Contra Costa County, California 

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Weather in Contra Costa County, California

The most pleasant months of the year for Contra Costa County are October, June and May. In Contra Costa County, there are 6 comfortable months with high temperatures in the range of 70-85°. July is the hottest month for Contra Costa County with an average high temperature of 84.2°, which ranks it as cooler than most places in California. Any measurable snowfall is a rare occurance in Contra Costa County. There are few days during the summer when the humidity becomes unpleasant.


Today's Weather - Contra Costa, CA

8 PM PST

Clear

77°F

7 DAY FORECASTDESCRIPTIONHIGH/LOWWIND
TonightClear63° / 92°SSW 8 mph
Thursday NightPartly Cloudy70° / 98°SW 3 to 10 mph
Friday NightMostly Clear72° / 96°WSW 2 to 10 mph
Saturday NightPartly Cloudy67° / 91°WSW 9 to 14 mph
Sunday NightPartly Cloudy67° / 90°WSW 12 mph
Monday NightPartly Cloudy67° / 91°WSW 12 mph
Tuesday NightMostly Clear65° / 89°WSW 13 mph

Weather Highlights

Summer High: the July high is around 84 degrees
Winter Low: the January low is 40
Rain: averages 21 inches of rain a year
Snow: averages 0 inches of snow a year


BESTPLACES COMFORT INDEX

The annual BestPlaces Comfort Index for the Contra Costa County area is 8.5 (10=best), which means it is more comfortable than most places in California.

8.5 / 10

A higher score indicates a more comfortable year-round climate. The US average for the comfort index is 7. Our index is based on the total number of days annually within the comfort range of 70-80 degrees, and we also applied a penalty for days of excessive humidity.


Average Monthly High and Low (°F)
HighLow
January56° 40°
February61° 43°
March65° 45°
April70° 47°
May75° 51°
June81° 55°
July84° 56°
August84° 57°
September82° 55°
October75° 51°
November64° 45°
December57° 40°
Hot, Freezing, Rainy, Snowy Days: Contra Costa
Hot
Days
Freezing
Days
Rainy
Days
Snowy
Days
January03110
February01100
March0090
April0060
May2030
June6010
July10000
August9000
September7010
October1030
November0170
December03110

YOU SHOULD KNOW

Many people confuse weather and climate but they are different. Weather is the conditions of the atmosphere over a short period of time, and climate is how the atmosphere is over long periods of time.

Weather is how the atmosphere is behaving and its effects upon life and human activities. Weather can change from minute-to-minute. Most people think of weather in terms of temperature, humidity, precipitation, cloudiness, brightness, visibility, wind, and atmospheric pressure.

Climate is the description of the long-term pattern of weather in a place. Climate can mean the average weather for a particular region and time period taken over 30 years. Climate is the average of weather over time.


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MAPS OF CONTRA COSTA COUNTY, CALIFORNIA
ZIP CODES IN CONTRA COSTA COUNTY, CALIFORNIA
94565, 94509, 94806, 94513, 94553, 94521, 94531, 94582, 94561, 94804, ... 43 more

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