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San Juan May Weather

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

Typical San Juan May Weather 1991–2020
Average daily high	87.5 °F
Average daily low	75.7 °F
Average monthly precipitation	5.5 inches
Average monthly snow	none
Daily chance of precipitation	53.3%
Daily chance of snow	0%

San Juan May Weather Records 1956–2024
Highest temperature	96 °F	May 11, 1980
Lowest temperature	66 °F	May 5, 1962
Highest daily low	80 °F	May 22, 2020
Lowest daily high	76 °F	May 23, 2004
Hottest average high temperature	91.1 °F	2020
Coldest average high temperature	84.1 °F	1965
Most daily precipitation	4.5 inches	May 13, 1986
Most monthly precipitation	15.0 inches	1965
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
May 1	86.8	74.8	94	69
May 2	86.9	74.9	95	68
May 3	86.9	74.9	95	69
May 4	87.0	75.0	95	68
May 5	87.0	75.1	96	66
May 6	87.1	75.1	95	67
May 7	87.1	75.2	94	68
May 8	87.2	75.3	94	69
May 9	87.2	75.3	94	70
May 10	87.3	75.4	95	69
May 11	87.3	75.4	96	69
May 12	87.4	75.5	94	70
May 13	87.4	75.5	93	69
May 14	87.4	75.6	93	69
May 15	87.4	75.7	93	70
May 16	87.5	75.7	93	68
May 17	87.6	75.8	93	69
May 18	87.6	75.8	94	67
May 19	87.7	75.9	95	71
May 20	87.8	75.9	92	68
May 21	87.9	76.0	95	69
May 22	88.0	76.1	94	69
May 23	88.1	76.2	95	70
May 24	88.1	76.2	95	71
May 25	88.2	76.3	94	70
May 26	88.3	76.3	94	71
May 27	88.4	76.4	95	69
May 28	88.4	76.4	93	71
May 29	88.5	76.5	94	69
May 30	88.5	76.5	94	69
May 31	88.6	76.6	93	69

Weather Station Details

Years	Station	Coordinates
1956–2024	San Juan Airport	location