San Juan , Puerto Rico: Annual Weather Averages

June is the hottest month in San Juan with an average temperature of 28°C (82°F) and the coldest is January at 25°C (77°F) with the most daily sunshine hours at 9 in October. The wettest month is November with an average of 157mm of rain. The best month to swim in the sea is in August when the average sea temperature is 29°C (84°F).

Average Temperature: San Juan

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  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 25 25 26 26 27 28 28 28 28 27 26 26
°F 77 77 79 79 81 82 82 82 82 81 79 79

Average High/Low Temperature: San Juan

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  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
High °C 27 27 28 28 29 29 29 30 30 30 29 28
Low °C 21 22 22 22 23 24 24 24 24 24 23 22
High °F 81 81 82 82 84 84 84 86 86 86 84 82
Low °F 70 72 72 72 73 75 75 75 75 75 73 72

Average Rainfall: San Juan

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  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
mm 89 69 76 94 149 149 129 152 139 152 157 144
Days 17 13 12 13 17 15 19 19 17 17 18 19

Average Daily Sunshine Hours: San Juan

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  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Hours 8 8 9 9 8 9 9 9 9 9 8 8

Average Sea Temperature: San Juan

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  Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
°C 27 26 26 27 27 28 28 29 29 29 28 27
°F 81 79 79 81 81 82 82 84 84 84 82 81

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