September Weather in Patterson, United States

Last updated: June 24, 2025

In September, the average temperature in Patterson, United States is a warm 26°C (80°F), with a comfortable minimum of 15°C (59°F) and a peak of 35°C (95°F). Be prepared for some rainfall, as 169 mm (6.6 in) of precipitation can be expected over 17 days. The average humidity hovers around 79%, adding to the lively atmosphere of the season.

September Temperature in Patterson

In September in Patterson, the average temperature is 26°C (80°F). Maximums can reach 35°C (95°F), while minimums can drop to as low as 15°C (59°F). This pleasant climate makes it an ideal time for travelers to explore and enjoy the outdoor activities that Patterson has to offer.

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

The chart illustrates September temperature patterns in Patterson, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Patterson, September typically has an average temperature of 26°C (80°F), with highs reaching up to 35°C (95°F) and lows dropping to around 15°C (59°F).

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

September Precipitation in Patterson

In Patterson in September, the precipitation amount is 169 mm (6.6 in) occurring over the course of 17 days.

September Precipitation Trends in Patterson

The chart displays monthly precipitation patterns in Patterson, 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 Patterson, September typically receives around 169 mm (6.6 inches) of precipitation spread over approximately 17 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 Patterson

In Patterson in September, humidity is 79%. With an average temperature of 26°C (80°F), this humidity feels like an enveloping warm blanket, making travel feel slightly sluggish and prompting frequent hydration breaks to stay comfortable while exploring the sights.

September Average Humidity in Patterson

This chart illustrates the average monthly humidity levels in Patterson, 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 Patterson is approximately 79%, 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 Patterson

In Patterson in September, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Patterson.

Maximum UV Index Levels in Patterson for September

The chart shows the monthly maximum UV Index (UVI) for Patterson 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 Patterson typically reaches 11, which falls under the extreme exposure category.

Data source: Patterson 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 Patterson Compares to Other Months

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

This table compares monthly weather conditions in Patterson, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	13°C (55°F)	89 mm (3.5 inches)	81%	moderate
February Weather	16°C (60°F)	97 mm (3.8 inches)	81%	very high
March Weather	19°C (66°F)	59 mm (2.3 inches)	79%	very high
April Weather	21°C (70°F)	115 mm (4.5 inches)	81%	extreme
May Weather	25°C (77°F)	149 mm (5.9 inches)	77%	extreme
June Weather	27°C (82°F)	210 mm (8.3 inches)	74%	extreme
July Weather	28°C (83°F)	226 mm (8.9 inches)	74%	extreme
August Weather	28°C (82°F)	211 mm (8.3 inches)	73%	extreme
September Weather	26°C (80°F)	169 mm (6.6 inches)	79%	extreme
October Weather	23°C (74°F)	112 mm (4.4 inches)	77%	very high
November Weather	16°C (62°F)	65 mm (2.6 inches)	81%	high
December Weather	14°C (58°F)	96 mm (3.8 inches)	84%	moderate