Weather Forecast for St George

Utah, United States of America

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Sunny

Current Weather - St George: 45°C

Utah, United States of America

Sunny

Feels like 43°C

Wind

5 km/h WSW

Humidity

10%

Pressure

1012 mb

UV Index

11

Visibility

10 km

Sunny

Sunny

Friday, July 31, 2026

High

45°C

Low

25°C

Rain Chance

0%

Hourly Forecast

Clear 34°C
22:00
Clear 30°C
23:00
Aug 01

Day Statistics

Maximum Wind

19 km/h

Humidity

15%

Precipitation

0 mm

UV Index

11

Visibility

10 km

Rain Chance

0%

Snow Chance

0%

Sun & Moon

Sunrise

06:38 AM

Sunset

08:42 PM

Moonrise

10:01 PM

Moonset

08:46 AM

Moon Phase

Waning Gibbous

Moon Illumination

91%

Air Quality

PM2.5

2.8

μg/m³

PM10

5.9

μg/m³

NO₂

2.1

μg/m³

O₃

100.8

μg/m³

SO₂

0.4

μg/m³

CO

105.3

μg/m³

US EPA Index: 1 GB DEFRA Index: 1

Solar Radiation Data

Shortwave Radiation

963.76

Diffuse Radiation

96.23

DNI

0

GTI

0

Weather Alerts

Extreme Heat Warning issued July 31 at 4:58AM MDT until August 2 at 9:00PM MDT by NWS Salt Lake City UT

Lower Washington County; Zion National Park; South Central Utah; Capitol Reef National Park and Vicinity; Western Canyonlands; Glen Canyon Recreation Area/Lake Powell Jul 31, 04:58 AM - Jul 31, 08:00 PM
Severity: Severe Urgency: Expected

* WHAT...Dangerously hot conditions with temperatures up to 105 on Friday, up to 108 on Saturday, and up to 110 on Sunday. Warm overnight lows in the upper 60s to mid 70s will offer little relief. * WHERE...Capitol Reef National Park and Vicinity, Glen Canyon Recreation Area/Lake Powell, South Central Utah, Western Canyonlands, Lower Washington County, and Zion National Park. * WHEN...From noon today to 9 PM MDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.

Event: Extreme Heat Warning Certainty: Likely Category: Met

Extreme Heat Warning issued July 31 at 3:32AM PDT until August 2 at 8:00PM PDT by NWS Las Vegas NV

Northwest Plateau; Lake Havasu and Fort Mohave; Lake Mead - AZ side; Lake Mohave - AZ side; Hualapai Mountains; Northwest Deserts; Death Valley National Park; Western Mojave Desert; Eastern Mojave Desert, Including the Mojave National Preserve; Morongo Basin; Cadiz Basin; San Bernardino County-Upper Colorado River Valley; Owens Valley South; Owens Valley North; Esmeralda and Central Nye County; Lincoln County; Northeast Clark County; Western Clark and Southern Nye County; Las Vegas Valley; Southern Clark County; Lake Mead - NV side; Lake Mohave - NV side Jul 31, 03:32 AM - Jul 31, 05:15 PM
Severity: Severe Urgency: Expected

* WHAT...Dangerously hot conditions with highs 110 to 120 degrees across the Mojave Desert. Highs 100 to 110 degrees across most of the southern Great Basin and Arizona Strip. Little to no overnight relief is expected, particularly in the Mojave Desert where lows of 80 to 95 degrees are forecast. This will result in Major-to-Extreme Heat Risk. * WHERE...Portions of northwest Arizona, southeast California, and south central and southern Nevada. * WHEN...Until 8 PM PDT /8 PM MST/ Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Monitor the latest forecasts and warnings for updates.

Event: Extreme Heat Warning Certainty: Likely Category: Met

Extreme Heat Warning issued July 31 at 10:23AM MDT until August 2 at 9:00PM MDT by NWS Salt Lake City UT

Lower Washington County; Zion National Park; South Central Utah; Capitol Reef National Park and Vicinity; Western Canyonlands; Glen Canyon Recreation Area/Lake Powell Jul 31, 10:23 AM - Aug 1, 01:30 AM
Severity: Severe Urgency: Expected

* WHAT...Dangerously hot conditions with temperatures up to 105 on Friday, up to 108 on Saturday, and up to 110 on Sunday. Warm overnight lows in the upper 60s to mid 70s will offer little relief. * WHERE...Capitol Reef National Park and Vicinity, Glen Canyon Recreation Area/Lake Powell, South Central Utah, Western Canyonlands, Lower Washington County, and Zion National Park. * WHEN...Until 9 PM MDT Sunday. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. To reduce risk during outdoor work, the Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1.

Event: Extreme Heat Warning Certainty: Likely Category: Met

When to visit St George?

Plan your perfect trip with our month-by-month weather guide

⭐ Best months: April May September

January

☀️
11°C
💧
5 Days of rain
❄️
Heavy snow expected

February

☀️
14°C
💧
6 Days of rain
❄️
Heavy snow expected
🌧 Wettest month,

March

☀️
19°C
💧
5 Days of rain
❄️
Moderate snowfall

April

☀️
23°C
💧
3 Days of rain
❄️
Moderate snowfall
Best time to visit

May

☀️
28°C
💧
1 Days of rain
❄️
No snowfall
Best time to visit

June

☀️
35°C
💧
0 Days of rain
❄️
No snowfall
🌵 Driest month

July

☀️
37°C
💧
2 Days of rain
❄️
No snowfall
🔥 Hottest month

August

☀️
36°C
💧
2 Days of rain
❄️
No snowfall

September

☀️
32°C
💧
3 Days of rain
❄️
No snowfall
Best time to visit

October

☀️
24°C
💧
4 Days of rain
❄️
No snowfall

November

☀️
16°C
💧
3 Days of rain
❄️
Moderate snowfall

December

☀️
11°C
💧
4 Days of rain
❄️
Heavy snow expected
🥶 Coldest month