Houston, Texas weather in May

Averages from 2021–2025 (155 days of record).

Average high: 85°F
Average low: 70°F
Rainy days: ~17 per month
Total precipitation: 9.9 in
Warmest recorded: 95°F
Coldest recorded: 56°F

Expect May days in Houston, Texas to top out around 85°F and cool to about 70°F overnight, with roughly 17 days of measurable rain across the month. In recent years May has ranged from 56°F to 95°F.

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Current Houston, Texas forecast → · Historical data by Open-Meteo (ERA5).