Last updated: June 18, 2025
In May, the average temperature in Houston, Canada hovers around 8°C (46°F). This month brings a wide temperature range, with lows dipping to -6°C (22°F) and highs reaching a pleasant 24°C (76°F). Rain is expected, with an average precipitation of 64 mm (2.5 in) over approximately 12 days. Moreover, the air will feel quite humid, with an average humidity level of 88%.
In May in Houston, the average temperature is 8°C (46°F). The maximum can reach 24°C (76°F), while the minimum can drop as low as -6°C (22°F). Be prepared for a wide range of temperatures when traveling during this month.
In Houston in May, the total precipitation amount is 64 mm (2.5 in) over the course of 12 days.
In Houston in May, humidity is 88%. With an average temperature of 8°C (46°F), this humidity feels like a damp chill that seeps into your bones, making outdoor exploration feel much more uncomfortable than the temperature alone would suggest.
In Houston in May, the maximum UV index is 7, which corresponds to the high Exposure Category. This means that the time to burn is approximately 25 minutes. For more 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 | -8°C (17°F) | 78 mm (3.1 inches) | 96% | low |
| February Weather | -9°C (16°F) | 57 mm (2.2 inches) | 94% | low |
| March Weather | -3°C (27°F) | 57 mm (2.3 inches) | 93% | moderate |
| April Weather | 1°C (34°F) | 40 mm (1.6 inches) | 91% | moderate |
| May Weather | 8°C (46°F) | 64 mm (2.5 inches) | 88% | high |
| June Weather | 11°C (52°F) | 68 mm (2.7 inches) | 84% | high |
| July Weather | 13°C (56°F) | 72 mm (2.8 inches) | 87% | very high |
| August Weather | 13°C (56°F) | 52 mm (2.1 inches) | 88% | high |
| September Weather | 8°C (48°F) | 93 mm (3.7 inches) | 91% | high |
| October Weather | 2°C (36°F) | 101 mm (4.0 inches) | 95% | moderate |
| November Weather | -2°C (29°F) | 117 mm (4.6 inches) | 98% | low |
| December Weather | -8°C (18°F) | 67 mm (2.6 inches) | 98% | low |