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San Juan August Weather

Averages and records for weather in San Juan, Puerto Rico in the month of August.

Typical San Juan August Weather 1991–2020
Average daily high	89.2 °F
Average daily low	77.8 °F
Average monthly precipitation	6.3 inches
Average monthly snow	none
Daily chance of precipitation	63.9%
Daily chance of snow	0%

San Juan August Weather Records 1956–2024
Highest temperature	97 °F	August 21, 1980
Lowest temperature	70 °F	August 26, 1956
Highest daily low	83 °F	August 15, 2023
Lowest daily high	78 °F	August 24, 1988
Hottest average high temperature	91.8 °F	1980
Coldest average high temperature	86.5 °F	1977
Most daily precipitation	5.8 inches	August 22, 2011
Most monthly precipitation	18.6 inches	2011
Most daily snow	none	-
Most monthly snow	none	-

Note: Daily averages are a moving average which includes 14 days before and after

Day	Average (°F)		Record (°F)
Day	High	Low	High	Low
August 1	89.0	77.8	93	72
August 2	89.0	77.9	94	71
August 3	89.0	77.9	95	71
August 4	89.1	77.9	93	73
August 5	89.1	77.9	94	71
August 6	89.1	77.9	93	72
August 7	89.1	77.9	92	72
August 8	89.1	77.8	94	74
August 9	89.1	77.8	95	73
August 10	89.1	77.8	94	73
August 11	89.1	77.8	92	72
August 12	89.1	77.8	93	72
August 13	89.1	77.8	93	71
August 14	89.1	77.8	94	71
August 15	89.1	77.8	94	73
August 16	89.2	77.8	93	73
August 17	89.2	77.8	93	73
August 18	89.2	77.8	94	72
August 19	89.3	77.8	93	73
August 20	89.3	77.8	96	72
August 21	89.3	77.8	97	72
August 22	89.2	77.8	93	72
August 23	89.2	77.7	96	71
August 24	89.2	77.7	96	70
August 25	89.2	77.7	93	72
August 26	89.2	77.7	95	70
August 27	89.2	77.7	95	72
August 28	89.2	77.7	95	71
August 29	89.2	77.7	94	71
August 30	89.2	77.7	95	73
August 31	89.2	77.7	94	72

Weather Station Details

Years	Station	Coordinates
1956–2024	San Juan Airport	location