Contra Costa Centre has mild winters and warm summers, with very little rain
A typical July afternoon reaches 87°, a January night drops to 39°, and snow is almost unheard of.
A year in Contra Costa Centre at a glance
Each month’s typical high and low, and what it brings.
What a year in Contra Costa Centre feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
Rain and snow in Contra Costa Centre
December is the wettest month and July the driest. Rain or snow falls on about 56 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
No measurable snow in a normal year.
A year-round growing season
Freezing nights are uncommon in Contra Costa Centre.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
Living with Contra Costa Centre’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
Only 80% of years see a freezing night, so tender plants can stay out most winters.
About 0.0" in a normal winter.
Months averaging under 55° run from November through March. Heating is 65% of the year’s heating-and-cooling load.
About 47 days a year reach 90°, and July afternoons average 87°.
The nicest months are March, April, May, June, October and November. 1.0 miles of trails are waiting.
Parks & trails →Normals are averages. Ice storms, nor’easters, floods and heat waves are on the natural hazards page.
Natural hazards →Contra Costa Centre and its neighbors
Walnut Creek has the coldest January nights next door (39°) and Pleasant Hill the hottest July afternoons (87°). Tap a town to see its climate.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Contra Costa Centre averaged 1.6° warmer than the 1900s. The biggest change is in January (+2.2°).
A bigger shift than in 76% of U.S. towns.
Change by month
How Contra Costa Centre compares
Against every U.S. town on TownTapestry, each counted once, with its place in California.
Contra Costa Centre weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 56° | 39° | 4.1" | 0 | 10 | 0 | 45° – 55° |
| February | 61° | 42° | 3.9" | 0 | 10 | 0 | 46° – 57° |
| March | 66° | 44° | 3.1" | 0 | 8 | 0 | 49° – 61° |
| April | 70° | 46° | 1.4" | 0 | 5 | 0 | 53° – 62° |
| May | 76° | 50° | 0.6" | 0 | 3 | 0 | 57° – 70° |
| June | 83° | 54° | 0.1" | 0 | 1 | 0 | 64° – 72° |
| July | 87° | 56° | 0.0" | 0 | 0 | 0 | 68° – 76° |
| August | 87° | 56° | 0.0" | 0 | 0 | 0 | 68° – 76° |
| September | 85° | 54° | 0.1" | 0 | 1 | 0 | 65° – 73° |
| October | 77° | 50° | 1.0" | 0 | 3 | 0 | 60° – 71° |
| November | 65° | 44° | 2.0" | 0 | 6 | 0 | 47° – 59° |
| December | 57° | 39° | 4.1" | 0 | 9 | 0 | 44° – 51° |
| Year | 72° | 48° | 20.5" | 0.0" | 56 | 0 |
Heating and cooling a home in Contra Costa Centre
65% of the work is heating.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. Source: NOAA station normals.
How much a month can swing
A normal is an average. May swings the most: from 1991 to 2020 its average ranged from 57° to 70°. December is the most reliable, staying within 7°.
Common questions about Contra Costa Centre’s climate
What is the coldest month in Contra Costa Centre?
December, with a typical high of 57° and a low of 39°.
What is the hottest month in Contra Costa Centre?
July, with a typical high of 87° and a low of 56°. About 47 days a year reach 90°.
How much snow does Contra Costa Centre get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Contra Costa Centre?
Frost is uncommon. Only 80% of years see a night at 32° or below.
What is the rainiest month in Contra Costa Centre?
December, with 4.1 inches of rain and melted snow. The year totals 20 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Contra Costa Centre.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for Contra Costa Centre itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Concord WWTP, CA (4 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Today’s forecast: National Weather Service.