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Built 2026-10-19 (19 October 2026)

San Lorenzo 1SW Weather Records (RQC00668815)

Record envelope, standing records and threshold days for San Lorenzo 1SW (RQC00668815), PR, Puerto Rico [United States], with 61 years of record.

Key Facts for San Lorenzo 1SW

  • San Lorenzo 1SW (RQC00668815) is a weather station in PR, Puerto Rico [United States] at 18.18 latitude and -65.97 longitude, 113 m (372 ft) above sea level.
  • The station reports from 1966 to 2026, 61 years of record.
  • 0 records set at San Lorenzo 1SW still stand.
  • Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • San Lorenzo 1SW set a daily record precipitation of 31.8 mm (1.3 in) on 1 September 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

  • Location: PR, Puerto Rico [United States], 18.18 latitude, -65.97 longitude.
  • Elevation: 113 m (372 ft).
  • Period of record: 1966 to 2026, 61 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 San Lorenzo 1SW, with 2026 drawn through them The band shows the record high and record low for each calendar day at San Lorenzo 1SW. 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 San Lorenzo 1SW. 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 San Lorenzo 1SW, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
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Which Years Hold Standing Records

0 standing records
Standing records at San Lorenzo 1SW by the year they were set 0 records at San Lorenzo 1SW still stand. 00000000000
0 records at San Lorenzo 1SW still stand.
Standing records at San Lorenzo 1SW by the year they were set
Year setStanding records

Wettest Day of Each Month

Aug: 343.4 mm (13.5 in)
Record daily precipitation for each month at San Lorenzo 1SW The wettest day on record for each calendar month at San Lorenzo 1SW. The most was 343.4 mm (13.5 in) on 31 August 1979. 0100200300400 Jan: 142.2 mm (5.6 in), 5 January 1992 Jan Feb: 76.2 mm (3.0 in), 7 February 2022 Feb Mar: 129.8 mm (5.1 in), 8 March 1998 Mar Apr: 180.3 mm (7.1 in), 29 April 2019 Apr May: 199.6 mm (7.9 in), 18 May 1985 May Jun: 118.1 mm (4.6 in), 17 June 1970 Jun Jul: 226.8 mm (8.9 in), 30 July 2020 Jul Aug: 343.4 mm (13.5 in), 31 August 1979 Aug Sep: 315.0 mm (12.4 in), 22 September 1998 Sep Oct: 271.8 mm (10.7 in), 9 October 1970 Oct Nov: 280.4 mm (11.0 in), 27 November 1987 Nov Dec: 147.6 mm (5.8 in), 10 December 1975 Dec
The wettest day on record for each calendar month at San Lorenzo 1SW. The most was 343.4 mm (13.5 in) on 31 August 1979.
Record daily precipitation for each month at San Lorenzo 1SW
MonthRecord daily precipitation (mm)Date
Jan142.2 mm (5.6 in)5 January 1992
Feb76.2 mm (3.0 in)7 February 2022
Mar129.8 mm (5.1 in)8 March 1998
Apr180.3 mm (7.1 in)29 April 2019
May199.6 mm (7.9 in)18 May 1985
Jun118.1 mm (4.6 in)17 June 1970
Jul226.8 mm (8.9 in)30 July 2020
Aug343.4 mm (13.5 in)31 August 1979
Sep315.0 mm (12.4 in)22 September 1998
Oct271.8 mm (10.7 in)9 October 1970
Nov280.4 mm (11.0 in)27 November 1987
Dec147.6 mm (5.8 in)10 December 1975

