Weather in San Juan
What's the weather like in San Juan?
San Juan has warm year-round and moderate rainfall spread across the year. Average daytime highs range from 28°C (82°F) in January to 31°C (88°F) in July, with overnight lows around 21°C (70°F) and 25°C (77°F) respectively.
For comfortable sightseeing temperatures (18–26°C daytime highs), the best months to visit San Juan are January through February.
Quick facts
- Country
- 🇵🇷 Puerto Rico
- Region
- Caribbean
- Time zone
- America/Puerto_Rico
- Coordinates
- 18.465, -66.106
Monthly climate
Long-run averages for each month of the year.
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 28°C / 82°F | 21°C / 70°F | 75 mm | 11 | — |
| February | 28°C / 82°F | 21°C / 70°F | 55 mm | 9 | — |
| March | 29°C / 84°F | 22°C / 72°F | 55 mm | 9 | — |
| April | 29°C / 84°F | 23°C / 73°F | 110 mm | 11 | — |
| May | 30°C / 86°F | 24°C / 75°F | 155 mm | 14 | — |
| June | 31°C / 88°F | 25°C / 77°F | 130 mm | 14 | — |
| July | 31°C / 88°F | 25°C / 77°F | 150 mm | 16 | — |
| August | 32°C / 90°F | 25°C / 77°F | 165 mm | 16 | — |
| September | 31°C / 88°F | 25°C / 77°F | 145 mm | 15 | — |
| October | 31°C / 88°F | 24°C / 75°F | 130 mm | 13 | — |
| November | 30°C / 86°F | 23°C / 73°F | 140 mm | 13 | — |
| December | 29°C / 84°F | 22°C / 72°F | 110 mm | 12 | — |
San Juan by month
Detailed weather for any specific month:
Seasonal patterns to know
Atlantic hurricane season runs June–November (peak August–October). Tropical storms and hurricanes are possible — peak risk is August–October.
Cities with a similar climate to San Juan
Frequently asked questions
When is the best time to visit San Juan?
The most comfortable months in San Juan are usually January, February, March, when average highs sit near 18–26°C (64–79°F) with relatively little rain. See the full month-by-month breakdown for the exact figures.
What is the hottest month in San Juan?
August is typically the hottest month in San Juan, averaging a high of 32°C (90°F).
What is the coldest month in San Juan?
January is usually the coldest, with average lows around 21°C (70°F).
Does it snow in San Juan?
Snow is rare in San Juan; the climate data shows essentially no snowfall across the year.
Live forecast, sunrise/sunset, and more.