San Buenaventura, California Weather
Coastal fog thickens at dawn. Day 76 of spring. Read this microseason across nine climate regions →
San Buenaventura weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Overcast——67°57°—
- ThursdayJun 4Foggy——71°57°+4°
- FridayJun 5Foggy——77°56°+6°
- SaturdayJun 6Overcast——71°61°-6°
- SundayJun 7Partly Cloudy——71°60°0°
- MondayJun 8Overcast——72°60°+1°
- TuesdayJun 9Partly Cloudy——74°62°+2°
PM2.5/PM10 ratio 0.58 with 10 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 56 — peak already passed at 1 PM under overcast skies. Levels should ease through evening.
- Present
- AQI 56
- UV peak
- 6.9 at earlier today
- Sky at peak
- overcast
- Projected peak
- AQI 56
PM × Wind × Precip
PM2.5/PM10 ratio 0.58 with 10 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.58
- Wind
- breezy
- 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
- 5:32 AM
- Moonset
- 3:19 PM
- In sign
- ♑︎ Capricorn
Coastal fog thickens at dawn
San Buenaventura at a glance
- Today vs. normal: 15°F below the seasonal normal for this latitude
- Last frost: March 13 (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 | 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
San Buenaventura's warmest month is August, with a mean temperature near 67°F, and its coldest is January at about 56°F. Rainfall peaks in February with 3.3 inches and drops to a low of 0.0 inches in August.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 56° | 2.9″ | 4 |
| February | 57° | 3.3″ | 4 |
| March | 57° | 2.3″ | 3 |
| April | 59° | 0.7″ | 2 |
| May | 61° | 0.3″ | 1 |
| June | 64° | 0.1″ | 0 |
| July | 67° | 0.0″ | 0 |
| August | 67° | 0.0″ | 0 |
| September | 67° | 0.1″ | 0 |
| October | 65° | 0.5″ | 1 |
| November | 60° | 0.7″ | 2 |
| December | 56° | 2.1″ | 3 |
Regional context
San Buenaventura belongs to the hot-summer Mediterranean climate region — a group of cities that share similar temperature ranges, seasonal patterns, and growing conditions.
Similar climates: Los Angeles, CA, San Francisco, CA, San Diego, CA, Riverside, CA, Sacramento, CA.
Naturalist notes
By mid-May, scrub jays are gathering nest material and ferrying it into the oaks; their squabbling over territory grows louder in the warming mornings.
A late-May evening sky near 34°N stays light past 8 p.m., and Antares makes a low, ruddy appearance just above the southern horizon after dusk.
Frequently asked
- When does it freeze in San Buenaventura?
- The last spring frost in San Buenaventura generally occurs around mid-March; the first fall frost typically arrives around mid-December.
- What is the rainy season in San Buenaventura?
- February is the wettest month, averaging roughly 3.3 inches of rain. The city receives about 13 inches annually.
- What is the warmest month in San Buenaventura?
- August is usually the warmest month, averaging about 67°F.
- What is the coldest month in San Buenaventura?
- January is typically the coldest month, averaging around 56°F.
- When can I start a vegetable garden in San Buenaventura?
- Cool-season crops such as peas and lettuce can be sown around the last spring frost in mid-March. Warm-season crops like tomatoes and peppers should wait until one to two weeks after that date.
- How many rainy days does San Buenaventura get?
- San Buenaventura averages about 19 rainy days per year.
- What hardiness zone is San Buenaventura?
- San Buenaventura's USDA hardiness zone reflects its lowest average winter temperature; the current zone can be found by searching the city's ZIP code in the USDA's online look-up tool.
Climate
San Buenaventura, California has a hot-summer Mediterranean climate. Average January temperatures sit near 56°F, while July comes in around 67°F, yielding a seasonal swing of just 11°F.
Precipitation totals roughly 13 inches over the course of the year, spread across about 19 rainy days.
Latitude (34.3°N), proximity to large bodies of water, and local elevation set the seasonal rhythm. Those factors influence what can grow, when frost is likely, and how the daily weather story unfolds.