Latest Records

20
Latest records at San Lorenzo 1SW
DateStationRecordValueBeat old record byOld record stoodSignificance
1 September 2026San Lorenzo 1SW, PRdaily rain (Provisional)31.8 mm (1.3 in)3.9 mm (0.15 in)24 years14 of 100 (Routine)
31 January 2026San Lorenzo 1SW, PRdaily rain15.2 mm (0.6 in)2.5 mm (0.10 in)24 years16 of 100 (Routine)
15 March 2025San Lorenzo 1SW, PRdaily rain14.0 mm (0.6 in)0.3 mm (0.01 in)28 years14 of 100 (Routine)
14 March 2025San Lorenzo 1SW, PRdaily rain50.3 mm (2.0 in)24.1 mm (0.9 in)35 years42 of 100 (Notable)
27 February 2025San Lorenzo 1SW, PRdaily rain (Tie)40.6 mm (1.6 in)tie57 years5 of 100 (Routine)
17 November 2024San Lorenzo 1SW, PRdaily rain91.4 mm (3.6 in)19.3 mm (0.8 in)36 years25 of 100 (Routine)
14 August 2024San Lorenzo 1SW, PRdaily rain102.9 mm (4.1 in)23.1 mm (0.9 in)19 years22 of 100 (Routine)
1 August 2024San Lorenzo 1SW, PRdaily rain30.5 mm (1.2 in)6.1 mm (0.24 in)45 years21 of 100 (Routine)
3 June 2024San Lorenzo 1SW, PRdaily rain92.7 mm (3.6 in)34.0 mm (1.3 in)29 years39 of 100 (Notable)
20 April 2024San Lorenzo 1SW, PRdaily rain55.9 mm (2.2 in)3.8 mm (0.15 in)22 years13 of 100 (Routine)
13 April 2024San Lorenzo 1SW, PRdaily rain24.6 mm (1.0 in)4.3 mm (0.17 in)12 years11 of 100 (Routine)
26 March 2024San Lorenzo 1SW, PRdaily rain44.7 mm (1.8 in)26.7 mm (1.1 in)46 years47 of 100 (Notable)
29 June 2023San Lorenzo 1SW, PRdaily rain62.2 mm (2.4 in)20.5 mm (0.8 in)12 years23 of 100 (Routine)
17 March 2023San Lorenzo 1SW, PRdaily rain22.9 mm (0.9 in)1.6 mm (0.06 in)36 years17 of 100 (Routine)
15 November 2022San Lorenzo 1SW, PRdaily rain74.4 mm (2.9 in)19.0 mm (0.7 in)17 years20 of 100 (Routine)
3 July 2022San Lorenzo 1SW, PRdaily rain129.5 mm (5.1 in)64.0 mm (2.5 in)23 years51 of 100 (Notable)
7 February 2022San Lorenzo 1SW, PRmonthly rain76.2 mm (3.0 in)4.3 mm (0.17 in)37 years32 of 100 (Routine)
6 February 2022San Lorenzo 1SW, PRdaily rain44.7 mm (1.8 in)15.0 mm (0.6 in)31 years36 of 100 (Notable)
27 June 2021San Lorenzo 1SW, PRdaily rain55.9 mm (2.2 in)26.9 mm (1.1 in)6 years27 of 100 (Routine)
8 June 2021San Lorenzo 1SW, PRdaily rain47.2 mm (1.9 in)24.6 mm (1.0 in)36 years35 of 100 (Notable)

Extremes by Year

1966 to 2026
Yearly extremes at San Lorenzo 1SW: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Wettest day (Rx1day)343.4 mm (13.5 in)1979116.8 mm (4.6 in)61
Wettest five days (Rx5day)712.2 mm (28.0 in)1970201.4 mm (7.9 in)61
Longest dry spell (CDD)30 days19709 days61

Wettest day (Rx1day)

