COOP & ASOS Sites Precipitation Percentiles

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National Weather Service — San Juan, Puerto Rico

Puerto Rico & U.S. Virgin Islands Precipitation Percentile Status

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Selection Date: Uses the latest station report on or before the selected date, when no more than 4 days old.

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Precipitation Percentile Categories

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Categories compare accumulated precipitation ending on each station's latest available report with the historical distribution for the same calendar ending date and accumulation period.

Exceptionally dry: At or below P2. Extremely dry: P2–P5. Severely dry: P5–P10. Moderately dry: P10–P20. Slightly dry: P20–P30.
Normal: P30–P70. Slightly wet: P70–P80. Moderately wet: P80–P90. Very wet: P90–P95. Extremely wet: P95–P98. Exceptionally wet: At or above P98.
Not ranked / unavailable: Fewer than 30 valid historical years are available for that calendar date/window, or recent precipitation data are unavailable.

Source: NOAA Regional Climate Centers / Applied Climate Information System (ACIS). Disclaimer: Data are preliminary and may contain errors. For official climate records, please refer to NOAA/NCEI.

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