Climate averages 1991–2020
Cary weather
in August.
A hot, wet month: the 2nd warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Cary: daytime highs average 29.8°C and nights cool to about 21.1°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 111 mm of rain on roughly 12 days, which makes August a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 31 min on an average August day.
The nearest other city in this atlas is Raleigh (13 km away). In August its highs average 30.1°C, about as warm as Cary, with 111 mm of rain.
Among the 498 cities listed in the United States, Cary ranks joint 253rd of 498 for the warmest August highs and joint 436th of 498 for the driest August (rainfall, lowest first). The mean August high of those 498 cities is 29.9°C; Cary is 0.1°C cooler than that mean.
From August to September, average highs fall by 3.2°C to 26.6°C, and monthly rainfall rises from 111 mm to 120 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
Cary climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 9.5°C0.9°C | 0.9°C | 93 | 9.3 | 10.010 h |
| February | 11.6°C2.0°C | 2.0°C | 81 | 9.1 | 10.911 h |
| March | 15.7°C5.3°C | 5.3°C | 104 | 10.3 | 11.912 h |
| April | 21.0°C10.3°C | 10.3°C | 90 | 9.1 | 13.113 h |
| May | 25.3°C15.2°C | 15.2°C | 90 | 10.4 | 14.014 h |
| June | 29.2°C19.7°C | 19.7°C | 103 | 12.1 | 14.515 h |
| July | 31.0°C22.0°C | 22.0°C | 116 | 15.2 | 14.314 h |
| August, selected | 29.8°C21.1°C | 21.1°C | 111 | 12.4 | 13.514 h |
| September | 26.6°C18.2°C | 18.2°C | 120 | 10.2 | 12.412 h |
| October | 21.2°C12.1°C | 12.1°C | 79 | 7.2 | 11.311 h |
| November | 15.5°C6.4°C | 6.4°C | 85 | 7.7 | 10.310 h |
| December | 11.2°C2.7°C | 2.7°C | 90 | 9.1 | 9.810 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
- Raleigh in AugustUnited States · 13 kmHigh 30.1°C · Low 21.4°C · 111 mm rain
- Durham in AugustUnited States · 25 kmHigh 30.2°C · Low 21.0°C · 99 mm rain
- Fayetteville in AugustUnited States · 83 kmHigh 30.5°C · Low 21.9°C · 125 mm rain
- Greensboro in AugustUnited States · 96 kmHigh 29.7°C · Low 20.4°C · 97 mm rain
- High Point in AugustUnited States · 112 kmHigh 29.7°C · Low 20.3°C · 99 mm rain
- Greenville in AugustUnited States · 129 kmHigh 29.9°C · Low 21.7°C · 137 mm rain
- Winston-Salem in AugustUnited States · 136 kmHigh 29.9°C · Low 20.2°C · 91 mm rain
- Concord (North Carolina), United States in AugustUnited States · 168 kmHigh 30.4°C · Low 21.2°C · 96 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 Cary) is explained once on the Cary year overview and on the Sources, method and limits page.
Raleigh lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.