Last updated: June 24, 2025
In May, the average temperature in Johnson City, United States reaches a comfortable 14°C (58°F). However, be prepared for temperature fluctuations, with minimums dropping to -3°C (28°F) and maximums soaring to 31°C (88°F). Expect 131 mm (5.1 in) of precipitation spread over 15 days, contributing to a relatively high average humidity of 75%.
In May in Johnson City, the average temperature is 14°C (58°F), with maximums reaching up to 31°C (88°F) and minimums dipping as low as -3°C (28°F). It’s best to pack a variety of clothing to adapt to the fluctuating temperatures while traveling.
In Johnson City in May, the precipitation amount is 131 mm (5.1 in) over a span of 15 days.
In Johnson City in May humidity is 75%. With an average temperature of 14°C (58°F), this humidity feels like a lingering blanket of warmth, making travel both refreshing and a bit stifling, as the moisture in the air may leave you feeling slightly sticky while enjoying outdoor adventures.
In Johnson City in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Johnson City.
UV Risk Categories
Weather in Johnson City varies notably across the year, with each month offering distinct climate conditions. This page compares May’s weather to other months in Johnson City, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -3°C (26°F) | 73 mm (2.9 inches) | 87% | moderate |
| February Weather | -2°C (29°F) | 89 mm (3.5 inches) | 85% | moderate |
| March Weather | 2°C (35°F) | 89 mm (3.5 inches) | 85% | high |
| April Weather | 8°C (47°F) | 120 mm (4.7 inches) | 83% | very high |
| May Weather | 14°C (58°F) | 131 mm (5.1 inches) | 75% | very high |
| June Weather | 19°C (67°F) | 103 mm (4.1 inches) | 73% | very high |
| July Weather | 22°C (72°F) | 121 mm (4.8 inches) | 65% | very high |
| August Weather | 21°C (70°F) | 108 mm (4.2 inches) | 62% | very high |
| September Weather | 17°C (64°F) | 95 mm (3.7 inches) | 66% | very high |
| October Weather | 12°C (54°F) | 135 mm (5.3 inches) | 79% | high |
| November Weather | 4°C (39°F) | 92 mm (3.6 inches) | 87% | moderate |
| December Weather | 0°C (32°F) | 88 mm (3.5 inches) | 85% | low |