Concord, California Weather
Coastal fog thickens at dawn. Day 76 of spring. Read this microseason across nine climate regions →
Concord weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Overcast——86°55°—
- ThursdayJun 4Overcast——87°55°+1°
- FridayJun 5Overcast——92°61°+5°
- SaturdayJun 6Overcast——79°56°-13°
- SundayJun 7Overcast——83°53°+4°
- MondayJun 8Overcast——80°55°-3°
- TuesdayJun 9Overcast11%—75°58°-5°
PM2.5 at 15.9 µg/m³, PM10 at 21.8 µg/m³ — typical background levels with no transport signature. AQI flat over the last 6 hours (within ±3 points).
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
Ozone × UV × Sky
Ozone at AQI 45 now. With UV 9.6 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 58 by mid-afternoon.
- Present
- AQI 45
- UV peak
- 9.6 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 58
PM × Wind × Precip
PM2.5 at 15.9 µg/m³, PM10 at 21.8 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.73
- Wind
- breezy
- Recent rain
- 0h in last 6h
- Pattern
- background
Trends
Seven days of AQI and PM2.5.
Hourly air-quality data from the Copernicus Atmosphere Monitoring Service, charted across the past and next several days. Dashed lines mark the AQI breakpoints at 50 (Good → Moderate) and 100 (Moderate → Unhealthy for Sensitive Groups).
The higher the clouds, the finer the weather.
- Moonrise
- 5:55 AM
- Moonset
- 3:19 PM
- In sign
- ♑︎ Capricorn
Coastal fog thickens at dawn
Concord at a glance
- Today vs. normal: 79°F — typical for the season
- Last frost: April 4 (climatological average for this latitude)
- Microseason: Jun 1–5
- Planting window: Harvest spring lettuce before it bolts. Sow heat-tolerant greens.
Right now in the garden
Peak growing season
As of June 3, the growing season is at its peak — frost is months away. Continue succession-planting beans and summer squash. Start fall brassicas (broccoli, cabbage, kale) from seed indoors for transplanting in late summer.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | — | — |
| February | — | — |
| March | — | — |
| April | lettuce, peas, spinach, radishes | — |
| May | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | tomatoes, peppers, beans, squash | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | fall brassicas, garlic (overwinter), carrots | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | — | — |
| December | — | — |
A year in weather
August claims the title of Concord's warmest month at ~74°F mean temperature, while January marks the coldest at ~49°F. January brings peak rainfall at 3.2 inches, contrasting sharply with July's bone-dry 0.0 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 49° | 3.2″ | 5 |
| February | 53° | 3.2″ | 6 |
| March | 57° | 2.3″ | 6 |
| April | 60° | 1.1″ | 3 |
| May | 65° | 0.5″ | 1 |
| June | 71° | 0.2″ | 0 |
| July | 73° | 0.0″ | 0 |
| August | 74° | 0.0″ | 0 |
| September | 72° | 0.1″ | 0 |
| October | 65° | 0.7″ | 1 |
| November | 56° | 1.6″ | 4 |
| December | 50° | 3.2″ | 6 |
Regional context
Concord belongs to the hot-summer Mediterranean climate region, sharing temperature ranges, seasonal patterns, and growing conditions with nearby cities in this climate zone.
Similar climates: Los Angeles, CA, San Francisco, CA, San Diego, CA, Riverside, CA, Sacramento, CA.
Naturalist notes
Late May brings the distinctive drumming of acorn woodpeckers as they establish breeding territories in the valley oaks.
June marks when the California poppies reach their peak bloom, carpeting open hillsides in brilliant orange.
Frequently asked
- When does it freeze in Concord?
- Concord's last spring frost typically occurs around mid-April, while the first fall frost returns around mid-November.
- What is the rainy season in Concord?
- January stands as the wettest month with about 3.2 inches of rain on average, contributing to the city's roughly 16 inches annually.
- What is the warmest month in Concord?
- August typically claims the warmest temperatures, averaging about 74°F.
- What is the coldest month in Concord?
- January typically records the coldest temperatures, averaging about 49°F.
- When can I start a vegetable garden in Concord?
- Cool-season crops like peas and lettuce can be sown around the last spring frost in mid-April, while warm-season crops such as tomatoes and peppers should wait until 1–2 weeks after.
- How many rainy days does Concord get?
- Concord averages about 33 rainy days per year.
- What hardiness zone is Concord?
- Concord's USDA hardiness zone depends on its lowest average winter temperature; the USDA's online lookup tool using the city ZIP code provides the current zone designation.
Climate
Concord, California experiences a hot-summer Mediterranean climate. January temperatures hover near 49°F while July averages 73°F, creating a 24°F seasonal swing.
Throughout the year, Concord receives about 16 inches of precipitation spread over roughly 33 rainy days.
Location shapes Concord's weather patterns through its latitude at 38.0°N, proximity to large water bodies, and elevation. These factors determine what grows here, when frost threatens, and how daily weather unfolds.