Climate averages 1991–2020
Saint George weather
in May.
A hot, very dry month: the 5th warmest and the 2nd driest of the year. Meets the pleasant-weather rule
Long-term climate patterns, not a forecast for a particular trip.
May is a hot month in Saint George: daytime highs average 28.1°C and nights cool to about 15.7°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 8.5 mm of rain on roughly 2 days, which makes May a very dry month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 08 min on an average May day.
The nearest other city in this atlas is Henderson (172 km away). In May its highs average 30.7°C, 2.7°C warmer than Saint George, with 2.6 mm of rain.
Among the 498 cities listed in the United States, Saint George ranks joint 91st of 498 for the warmest May highs and 42nd of 498 for the driest May (rainfall, lowest first). The mean May high of those 498 cities is 23.8°C; Saint George is 4.3°C warmer than that mean.
From May to June, average highs rise by 6.1°C to 34.2°C, and monthly rainfall falls from 8.5 mm to 3.2 mm.
The annual picture
May in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Saint George climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 10.4°C0.1°C | 0.1°C | 35 | 5.1 | 9.910 h |
| February | 12.8°C1.9°C | 1.9°C | 42 | 6.2 | 10.811 h |
| March | 17.6°C5.8°C | 5.8°C | 34 | 5.6 | 11.912 h |
| April | 22.3°C9.9°C | 9.9°C | 18 | 3.0 | 13.113 h |
| May, selected | 28.1°C15.7°C | 15.7°C | 8.5 | 2.1 | 14.114 h |
| June | 34.2°C21.7°C | 21.7°C | 3.2 | 0.5 | 14.715 h |
| July | 36.8°C25.9°C | 25.9°C | 9.7 | 2.1 | 14.414 h |
| August | 35.6°C24.8°C | 24.8°C | 14 | 2.8 | 13.614 h |
| September | 31.2°C19.2°C | 19.2°C | 20 | 2.7 | 12.512 h |
| October | 23.8°C11.8°C | 11.8°C | 25 | 3.4 | 11.311 h |
| November | 16.1°C4.9°C | 4.9°C | 22 | 3.2 | 10.210 h |
| December | 9.9°C0.2°C | 0.2°C | 28 | 4.8 | 9.710 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
May in nearby cities
- Henderson in MayUnited States · 172 kmHigh 30.7°C · Low 17.5°C · 2.6 mm rain
- Las Vegas in MayUnited States · 173 kmHigh 30.1°C · Low 16.8°C · 5.4 mm rain
- Paradise in MayUnited States · 179 kmHigh 30.2°C · Low 16.7°C · 4.2 mm rain
- Spring Valley in MayUnited States · 185 kmHigh 29.6°C · Low 15.7°C · 4.2 mm rain
- Enterprise in MayUnited States · 191 kmHigh 28.9°C · Low 15.4°C · 4.2 mm rain
- Flagstaff in MayUnited States · 274 kmHigh 20.5°C · Low 7.7°C · 32 mm rain
- Provo in MayUnited States · 386 kmHigh 19.5°C · Low 8.1°C · 43 mm rain
- Orem in MayUnited States · 391 kmHigh 19.3°C · Low 7.3°C · 43 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Saint George) is explained once on the Saint George year overview and on the Sources, method and limits page.