Carson, California Weather
Coastal fog thickens at dawn. Day 76 of spring. Read this microseason across nine climate regions →
Carson weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 3Foggy——77°61°—
- ThursdayJun 4Foggy——76°58°-1°
- FridayJun 5Foggy——75°60°-1°
- SaturdayJun 6Overcast——73°63°-2°
- SundayJun 7Mostly Clear——73°62°0°
- MondayJun 8Overcast——75°63°+2°
- TuesdayJun 9Partly Cloudy——79°65°+4°
PM2.5 at 27.1 µg/m³ (AQI 85) with a 0.72 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust. 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 9.9 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 58 by mid-afternoon.
- Present
- AQI 44
- UV peak
- 9.9 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 58
PM × Wind × Precip
PM2.5 at 27.1 µg/m³ (AQI 85) with a 0.72 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.72
- Wind
- light
- 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).
The higher the clouds, the finer the weather.
- Moonrise
- 5:27 AM
- Moonset
- 3:16 PM
- In sign
- ♑︎ Capricorn
Coastal fog thickens at dawn
Carson at a glance
- Today vs. normal: 5°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 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
Carson's warmest month is August (~74°F mean) and its coldest is December (~57°F). Rainfall peaks in February (3.0 inches) and bottoms out in August (0.0 inches).
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 57° | 2.9″ | 4 |
| February | 58° | 3.0″ | 5 |
| March | 60° | 1.6″ | 3 |
| April | 63° | 0.6″ | 1 |
| May | 66° | 0.3″ | 1 |
| June | 69° | 0.1″ | 0 |
| July | 73° | 0.1″ | 0 |
| August | 74° | 0.0″ | 0 |
| September | 73° | 0.1″ | 0 |
| October | 68° | 0.5″ | 1 |
| November | 62° | 0.8″ | 2 |
| December | 57° | 2.1″ | 3 |
Regional context
Carson belongs to a hot-summer Mediterranean climate region — a group of cities sharing 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 late May, fledgling western scrub-jays begin testing their wings in suburban yards, noisily chasing parents for insects and cached acorns.
Low in the southwestern sky after sunset, Venus reaches its greatest eastern elongation in early June, hanging bright and unmistakable through the late-spring twilight.
Frequently asked
- When does it freeze in Carson?
- Carson's last spring frost typically falls around mid-March, and the first fall frost arrives around mid-December.
- What is the rainy season in Carson?
- February is the wettest month with about 3.0 inches of rain on average; the city receives roughly 12 inches annually.
- What is the warmest month in Carson?
- August is typically warmest, averaging about 74°F.
- What is the coldest month in Carson?
- December is typically coldest, averaging about 57°F.
- When can I start a vegetable garden in Carson?
- Cool-season crops (peas, lettuce) can be sown around the last spring frost (mid-March); warm-season crops (tomatoes, peppers) wait until 1–2 weeks after.
- How many rainy days does Carson get?
- Carson averages about 20 rainy days per year.
- What hardiness zone is Carson?
- Carson's USDA hardiness zone is determined by its lowest average winter temperature; check the USDA's online lookup with the city ZIP for the current zone designation.
Climate
Carson, California lies in a hot-summer Mediterranean climate zone. January means hover near 57°F, while July averages 73°F — a 16°F seasonal swing.
The city receives roughly 12 inches of precipitation across the year, spread over about 20 rainy days.
Latitude (33.8°N), nearby water bodies, and local elevation set the rhythm of the year. These factors determine what grows here, when frost is likely, and the day-to-day weather story.