Climateby Month

St. George, UT climate by month

NOAA 1991-2020 normals · 2,696 ft elevation

Summers in St. George are very hot; winters are chilly. Highs peak at 102°F in July and fall to 53°F in December. The wettest month is January (about 6 wet days) and the driest is June (about 1). Normal snowfall is about 1.2 in a year. The most comfortable time to visit is March and April.

Warmest month
102°F
July normal high
Coldest month
28°F
December normal low
Wet days a year
42
9.3 in of precipitation
Snow a year
1.2 in
normal snowfall

How warm is St. George?

Normal highs range from 53°F in December to 102°F in July.

20°40°60°80°100°120° January: normal high 54°F (12°C), low 28°F (-2°C) February: normal high 59°F (15°C), low 32°F (0°C) March: normal high 68°F (20°C), low 39°F (4°C) April: normal high 75°F (24°C), low 46°F (8°C) May: normal high 85°F (29°C), low 56°F (13°C) June: normal high 96°F (36°C), low 65°F (18°C) July: normal high 102°F (39°C), low 72°F (22°C) 102° 72° August: normal high 100°F (38°C), low 70°F (21°C) September: normal high 92°F (33°C), low 61°F (16°C) October: normal high 79°F (26°C), low 47°F (8°C) November: normal high 64°F (18°C), low 35°F (2°C) December: normal high 53°F (12°C), low 28°F (-2°C) 53° 28° JFMAMJJASOND

Bars run from the normal low to the normal high for each month.

How rainy is St. George?

January has the most wet days (about 6); the year brings about 9.3 in of precipitation.

January: 6 wet days 6 February: 6 wet days March: 5 wet days April: 3 wet days May: 3 wet days June: 1 wet days 1 July: 3 wet days August: 3 wet days September: 2 wet days October: 3 wet days November: 3 wet days December: 5 wet days JFMAMJJASOND

Wet day: at least 0.01 in of rain or melted snow, counted from daily records 1991-2020.

How much does it snow?

Normal snowfall is 1.2 in a year, most of it in January.

January: 0.5 in of snow 0.5 February: 0.5 in of snow March: 0.2 in of snow April: 0.0 in of snow 0.0 May: 0.0 in of snow June: 0.0 in of snow July: 0.0 in of snow August: 0.0 in of snow September: 0.0 in of snow October: 0.0 in of snow November: 0.0 in of snow December: 0.0 in of snow JFMAMJJASOND

How humid is St. George?

Humidity data is not available for this location.

How much daylight?

Daylight ranges from about 9.7 hours in December to 14.7 hours in June.

January: 9.9 hours of daylight February: 10.8 hours of daylight March: 12.0 hours of daylight April: 13.2 hours of daylight May: 14.2 hours of daylight June: 14.7 hours of daylight 14.7 July: 14.4 hours of daylight August: 13.6 hours of daylight September: 12.4 hours of daylight October: 11.2 hours of daylight November: 10.2 hours of daylight December: 9.7 hours of daylight 9.7 JFMAMJJASOND
See all numbers
Monthly climate normals and day counts for St. George, 1991-2020
MonthHighLowPrecip.Wet daysSnowDaylight
January 54°F28°F 1.2 in6 0.5 in 9.9 h
February 59°F32°F 1.4 in6 0.5 in 10.8 h
March 68°F39°F 1.0 in5 0.2 in 12.0 h
April 75°F46°F 0.7 in3 0.0 in 13.2 h
May 85°F56°F 0.3 in3 0.0 in 14.2 h
June 96°F65°F 0.2 in1 0.0 in 14.7 h
July 102°F72°F 0.5 in3 0.0 in 14.4 h
August 100°F70°F 1.1 in3 0.0 in 13.6 h
September 92°F61°F 0.7 in2 0.0 in 12.4 h
October 79°F47°F 0.8 in3 0.0 in 11.2 h
November 64°F35°F 0.7 in3 0.0 in 10.2 h
December 53°F28°F 0.9 in5 0.0 in 9.7 h

High and low: NOAA 1991-2020 normal daily high and low. Wet days: at least 0.01 in of rain or melted snow. Muggy days: daily mean dew point 65°F or higher.

Best months to visit St. George

By our comfort score, the best months are March and April.

Comfort score by month (0-100) and its parts, in days per month
MonthScoreComfortableNotable rainHot or cold
Jan 48231
Feb 59930
Mar 762020
Apr 741622
May 577113
Jun 421126
Jul 380231
Aug 360230
Sep 391123
Oct 641424
Nov 661510
Dec 46231

Score = 40 × share of comfortable days + 25 × share of days without notable rain + 20 × share of days neither hot (90°F+) nor cold (high 40°F or below) + 15 × daylight. Comfortable days here are judged by temperature only (no humidity station nearby). How the score works.

Frost dates in St. George

The last spring frost typically comes around Mar 14, and the first fall frost around Nov 10, leaving 239 frost-free days in a typical year.

Frost and freeze dates for St. George
Typical date1 year in 10
Last spring frost (32°F)Mar 14after Apr 6
First fall frost (32°F)Nov 10before Oct 27
Last hard freeze (28°F)Feb 27after Mar 17
First hard freeze (28°F)Nov 20before Nov 7
Frost-free season239 daysunder 212 days

"Typical" is the date with a 50% chance of a later spring frost (or earlier fall frost). Planting after the "1 year in 10" spring date gives a 90% chance of no further frost. The Old Farmer's Almanac publishes 30% dates, which fall between our typical and 1-in-10 dates.

Station: St George (USC00427516), NOAA 1991-2020 freeze probabilities. Frost dates for every city in Utah.

Hottest and coldest readings, 1991-2020

The highest reading was 115°F (August 17, 2020); the lowest was 13°F (January 1, 1991).

From the temperature station's daily records with NOAA quality flags removed. Not an all-time record.

Near St. George

Similar climates elsewhere

Where the numbers come from

  • Temperature, rain, snowfall, snow depth and frost dates: St George (USC00427516), 1.6 mi NW of the city center, 2,857 ft (161 ft higher than the city). NOAA normals and daily records, 1991-2020.
  • Not available for this location: humidity and wind by hour, cloud cover and daily humidity and wind (no station close enough or similar enough in elevation).

Distances from the city center (USGS). Methodology · Report an error