8 days. Whether you're soaking up the sun or seeking shelter from the rains, Richwood offers a unique climate experience in September!

September Temperature in Richwood

In September in Richwood, the average temperature is 26°C (79°F). The maximum can reach 39°C (102°F) and the minimum can be as low as 12°C (54°F). Be prepared for a warm climate, with occasional cool evenings, making it an ideal time for both outdoor activities and relaxation.

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

The chart illustrates September temperature patterns in Richwood, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Richwood, September typically has an average temperature of 26°C (79°F), with highs reaching up to 39°C (102°F) and lows dropping to around 12°C (54°F).

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

September Precipitation in Richwood

In Richwood in September, the precipitation amount is 88 mm (3.5 in) over the course of 8 days.

September Precipitation Trends in Richwood

The chart displays monthly precipitation patterns in Richwood, 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 Richwood, September typically receives around 88 mm (3.5 inches) of precipitation spread over approximately 8 days.

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

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Millimeters (mm) Inches (in)

September Humidity in Richwood

In Richwood in September, humidity is 73%. With an average temperature of 26°C (79°F), this humidity feels like a warm, sticky embrace, making travel slightly uncomfortable as you navigate through the heat with a constant sheen of sweat on your skin.

September Average Humidity in Richwood

This chart illustrates the average monthly humidity levels in Richwood, 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 Richwood is approximately 73%, 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 Richwood

In Richwood in September, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Richwood.

Maximum UV Index Levels in Richwood for September

The chart shows the monthly maximum UV Index (UVI) for Richwood 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 Richwood typically reaches 9, which falls under the very high exposure category.

Data source: Richwood 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 Richwood Compares to Other Months

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

This table compares monthly weather conditions in Richwood, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	9°C (48°F)	121 mm (4.8 inches)	84%	moderate
February Weather	11°C (52°F)	197 mm (7.8 inches)	83%	high
March Weather	16°C (61°F)	147 mm (5.8 inches)	80%	very high
April Weather	18°C (65°F)	164 mm (6.5 inches)	82%	extreme
May Weather	23°C (74°F)	129 mm (5.1 inches)	83%	extreme
June Weather	27°C (80°F)	121 mm (4.8 inches)	80%	extreme
July Weather	28°C (83°F)	93 mm (3.7 inches)	80%	extreme
August Weather	28°C (83°F)	97 mm (3.8 inches)	75%	extreme
September Weather	26°C (79°F)	88 mm (3.5 inches)	73%	very high
October Weather	20°C (69°F)	133 mm (5.2 inches)	76%	very high
November Weather	13°C (56°F)	87 mm (3.4 inches)	84%	high
December Weather	11°C (52°F)	122 mm (4.8 inches)	88%	moderate