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Built 2026-10-19 (19 October 2026)

Guajataca Dam Weather Records (RQC00663904)

Record envelope, standing records and threshold days for Guajataca Dam (RQC00663904), PR, Puerto Rico [United States], with 72 years of record.

Key Facts for Guajataca Dam

  • Guajataca Dam (RQC00663904) is a weather station in PR, Puerto Rico [United States] at 18.40 latitude and -66.92 longitude, 202 m (663 ft) above sea level.
  • The station reports from 1955 to 2026, 72 years of record.
  • 0 records set at Guajataca Dam still stand.
  • Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Guajataca Dam set a monthly record daily precipitation of 94.5 mm (3.7 in) on 16 February 2026.

About the Station

  • Location: PR, Puerto Rico [United States], 18.40 latitude, -66.92 longitude.
  • Elevation: 202 m (663 ft).
  • Period of record: 1955 to 2026, 72 years.
  • Eligible elements: prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Guajataca Dam, with 2026 drawn through them The band shows the record high and record low for each calendar day at Guajataca Dam. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 000111 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Guajataca Dam. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Guajataca Dam, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jann/an/an/an/a
Febn/an/an/an/a
Marn/an/an/an/a
Aprn/an/an/an/a
Mayn/an/an/an/a
Junn/an/an/an/a
Juln/an/an/an/a
Augn/an/an/an/a
Sepn/an/an/an/a
Octn/an/an/an/a
Novn/an/an/an/a
Decn/an/an/an/a

Which Years Hold Standing Records

0 standing records
Standing records at Guajataca Dam by the year they were set 0 records at Guajataca Dam still stand. 00000000000
0 records at Guajataca Dam still stand.
Standing records at Guajataca Dam by the year they were set
Year setStanding records

All-Time Record Progression

1 new records
When Guajataca Dam set new all-time records 1 all-time records were set at Guajataca Dam between 14 May 1995 and 14 May 1995. Each dot is a new record. Record daily precipitation14 May 1995: Record daily precipitation 191.8 mm (7.6 in)1995
1 all-time records were set at Guajataca Dam between 14 May 1995 and 14 May 1995. Each dot is a new record.
When Guajataca Dam set new all-time records
DateKindDetail
1995-05-14Record daily precipitationRecord daily precipitation 191.8 mm (7.6 in)

Wettest Day of Each Month

May: 191.8 mm (7.6 in)
Record daily precipitation for each month at Guajataca Dam The wettest day on record for each calendar month at Guajataca Dam. The most was 191.8 mm (7.6 in) on 14 May 1995. 050100150200 Jan: 119.6 mm (4.7 in), 14 January 2010 Jan Feb: 94.5 mm (3.7 in), 16 February 2026 Feb Mar: 127.0 mm (5.0 in), 24 March 1963 Mar Apr: 118.1 mm (4.6 in), 1 April 2013 Apr May: 191.8 mm (7.6 in), 14 May 1995 May Jun: 142.2 mm (5.6 in), 11 June 1974 Jun Jul: 120.7 mm (4.8 in), 6 July 1990 Jul Aug: 149.4 mm (5.9 in), 14 August 2024 Aug Sep: 152.4 mm (6.0 in), 22 September 1998 Sep Oct: 109.2 mm (4.3 in), 22 October 1972 Oct Nov: 191.5 mm (7.5 in), 27 November 1968 Nov Dec: 152.4 mm (6.0 in), 14 December 1981 Dec
The wettest day on record for each calendar month at Guajataca Dam. The most was 191.8 mm (7.6 in) on 14 May 1995.
Record daily precipitation for each month at Guajataca Dam
MonthRecord daily precipitation (mm)Date
Jan119.6 mm (4.7 in)14 January 2010
Feb94.5 mm (3.7 in)16 February 2026
Mar127.0 mm (5.0 in)24 March 1963
Apr118.1 mm (4.6 in)1 April 2013
May191.8 mm (7.6 in)14 May 1995
Jun142.2 mm (5.6 in)11 June 1974
Jul120.7 mm (4.8 in)6 July 1990
Aug149.4 mm (5.9 in)14 August 2024
Sep152.4 mm (6.0 in)22 September 1998
Oct109.2 mm (4.3 in)22 October 1972
Nov191.5 mm (7.5 in)27 November 1968
Dec152.4 mm (6.0 in)14 December 1981

