Arden-Arcade, California Weather
Coastal fog thickens at dawn. Day 77 of spring. Read this microseason across nine climate regions →
Arden-Arcade weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Mostly Clear——96°59°—
- FridayJun 5Overcast——99°63°+3°
- SaturdayJun 6Overcast——86°60°-13°
- SundayJun 7Overcast——84°55°-2°
- MondayJun 8Rain18%0.50″61°57°-23°
- TuesdayJun 9Heavy Drizzle21%0.04″72°58°+11°
- WednesdayJun 10Clear——84°60°+12°
PM2.5 at 7.0 µg/m³ (AQI 39) with a 0.78 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust. AQI down 9 over the last 6 hours (steady decline since this morning).
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 33 now. With UV 9.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 40 by mid-afternoon.
- Present
- AQI 33
- UV peak
- 9.0 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 40
PM × Wind × Precip
PM2.5 at 7.0 µg/m³ (AQI 39) with a 0.78 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.78
- 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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 6:33 AM
- Moonset
- 4:17 PM
- In sign
- ♒︎ Aquarius
Coastal fog thickens at dawn
Arden-Arcade at a glance
- Today vs. normal: 8°F above the seasonal normal for this latitude
- Last frost: April 8 (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 | — | — |
| 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 registers as Arden-Arcade's warmest month, with a mean near 78°F, while December is the coldest at about 49°F. January brings the rainfall peak (3.9 inches), and July commonly records 0.0 inches.
| Month | Mean temp | Precip | Rainy days |
|---|---|---|---|
| January | 49° | 3.9″ | 7 |
| February | 53° | 3.6″ | 7 |
| March | 57° | 2.8″ | 6 |
| April | 61° | 1.4″ | 3 |
| May | 68° | 0.9″ | 2 |
| June | 74° | 0.2″ | 1 |
| July | 78° | 0.0″ | 0 |
| August | 77° | 0.0″ | 0 |
| September | 74° | 0.1″ | 0 |
| October | 66° | 0.9″ | 2 |
| November | 55° | 1.8″ | 4 |
| December | 49° | 3.5″ | 6 |
Regional context
Arden-Arcade belongs to a hot-summer Mediterranean climate region, a cohort of nearby cities that share comparable temperature ranges, seasonal rhythms, and growing conditions.
Similar climates: Los Angeles, CA, San Francisco, CA, San Diego, CA, Riverside, CA, Sacramento, CA.
Naturalist notes
By mid-May, valley carpenter bees are patrolling garden blossoms and defending aerial territories across the region's oak-studded lots.
Shortly after the June solstice, the constellation Scorpius rises fully above the southeastern horizon after twilight, with Antares burning orange-red through the dry summer air.
Frequently asked
- When does it freeze in Arden-Arcade?
- Arden-Arcade's last spring frost typically arrives around mid-April, and the first fall frost around mid-November.
- What is the rainy season in Arden-Arcade?
- January is the wettest month, averaging about 3.9 inches of rain; the city receives roughly 19 inches annually.
- What is the warmest month in Arden-Arcade?
- July is typically the warmest month, averaging about 78°F.
- What is the coldest month in Arden-Arcade?
- December is typically the coldest month, averaging about 49°F.
- When can I start a vegetable garden in Arden-Arcade?
- Cool-season crops such as peas and lettuce can be sown around the last spring frost in mid-April; warm-season crops like tomatoes and peppers should wait until 1–2 weeks after.
- How many rainy days does Arden-Arcade get?
- Arden-Arcade averages about 38 rainy days per year.
- What hardiness zone is Arden-Arcade?
- Arden-Arcade's USDA hardiness zone is based on the lowest average winter temperature; the current zone designation can be found through the USDA's online lookup using the city ZIP.
Climate
Arden-Arcade, California lies within a hot-summer Mediterranean climate zone. Mean temperatures shift from roughly 49°F in January to 78°F in July — a seasonal swing of 29°F.
Over the course of a year, the area collects about 19 inches of precipitation across roughly 38 rainy days.
Latitude (38.6°N), proximity to large water bodies, and elevation set the annual rhythm here. Those three factors determine what plants succeed, when frost is likely, and how the day-to-day weather narrative unfolds.