🇵🇷 Weather in San Juan

San Juan sits at approximately 18.5° north latitude, which generally produces a tropical or sub-tropical climate, with relatively warm temperatures year-round and distinct wet and dry seasons rather than a clear summer–winter cycle. Local geography (coast vs. inland, altitude, prevailing winds) shapes the specific weather patterns shown in the forecast above.

Climatically, the best time to visit San Juan is generally the local dry season — typically the cooler months of the year for that latitude — when humidity and rainfall are at their lowest. Exact timing depends on what you're after — fewer crowds, specific events, lowest rainfall, or warmest weather. Check the forecast above before planning a short trip.

In the Northern Hemisphere, summer falls in June–August and winter in December–February. Spring runs March–May and autumn runs September–November. San Juan follows this Northern/Southern Hemisphere pattern based on its latitude. See the sun page for exact daylight hours through the year.