Alta, Utah Weather
Paintbrush crowns the ridges. Day 88 of spring. Read this microseason across nine climate regions →
Alta weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayJun 15Overcast——63°44°—
- TuesdayJun 16Overcast——66°47°+3°
- WednesdayJun 17Clear——65°49°-1°
- ThursdayJun 18Overcast——67°42°+2°
- FridayJun 19Light Drizzle14%—74°48°+7°
- SaturdayJun 20Overcast14%—68°47°-6°
- SundayJun 21Overcast——64°43°-4°
AQI 38 (Good), driven by Ozone. Ozone at AQI 75 now. With UV 8.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 83 around 1 PM.
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 75 now. With UV 8.3 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 83 around 1 PM.
- Present
- AQI 75
- UV peak
- 8.3 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 83
PM × Wind × Precip
PM2.5 at 5.1 µg/m³ (AQI 28), ratio 0.60 with 11 mph wind — characteristic of long-range haze transport rather than a local source.
- PM2.5/PM10
- 0.60
- Wind
- breezy
- 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).
A summer fog for fair, a winter fog for rain.
- Moonrise
- 6:00 AM
- Moonset
- 9:19 PM
- In sign
- ♋︎ Cancer
Paintbrush crowns the ridges
Alta at a glance
- Today vs. normal: 15°F below the seasonal normal for this latitude
- Last frost: April 19 (climatological average for this latitude)
- Microseason: Jun 11–15
- Planting window: Stake and prune tomato suckers. Watch for squash vine borers.
16-Day Forecast — Alta
- Mon63°44°0%
- Tue66°47°1%
- Wed65°49°0%
- Thu67°42°0%
- Fri74°48°14%
- Sat68°47°14%
- Sun64°43°7%
- Mon70°46°2%
- Tue75°52°1%
- Wed76°51°2%
- Thu71°49°3%
- Fri66°46°3%
- Sat63°46°5%
- Sun70°44°9%
- Mon77°49°10%
- Tue77°56°10%
Forecast data from Open-Meteo (CC BY 4.0).
Right now in the garden
Warm-season window is open
As of June 15, the last spring frost has passed for most years. Transplant tomatoes, peppers, eggplants, basil, and cucurbits (cucumbers, squash, melons) now. Direct-sow beans and corn into warm soil.
ZIP codes in Alta
- 84092