Climate averages 1991–2020
Scottsdale weather
in August.
A very hot, fairly dry month: the joint 2nd warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a very hot month in Scottsdale: daytime highs average 39.3°C and nights cool to about 27.2°C. By daytime temperature it is the joint 2nd warmest of the 12 months.
Expect about 29 mm of rain on roughly 4 days, which makes August a fairly dry month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 24 min on an average August day.
The nearest other city in this atlas is Tempe (11 km away). In August its highs average 39.5°C, about as warm as Scottsdale, with 29 mm of rain.
Among the 498 cities listed in the United States, Scottsdale ranks joint 11th of 498 for the warmest August highs and joint 153rd of 498 for the driest August (rainfall, lowest first). The mean August high of those 498 cities is 29.9°C; Scottsdale is 9.4°C warmer than that mean.
From August to September, average highs fall by 2.7°C to 36.5°C, and monthly rainfall falls from 29 mm to 24 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
Scottsdale climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 18.4°C4.7°C | 4.7°C | 32 | 3.7 | 10.210 h |
| February | 20.1°C6.2°C | 6.2°C | 38 | 4.1 | 11.011 h |
| March | 24.2°C9.0°C | 9.0°C | 26 | 2.8 | 12.012 h |
| April | 28.7°C12.9°C | 12.9°C | 8.0 | 1.3 | 13.013 h |
| May | 33.8°C18.2°C | 18.2°C | 4.1 | 0.6 | 13.914 h |
| June | 39.3°C23.6°C | 23.6°C | 1.8 | 0.4 | 14.314 h |
| July | 40.3°C27.7°C | 27.7°C | 19 | 3.5 | 14.114 h |
| August, selected | 39.3°C27.2°C | 27.2°C | 29 | 4.4 | 13.413 h |
| September | 36.5°C23.1°C | 23.1°C | 24 | 3.1 | 12.412 h |
| October | 30.4°C15.8°C | 15.8°C | 20 | 2.2 | 11.411 h |
| November | 23.5°C9.3°C | 9.3°C | 18 | 2.2 | 10.510 h |
| December | 17.7°C4.6°C | 4.6°C | 28 | 3.6 | 10.010 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
- Tempe in AugustUnited States · 11 kmHigh 39.5°C · Low 27.3°C · 29 mm rain
- Mesa in AugustUnited States · 12 kmHigh 39.3°C · Low 26.9°C · 25 mm rain
- Phoenix in AugustUnited States · 18 kmHigh 39.6°C · Low 27.5°C · 29 mm rain
- Chandler in AugustUnited States · 23 kmHigh 39.7°C · Low 26.8°C · 26 mm rain
- Glendale (Arizona), United States in AugustUnited States · 27 kmHigh 39.6°C · Low 27.7°C · 27 mm rain
- Peoria (Arizona), United States in AugustUnited States · 32 kmHigh 39.4°C · Low 27.6°C · 27 mm rain
- Surprise in AugustUnited States · 42 kmHigh 39.4°C · Low 27.6°C · 23 mm rain
- Avondale in AugustUnited States · 43 kmHigh 40.2°C · Low 28.0°C · 27 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 Scottsdale) is explained once on the Scottsdale year overview and on the Sources, method and limits page.
Phoenix and Tempe lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.