Latest Records

20
Latest records at Guajataca Dam
DateStationRecordValueBeat old record byOld record stoodSignificance
16 February 2026Guajataca Dam, PRmonthly rain94.5 mm (3.7 in)7.1 mm (0.28 in)58 years39 of 100 (Notable)
21 July 2025Guajataca Dam, PRdaily rain49.3 mm (1.9 in)16.3 mm (0.6 in)62 years36 of 100 (Notable)
9 June 2025Guajataca Dam, PRdaily rain57.2 mm (2.3 in)16.6 mm (0.7 in)51 years32 of 100 (Routine)
4 May 2025Guajataca Dam, PRdaily rain95.0 mm (3.7 in)40.4 mm (1.6 in)12 years30 of 100 (Routine)
14 April 2025Guajataca Dam, PRdaily rain36.8 mm (1.4 in)5.0 mm (0.20 in)15 years13 of 100 (Routine)
12 April 2025Guajataca Dam, PRdaily rain57.4 mm (2.3 in)1.5 mm (0.06 in)44 years20 of 100 (Routine)
5 March 2025Guajataca Dam, PRdaily rain44.7 mm (1.8 in)26.9 mm (1.1 in)6 years23 of 100 (Routine)
15 August 2024Guajataca Dam, PRdaily rain147.3 mm (5.8 in)103.6 mm (4.1 in)6 years48 of 100 (Notable)
14 August 2024Guajataca Dam, PRmonthly rain149.4 mm (5.9 in)32.6 mm (1.3 in)68 years58 of 100 (Notable)
6 June 2024Guajataca Dam, PRdaily rain68.1 mm (2.7 in)9.7 mm (0.38 in)61 years31 of 100 (Routine)
25 April 2024Guajataca Dam, PRdaily rain67.6 mm (2.7 in)17.3 mm (0.7 in)23 years22 of 100 (Routine)
7 February 2024Guajataca Dam, PRdaily rain34.0 mm (1.3 in)7.3 mm (0.29 in)24 years19 of 100 (Routine)
25 January 2024Guajataca Dam, PRdaily rain13.7 mm (0.5 in)6.8 mm (0.27 in)30 years20 of 100 (Routine)
16 December 2023Guajataca Dam, PRdaily rain55.1 mm (2.2 in)31.0 mm (1.2 in)12 years28 of 100 (Routine)
11 November 2022Guajataca Dam, PRdaily rain61.7 mm (2.4 in)3.3 mm (0.13 in)49 years21 of 100 (Routine)
19 September 2022Guajataca Dam, PRdaily rain135.9 mm (5.4 in)52.1 mm (2.1 in)8 years37 of 100 (Notable)
1 March 2022Guajataca Dam, PRdaily rain54.4 mm (2.1 in)15.0 mm (0.6 in)52 years29 of 100 (Routine)
3 February 2022Guajataca Dam, PRdaily rain69.1 mm (2.7 in)32.3 mm (1.3 in)44 years42 of 100 (Notable)
26 July 2021Guajataca Dam, PRdaily rain (Tie)27.7 mm (1.1 in)tie4 years1 of 100 (Routine)
7 April 2021Guajataca Dam, PRdaily rain46.2 mm (1.8 in)33.5 mm (1.3 in)60 years42 of 100 (Notable)

Extremes by Year

1955 to 2026
Yearly extremes at Guajataca Dam: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)191.8 mm (7.6 in)199598.2 mm (3.9 in)72
Wettest five days (Rx5day)408.2 mm (16.1 in)1965159.3 mm (6.3 in)72
Longest dry spell (CDD)44 days197717 days72

Wettest day (Rx1day)

