Palo Alto, California Weather
Summer heat deepens across the valleys. Day 15 of summer. Read this microseason across nine climate regions →
Palo Alto weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——80°57°—
- MondayJul 6Foggy——76°54°-4°
- TuesdayJul 7Overcast——79°53°+3°
- WednesdayJul 8Clear——83°55°+4°
- ThursdayJul 9Clear——84°57°+1°
- FridayJul 10Overcast——86°57°+2°
- SaturdayJul 11Overcast——93°63°+7°
AQI 32 (Good), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 8.6 µg/m³ (AQI 48) with a 0.68 fine-to-coarse ratio and 6 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
Ozone × UV × Sky
Ozone at AQI 32 now. With UV 8.5 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 36 around 1 PM.
- Present
- AQI 32
- UV peak
- 8.5 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 36
PM × Wind × Precip
PM2.5 at 8.6 µg/m³ (AQI 48) with a 0.68 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.68
- 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).
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
Palo Alto at a glance
- Today vs. normal: 10°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 codes: 94301, 94303, 94304, 94306
16-Day Forecast — Palo Alto
- Sun80°57°0%
- Mon76°54°0%
- Tue79°53°1%
- Wed83°55°1%
- Thu84°57°0%
- Fri86°57°0%
- Sat93°63°1%
- Sun83°67°1%
- Mon91°66°2%
- Tue92°64°5%
- Wed91°62°1%
- Thu91°62°3%
- Fri95°68°0%
- Sat90°65°0%
- Sun87°62°3%
- Mon87°60°3%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Palo Alto
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 Palo Alto
- 94028
- 94022
- 94303
- 94301
- 94306
- 94304
- 94302