Puerto Rico · 18.47°N 66.11°W · monthly climate normals, judged against the Tropical preset (mean 24–33 °C75–91 °F, anything but the monsoon)
The best time to visit San Juan is March to December, when mean temperatures run from 24 °C75 °F to 27 °C81 °F.
Rain falls year-round, 80–200 mm3.1–7.9 in a month, so there is no dry season to aim for; February is the driest month and August the wettest. The mean temperature barely moves through the year, 24–27 °C75–81 °F, warmest in July.
Figures are 30-year monthly averages (WorldClim 2.1 monthly normals 1970–2000) for the 0.25° grid cell at 18.47, -66.11 — a climate guide, not a forecast.
Pick the weather you like and every month is judged against it — temperature above the month names, rain below.
Good time to go for a Tropical holiday: March to December.
Open San Juan on the interactive map ↗ the same verdict for every place on Earth, any month
Reading the chart. Gold is good: the month fits what you picked. Any other colour names the reason it doesn't — the temperature bar can be too cold or too hot, the rain bar too dry, too rainy or monsoon. A faded gold bar is a half that fits while the other half fails; a gold month name means both fit.
What the verdicts mean. Temperature is the monthly mean, judged against the preset's band (mean 24–33 °C75–91 °F for Tropical). Rain is judged by each month's class within San Juan's own year rather than raw millimetres: dry under 60 mm2.4 in, showers 60–100 mm2.4–3.9 in, rainy from 100 mm3.9 in and 35 % of the wettest month. Too rainy is a rainy-season month the preset doesn't allow. Monsoon is the heaviest kind of rainy season — 180 mm7.1 in or more (120 mm4.7 in near the yearly peak) in a climate whose wettest month is at least three times its driest — so every monsoon month is rainy season too; the label says which kind. Full rules on the method page.
| Month | Rain | Mean | Season | Tropical verdict |
|---|---|---|---|---|
| January | 1124.4 | 2474 | rainy | too cold |
| February | 803.1 | 2474 | showers | too cold |
| March | 883.5 | 2475 | showers | good |
| April | 1204.7 | 2577 | rainy | good |
| May | 1927.6 | 2679 | rainy | good |
| June | 1365.4 | 2780 | rainy | good |
| July | 1686.6 | 2781 | rainy | good |
| August | 2007.9 | 2781 | rainy | good |
| September | 1766.9 | 2781 | rainy | good |
| October | 1847.2 | 2780 | rainy | good |
| November | 1847.2 | 2678 | rainy | good |
| December | 1526.0 | 2475 | rainy | good |
| Looking for | Rule | Months that fit |
|---|---|---|
| Warm | mean 14–24 °C57–75 °F, dry or showers | February |
| Tropical | mean 24–33 °C75–91 °F, anything but the monsoon | March to December |
| Beach | mean 24–33 °C75–91 °F, dry or showers | March |
| Cool | mean 0–14 °C32–57 °F, anything but the monsoon | |
| Snow | mean below 0 °C32 °F, any rain |
Not a distinct one. Rain falls year-round, 80–200 mm3.1–7.9 in a month, so there is no dry season to aim for; February is the driest month and August the wettest.
The mean temperature barely moves through the year, 24–27 °C75–81 °F, warmest in July. Annual rainfall totals about 1,792 mm71 in.
The nearest destinations that do fit the Tropical preset in the months San Juan doesn't:
The interactive map colours the whole world by how it fits your picks in any month, and shows this chart for any place you tap.