St. George, UT Climate & Monthly Averages
The climate of St. George
With 8.3 inches (211 mm) of annual precipitation, St. George is one of the drier places we cover. January is the wettest month it gets, at 1.4 inches (36 mm), and the year runs between 53°F (11°C) and 103°F (39°C) by day.
Climate quick facts
- Hottest month: July - highs near 103°F (39°C)
- Coldest month: January - highs near 53°F (11°C)
- Decade extremes (2015-2024): 116°F (46°C) high · 16°F (-9°C) low
- Wettest month: January (6 rainy days) · Sunniest: June (13.9 h sun/day)
- Climate type: hot desert
- Annual swing: 27°C between the average warmest and coolest month · day to night: 12°C
- Snow: about 3 days a year
- Months averaging 30°C or hotter: 4
- Average humidity: 34%
Temperatures through the year
Snow falls on roughly 3 days a year, mostly February through March. At its warmest, in July, St. George runs to 103°F (39°C) in the afternoon and back to 80°F (26°C) by dawn. January sits at the other end of the year: 53°F (11°C) by day, 35°F (2°C) at night. The gridded 2015-2024 daily record for this location tops out at 116°F (46°C) and bottoms at 16°F (-9°C) - decade extremes, not all-time station records. Average highs hold at or above 30°C for 4 months of the year, June through September being the unbroken run.
Rain, sun and snow
Sunshine averages 11.0 hours a day over the year - sunnier than 95% of the 3496 cities in our dataset, peaking in June at 13.9 hours.
How St. George compares
- Relative humidity averages 34% - drier than almost every other city we track.
- Annual precipitation is 8.3 inches (211 mm) - drier than all but 4% of the 3496 cities we track.
- Rain or snow reaches the ground on 37 days a year - fewer wet days than all but 5% of the 3496 cities we track.
Ranked against every city in our dataset, each measured on the same ten-year window.
Monthly climate table
| Month | High | Low | Rain days | Precipitation | Sunshine | Daylight | Wet-day chance | Humidity |
|---|---|---|---|---|---|---|---|---|
| January | 53° | 35° | 6 | 1.4 in | 8.1 h/day | 9.9 h | 19% | 56% |
| February | 58° | 37° | 5 | 1.2 in | 9.3 h/day | 10.8 h | 18% | 48% |
| March | 66° | 44° | 6 | 1.3 in | 10.3 h/day | 11.9 h | 20% | 43% |
| April | 77° | 52° | 2 | 0.5 in | 12.2 h/day | 13.1 h | 7% | 27% |
| May | 85° | 61° | 2 | 0.3 in | 12.8 h/day | 14.1 h | 5% | 22% |
| June | 99° | 74° | 0 | 0.1 in | 13.9 h/day | 14.7 h | 1% | 14% |
| July | 103° | 80° | 2 | 0.3 in | 13.1 h/day | 14.5 h | 6% | 21% |
| August | 100° | 76° | 2 | 0.4 in | 12.6 h/day | 13.6 h | 7% | 26% |
| September | 93° | 69° | 2 | 0.4 in | 11.7 h/day | 12.4 h | 6% | 25% |
| October | 79° | 55° | 2 | 0.6 in | 10.4 h/day | 11.2 h | 7% | 32% |
| November | 63° | 43° | 3 | 0.8 in | 9.1 h/day | 10.1 h | 9% | 39% |
| December | 53° | 35° | 5 | 1.1 in | 8.0 h/day | 9.6 h | 15% | 49% |
St. George month by month
Average high and low for each month, with the bar showing where it sits in St. George's year (left is the coldest night, right is the warmest afternoon).
January
- Rain
- 6 days
- Sunshine
- 8.1 h
- Daylight
- 9.9 h
February
- Rain
- 5 days
- Sunshine
- 9.3 h
- Daylight
- 10.8 h
- Snow
- 1 day
March
- Rain
- 6 days
- Sunshine
- 10.3 h
- Daylight
- 11.9 h
April
- Rain
- 2 days
- Sunshine
- 12.2 h
- Daylight
- 13.1 h
May
- Rain
- 2 days
- Sunshine
- 12.8 h
- Daylight
- 14.1 h
June
- Rain
- 0 days
- Sunshine
- 13.9 h
- Daylight
- 14.7 h
July
- Rain
- 2 days
- Sunshine
- 13.1 h
- Daylight
- 14.5 h
August
- Rain
- 2 days
- Sunshine
- 12.6 h
- Daylight
- 13.6 h
September
- Rain
- 2 days
- Sunshine
- 11.7 h
- Daylight
- 12.4 h
October
- Rain
- 2 days
- Sunshine
- 10.4 h
- Daylight
- 11.2 h
November
- Rain
- 3 days
- Sunshine
- 9.1 h
- Daylight
- 10.1 h
December
- Rain
- 5 days
- Sunshine
- 8.0 h
- Daylight
- 9.6 h
Warmer places to go, by month: January · February · March · April · May · June · July · August · September · October · November · December
Seasons in St. George
Spring (March through May)
Through spring, St. George brings comfortable warmth: 76°F (25°C) by day, 52°F (11°C) after dark, and rain comes on about 10 days over the three months. Daylight is generous - around 11.8 hours of sun a day.
Summer (June through August)
Through summer, St. George runs at full heat: 100°F (38°C) by day, 77°F (25°C) after dark, and precipitation is sparse, near 19 mm (0.8 in) for the season. Daylight is generous - around 13.2 hours of sun a day.
Fall (September through November)
Through fall, St. George brings comfortable warmth: 78°F (26°C) by day, 55°F (13°C) after dark, and precipitation is sparse, near 1.8 inches (45 mm) for the season. Daylight is generous - around 10.4 hours of sun a day.
Winter (December through February)
Winter in St. George is mild, with daytime highs averaging 54°F (12°C) and nights around 36°F (2°C); rain comes on about 16 days over the three months, plus about 2 snowy days.
Climate questions, answered
How cold does St. George get in winter?
How hot does St. George get in summer?
How much do temperatures drop at night in St. George?
Does it rain a lot in St. George?
How sunny is St. George?
Best time to visit St. George
The best time to visit St. George is generally March to April and October to November, when temperatures sit either side of the peak heat rather than in it. Daytime temperatures in that window sit near 71°F (22°C), with rain on about 3 days a month. For the same question asked the other way round, see where else is warm in March.
Pack for St. George with lightweight, breathable clothing and serious sun protection and a warm jacket and layers for the cooler season. Even in July, lows of 80°F (26°C) make an extra layer worth the space.
St. George temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ. Need the precipitation in other units? The mm-to-inches rainfall converter handles it.