St. George weather in May: St. George, Utah: normal highs, lows, rain and records for May
St. George in May has a normal high of 85°F and a normal low of 56°F, a daily mean of 71°F, rising from 79°F on the 1st to 91°F by the 31st. Measurable precipitation falls on 3 days in a normal May, 0.33 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 30°C and low of 13°C, 8 mm of precipitation in May.
- NOAA stationSt George
- Station IDUSC00427516
- Location37.12°N 113.61°W
- Elevation2,857 ft (871 m)
- Population106,288
- Jan 54° 28°
- Feb 59° 32°
- Mar 68° 39°
- Apr 75° 46°
- May 85° 56°
- Jun 96° 65°
- Jul 102° 72°
- Aug 100° 70°
- Sep 92° 61°
- Oct 79° 47°
- Nov 64° 35°
- Dec 53° 28°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is St. George in May?
The normal high is 85°F and the normal low 56°F, for a daily mean of 70.5°F. May is 10.1°F warmer than April and 9.9°F cooler than June. May is the 5th warmest month of the year in St. George and the 11th wettest. Across the month the normal high rises 12°F, from 79°F on May 1 to 91°F on May 31. From one year to the next May's mean temperature typically moves about 3.7°F either way (NOAA's standard deviation), so roughly two Mays in three average between 67°F and 74°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 10%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| May 1 | 79°F | 51°F | 10% | 5% |
| May 8 | 82°F | 53°F | 10% | 4% |
| May 15 | 85°F | 55°F | 10% | 4% |
| May 22 | 88°F | 58°F | 9% | 3% |
| May 31 | 91°F | 60°F | 8% | 3% |
Every day of May: normal high, low and chance of precipitation (warmest afternoon May 31, coldest night May 1)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| May 1 | 79°F | 51°F | 10% | 5% | 13 h 40 min |
| May 2 | 80°F | 51°F | 10% | 5% | 13 h 40 min |
| May 3 | 80°F | 51°F | 10% | 5% | 13 h 50 min |
| May 4 | 81°F | 52°F | 10% | 5% | 13 h 50 min |
| May 5 | 81°F | 52°F | 10% | 4% | 13 h 50 min |
| May 6 | 81°F | 52°F | 10% | 4% | 13 h 50 min |
| May 7 | 82°F | 53°F | 10% | 4% | 13 h 50 min |
| May 8 | 82°F | 53°F | 10% | 4% | 14 h |
| May 9 | 83°F | 53°F | 10% | 4% | 14 h |
| May 10 | 83°F | 54°F | 10% | 4% | 14 h |
| May 11 | 83°F | 54°F | 10% | 4% | 14 h |
| May 12 | 84°F | 54°F | 10% | 4% | 14 h |
| May 13 | 84°F | 55°F | 10% | 4% | 14 h |
| May 14 | 85°F | 55°F | 10% | 4% | 14 h 10 min |
| May 15 | 85°F | 55°F | 10% | 4% | 14 h 10 min |
| May 16 | 85°F | 56°F | 9% | 4% | 14 h 10 min |
| May 17 | 86°F | 56°F | 9% | 4% | 14 h 10 min |
| May 18 | 86°F | 56°F | 9% | 4% | 14 h 10 min |
| May 19 | 87°F | 57°F | 9% | 4% | 14 h 10 min |
| May 20 | 87°F | 57°F | 9% | 3% | 14 h 20 min |
| May 21 | 88°F | 57°F | 9% | 3% | 14 h 20 min |
| May 22 | 88°F | 58°F | 9% | 3% | 14 h 20 min |
| May 23 | 88°F | 58°F | 9% | 3% | 14 h 20 min |
| May 24 | 89°F | 58°F | 9% | 3% | 14 h 20 min |
| May 25 | 89°F | 58°F | 9% | 3% | 14 h 20 min |
| May 26 | 90°F | 59°F | 9% | 3% | 14 h 20 min |
| May 27 | 90°F | 59°F | 8% | 3% | 14 h 30 min |
| May 28 | 90°F | 59°F | 8% | 3% | 14 h 30 min |
| May 29 | 91°F | 60°F | 8% | 3% | 14 h 30 min |
| May 30 | 91°F | 60°F | 8% | 3% | 14 h 30 min |
| May 31 | 91°F | 60°F | 8% | 3% | 14 h 30 min |
- Normal high
- 85°FMay average
- Normal low
- 56°FMay average
- Precipitation
- 0.33 inmonth total
- Days with precipitation
- 30.01 inch or more
- Days at 90°F or more
- 13
- Daylight
- 13 h 40 min to 14 h 30 minMay 1 to May 31
- Days at 70°F or more
- 30
- Days at 80°F or more
- 25
- Sunshine
- 88%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USC00427516; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in St. George in May?
On a given May day the chance of 0.01 inch or more is 9% on average, highest around May 1 (10%). In all, 0.33 in falls on 3 days of a normal May.
In a normal May in St. George, 13 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USC00427516.
What are the records for May in St. George?
The warmest May temperature on this station's record (since 1893) is 108°F, on May 31, 1910; the coldest is 20°F, on May 3, 1899. The wettest May brought 2.05 in (2019).
The May mean against the 1991-2020 normal of 70.5°F: 2021 72.3°F (+1.8), 2022 72.1°F (+1.6), 2023 71.1°F (+0.6), 2024 70.7°F (+0.2), 2025 71.7°F (+1.2), 2026 72.5°F (+2.0). 6 of 6 ran warmer than normal.
| May | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 72.3°F | +1.8°F | 0.00 in |
| 2022 | 72.1°F | +1.6°F | 0.00 in |
| 2023 | 71.1°F | +0.6°F | 0.19 in |
| 2024 | 70.7°F | +0.2°F | 0.00 in |
| 2025 | 71.7°F | +1.2°F | 1.15 in |
| 2026 | 72.5°F | +2.0°F | 0.08 in |
Source: records: ACIS, station USC00427516; recent months: ACIS, station USC00427516. Records and recent months use complete months only.
How does May in St. George compare across Utah?
Across the 97 places PlainClimate covers in Utah, May normal highs run from 53°F in Alta to 85°F in St. George; St. George's is 85°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.