Hercules, CA Weather - Forecast & Monthly Averages

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Weather Quick Facts

The highest monthly average temperature in Hercules for July is 70.8 degrees
The lowest monthly average temperature in Hercules for December is 47.3 degrees
The most monthly precipitation in Hercules occurs in January with 3.3 inches
The air quality index in Hercules is 5% better than the national average
The pollution index in Hercules is 604% worse than the national average

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Hercules Average Temperature

In the event that the weather data was unavailable for this city, estimates based upon nearby cities were used.
Month	Temp. _(min)	Temp. _(max)	Temp. _(avg)	Precipitation
January	39°F	58°F	48°F	3.3"
February	43°F	62°F	52°F	3.0"
March	45°F	67°F	54°F	1.8"
April	47°F	71°F	57°F	1.9"
May	52°F	78°F	63°F	0.6"
June	56°F	85°F	68°F	0.0"
July	58°F	90°F	71°F	0.0"
August	57°F	90°F	70°F	0.0"
September	56°F	86°F	68°F	0.0"
October	50°F	77°F	62°F	1.4"
November	45°F	68°F	55°F	1.2"
December	40°F	57°F	47°F	2.3"

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Hercules air quality index & pollution index

In the event that the air quality/pollution data was unavailable for this city, estimates based upon nearby cities were used.
Index	Hercules	California	National
Air quality index	40	55	42
Pollution index	19,202,400	10,473,190	2,726,193

Hercules air quality information

Measurement	Total
Days measured	365
Days with good air quality	290
Days with moderate air quality	74
Days w/ poor A.Q. for sensitive groups	1
Days with unhealthy air quality	0

Hercules air quality information

Pollutant	Total
Arsenic	0.180%
Benzene	0.140%
Carbon Tetrachloride	0.010%
Lead	0.280%
Mercury	0.060%

Average monthly Hercules temperature with heat index

Hercules monthly precipitation with daily maximum

Hercules monthly snow depth with daily maximum

Hercules monthly wind speed information

Nearby cities with good air quality

City	Population	Air Quality Index	National Avg.
Alhambra Valley, CA	1,051	40	20.0%
Martinez, CA	38,397	40	20.0%
Reliez Valley, CA	3,321	40	20.0%
Shell Ridge, CA	1,081	40	20.0%
Emeryville, CA	11,679	40	20.0%
Hercules, CA	26,090	40	20.0%

Cities with similar population

City	Population	Air Quality Index	National Avg.
Neenah, WI	26,083	37	26.0%
Milford, MA	26,072	40	20.0%
Wethersfield, CT	26,068	41	18.0%
Bessemer, AL	26,063	53	6.0%
West Odessa, TX	26,117	28	44.0%
Hercules, CA	26,090	40	20.0%

Source: The Hercules, CA weather data displayed above is derived from the NOAA (National Oceanic and Atmospheric). Air quality and pollution data is derived from the EPA (United States Environmental Protection Agency). Air quality and pollution levels measured in a particular area may not be representative of the entire county.