Wettest day (Rx1day) at Guajataca Dam by year The wettest day of the year at Guajataca Dam, 1955 to 2026. The record is 191.8 mm (7.6 in) in 1995, marked on the chart; the median year is 98.2 mm (3.9 in). 0501001502001960198020002020Record: 191.8 mm (7.6 in) in 1995
The wettest day of the year at Guajataca Dam, 1955 to 2026. The record is 191.8 mm (7.6 in) in 1995, marked on the chart; the median year is 98.2 mm (3.9 in).
Wettest day (Rx1day) at Guajataca Dam by year
YearWettest day (Rx1day)
195588.4 mm (3.5 in)
1956116.8 mm (4.6 in)
195761.0 mm (2.4 in)
195871.1 mm (2.8 in)
1959110.5 mm (4.4 in)
1960102.9 mm (4.1 in)
1961116.8 mm (4.6 in)
196299.1 mm (3.9 in)
1963127.0 mm (5.0 in)
196459.7 mm (2.4 in)
1965147.8 mm (5.8 in)
196675.4 mm (3.0 in)
196787.4 mm (3.4 in)
1968191.5 mm (7.5 in)
196973.7 mm (2.9 in)
197098.0 mm (3.9 in)
197199.1 mm (3.9 in)
1972109.2 mm (4.3 in)
197366.0 mm (2.6 in)
1974142.2 mm (5.6 in)
197586.4 mm (3.4 in)
197663.5 mm (2.5 in)
1977101.6 mm (4.0 in)
1978106.7 mm (4.2 in)
1979119.4 mm (4.7 in)
198098.3 mm (3.9 in)
1981152.4 mm (6.0 in)
198263.5 mm (2.5 in)
1983114.3 mm (4.5 in)
198499.1 mm (3.9 in)
198585.9 mm (3.4 in)
198692.7 mm (3.6 in)
198796.5 mm (3.8 in)
198888.9 mm (3.5 in)
198982.6 mm (3.3 in)
1990120.7 mm (4.8 in)
199166.0 mm (2.6 in)
1992131.6 mm (5.2 in)
199397.0 mm (3.8 in)
1994133.6 mm (5.3 in)
1995191.8 mm (7.6 in)
199696.5 mm (3.8 in)
1997102.9 mm (4.1 in)
1998152.4 mm (6.0 in)
1999120.1 mm (4.7 in)
200099.1 mm (3.9 in)
200195.3 mm (3.8 in)
2002109.2 mm (4.3 in)
2003118.6 mm (4.7 in)
2004142.2 mm (5.6 in)
200592.7 mm (3.6 in)
2006139.2 mm (5.5 in)
200762.7 mm (2.5 in)
200871.9 mm (2.8 in)
200964.0 mm (2.5 in)
2010119.6 mm (4.7 in)
2011109.2 mm (4.3 in)
201292.7 mm (3.6 in)
2013118.1 mm (4.6 in)
201483.8 mm (3.3 in)
2015123.2 mm (4.9 in)
201677.2 mm (3.0 in)
201769.9 mm (2.8 in)
201848.5 mm (1.9 in)
201954.4 mm (2.1 in)
202072.1 mm (2.8 in)
202151.6 mm (2.0 in)
2022135.9 mm (5.4 in)
202355.1 mm (2.2 in)
2024149.4 mm (5.9 in)
202595.0 mm (3.7 in)
202694.5 mm (3.7 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Guajataca Dam by year The wettest five days of the year at Guajataca Dam, 1955 to 2026. The record is 408.2 mm (16.1 in) in 1965, marked on the chart; the median year is 159.3 mm (6.3 in). 01002003004005001960198020002020Record: 408.2 mm (16.1 in) in 1965
The wettest five days of the year at Guajataca Dam, 1955 to 2026. The record is 408.2 mm (16.1 in) in 1965, marked on the chart; the median year is 159.3 mm (6.3 in).
Wettest five days (Rx5day) at Guajataca Dam by year
YearWettest five days (Rx5day)
1955146.0 mm (5.7 in)
1956187.2 mm (7.4 in)
195799.6 mm (3.9 in)
1958127.0 mm (5.0 in)
1959161.3 mm (6.4 in)
1960155.0 mm (6.1 in)
1961144.8 mm (5.7 in)
1962214.7 mm (8.5 in)
1963307.3 mm (12.1 in)
1964114.3 mm (4.5 in)
1965408.2 mm (16.1 in)
1966164.3 mm (6.5 in)
1967121.9 mm (4.8 in)
1968306.8 mm (12.1 in)
1969150.7 mm (5.9 in)
1970204.4 mm (8.0 in)
1971134.6 mm (5.3 in)
1972138.1 mm (5.4 in)
1973113.5 mm (4.5 in)
1974187.9 mm (7.4 in)
1975196.9 mm (7.8 in)
1976102.1 mm (4.0 in)
1977159.1 mm (6.3 in)
1978240.5 mm (9.5 in)
1979148.1 mm (5.8 in)
1980154.2 mm (6.1 in)
1981322.9 mm (12.7 in)
1982154.0 mm (6.1 in)
1983153.7 mm (6.1 in)
