Garden Grove, California Weather
Ceanothus blooms again. Day 93 of summer. Read this microseason across nine climate regions →
Garden Grove weather forecast — hour by hour, 7-day outlook, NOAA radar
Conditions updated 1:20 AM PDT · Open-Meteo
- TodaySep 21Light Drizzle later——78°67°—
- TuesdaySep 22Partly Cloudy——77°64°-1°
- WednesdaySep 23Clear——79°69°+2°
- ThursdaySep 24Clear——81°70°+2°
- FridaySep 25Overcast——86°72°+5°
- SaturdaySep 26Overcast——86°73°0°
- SundaySep 27Overcast——88°76°+2°
Air quality now AQI 51 · Moderate
AQI 51 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 9.6 µg/m³ (AQI 52) with a 0.70 fine-to-coarse ratio and 3 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
Ozone × UV × Sky
Ozone at AQI 37 now. With UV 3.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 16.
- Present
- AQI 37
- UV peak
- 3.3 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 16
PM × Wind × Precip
PM2.5 at 9.6 µg/m³ (AQI 52) with a 0.70 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in stagnant air, not road dust.
- PM2.5/PM10
- 0.70
- 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).
September dries up ditches or breaks down bridges.
- Moonrise
- 4:10 PM
- Moonset
- 1:36 AM
- In sign
- ♑︎ Capricorn
Ceanothus blooms again
Read this microseason across nine climate regions →
All 72 microseasons on the year wheel →
Garden Grove at a glance
- Today vs. normal: Today averages 73°F (high 78°F, low 67°F), 2°F above the 71°F normal for Sep 21
- Last frost: None in most years — 32°F in 3% of 1991–2020 years (NOAA station 9 km away)
- Microseason: Sep 21–25
- Planting calendar: September — plant lettuce, peas, spinach, radishes, beans, squash; harvest lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash
15-Day Forecast — Garden Grove
- Mon78°67°1%
- Tue77°64°0%
- Wed79°69°0%
- Thu81°70°1%
- Fri86°72°0%
- Sat86°73°0%
- Sun88°76°3%
- Mon93°76°7%
- Tue91°80°11%
- Wed92°74°12%
- Thu75°71°3%
- Fri85°73°6%
- Sat86°76°7%
- Sun91°77°5%
- Mon83°80°3%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Garden Grove
Interactive wind and temperature map centered on Garden Grove — it loads in your browser. Open the full weather map.
Right now in the garden
Year-round growing
As of September 21, sowing here runs through the year. Freezes are uncommon, so there is no frost date to plan around; heat and rainfall set the calendar instead. This city's planting calendar for September: plant lettuce, peas, spinach, radishes, beans, and squash; harvest lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, and winter squash.
Sun & seasons in Garden Grove
Garden Grove sits in Orange County, where the year’s longest day runs 14h 24m of daylight and its shortest just 9h 54m — a swing of +4h 30m 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 35 miles to the NW. The nearest town Garden Grove tracks is Santa Ana, roughly 5 miles to the ESE.
Air quality in Garden Grove
Air quality in Garden Grove’s county has held roughly steady since 2020; its cleanest year on record was 2023 (median AQI 52). See the full air-quality history for Garden Grove.
Planting calendar
| Month | Plant | Harvest |
|---|---|---|
| January | lettuce, peas, spinach, radishes | lettuce, peas, spinach, radishes |
| February | lettuce, peas, spinach, radishes | lettuce, peas, spinach, radishes |
| March | lettuce, peas, spinach, radishes | lettuce, peas, spinach, radishes |
| April | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes |
| May | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, summer squash |
| June | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash |
| July | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| August | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| September | lettuce, peas, spinach, radishes, beans, squash | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| October | lettuce, peas, spinach, radishes | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| November | lettuce, peas, spinach, radishes | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, summer squash, winter squash |
| December | lettuce, peas, spinach, radishes | lettuce, peas, spinach, radishes |
A year in weather
Garden Grove's warmest month is August (~73°F mean) and its coldest is January (~54°F). Rainfall peaks in February (2.5 inches) and bottoms out in August (0.0 inches).
| Month | Mean temp | Precip |
|---|---|---|
| January | 54° | 2.3″ |
| February | 56° | 2.5″ |
| March | 58° | 2.0″ |
| April | 61° | 0.9″ |
| May | 64° | 0.3″ |
| June | 68° | 0.0″ |
| July | 72° | 0.1″ |
| August | 73° | 0.0″ |
| September | 72° | 0.0″ |
| October | 68° | 0.3″ |
| November | 60° | 1.1″ |
| December | 54° | 1.8″ |
Regional context
Similar climates Stanton, CA, Westminster, CA, Midway City, CA
Garden Grove swings from 54°F in January to 72°F in July (18°F) per modelled 1991-2020 normals (EC_Earth3P_HR model via Open-Meteo); precipitation in Garden Grove runs about 11.3 inches.
Precipitation in Garden Grove peaks in the cool season: February averages 2.5 inches, while August bottoms out at 0.0 inches. It is a winter-storm rhythm Garden Grove shares with places like Stanton, CA, Westminster, CA and Midway City, CA.
Hard freezes are rare in Garden Grove: the coldest month averages 54°F, so Garden Grove's growing window runs most of the year. August is the hottest stretch near 73°F, pushing cool-season crops to the milder shoulder months. Garden Grove's rare cold nights chill open ground first.
Similar climates: Stanton, CA, Westminster, CA, Midway City, CA, Fountain Valley, CA, Cypress, CA.
Frequently asked
- When does it freeze in Garden Grove?
- A freeze is the exception in Garden Grove: the nearest NOAA station hit 32°F in 3% of 1991–2020 years, too few for a frost date in Garden Grove.
- What is the rainy season in Garden Grove?
- Garden Grove sees its heaviest rain in February (around 2.5 inches), part of roughly 11 inches a year.
- What is the warmest month in Garden Grove?
- The warmest stretch in Garden Grove comes in August, around 73°F on average.
- What is the coldest month in Garden Grove?
- On average January is the chilliest month in Garden Grove, about 54°F.
- When can I start a vegetable garden in Garden Grove?
- Garden Grove has no frost date to wait for, so sowing runs year-round; lettuce and greens do best when Garden Grove's coldest month settles near 54°F.
- What hardiness zone is Garden Grove?
- Garden Grove sits in the USDA zone set by January lows near 54°F; the USDA ZIP tool gives the band.
- What is the 10-day forecast for Garden Grove?
- Garden Grove'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 Garden Grove?
- See this week's day-by-day rain chances for Garden Grove in the daily forecast above, and the next 24 hours in the hourly chart.
- What is the weather like right now in Garden Grove?
- Current conditions for Garden Grove and the next 24 hours — temperature, precipitation chance, and wind by the hour — are in the hourly forecast chart above.
- How often is the Garden Grove forecast updated?
- The Garden Grove forecast on this page is built from Open-Meteo weather-model data and refreshes regularly through the day.
- When are sunrise and sunset in Garden Grove?
- Today's sunrise and sunset times for Garden Grove 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 Garden Grove?
- The next few days in Garden Grove's forecast are the most reliable; accuracy declines beyond about a week as weather-model uncertainty grows.
Garden Grove sits at 33.8°N; its climate zone is hot-summer Mediterranean (Köppen approximation).
ZIP codes in Garden Grove
- 92840
- 92841
- 92842
- 92843
- 92844
- 92845
- 92846