San Fernando, California Weather
Summer heat deepens across the valleys. Day 15 of summer. Read this microseason across nine climate regions →
San Fernando weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Partly Cloudy——88°64°—
- MondayJul 6Clear——90°60°+2°
- TuesdayJul 7Clear——95°64°+5°
- WednesdayJul 8Clear——98°74°+3°
- ThursdayJul 9Clear——96°76°-2°
- FridayJul 10Clear——92°73°-4°
- SaturdayJul 11Overcast——92°73°0°
AQI 54 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 13.8 µg/m³ (AQI 60) with a 0.71 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
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 31 now. With UV 9.9 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 41 around 1 PM.
- Present
- AQI 31
- UV peak
- 9.9 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 41
PM × Wind × Precip
PM2.5 at 13.8 µg/m³ (AQI 60) with a 0.71 fine-to-coarse ratio and 5 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.71
- 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
- 11:10 PM
- Moonset
- 11:12 AM
- In sign
- ♓︎ Pisces
Summer heat deepens across the valleys
San Fernando at a glance
- Today vs. normal: 79°F — typical for the season
- Last frost: March 13 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 91340
16-Day Forecast — San Fernando
- Sun87°64°0%
- Mon90°60°0%
- Tue95°64°0%
- Wed98°74°0%
- Thu96°76°0%
- Fri92°73°0%
- Sat92°73°0%
- Sun96°73°1%
- Mon97°75°4%
- Tue95°77°6%
- Wed100°80°3%
- Thu100°81°10%
- Fri109°87°9%
- Sat115°86°6%
- Sun96°82°10%
- Mon99°79°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 San Fernando
- 91340
- 91341