Last updated: June 24, 2025
In May, the average temperature in Keystone Heights, United States reaches a pleasant 24°C (76°F). However, temperatures can fluctuate significantly, with a minimum of 9°C (49°F) and a maximum soaring to 37°C (98°F). During this time, you can expect about 103 mm (4.1 in) of precipitation spread over 10 days, contributing to an average humidity of 68%. Whether you're planning outdoor activities or cozy indoor moments, be prepared for a mix of warm sunshine and refreshing rain!
In May in Keystone Heights, the average temperature is 24°C (76°F). Maximums can reach up to 37°C (98°F), while minimums can dip as low as 9°C (49°F). Be sure to pack for varying weather conditions while enjoying your travels!
In Keystone Heights in May, the precipitation amount is 103 mm (4.1 in) over a span of 10 days.
In Keystone Heights in May humidity is 68%. With an average temperature of 24°C (76°F), this humidity feels like a warm, steamy embrace that makes traveling both invigorating and slightly exhausting, as the air clings to your skin and encourages leisurely breaks in the shade.
In Keystone Heights in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Keystone Heights.
UV Risk Categories
Weather in Keystone Heights varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Keystone Heights, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | 14°C (57°F) | 44 mm (1.7 inches) | 83% | moderate |
| February Weather | 17°C (63°F) | 62 mm (2.5 inches) | 80% | very high |
| March Weather | 18°C (65°F) | 41 mm (1.6 inches) | 75% | very high |
| April Weather | 21°C (70°F) | 81 mm (3.2 inches) | 70% | extreme |
| May Weather | 24°C (76°F) | 103 mm (4.1 inches) | 68% | extreme |
| June Weather | 26°C (80°F) | 163 mm (6.4 inches) | 75% | extreme |
| July Weather | 27°C (81°F) | 190 mm (7.5 inches) | 79% | extreme |
| August Weather | 27°C (81°F) | 177 mm (7.0 inches) | 81% | extreme |
| September Weather | 26°C (80°F) | 133 mm (5.2 inches) | 83% | very high |
| October Weather | 24°C (75°F) | 78 mm (3.1 inches) | 81% | very high |
| November Weather | 18°C (64°F) | 62 mm (2.4 inches) | 82% | high |
| December Weather | 15°C (60°F) | 80 mm (3.1 inches) | 84% | moderate |