Cupertino, California Weather
Summer heat deepens across the valleys. Day 15 of summer. Read this microseason across nine climate regions →
Cupertino weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Foggy——78°56°—
- MondayJul 6Overcast——75°54°-3°
- TuesdayJul 7Overcast——82°54°+7°
- WednesdayJul 8Clear——88°55°+6°
- ThursdayJul 9Clear——88°60°0°
- FridayJul 10Partly Cloudy——92°59°+4°
- SaturdayJul 11Overcast——94°63°+2°
AQI 32 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 7.5 µg/m³ (AQI 42) with a 0.70 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion.
What's driving it
PM × Wind × Precip
PM2.5 at 7.5 µg/m³ (AQI 42) with a 0.70 fine-to-coarse ratio and 4 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.70
- Wind
- calm
- 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).
If the first of July be rainy weather, 'twill rain more or less for four weeks together.
- Moonrise
- 11:27 PM
- Moonset
- 11:27 AM
- In sign
- ♓︎ Pisces
Summer heat deepens across the valleys
Cupertino at a glance
- Today vs. normal: 7°F below the seasonal normal for this latitude
- Last frost: March 31 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 95014
16-Day Forecast — Cupertino
- Sun78°56°0%
- Mon75°54°0%
- Tue82°54°0%
- Wed88°55°0%
- Thu88°60°0%
- Fri92°59°0%
- Sat94°63°1%
- Sun96°66°1%
- Mon100°74°3%
- Tue105°73°4%
- Wed89°67°1%
- Thu96°71°3%
- Fri103°75°0%
- Sat105°77°0%
- Sun107°77°3%
- Mon95°69°3%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Cupertino
Right now in the garden
Peak growing season
As of July 5, 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.
ZIP codes in Cupertino
- 95014
- 95015
- 95108
- 95170