September Weather in Diamondville, United States

Last updated: June 24, 2025

In September, the average temperature in Diamondville, United States is a comfortable 14°C (58°F). However, be prepared for a range, as the minimum can drop to -3°C (27°F), while the maximum can soar up to 32°C (89°F). Expect about 31 mm (1.2 in) of precipitation spread over 6 days, and experience an average humidity of 46%. Whether you're planning outdoor activities or cozy indoor time, this month offers a little bit of everything!

September Temperature in Diamondville

In September in Diamondville, the average temperature is 14°C (58°F). The maximum can reach 32°C (89°F), while the minimum can drop as low as -3°C (27°F). Be prepared for a wide range of temperatures when traveling to Diamondville during this month, ensuring you pack accordingly.

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

The chart illustrates September temperature patterns in Diamondville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Diamondville, September typically has an average temperature of 14°C (58°F), with highs reaching up to 32°C (89°F) and lows dropping to around -3°C (27°F).

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

September Precipitation in Diamondville

In Diamondville in September, the precipitation amount is 31 mm (1.2 in) over a span of 6 days.

September Precipitation Trends in Diamondville

The chart displays monthly precipitation patterns in Diamondville, 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 Diamondville, September typically receives around 31 mm (1.2 inches) of precipitation spread over approximately 6 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 Diamondville

In Diamondville in September, humidity is 46%. With an average temperature of 14°C (58°F), this humidity feels like a refreshing yet slightly brisk breeze, making it quite pleasant for traveling as you can comfortably explore without feeling overheated.

September Average Humidity in Diamondville

This chart illustrates the average monthly humidity levels in Diamondville, 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 Diamondville is approximately 46%, 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 Diamondville

In Diamondville in September, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Diamondville.

Maximum UV Index Levels in Diamondville for September

The chart shows the monthly maximum UV Index (UVI) for Diamondville 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 Diamondville typically reaches 10, which falls under the very high exposure category.

Data source: Diamondville 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 Diamondville Compares to Other Months

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

This table compares monthly weather conditions in Diamondville, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-7°C (19°F)	33 mm (1.3 inches)	91%	moderate
February Weather	-6°C (22°F)	39 mm (1.5 inches)	92%	high
March Weather	-1°C (30°F)	41 mm (1.6 inches)	84%	high
April Weather	3°C (38°F)	49 mm (1.9 inches)	74%	very high
May Weather	9°C (49°F)	70 mm (2.7 inches)	62%	extreme
June Weather	17°C (62°F)	22 mm (0.9 inches)	56%	extreme
July Weather	21°C (71°F)	20 mm (0.8 inches)	44%	extreme
August Weather	20°C (68°F)	24 mm (1.0 inches)	37%	extreme
September Weather	14°C (58°F)	31 mm (1.2 inches)	46%	very high
October Weather	5°C (41°F)	29 mm (1.1 inches)	67%	high
November Weather	0°C (32°F)	35 mm (1.4 inches)	84%	moderate
December Weather	-6°C (21°F)	26 mm (1.0 inches)	88%	moderate