Alto, California Weather
Coastal fog thickens at dawn. Day 77 of spring. Read this microseason across nine climate regions →
Alto weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 4Mostly Clear——89°51°—
- FridayJun 5Clear——91°54°+2°
- SaturdayJun 6Overcast——72°52°-19°
- SundayJun 7Overcast——68°48°-4°
- MondayJun 8Light Drizzle14%0.08″66°53°-2°
- TuesdayJun 9Light Drizzle—0.07″67°52°+1°
- WednesdayJun 10Clear——67°49°0°
AQI 21 (Good), driven by PM2.5. AQI down 6 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 during the projected peak around 10 AM.
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
- 6:36 AM
- Moonset
- 4:24 PM
- In sign
- ♑︎ Capricorn
Coastal fog thickens at dawn
Alto at a glance
- Today vs. normal: 20°F below the seasonal normal for this latitude
- Last frost: April 3 (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.