Last updated: June 24, 2025
In San Juan, United States, the average temperature in June hovers around 21°C (70°F), with a range that can dip to a chilly 4°C (39°F) or rise to a sweltering 36°C (97°F). Expect some light precipitation, averaging 15 mm (0.6 in) over about 3 days, and enjoy a comfortable average humidity of 55%.
In June in San Juan, the average temperature is 21°C (70°F). Maximum temperatures can reach 36°C (97°F), while minimums can drop to as low as 4°C (39°F). This diverse temperature range makes San Juan an ideal destination for travelers looking to enjoy both warm days and cooler evenings.
In San Juan in June, the precipitation amount is 15 mm (0.6 in) over the course of 3 days.
In San Juan in June humidity is 55%. With average temperature 21°C (70°F), this humidity feels like a refreshing embrace, making it comfortable for traveling as long as you stay hydrated and take in the sights at a leisurely pace.
In San Juan in June, the maximum UV index reaches 13, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's crucial to take protective measures. For detailed information, you can check the Hourly UV Index in San Juan.
UV Risk Categories
Weather in San Juan varies notably across the year, with each month offering distinct climate conditions. This page compares June’s weather to other months in San Juan, focusing on differences in temperature, rainfall, humidity, and UV levels.
| Temperature | Precipitation | Humidity | UV | |
|---|---|---|---|---|
| January Weather | -2°C (29°F) | 24 mm (0.9 inches) | 78% | moderate |
| February Weather | 0°C (33°F) | 24 mm (0.9 inches) | 79% | very high |
| March Weather | 6°C (43°F) | 24 mm (1.0 inches) | 66% | very high |
| April Weather | 11°C (51°F) | 22 mm (0.9 inches) | 60% | extreme |
| May Weather | 16°C (60°F) | 18 mm (0.7 inches) | 57% | extreme |
| June Weather | 21°C (70°F) | 15 mm (0.6 inches) | 55% | extreme |
| July Weather | 22°C (73°F) | 34 mm (1.3 inches) | 56% | extreme |
| August Weather | 21°C (71°F) | 23 mm (0.9 inches) | 65% | extreme |
| September Weather | 18°C (65°F) | 27 mm (1.0 inches) | 72% | extreme |
| October Weather | 11°C (52°F) | 27 mm (1.1 inches) | 78% | very high |
| November Weather | 5°C (41°F) | 23 mm (0.9 inches) | 81% | high |
| December Weather | 0°C (32°F) | 19 mm (0.7 inches) | 79% | moderate |