Temperature
Hot by day, warm at night.
Hot afternoons and some sun. Hurricane risk and humid air are the main drawbacks.
Hot by day, warm at night.
Rain is frequent, but usually comes in brief, on-and-off spells. About 16 wet days, more than in most months.
Cloudier spells limit sunshine.
Very humid air is a major factor this month.
In July, afternoons feel about 89° and nights feel near 85°.
Partly cloudy skies this month.
July's typical breeze keeps the air from feeling as stagnant.
July late afternoons are around 86°F, easing to about 82°F in early evening.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% | Sea°F |
|---|---|---|---|---|---|---|---|
| Jan | 82 | 73 | 1.5 | 10 | 10.9 | 79 | 80 |
| Feb | 82 | 73 | 1.2 | 9 | 11.0 | 77 | 80 |
| Mar | 83 | 73 | 1.6 | 9 | 11.2 | 76 | 80 |
| Apr | 84 | 75 | 3.0 | 12 | 11.9 | 78 | 80 |
| May | 85 | 76 | 4.0 | 15 | 11.8 | 80 | 82 |
| Jun | 87 | 78 | 2.4 | 13 | 12.3 | 79 | 83 |
| Jul | 87 | 79 | 2.7 | 16 | 12.3 | 79 | 83 |
| Aug | 87 | 79 | 3.4 | 19 | 11.7 | 81 | 84 |
| Sep | 87 | 79 | 5.2 | 21 | 10.7 | 82 | 85 |
| Oct | 86 | 78 | 4.8 | 20 | 10.5 | 83 | 85 |
| Nov | 84 | 76 | 4.2 | 18 | 10.2 | 83 | 83 |
| Dec | 82 | 75 | 1.9 | 13 | 10.6 | 81 | 82 |
Similar climates
Want a side-by-side climate view? Compare San Juan with Havana.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Jun 1, 2026
Data & methodology