Houston weather in May
May in Houston: hot, soaked, with very humid — a good time to visit.
#8 of 12 months in Houston · #480 of 604 destinations to visit in May · comfort 68/100 (tier C)
Updated June 2026 · climate normals from ERA5 reanalysis
Houston climate normals — May
| Daytime high | 29°C / 85°F | 🥵 hot |
|---|---|---|
| Nighttime low | 21°C / 70°F | |
| Feels like (high) | 32°C / 90°F | |
| Rainfall | 164 mm / 6.5 in | ⛈ soaked |
| Rainy days | 14 days | |
| Humidity | 77% | 💦 very humid |
| Dew point | 21°C / 69°F | |
| Sunshine | 10.4 h/day | |
| Daylight | 13.7 h | |
| Wind | 19 km/h / 12 mph | |
| Air quality (US AQI) | 58 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Houston in May — FAQ
- Is May a good time to visit Houston?
- May in Houston: hot, soaked, with very humid — a good time to visit. It ranks #8 of 12 months for Houston on SeasonMap's comfort score (68/100).
- What is the weather like in Houston in May?
- In May, Houston averages a daily high of 29.2°C and a low of 21.1°C, with about 164.4 mm of rain over roughly 14.2 rainy days.
- What is the air quality in Houston in May?
- Houston has a mean US Air Quality Index of about 58 in May.