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Rainfall/ Precipitation in San Juan, Puerto Rico

  • San Juan is given on average 1628 mm (64.1 in) of rainfall per year, or 135.7 mm (5.3 in) per month.
  • On average there are 204 days per year with more than 0.1 mm (0.004 in) of rainfall (precipitation) or 17 days with a quantity of rain, sleet, snow etc. per month.
  • The driest weather is in March when an average of 56 mm (2.2 in) of rainfall (precipitation) occurs.
  • The wettest weather is in May & August when an average of 181 mm (7.1 in) of rainfall (precipitation) occurs.

Precipitation Table

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Annual
rainfall iconAverage Precipitation mm (in) 119 (4.69) 71 (2.8) 56 (2.2) 94 (3.7) 181 (7.1) 144 (5.7) 159 (6.3) 181 (7.1) 172 (6.8) 148 (5.8) 165 (6.5) 138 (5.4) 1628 (64.1)
rainwater catchment iconPrecipitation Litres/m (Gallons/ft) 119 (2.92) 71 (1.74) 56 (1.37) 94 (2.31) 181 (4.44) 144 (3.53) 159 (3.9) 181 (4.44) 172 (4.22) 148 (3.63) 165 (4.05) 138 (3.38) 1628 (39.93)
rain days iconNumber of Wet Days (probability of rain on a day) 17 (55%) 13 (46%) 11 (35%) 14 (47%) 19 (61%) 18 (60%) 21 (68%) 19 (61%) 18 (60%) 17 (55%) 18 (60%) 19 (61%)   204 (56%)
sunny or cloudy iconPercentage of Sunny (Cloudy) Daylight Hours 67 (33) 61 (39) 74 (26) 66 (34) 62 (38) 56 (44) 65 (35) 68 (32) 57 (43) 65 (35) 61 (39) 60 (40)   65 (35)





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Precipitation Nearby San Juan, Puerto Rico

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