Home › Cities › Puerto Rico › San Juan › Tools › Weather extremes
Weather extremes
How extreme does San Juan's weather get?
The hottest, coldest, wettest and snowiest days San Juan has recorded — the outer limits of what its weather can do, and how far they sit beyond a normal day.
The four kinds of extreme
The hottest, coldest, wettest and snowiest single days San Juan has recorded — each shown against what a normal day that time of year looks like.
That is about 9°F hotter than a normal October afternoon in San Juan (typical high near 89°F).
The three most extreme on record
About 9°F colder than a normal January night in San Juan (typical low near 72°F).
The three most extreme on record
More rain in a single day than San Juan usually gets in the whole month of July (typical July total about 6.0 in).
The three most extreme on record
How hot and cold it gets, month by month
The shaded band is the normal range of daily temperatures for each month. The dots show the most extreme it has ever been — so you can see how far beyond a normal day the records really sit.
San Juan's record heat sits well above even a hot day for the season — October's 98°F is about 9°F beyond a normal hot afternoon. Its record cold is just as far below a normal winter night — the dots mark how rare each extreme really is.
In plain terms
Methodology & sources
Temperature & precipitation — 1991–2020 normals computed from 30 years of daily observations at San Juan L M Marin Intl AP, a weather station, about 11 km from the city centre. The underlying daily records come from NOAA's global station network.