St. George, UT weather in May
St. George is warm and mostly dry in May: highs average 85°F and nights drop to about 56°F. There are about 3 days with rain.
- Normal high
- 85°F
- Normal low
- 56°F
- Wet days
- 3
- 0.3 in total
- Daylight
- 14.2 h
How May changes from start to finish
| May 1 | May 31 | |
|---|---|---|
| Normal high | 79°F | 91°F |
| Normal low | 51°F | 60°F |
| Chance of a wet day | 10% | 8% |
| Sunrise / sunset | 6:39 am / 8:23 pm | 6:16 am / 8:47 pm |
| Daylight | 13.7 h | 14.5 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Mountain Time).
What kind of days to expect
- Comfortable dayshigh 65-80°F (temperature only: no humidity station nearby)7 of 31
- Hot dayshigh 90°F or more13 of 31
- Wet daysat least 0.01 in of rain or melted snow3 of 31
- Notable rainat least 0.10 in1 of 31
- Freezing nightslow 32°F or below0 of 31
- Snow on the groundsnow depth 1 in or more0 of 31
Average days per May, counted from daily records for each year 1991-2020.
Rain in May
Normal precipitation is 0.3 in; a dry May brings about 0.07 in and a wet one about 0.4 in (25th and 75th percentiles). Days with half an inch or more are rare.
How May varies from year to year
- Warmest May, 1991-20202000: average high 94°F
- Coolest May2019: average high 77°F
- Wettest May2019: 2.0 in
- Driest May2004: no measurable precipitation
- Highest reading108°F (May 28, 2003)
- Lowest reading37°F (May 7, 1995)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
May compared with April and June
| April | May | June | |
|---|---|---|---|
| Normal high | 75°F | 85°F | 96°F |
| Normal low | 46°F | 56°F | 65°F |
| Wet days | 3 | 3 | 1 |
| Comfortable days | 16 | 7 | 1 |
| Daylight | 13.2 h | 14.2 h | 14.7 h |
Highs change by +10°F from April and +11°F into June.
Nearby alternatives in May
- Warmer: Furnace Creek, CA187 mi · high 101°F · 1 wet day
- Cooler: Bryce Canyon City, UT88 mi · high 63°F · 6 wet days
How St. George ranks in May
- Normal high58th warmest of 378 cities; 1st of 7 in Utah
- Wet days57th driest of 378
What to pack for St. George in May
- Light, breathable clothing – highs near 85°F
- Layers – afternoons near 85°F but nights near 56°F
- Sunglasses and sunscreen – about 14.2 hours of daylight and highs near 85°F
Heating and cooling
May has 38 heating degree days and 207 cooling degree days (base 65°F), 4% of the year's total heating and cooling demand.
Questions
How hot is St. George in May?
The normal high is 85°F and the normal low is 56°F. From 1991 to 2020 the hottest May reading was 108°F (May 28, 2003).
Does it rain a lot in St. George in May?
About 3 days in May have at least 0.01 in of precipitation, and the normal total is 0.3 in. The wettest May in 1991-2020 was in 2019 (2.1 in); the driest was in 2004, with no measurable precipitation.
Is May a good time to visit St. George?
May ranks 6th of 12 months on our comfort score for St. George (57 out of 100). It has about 7 comfortable days (judged by temperature only) and about 13 days at 90°F or hotter. The best months are March and April.
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).