Chester, California Weather
Summer heat deepens across the valleys. Day 15 of summer. Read this microseason across nine climate regions →
Chester weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——84°58°—
- MondayJul 6Overcast——84°57°0°
- TuesdayJul 7Clear——86°54°+2°
- WednesdayJul 8Clear——87°55°+1°
- ThursdayJul 9Clear——88°58°+1°
- FridayJul 10Overcast——91°59°+3°
- SaturdayJul 11Overcast——94°61°+3°
AQI 42 (Good), driven by Ozone. Ozone at AQI 60. Overcast through the UV peak window (cloud cover ~98%) — 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 ~98%) — afternoon ozone should stay flat.
- Present
- AQI 60
- UV peak
- 7.8 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 31
PM × Wind × Precip
PM2.5 at 5.7 µg/m³, PM10 at 11.0 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.52
- 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
- 11:25 PM
- Moonset
- 11:22 AM
- In sign
- ♓︎ Pisces
Summer heat deepens across the valleys
Chester at a glance
- Today vs. normal: 8°F above the seasonal normal for this latitude
- Last frost: April 18 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 96020
16-Day Forecast — Chester
- Sun84°58°1%
- Mon84°57°2%
- Tue86°54°0%
- Wed87°55°0%
- Thu88°58°0%
- Fri91°59°0%
- Sat94°61°0%
- Sun87°59°1%
- Mon87°58°3%
- Tue91°60°3%
- Wed90°61°3%
- Thu91°60°2%
- Fri91°63°6%
- Sat93°62°6%
- Sun88°63°10%
- Mon89°58°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 Chester
- 96020