Houston Climate by Month – Rainy Season, Temperature Averages
Summary
The climate figures for Houston are averaged from 2016–2025 observations (10 years). Annual rainfall averages about 1,920 mm.
The rainy season runs January–December. The wettest month is May with 234.6 mm across 16 rain days; the driest is February at just 104.3 mm.
The hottest month is August (average high 33°C) and the coolest is January (16.8°C).
The most comfortable time to visit Houston is February — less rain and milder heat.
Monthly averages · 2016–2025
| Monthly averages | High | Low | Rainfall | Rainy season |
|---|---|---|---|---|
| January | 16.8° | 7.4° | 149 mm | 12 |
| February | 19.7° | 10.1° | 104 mm | 12 |
| March | 23.1° | 14.0° | 131 mm | 15 |
| April | 25.6° | 16.4° | 163 mm | 14 |
| May | 29.0° | 20.7° | 235 mm | 16 |
| June | 31.8° | 23.8° | 189 mm | 17 |
| July | 32.6° | 24.7° | 191 mm | 18 |
| August | 33.0° | 25.0° | 192 mm | 18 |
| September | 31.0° | 22.8° | 182 mm | 14 |
| October | 27.5° | 18.1° | 124 mm | 10 |
| November | 22.2° | 13.1° | 107 mm | 11 |
| December | 19.1° | 10.2° | 154 mm | 11 |