Concord, California Weather
August begins in scorching stillness. Day 43 of summer. Read this microseason across nine climate regions →
Concord weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayAug 2Clear——98°62°—
- MondayAug 3Clear——100°64°+2°
- TuesdayAug 4Clear——96°65°-4°
- WednesdayAug 5Clear——95°64°-1°
- ThursdayAug 6Clear——96°64°+1°
- FridayAug 7Clear——99°66°+3°
- SaturdayAug 8Clear——100°66°+1°
AQI 52 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 8.1 µg/m³ (AQI 45) with a 0.84 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in stagnant air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 8.1 µg/m³ (AQI 45) with a 0.84 fine-to-coarse ratio and 2 mph wind — combustion smoke trapped in stagnant air, not road dust.
- PM2.5/PM10
- 0.84
- Wind
- calm
- Recent rain
- 0h in last 6h
- Pattern
- stagnant smoke
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).
Red sky at night, sailor's delight.
- Moonrise
- 9:53 PM
- Moonset
- 10:18 AM
- In sign
- ♓︎ Pisces
August begins in scorching stillness
Concord at a glance
- Today vs. normal: 66°F — typical for the season
- Last frost: April 4 (climatological average for this latitude)
- Microseason: Aug 1–5
- Planting window: Sow fall peas. Start kale and collard seedlings for fall.
ZIP codes: 94518, 94519, 94520, 94521
16-Day Forecast — Concord
- Sun98°62°0%
- Mon100°64°0%
- Tue96°65°0%
- Wed95°64°0%
- Thu96°64°0%
- Fri99°66°0%
- Sat100°66°0%
- Sun94°65°0%
- Mon88°61°0%
- Tue87°61°0%
- Wed87°60°1%
- Thu89°60°3%
- Fri91°62°0%
- Sat85°61°0%
- Sun89°60°3%
- Mon94°61°3%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Concord
Right now in the garden
Peak growing season
As of August 2, 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.
Sun & seasons in Concord
Concord sits in Contra Costa County, where the year’s longest day runs 14h 48m of daylight and its shortest just 9h 32m — a swing of +5h 17m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Los Angeles, the state’s largest city, lies about 334 miles to the SE. The nearest town Concord tracks is Antioch, roughly 11 miles to the E.
Air quality in Concord’s county has held roughly steady since 2020; its cleanest year on record was 2021 (median AQI 47). See the full air-quality history for Concord.
Microseason · August 1–5
August begins in scorching stillness
Calm days dominate early August; temperatures peak; the entire ecosystem is in survival mode.
Day 214 of 365 · Wedge 43 of 72
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
Concord's warmest month is July (~70°F mean) and its coldest is January (~49°F). Rainfall peaks in January (3.5 inches) and bottoms out in July (0.0 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 49° | 3.5″ | 13 |
| February | 51° | 3.3″ | 12 |
| March | 53° | 2.7″ | 13 |
| April | 58° | 1.4″ | 9 |
| May | 64° | 0.5″ | 4 |
| June | 68° | 0.0″ | 1 |
| July | 70° | 0.0″ | 1 |
| August | 70° | 0.0″ | 1 |
| September | 69° | 0.1″ | 1 |
| October | 64° | 0.6″ | 4 |
| November | 55° | 2.2″ | 8 |
| December | 49° | 3.2″ | 12 |
Regional context
In Concord, NOAA NCEI 1991-2020 normals put January near 49°F and July near 70°F — a 22°F seasonal arc — with about 17.5 inches of precipitation over 79 rainy or snowy days.
Precipitation in Concord peaks in the cool season: January averages 3.5 inches across 13.3 storm-fed days, while July bottoms out at 0.0 inches over just 0.9 rainy days. That cool-season-wet pattern aligns Concord with places like Pacheco, CA, Clyde, CA and Pleasant Hill, CA.
Hard freezes are rare in Concord: the coldest month averages 49°F, so Concord's growing window runs most of the year. July is the hottest stretch near 70°F, pushing cool-season crops to the milder shoulder months. Across Concord, elevation and tree cover drive a 4-7°F spread in Concord's overnight lows.
Similar climates: Pacheco, CA, Clyde, CA, Pleasant Hill, CA, Contra Costa Centre, CA, Clayton, 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 lands near mid-April, and in Concord the first fall frost follows around mid-November.
- What is the rainy season in Concord?
- Rainfall in Concord peaks in January near 3.5 inches, out of about 18 inches annually.
- What is the warmest month in Concord?
- July is Concord's warmest month, averaging about 70°F.
- What is the coldest month in Concord?
- Concord bottoms out in January, with a mean near 49°F.
- When can I start a vegetable garden in Concord?
- Frost-hardy sowings begin at mid-April in Concord; warm-season starts follow two weeks on.
- How many rainy days does Concord get?
- Concord records around 79 days of measurable precipitation annually.
- What hardiness zone is Concord?
- Concord sits in the USDA zone set by January lows near 49°F; the USDA ZIP tool gives the band.
- What is the 10-day forecast for Concord?
- Concord's extended outlook — daily high and low temperatures and precipitation chances for each upcoming day — is in the daily forecast above.
- Will it rain this week in Concord?
- See this week's day-by-day rain chances for Concord in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Concord?
- Current conditions for Concord and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Concord forecast updated?
- The Concord forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Concord?
- Today's sunrise and sunset times for Concord are in the Almanac section above, along with civil dawn, civil dusk, and day length. Day length is longest near the summer solstice and shortest near the winter solstice.
- How accurate is the weather forecast for Concord?
- The next few days in Concord's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Climate
Concord, California has a hot-summer Mediterranean climate: January averages roughly 49°F, July about 70°F, 21°F between them.
Across the year, Concord collects about 18 inches of precipitation over roughly 79 days with measurable rain or snow.
Latitude 38.0°N gives Concord its 21°F swing, and with it the rhythm of Concord's growing season.
ZIP codes in Concord
- 94518
- 94519
- 94565
- 94521
- 94520
- 94522
- 94524
- 94527