1984218.7 mm (8.6 in)
1985140.2 mm (5.5 in)
1986246.3 mm (9.7 in)
1987198.1 mm (7.8 in)
1988182.2 mm (7.2 in)
1989144.7 mm (5.7 in)
1990200.7 mm (7.9 in)
1991126.8 mm (5.0 in)
1992168.6 mm (6.6 in)
1993195.8 mm (7.7 in)
1994159.5 mm (6.3 in)
1995284.5 mm (11.2 in)
1996132.6 mm (5.2 in)
1997224.6 mm (8.8 in)
1998183.4 mm (7.2 in)
1999182.1 mm (7.2 in)
2000152.6 mm (6.0 in)
2001163.1 mm (6.4 in)
2002195.1 mm (7.7 in)
2003154.2 mm (6.1 in)
2004218.5 mm (8.6 in)
2005165.6 mm (6.5 in)
2006191.3 mm (7.5 in)
2007158.7 mm (6.2 in)
2008150.7 mm (5.9 in)
2009127.8 mm (5.0 in)
2010197.4 mm (7.8 in)
2011223.0 mm (8.8 in)
2012144.6 mm (5.7 in)
2013171.1 mm (6.7 in)
201466.1 mm (2.6 in)
201553.9 mm (2.1 in)
201690.7 mm (3.6 in)
2017126.8 mm (5.0 in)
201898.7 mm (3.9 in)
2019162.6 mm (6.4 in)
2020103.5 mm (4.1 in)
2021162.6 mm (6.4 in)
2022207.3 mm (8.2 in)
2023116.6 mm (4.6 in)
2024310.4 mm (12.2 in)
2025120.1 mm (4.7 in)
2026122.6 mm (4.8 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Guajataca Dam by year The longest dry spell of the year at Guajataca Dam, 1955 to 2026. The record is 44 days in 1977, marked on the chart; the median year is 17 days. 010203040501960198020002020Record: 44 days in 1977
The longest dry spell of the year at Guajataca Dam, 1955 to 2026. The record is 44 days in 1977, marked on the chart; the median year is 17 days.
Longest dry spell (CDD) at Guajataca Dam by year
YearLongest dry spell (CDD)
195515 days
195617 days
195715 days
195827 days
195920 days
196014 days
196121 days
196220 days
196322 days
196419 days
196516 days
196612 days
196719 days
196814 days
196917 days
197020 days
197113 days
197218 days
197323 days
197434 days
197530 days
197620 days
197744 days
197818 days
197910 days
198018 days
198114 days
198212 days
198321 days
198429 days
198517 days
198620 days
198714 days
198822 days
198937 days
199016 days
199117 days
199218 days
199319 days
199414 days
199525 days
199611 days
199732 days
199813 days
199917 days
200013 days
200118 days
200212 days
200317 days
200413 days
200524 days
200613 days
200715 days
200826 days
200918 days
201014 days
201112 days
201215 days
201311 days
201413 days
20155 days
20165 days
20178 days
201814 days
201913 days
202012 days
202115 days
202218 days
202315 days
202415 days
202514 days
20269 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Rainfall Return Levels

57 years, 1955 to 2025

A day with at least 99.5 mm (3.9 in) of rain is expected about once in 2 years. A day with at least 192.9 mm (7.6 in) of rain is expected about once in 100 years.

Rainfall return levels at Guajataca Dam: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years99.5 mm (3.9 in)
5 years128.0 mm (5.0 in)
10 years145.4 mm (5.7 in)
25 years165.7 mm (6.5 in)
50 years179.8 mm (7.1 in)
100 years192.9 mm (7.6 in)Longer than the 57 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 57 years of values from 1955 to 2025.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 191.8 mm (7.6 in) in 1995; 191.5 mm (7.5 in) in 1968; 152.4 mm (6.0 in) in 1981.

Download the Data

  • Data for Guajataca Dam standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Guajataca Dam threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-12).