Arnold, California Weather
Summer heat deepens across the valleys. Day 15 of summer. Read this microseason across nine climate regions →
Arnold weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast13%—76°61°—
- MondayJul 6Overcast——80°61°+4°
- TuesdayJul 7Clear——84°60°+4°
- WednesdayJul 8Clear——87°60°+3°
- ThursdayJul 9Clear——89°61°+2°
- FridayJul 10Overcast——92°63°+3°
- SaturdayJul 11Overcast——93°66°+1°
AQI 32 (Good), driven by Ozone. Ozone at AQI 60. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
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 60. Overcast through the UV peak window (cloud cover ~100%) — afternoon ozone should stay flat.
- Present
- AQI 60
- UV peak
- 8.2 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 33
PM × Wind × Precip
PM2.5 at 6.3 µg/m³, PM10 at 10.8 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.58
- Wind
- calm
- 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
- 11:20 PM
- Moonset
- 11:19 AM
- In sign
- ♓︎ Pisces
Summer heat deepens across the valleys
Arnold at a glance
- Today vs. normal: 74°F — typical for the season
- Last frost: April 5 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 95223
16-Day Forecast — Arnold
- Sun76°61°13%
- Mon80°61°1%
- Tue84°60°0%
- Wed87°60°0%
- Thu89°61°0%
- Fri92°63°0%
- Sat93°66°0%
- Sun94°67°1%
- Mon99°73°5%
- Tue97°73°4%
- Wed88°66°3%
- Thu88°64°3%
- Fri95°64°6%
- Sat101°71°10%
- Sun101°75°11%
- Mon95°71°10%
Forecast data from Open-Meteo (CC BY 4.0).
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 Arnold
- 95223