Napa, California Weather
Summer heat deepens across the valleys. Day 15 of summer. Read this microseason across nine climate regions →
Napa weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Foggy——74°54°—
- MondayJul 6Overcast——74°53°0°
- TuesdayJul 7Overcast——78°53°+4°
- WednesdayJul 8Clear——79°50°+1°
- ThursdayJul 9Overcast——84°53°+5°
- FridayJul 10Overcast——83°54°-1°
- SaturdayJul 11Overcast——84°54°+1°
AQI 28 (Good), driven by Ozone. 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
PM × Wind × Precip
PM2.5 at 4.8 µg/m³, PM10 at 6.6 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.73
- Wind
- breezy
- Recent rain
- 0h in last 6h
- Pattern
- background
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
- 11:28 PM
- Moonset
- 11:28 AM
- In sign
- ♓︎ Pisces
Summer heat deepens across the valleys
Napa at a glance
- Today vs. normal: 4°F below the seasonal normal for this latitude
- Last frost: April 6 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP codes: 94558, 94559
16-Day Forecast — Napa
- Sun74°54°1%
- Mon74°53°2%
- Tue78°53°3%
- Wed79°50°0%
- Thu84°53°0%
- Fri83°54°0%
- Sat84°54°0%
- Sun77°60°0%
- Mon98°65°2%
- Tue95°58°5%
- Wed91°56°1%
- Thu91°55°1%
- Fri93°56°0%
- Sat88°54°3%
- Sun89°56°3%
- Mon87°53°0%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Napa
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 Napa
- 94559
- 94558
- 94581