Plymouth, California Weather
Summer heat deepens across the valleys. Day 15 of summer. Read this microseason across nine climate regions →
Plymouth weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——88°62°—
- MondayJul 6Overcast——87°58°-1°
- TuesdayJul 7Overcast——92°56°+5°
- WednesdayJul 8Clear——95°58°+3°
- ThursdayJul 9Partly Cloudy——99°63°+4°
- FridayJul 10Overcast——103°65°+4°
- SaturdayJul 11Overcast——106°70°+3°
AQI 27 (Good), driven by PM2.5. AQI down 5 over the last 6 hours (gradual decline). PM2.5 at 8.6 µg/m³, PM10 at 12.1 µg/m³ — typical background levels with no transport signature.
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 38. Overcast through the UV peak window (cloud cover ~80%) — afternoon ozone should stay flat.
- Present
- AQI 38
- UV peak
- 7.5 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 19
PM × Wind × Precip
PM2.5 at 8.6 µg/m³, PM10 at 12.1 µg/m³ — typical background levels with no transport signature.
- PM2.5/PM10
- 0.71
- Wind
- light
- 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
- 11:23 PM
- Moonset
- 11:21 AM
- In sign
- ♓︎ Pisces
Summer heat deepens across the valleys
Plymouth at a glance
- Today vs. normal: 3°F above the seasonal normal for this latitude
- Last frost: April 7 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 95669
16-Day Forecast — Plymouth
- Sun88°62°2%
- Mon87°58°1%
- Tue92°56°0%
- Wed95°58°0%
- Thu99°63°0%
- Fri103°65°0%
- Sat106°70°0%
- Sun91°73°1%
- Mon99°67°3%
- Tue106°70°4%
- Wed106°71°3%
- Thu107°72°5%
- Fri109°77°10%
- Sat106°74°10%
- Sun102°72°13%
- Mon102°69°6%
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 Plymouth
- 95669