Jamestown, California Weather
Summer heat deepens across the valleys. Day 15 of summer. Read this microseason across nine climate regions →
Jamestown weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Light Drizzle14%—88°67°—
- MondayJul 6Overcast——90°66°+2°
- TuesdayJul 7Clear——93°63°+3°
- WednesdayJul 8Clear——96°63°+3°
- ThursdayJul 9Clear——99°66°+3°
- FridayJul 10Partly Cloudy——102°69°+3°
- SaturdayJul 11Overcast——105°72°+3°
AQI 29 (Good), driven by Ozone. Ozone at AQI 51. Overcast through the UV peak window (cloud cover ~93%) — 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 51. Overcast through the UV peak window (cloud cover ~93%) — afternoon ozone should stay flat.
- Present
- AQI 51
- UV peak
- 8.5 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 29
PM × Wind × Precip
PM2.5 at 7.3 µg/m³ (AQI 41) with a 0.65 fine-to-coarse ratio and 6 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.65
- 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
- 11:20 PM
- Moonset
- 11:20 AM
- In sign
- ♓︎ Pisces
Summer heat deepens across the valleys
Jamestown at a glance
- Today vs. normal: 8°F above the seasonal normal for this latitude
- Last frost: April 4 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 95327
16-Day Forecast — Jamestown
- Sun88°67°14%
- Mon90°66°0%
- Tue93°63°0%
- Wed96°63°0%
- Thu99°66°0%
- Fri102°69°0%
- Sat105°72°0%
- Sun94°72°1%
- Mon98°67°5%
- Tue104°71°6%
- Wed105°73°3%
- Thu106°74°1%
- Fri109°76°13%
- Sat106°75°12%
- Sun103°72°5%
- Mon102°70°3%
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 Jamestown
- 95370
- 95327