Stockton, California Weather
Coastal fog thickens at dawn. Day 76 of spring. Read this microseason across nine climate regions →
Stockton weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Overcast——89°57°—
- ThursdayJun 4Clear——91°58°+2°
- FridayJun 5Overcast——100°64°+9°
- SaturdayJun 6Overcast——89°59°-11°
- SundayJun 7Overcast——89°54°0°
- MondayJun 8Overcast——89°60°0°
- TuesdayJun 9Overcast——85°60°-4°
PM2.5/PM10 ratio 0.51 with 7 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 44 now. With UV 9.5 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 56 by mid-afternoon.
- Present
- AQI 44
- UV peak
- 9.5 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 56
PM × Wind × Precip
PM2.5/PM10 ratio 0.51 with 7 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.51
- 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).
The higher the clouds, the finer the weather.
- Moonrise
- 5:53 AM
- Moonset
- 3:16 PM
- In sign
- ♑︎ Capricorn
Coastal fog thickens at dawn
Stockton at a glance
- Today vs. normal: 8°F above the seasonal normal for this latitude
- 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
July brings Stockton's warmest temperatures (~78°F mean) while January delivers the coldest (~49°F). Rainfall reaches its peak in January (3.6 inches) and drops to nearly nothing in July (0.0 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 49° | 3.6″ | 8 |
| February | 53° | 3.1″ | 7 |
| March | 58° | 2.4″ | 6 |
| April | 62° | 1.4″ | 3 |
| May | 69° | 0.6″ | 2 |
| June | 74° | 0.1″ | 0 |
| July | 78° | 0.0″ | 0 |
| August | 77° | 0.0″ | 0 |
| September | 75° | 0.1″ | 0 |
| October | 66° | 1.0″ | 2 |
| November | 56° | 1.8″ | 4 |
| December | 49° | 3.1″ | 7 |
Regional context
Stockton falls within a hot-summer Mediterranean climate region — sharing similar temperature ranges, seasonal patterns, and growing conditions with nearby cities in this climate cohort.
Similar climates: Los Angeles, CA, San Francisco, CA, San Diego, CA, Riverside, CA, Sacramento, CA.
Naturalist notes
Valley oaks begin dropping their acorns in late May as temperatures climb steadily toward summer.
Red-winged blackbirds establish territories in the marshes and waterways during late spring courtship season.
Frequently asked
- When does it freeze in Stockton?
- Stockton's last spring frost typically occurs around mid-April, and the first fall frost arrives around mid-November.
- What is the rainy season in Stockton?
- January stands as the wettest month with about 3.6 inches of rain on average; the city receives roughly 17 inches annually.
- What is the warmest month in Stockton?
- July typically brings the warmest weather, averaging about 78°F.
- What is the coldest month in Stockton?
- January typically delivers the coldest temperatures, averaging about 49°F.
- When can I start a vegetable garden in Stockton?
- Cool-season crops (peas, lettuce) can be planted around the last spring frost (mid-April); warm-season crops (tomatoes, peppers) should wait until 1–2 weeks after.
- How many rainy days does Stockton get?
- Stockton experiences about 39 rainy days per year on average.
- What hardiness zone is Stockton?
- Stockton'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
Stockton, California experiences a hot-summer Mediterranean climate zone. January temperatures hover near 49°F while July averages 78°F — creating a 29°F seasonal swing.
Throughout the year, Stockton receives about 17 inches of precipitation spread over roughly 39 rainy days.
Latitude (38.0°N), proximity to large water bodies, and elevation determine the rhythm of the year — shaping what grows here, when frost is likely, and what the weather story looks like day to day.