St. George, Utah Weather
The monsoon exhales. Day 43 of summer. Read this microseason across nine climate regions →
St. George weather forecast — hour by hour, 7-day outlook, NOAA radar
- TodayAug 2Clear——112°76°—
- MondayAug 3Clear——111°79°-1°
- TuesdayAug 4Clear——108°83°-3°
- WednesdayAug 5Clear——108°86°0°
- ThursdayAug 6Clear——108°86°0°
- FridayAug 7Overcast——107°83°-1°
- SaturdayAug 8Overcast——110°85°+3°
AQI 53 (Moderate), driven by Ozone. AQI down 6 over the last 6 hours (gradual decline). Ozone at AQI 49 now. With UV 2.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 13.
OK No precautions needed for the general population; unusually sensitive individuals may consider limiting prolonged outdoor exertion during the projected peak around 9 PM.
What's driving it
Ozone × UV × Sky
Ozone at AQI 49 now. With UV 2.0 peaking around 1 PM under clear skies, surface ozone likely climbs to AQI 13.
- Present
- AQI 49
- UV peak
- 2.0 at 1 PM
- Sky at peak
- clear
- Projected peak
- AQI 13
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).
Red sky at night, sailor's delight.
- Moonrise
- 10:19 PM
- Moonset
- 10:43 AM
- In sign
- ♓︎ Pisces
The monsoon exhales
St. George at a glance
- Today vs. normal: 21°F above the seasonal normal for this latitude
- Last frost: March 29 (climatological average for this latitude)
- Microseason: Aug 1–5
- Planting window: Sow fall peas. Start kale and collard seedlings for fall.
16-Day Forecast — St. George
- Sun112°76°0%
- Mon111°79°0%
- Tue108°83°0%
- Wed108°86°1%
- Thu108°86°1%
- Fri107°83°2%
- Sat110°85°3%
- Sun107°85°8%
- Mon106°82°8%
- Tue104°81°8%
- Wed103°82°11%
- Thu103°84°9%
- Fri104°83°21%
- Sat104°86°23%
- Sun106°85°23%
- Mon108°85°13%
Forecast data from Open-Meteo (CC BY 4.0).
Live wind & temperature near St. George
Right now in the garden
Peak growing season
As of August 2, 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.
Sun & seasons in St. George
St. George sits in Washington County, where the year’s longest day runs 14h 43m of daylight and its shortest just 9h 37m — a swing of +5h 6m between the June and December solstices. Clocks spring forward on Sunday, March 8, 2026 and fall back on Sunday, November 1, 2026.
Salt Lake City, the state’s largest city, lies about 271 miles to the NNE. The nearest town St. George tracks is Enterprise, roughly 35 miles to the NNW.
Air quality in St. George’s county has held roughly steady since 2020; its cleanest year on record was 2023 (median AQI 43). See the full air-quality history for St. George.
ZIP codes in St. George
- 84770
- 84790
- 84791