Climate averages 1991–2020
Round Rock weather
in August.
A very hot, moderately wet month: the warmest and the 2nd driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a very hot month in Round Rock: daytime highs average 34.7°C and nights cool to about 24.6°C. By daytime temperature it is the warmest month of the year.
Expect about 54 mm of rain on roughly 6 days, which makes August a moderately wet month (the 2nd driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 15 min on an average August day.
The nearest other city in this atlas is Austin (28 km away). In August its highs average 35.0°C, about as warm as Round Rock, with 59 mm of rain.
Among the 498 cities listed in the United States, Round Rock ranks joint 38th of 498 for the warmest August highs and 208th of 498 for the driest August (rainfall, lowest first). The mean August high of those 498 cities is 29.9°C; Round Rock is 4.8°C warmer than that mean.
From August to September, average highs fall by 3.7°C to 31.1°C, and monthly rainfall rises from 54 mm to 74 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
Round Rock climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 15.6°C5.8°C | 5.8°C | 59 | 6.8 | 10.410 h |
| February | 17.8°C7.6°C | 7.6°C | 61 | 7.4 | 11.111 h |
| March | 21.4°C11.0°C | 11.0°C | 74 | 8.8 | 12.012 h |
| April | 25.5°C14.9°C | 14.9°C | 76 | 8.2 | 12.913 h |
| May | 28.9°C19.3°C | 19.3°C | 110 | 10.8 | 13.714 h |
| June | 32.4°C22.7°C | 22.7°C | 72 | 8.7 | 14.114 h |
| July | 34.5°C24.2°C | 24.2°C | 39 | 5.7 | 13.914 h |
| August, selected | 34.7°C24.6°C | 24.6°C | 54 | 5.8 | 13.313 h |
| September | 31.1°C21.5°C | 21.5°C | 74 | 7.4 | 12.412 h |
| October | 26.4°C16.4°C | 16.4°C | 86 | 7.1 | 11.511 h |
| November | 20.3°C10.8°C | 10.8°C | 69 | 6.6 | 10.611 h |
| December | 16.3°C6.8°C | 6.8°C | 70 | 7.5 | 10.210 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
- Austin in AugustUnited States · 28 kmHigh 35.0°C · Low 24.8°C · 59 mm rain
- Killeen in AugustUnited States · 68 kmHigh 34.4°C · Low 24.6°C · 53 mm rain
- Temple in AugustUnited States · 73 kmHigh 34.6°C · Low 24.7°C · 58 mm rain
- New Braunfels in AugustUnited States · 99 kmHigh 34.9°C · Low 24.5°C · 56 mm rain
- Waco in AugustUnited States · 126 kmHigh 35.0°C · Low 25.1°C · 49 mm rain
- Bryan in AugustUnited States · 127 kmHigh 34.7°C · Low 24.7°C · 63 mm rain
- College Station in AugustUnited States · 129 kmHigh 34.6°C · Low 24.7°C · 63 mm rain
- San Antonio in AugustUnited States · 144 kmHigh 35.1°C · Low 24.7°C · 50 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 Round Rock) is explained once on the Round Rock year overview and on the Sources, method and limits page.