Porterville, California Weather
Summer heat deepens across the valleys. Day 15 of summer. Read this microseason across nine climate regions →
Porterville weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——95°74°—
- MondayJul 6Overcast——96°70°+1°
- TuesdayJul 7Clear——104°59°+8°
- WednesdayJul 8Clear——106°60°+2°
- ThursdayJul 9Clear——109°62°+3°
- FridayJul 10Clear——112°64°+3°
- SaturdayJul 11Overcast——114°70°+2°
AQI 63 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 13.3 µg/m³ (AQI 59), ratio 0.41 with 6 mph wind — characteristic of long-range haze transport rather than a local source.
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 30 now. With UV 10 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 40 around 1 PM.
- Present
- AQI 30
- UV peak
- 10.0 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 40
PM × Wind × Precip
PM2.5 at 13.3 µg/m³ (AQI 59), ratio 0.41 with 6 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.41
- Wind
- light
- Recent rain
- 0h in last 6h
- Pattern
- transport
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
- 11:13 PM
- Moonset
- 11:14 AM
- In sign
- ♓︎ Pisces
Summer heat deepens across the valleys
Porterville at a glance
- Today vs. normal: 11°F above the seasonal normal for this latitude
- Last frost: March 23 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP codes: 93257, 93258
16-Day Forecast — Porterville
- Sun95°74°2%
- Mon96°70°0%
- Tue104°59°0%
- Wed106°60°0%
- Thu109°62°0%
- Fri112°64°0%
- Sat114°70°1%
- Sun96°72°1%
- Mon105°65°4%
- Tue110°74°6%
- Wed113°78°1%
- Thu113°73°13%
- Fri117°74°13%
- Sat110°75°10%
- Sun113°76°16%
- Mon112°69°13%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Porterville
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 Porterville
- 93257