Garden Grove, California Weather
Coastal fog thickens at dawn. Day 77 of spring. Read this microseason across nine climate regions →
Garden Grove weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Overcast——76°62°—
- FridayJun 5Overcast——74°59°-2°
- SaturdayJun 6Overcast——73°64°-1°
- SundayJun 7Clear——72°62°-1°
- MondayJun 8Clear——74°63°+2°
- TuesdayJun 9Clear——75°63°+1°
- WednesdayJun 10Overcast——73°63°-2°
PM2.5/PM10 ratio 0.58 with 5 mph wind — characteristic of long-range haze transport rather than a local source. 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 35 now. With UV 3.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 16 by mid-afternoon.
- Present
- AQI 35
- UV peak
- 3.3 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 16
PM × Wind × Precip
PM2.5/PM10 ratio 0.58 with 5 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.58
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- transport
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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 6:05 AM
- Moonset
- 4:16 PM
- In sign
- ♑︎ Capricorn
Coastal fog thickens at dawn
Garden Grove at a glance
- Today vs. normal: 18°F below the seasonal normal for this latitude
- Last frost: March 10 (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 4, 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 | lettuce, peas, spinach, radishes | — |
| April | lettuce, peas, spinach, radishes, tomatoes, peppers, beans, squash | — |
| May | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| June | tomatoes, peppers, beans, squash | lettuce, peas, radishes |
| July | — | tomatoes, beans, summer squash |
| August | — | tomatoes, beans, summer squash |
| September | — | tomatoes, beans, summer squash |
| October | fall brassicas, garlic (overwinter), carrots | winter squash, tomatoes (last) |
| November | fall brassicas, garlic (overwinter), carrots | — |
| December | — | — |
A year in weather
August brings Garden Grove's warmest temperatures (~75°F mean) while December delivers the coldest (~58°F). Rainfall reaches its peak in February (3.2 inches) and drops to its lowest point in August (0.0 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 59° | 2.9″ | 5 |
| February | 59° | 3.2″ | 5 |
| March | 62° | 1.7″ | 3 |
| April | 64° | 0.8″ | 2 |
| May | 66° | 0.3″ | 1 |
| June | 70° | 0.1″ | 0 |
| July | 74° | 0.0″ | 0 |
| August | 75° | 0.0″ | 0 |
| September | 74° | 0.1″ | 0 |
| October | 69° | 0.5″ | 1 |
| November | 63° | 0.8″ | 2 |
| December | 58° | 2.2″ | 4 |
Regional context
Garden Grove belongs to a hot-summer Mediterranean climate region — sharing similar 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 peak blooming period for California poppies across local hillsides and open spaces.
House finches begin their second nesting cycle in early June as temperatures stabilize.
Frequently asked
- When does it freeze in Garden Grove?
- Garden Grove's last spring frost typically occurs around mid-March, and the first fall frost arrives around mid-December.
- What is the rainy season in Garden Grove?
- February receives the most rainfall with about 3.2 inches on average; the city gets roughly 13 inches annually.
- What is the warmest month in Garden Grove?
- August typically brings the warmest temperatures, averaging about 75°F.
- What is the coldest month in Garden Grove?
- December typically brings the coldest temperatures, averaging about 58°F.
- When can I start a vegetable garden in Garden Grove?
- Cool-season crops (peas, lettuce) can be planted around the last spring frost (mid-March); warm-season crops (tomatoes, peppers) should wait until 1–2 weeks after.
- How many rainy days does Garden Grove get?
- Garden Grove gets about 22 rainy days per year on average.
- What hardiness zone is Garden Grove?
- Garden Grove's USDA hardiness zone depends on its lowest average winter temperature; check the USDA's online lookup with the city ZIP for the current zone designation.
Climate
Garden Grove, California experiences a hot-summer Mediterranean climate zone. January temperatures hover near 59°F while July averages 74°F — a 15°F seasonal swing.
Throughout the year, Garden Grove receives about 13 inches of precipitation spread over roughly 22 rainy days.
Latitude (33.8°N), proximity to large water bodies, and elevation establish the rhythm of the year — shaping what grows here, when frost is likely, and what the daily weather patterns look like.