Downey, California Weather
Summer heat deepens across the valleys. Day 15 of summer. Read this microseason across nine climate regions →
Downey weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Foggy——87°65°—
- MondayJul 6Overcast——85°61°-2°
- TuesdayJul 7Clear——88°63°+3°
- WednesdayJul 8Clear——90°70°+2°
- ThursdayJul 9Clear——87°72°-3°
- FridayJul 10Overcast——82°70°-5°
- SaturdayJul 11Overcast——83°70°+1°
AQI 61 (Moderate), driven by PM2.5. AQI flat over the last 6 hours (within ±3 points). PM2.5 at 18.9 µg/m³ (AQI 69) with a 0.82 fine-to-coarse ratio and 3 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
PM × Wind × Precip
PM2.5 at 18.9 µg/m³ (AQI 69) with a 0.82 fine-to-coarse ratio and 3 mph wind — combustion smoke trapped in calm air, not road dust.
- PM2.5/PM10
- 0.82
- Wind
- calm
- 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
- 11:08 PM
- Moonset
- 11:11 AM
- In sign
- ♓︎ Pisces
Summer heat deepens across the valleys
Downey at a glance
- Today vs. normal: 79°F — typical for the season
- Last frost: March 11 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP codes: 90240, 90241, 90242
16-Day Forecast — Downey
- Sun87°65°0%
- Mon85°61°0%
- Tue88°63°0%
- Wed90°70°0%
- Thu87°72°0%
- Fri82°70°0%
- Sat83°70°0%
- Sun89°71°2%
- Mon90°73°6%
- Tue88°74°8%
- Wed94°76°2%
- Thu96°76°10%
- Fri104°83°10%
- Sat107°80°10%
- Sun88°77°19%
- Mon92°76°19%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near Downey
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 Downey
- 90242
- 90240
- 90241
- 90239