Climate averages 1991–2020
Houston weather
in August.
A hot, wet month: the warmest and the 6th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
August is a hot month in Houston: daytime highs average 33.3°C and nights cool to about 24.5°C. By daytime temperature it is the warmest month of the year.
Expect about 98 mm of rain on roughly 13 days, which makes August a wet month (the 6th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 13 min on an average August day.
The nearest other city in this atlas is Pasadena (Texas), United States (17 km away). In August its highs average 33.0°C, about as warm as Houston, with 98 mm of rain.
Among the 498 cities listed in the United States, Houston ranks joint 80th of 498 for the warmest August highs and joint 383rd of 498 for the driest August (rainfall, lowest first). The mean August high of those 498 cities is 29.9°C; Houston is 3.4°C warmer than that mean.
From August to September, average highs fall by 2.5°C to 30.8°C, and monthly rainfall rises from 98 mm to 118 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
Houston climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 16.7°C7.5°C | 7.5°C | 106 | 10.0 | 10.510 h |
| February | 18.7°C9.3°C | 9.3°C | 84 | 9.1 | 11.111 h |
| March | 21.9°C12.5°C | 12.5°C | 94 | 9.2 | 12.012 h |
| April | 25.4°C15.9°C | 15.9°C | 96 | 8.9 | 12.913 h |
| May | 29.1°C20.3°C | 20.3°C | 90 | 9.8 | 13.614 h |
| June | 31.7°C23.5°C | 23.5°C | 113 | 12.7 | 14.014 h |
| July | 32.8°C24.4°C | 24.4°C | 91 | 12.7 | 13.914 h |
| August, selected | 33.3°C24.5°C | 24.5°C | 98 | 13.2 | 13.213 h |
| September | 30.8°C22.1°C | 22.1°C | 118 | 11.8 | 12.412 h |
| October | 26.8°C17.4°C | 17.4°C | 105 | 8.7 | 11.511 h |
| November | 21.3°C12.1°C | 12.1°C | 103 | 8.3 | 10.711 h |
| December | 17.6°C8.6°C | 8.6°C | 105 | 9.6 | 10.310 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
- Pasadena (Texas), United States in AugustUnited States · 17 kmHigh 33.0°C · Low 24.6°C · 98 mm rain
- Missouri City in AugustUnited States · 23 kmHigh 33.2°C · Low 24.7°C · 94 mm rain
- Pearland in AugustUnited States · 23 kmHigh 32.9°C · Low 24.7°C · 100 mm rain
- Sugar Land in AugustUnited States · 31 kmHigh 33.4°C · Low 24.7°C · 88 mm rain
- Baytown in AugustUnited States · 37 kmHigh 32.6°C · Low 24.6°C · 113 mm rain
- League City in AugustUnited States · 38 kmHigh 32.1°C · Low 25.2°C · 108 mm rain
- Cypress in AugustUnited States · 40 kmHigh 33.9°C · Low 24.5°C · 83 mm rain
- The Woodlands in AugustUnited States · 46 kmHigh 34.0°C · Low 24.3°C · 88 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 Houston) is explained once on the Houston year overview and on the Sources, method and limits page.
Pasadena (Texas), United States lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.