Alta, California Weather
Summer heat deepens across the valleys. Day 15 of summer. Read this microseason across nine climate regions →
Alta weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJul 5Overcast——81°64°—
- MondayJul 6Overcast——81°63°0°
- TuesdayJul 7Overcast——85°59°+4°
- WednesdayJul 8Clear——87°59°+2°
- ThursdayJul 9Clear——90°60°+3°
- FridayJul 10Overcast——93°64°+3°
- SaturdayJul 11Overcast——94°65°+1°
AQI 35 (Good), driven by Ozone. AQI up 7 over the last 6 hours (gradual rise). Ozone at AQI 71. Overcast through the UV peak window (cloud cover ~75%) — 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 71. Overcast through the UV peak window (cloud cover ~75%) — afternoon ozone should stay flat.
- Present
- AQI 71
- UV peak
- 9.4 at 1 PM
- Sky at peak
- overcast
- Projected peak
- AQI 44
PM × Wind × Precip
PM2.5 at 8.0 µg/m³ (AQI 44) with a 0.65 fine-to-coarse ratio and 5 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
- 11:23 PM
- Moonset
- 11:21 AM
- In sign
- ♓︎ Pisces
Summer heat deepens across the valleys
Alta at a glance
- Today vs. normal: 7°F above the seasonal normal for this latitude
- Last frost: April 11 (climatological average for this latitude)
- Microseason: Jul 1–5
- Planting window: Harvest early potatoes. Begin drying onions on the surface.
ZIP code: 95701
16-Day Forecast — Alta
- Sun81°64°5%
- Mon81°63°1%
- Tue85°59°0%
- Wed87°59°0%
- Thu90°60°0%
- Fri93°64°0%
- Sat94°65°0%
- Sun87°63°1%
- Mon89°59°3%
- Tue96°65°4%
- Wed95°67°3%
- Thu96°68°3%
- Fri98°70°10%
- Sat96°70°6%
- Sun92°66°7%
- Mon92°64°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 Alta
- 95701