Climate averages 1991–2020
San Juan weather
in June.
A hot, moderately wet month: the 3rd warmest and the 5th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
June is a hot month in San Juan: daytime highs average 31.3°C and nights cool to about 24.3°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 68 mm of rain on roughly 14 days, which makes June a moderately wet month (the 5th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 13 h 13 min on an average June day.
The nearest other city in this atlas is Bayamón (9 km away). In June its highs average 31.3°C, about as warm as San Juan, with 60 mm of rain.
Among the 7 cities listed in Puerto Rico, San Juan ranks joint 2nd of 7 for the warmest June highs and joint 4th of 7 for the driest June (rainfall, lowest first). The mean June high of those 7 cities is 30.8°C; San Juan is 0.4°C warmer than that mean.
From June to July, average highs rise by 0.2°C to 31.5°C, and monthly rainfall rises from 68 mm to 80 mm.
The annual picture
June in context
Monthly rainfall
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
San Juan climate table
| Month | Average highHigh / low | Average low | Rainfall mm/month | Rain days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 28.0°C21.5°C | 21.5°C | 39 | 10.4 | 11.211 h |
| February | 28.6°C21.3°C | 21.3°C | 29 | 7.7 | 11.512 h |
| March | 29.3°C21.5°C | 21.5°C | 39 | 8.4 | 12.012 h |
| April | 30.0°C22.3°C | 22.3°C | 72 | 11.0 | 12.613 h |
| May | 30.4°C23.4°C | 23.4°C | 112 | 16.1 | 13.013 h |
| June, selected | 31.3°C24.3°C | 24.3°C | 68 | 13.8 | 13.213 h |
| July | 31.5°C24.6°C | 24.6°C | 80 | 16.4 | 13.113 h |
| August | 31.5°C24.7°C | 24.7°C | 95 | 18.7 | 12.813 h |
| September | 31.2°C24.5°C | 24.5°C | 131 | 20.8 | 12.312 h |
| October | 30.4°C24.1°C | 24.1°C | 124 | 20.5 | 11.712 h |
| November | 28.9°C23.2°C | 23.2°C | 112 | 18.2 | 11.311 h |
| December | 28.1°C22.1°C | 22.1°C | 48 | 12.2 | 11.011 h |
Rainfall is the average of the 30 separate monthly totals. A rain day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
June in nearby cities
- Bayamón in JunePuerto Rico · 9 kmHigh 31.3°C · Low 24.4°C · 60 mm rain
- Carolina in JunePuerto Rico · 18 kmHigh 30.8°C · Low 24.5°C · 68 mm rain
- Caguas in JunePuerto Rico · 27 kmHigh 29.9°C · Low 24.4°C · 99 mm rain
- Arecibo in JunePuerto Rico · 64 kmHigh 31.5°C · Low 24.3°C · 92 mm rain
- Ponce in JunePuerto Rico · 75 kmHigh 29.9°C · Low 24.3°C · 48 mm rain
- Mayagüez in JunePuerto Rico · 113 kmHigh 31.0°C · Low 25.4°C · 47 mm rain
- Punta Cana in JuneDominican Republic · 243 kmHigh 28.5°C · Low 25.8°C · 71 mm rain
- Salvaleón de Higüey in JuneDominican Republic · 275 kmHigh 30.0°C · Low 24.1°C · 66 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for San Juan) is explained once on the San Juan year overview and on the Sources, method and limits page.
Carolina lies in the same rainfall cell, so its rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.