September Weather in Mendota, United States

Last updated: June 24, 2025

In Mendota, United States, the average temperature in September hovers around 20°C (68°F), making it a pleasant time to explore. However, be prepared for a temperature range that can dip as low as 3°C (38°F) and soar up to 35°C (95°F). With an average precipitation of 100 mm (3.9 in) spread over 9 days, it’s wise to carry an umbrella or raincoat. Additionally, enjoy the balmy atmosphere with an average humidity of 80% that keeps the air comfortably moist.

September Temperature in Mendota

In September in Mendota, the average temperature is 20°C (68°F). Maximums can reach up to 35°C (95°F), while minimums can drop as low as 3°C (38°F). Be sure to pack a variety of clothing to accommodate the temperature fluctuations during your travels.

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

The chart illustrates September temperature patterns in Mendota, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Mendota, September typically has an average temperature of 20°C (68°F), with highs reaching up to 35°C (95°F) and lows dropping to around 3°C (38°F).

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

September Precipitation in Mendota

In Mendota in September, the precipitation amount is 100 mm (3.9 in) spread over 9 days.

September Precipitation Trends in Mendota

The chart displays monthly precipitation patterns in Mendota, 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 Mendota, September typically receives around 100 mm (3.9 inches) of precipitation spread over approximately 9 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 Mendota

In Mendota in September, humidity is 80%. With an average temperature of 20°C (68°F), this humidity feels like traveling through a warm, dense blanket that clings to your skin, making you feel both sticky and lethargic as you explore the sights.

September Average Humidity in Mendota

This chart illustrates the average monthly humidity levels in Mendota, 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 Mendota is approximately 80%, 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 Mendota

In Mendota 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 Mendota.

Maximum UV Index Levels in Mendota for September

The chart shows the monthly maximum UV Index (UVI) for Mendota 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 Mendota typically reaches 8, which falls under the very high exposure category.

Data source: Mendota 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 Mendota Compares to Other Months

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

This table compares monthly weather conditions in Mendota, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (25°F)	61 mm (2.4 inches)	82%	moderate
February Weather	-3°C (27°F)	62 mm (2.4 inches)	83%	moderate
March Weather	4°C (40°F)	90 mm (3.5 inches)	84%	high
April Weather	10°C (49°F)	115 mm (4.5 inches)	85%	very high
May Weather	17°C (62°F)	165 mm (6.5 inches)	79%	very high
June Weather	23°C (73°F)	142 mm (5.6 inches)	82%	very high
July Weather	24°C (76°F)	103 mm (4.1 inches)	80%	very high
August Weather	23°C (73°F)	72 mm (2.8 inches)	81%	very high
September Weather	20°C (68°F)	100 mm (3.9 inches)	80%	very high
October Weather	12°C (55°F)	130 mm (5.1 inches)	82%	high
November Weather	4°C (39°F)	55 mm (2.2 inches)	88%	moderate
December Weather	0°C (33°F)	51 mm (2.0 inches)	84%	low