Climate averages 1991–2020
Saint George weather
in August.
A very hot, very dry month: the 2nd warmest and the 4th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a very hot month in Saint George: daytime highs average 35.6°C and nights cool to about 24.8°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 14 mm of rain on roughly 3 days, which makes August a very dry month (the 4th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 35 min on an average August day.
The nearest other city in this atlas is Henderson (172 km away). In August its highs average 38.3°C, 2.7°C warmer than Saint George, with 10 mm of rain.
Among the 498 cities listed in the United States, Saint George ranks joint 26th of 498 for the warmest August highs and joint 128th of 498 for the driest August (rainfall, lowest first). The mean August high of those 498 cities is 29.9°C; Saint George is 5.7°C warmer than that mean.
From August to September, average highs fall by 4.3°C to 31.2°C, and monthly rainfall rises from 14 mm to 20 mm.
The annual picture
August 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 | 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, selected | 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
August in nearby cities
- Henderson in AugustUnited States · 172 kmHigh 38.3°C · Low 25.8°C · 10 mm rain
- Las Vegas in AugustUnited States · 173 kmHigh 37.6°C · Low 25.4°C · 9.7 mm rain
- Paradise in AugustUnited States · 179 kmHigh 37.8°C · Low 25.2°C · 12 mm rain
- Spring Valley in AugustUnited States · 185 kmHigh 37.3°C · Low 24.3°C · 12 mm rain
- Enterprise in AugustUnited States · 191 kmHigh 36.6°C · Low 23.8°C · 12 mm rain
- Flagstaff in AugustUnited States · 274 kmHigh 26.2°C · Low 15.2°C · 126 mm rain
- Provo in AugustUnited States · 386 kmHigh 30.2°C · Low 18.3°C · 8.0 mm rain
- Orem in AugustUnited States · 391 kmHigh 30.3°C · Low 17.5°C · 8.0 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.