San Juan Average Temperature by Month

This page shows the average temperature in each month of the year in San Juan, Puerto Rico. It is based on NOAA data for the years 1991–2020.
What's the Hottest Month in San Juan?
In San Juan, Puerto Rico, the warmest month is August, with an average daily high temperature of 89.2 °F and an average low of 77.8 °F.
What's the Coldest Month in San Juan?
In San Juan, Puerto Rico, the coolest month is January, with an average daily high temperature of 83.4 °F and an average low of 71.9 °F.
Month Avg. High Avg. Low
January 83.4 °F 71.9 °F
February 83.9 °F 71.7 °F
March 84.8 °F 72.4 °F
April 86.3 °F 74.0 °F
May 87.5 °F 75.7 °F
June 89.1 °F 77.3 °F
July 88.8 °F 77.6 °F
August 89.2 °F 77.8 °F
September 89.3 °F 77.5 °F
October 88.6 °F 76.8 °F
November 86.2 °F 74.9 °F
December 84.3 °F 73.3 °F
Year 86.8 °F 75.1 °F
Weather Station Details
Years Station Coordinates
1956–2024 San Juan Airport location
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