September Weather in Pleasant Hill, United States

Last updated: June 24, 2025

In Pleasant Hill, United States, the average temperature in September is a warm 26°C (80°F). Expect a minimum of 12°C (55°F) and a maximum soaring to 39°C (102°F). With precipitation totaling 158 mm (6.2 in) over 12 days, the average humidity sits at a comfortable 72%. Prepare for a month of warmth and occasional rain!

September Temperature in Pleasant Hill

In September in Pleasant Hill, the average temperature is 26°C (80°F), with maximums reaching 39°C (102°F) and minimums dipping as low as 12°C (55°F). Be prepared for warm days and cooler evenings while exploring the vibrant sights of Pleasant Hill.

September Weather in Pleasant Hill: Daily Temperature Highs, Lows, and Averages

The chart illustrates September temperature patterns in Pleasant Hill, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Pleasant Hill, September typically has an average temperature of 26°C (80°F), with highs reaching up to 39°C (102°F) and lows dropping to around 12°C (55°F).

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

September Precipitation in Pleasant Hill

In Pleasant Hill in September, the precipitation amount is 158 mm (6.2 in) over a span of 12 days.

September Precipitation Trends in Pleasant Hill

The chart displays monthly precipitation patterns in Pleasant Hill, 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 Pleasant Hill, September typically receives around 158 mm (6.2 inches) of precipitation spread over approximately 12 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 Pleasant Hill

In Pleasant Hill in September, humidity is 72%. With an average temperature of 26°C (80°F), this humidity feels like a warm embrace, making traveling feel a bit heavier, yet invigorating as you navigate the vibrant atmosphere, surrounded by the rich scents and lively sounds of the locale.

September Average Humidity in Pleasant Hill

This chart illustrates the average monthly humidity levels in Pleasant Hill, 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 Pleasant Hill is approximately 72%, 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 Pleasant Hill

In Pleasant Hill 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 Pleasant Hill.

Maximum UV Index Levels in Pleasant Hill for September

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

Data source: Pleasant Hill 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 Pleasant Hill Compares to Other Months

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

This table compares monthly weather conditions in Pleasant Hill, showing how September’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	11°C (52°F)	108 mm (4.3 inches)	81%	moderate
February Weather	13°C (55°F)	124 mm (4.9 inches)	81%	very high
March Weather	18°C (64°F)	102 mm (4.0 inches)	79%	very high
April Weather	20°C (67°F)	139 mm (5.5 inches)	80%	very high
May Weather	24°C (76°F)	166 mm (6.5 inches)	81%	extreme
June Weather	27°C (81°F)	138 mm (5.4 inches)	76%	extreme
July Weather	28°C (84°F)	98 mm (3.9 inches)	73%	extreme
August Weather	29°C (84°F)	167 mm (6.6 inches)	71%	extreme
September Weather	26°C (80°F)	158 mm (6.2 inches)	72%	very high
October Weather	21°C (70°F)	113 mm (4.5 inches)	73%	very high
November Weather	15°C (60°F)	72 mm (2.8 inches)	83%	high
December Weather	13°C (55°F)	117 mm (4.6 inches)	88%	moderate