Last updated: June 24, 2025
In Houston, United States, the average temperature in May hovers around 15°C (60°F), with temperatures dipping as low as 0°C (32°F) and soaring up to 35°C (95°F). During this month, you can expect approximately 150 mm (5.9 in) of precipitation spread over 14 days, contributing to an average humidity level of 75%. Stay prepared for varying weather conditions!
In May in Houston, the average temperature is 15°C (60°F), with maximums reaching 35°C (95°F) and minimums dropping as low as 0°C (32°F). Be sure to pack layers to accommodate the wide temperature range and enjoy all that Houston has to offer!
In Houston in May, the total precipitation amount is 150 mm (5.9 in), occurring over a span of 14 days.
In Houston in May, humidity is 75%. With an average temperature of 15°C (60°F), this humidity feels like a warm, heavy blanket wrapping around you, making outdoor activities slightly uncomfortable and requiring extra hydration while exploring the sights.
In Houston in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Houston.
UV Risk Categories
Weather in Houston varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Houston, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -7°C (20°F) | 37 mm (1.4 inches) | 84% | moderate |
| February Weather | -6°C (21°F) | 50 mm (2.0 inches) | 85% | moderate |
| March Weather | 2°C (36°F) | 60 mm (2.4 inches) | 84% | moderate |
| April Weather | 7°C (45°F) | 86 mm (3.4 inches) | 83% | very high |
| May Weather | 15°C (60°F) | 150 mm (5.9 inches) | 75% | very high |
| June Weather | 22°C (71°F) | 146 mm (5.7 inches) | 79% | very high |
| July Weather | 23°C (74°F) | 105 mm (4.1 inches) | 75% | very high |
| August Weather | 21°C (71°F) | 116 mm (4.6 inches) | 69% | very high |
| September Weather | 18°C (65°F) | 119 mm (4.7 inches) | 74% | very high |
| October Weather | 10°C (50°F) | 125 mm (4.9 inches) | 79% | moderate |
| November Weather | 2°C (35°F) | 54 mm (2.1 inches) | 88% | moderate |
| December Weather | -3°C (27°F) | 42 mm (1.6 inches) | 82% | low |