Wettest day (Rx1day) at San Lorenzo 1SW by year The wettest day of the year at San Lorenzo 1SW, 1966 to 2026. The record is 343.4 mm (13.5 in) in 1979, marked on the chart; the median year is 116.8 mm (4.6 in). 0100200300400197019801990200020102020Record: 343.4 mm (13.5 in) in 1979
The wettest day of the year at San Lorenzo 1SW, 1966 to 2026. The record is 343.4 mm (13.5 in) in 1979, marked on the chart; the median year is 116.8 mm (4.6 in).
Wettest day (Rx1day) at San Lorenzo 1SW by year
YearWettest day (Rx1day)
196650.8 mm (2.0 in)
196738.1 mm (1.5 in)
196840.6 mm (1.6 in)
1969167.6 mm (6.6 in)
1970271.8 mm (10.7 in)
197188.1 mm (3.5 in)
197274.4 mm (2.9 in)
197359.4 mm (2.3 in)
1974110.2 mm (4.3 in)
1975158.0 mm (6.2 in)
1976120.9 mm (4.8 in)
1977191.5 mm (7.5 in)
197894.0 mm (3.7 in)
1979343.4 mm (13.5 in)
1980122.9 mm (4.8 in)
1981117.3 mm (4.6 in)
198294.5 mm (3.7 in)
1983151.1 mm (5.9 in)
198490.9 mm (3.6 in)
1985199.6 mm (7.9 in)
1986109.0 mm (4.3 in)
1987280.4 mm (11.0 in)
1988129.0 mm (5.1 in)
1989101.1 mm (4.0 in)
199087.4 mm (3.4 in)
1991117.6 mm (4.6 in)
1992142.2 mm (5.6 in)
199391.9 mm (3.6 in)
1994166.1 mm (6.5 in)
199577.7 mm (3.1 in)
1996291.6 mm (11.5 in)
1997192.8 mm (7.6 in)
1998315.0 mm (12.4 in)
1999107.7 mm (4.2 in)
2000185.9 mm (7.3 in)
2001189.2 mm (7.4 in)
200268.6 mm (2.7 in)
2003135.1 mm (5.3 in)
2004246.4 mm (9.7 in)
2005119.4 mm (4.7 in)
200698.6 mm (3.9 in)
2007156.5 mm (6.2 in)
2008116.8 mm (4.6 in)
2009161.0 mm (6.3 in)
201078.7 mm (3.1 in)
2011162.6 mm (6.4 in)
201285.1 mm (3.4 in)
2013116.1 mm (4.6 in)
2014165.6 mm (6.5 in)
201585.3 mm (3.4 in)
201660.5 mm (2.4 in)
2017108.2 mm (4.3 in)
201862.5 mm (2.5 in)
2019180.3 mm (7.1 in)
2020226.8 mm (8.9 in)
202155.9 mm (2.2 in)
2022129.5 mm (5.1 in)
202362.2 mm (2.4 in)
2024102.9 mm (4.1 in)
202553.8 mm (2.1 in)
202646.0 mm (1.8 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at San Lorenzo 1SW by year The wettest five days of the year at San Lorenzo 1SW, 1966 to 2026. The record is 712.2 mm (28.0 in) in 1970, marked on the chart; the median year is 201.4 mm (7.9 in). 0200400600800197019801990200020102020Record: 712.2 mm (28.0 in) in 1970
The wettest five days of the year at San Lorenzo 1SW, 1966 to 2026. The record is 712.2 mm (28.0 in) in 1970, marked on the chart; the median year is 201.4 mm (7.9 in).
Wettest five days (Rx5day) at San Lorenzo 1SW by year
YearWettest five days (Rx5day)
1966111.2 mm (4.4 in)
196783.3 mm (3.3 in)
196850.2 mm (2.0 in)
1969309.8 mm (12.2 in)
1970712.2 mm (28.0 in)
1971132.3 mm (5.2 in)
1972129.0 mm (5.1 in)
197390.5 mm (3.6 in)
1974253.7 mm (10.0 in)
1975261.1 mm (10.3 in)
1976176.1 mm (6.9 in)
1977358.2 mm (14.1 in)
1978302.3 mm (11.9 in)
1979435.4 mm (17.1 in)
1980182.2 mm (7.2 in)
1981214.1 mm (8.4 in)
1982172.3 mm (6.8 in)
1983265.2 mm (10.4 in)
1984303.1 mm (11.9 in)
1985403.2 mm (15.9 in)
1986201.8 mm (7.9 in)
1987583.1 mm (23.0 in)
1988186.9 mm (7.4 in)
1989161.1 mm (6.3 in)
1990148.1 mm (5.8 in)
1991201.4 mm (7.9 in)
1992209.3 mm (8.2 in)
1993157.2 mm (6.2 in)
1994222.5 mm (8.8 in)
1995124.0 mm (4.9 in)
1996531.9 mm (20.9 in)
1997252.7 mm (9.9 in)
1998347.2 mm (13.7 in)
1999190.8 mm (7.5 in)
2000226.9 mm (8.9 in)
2001207.2 mm (8.2 in)
2002124.0 mm (4.9 in)
2003236.2 mm (9.3 in)
2004418.4 mm (16.5 in)
2005239.7 mm (9.4 in)
2006201.5 mm (7.9 in)
2007347.3 mm (13.7 in)
2008200.2 mm (7.9 in)
2009193.1 mm (7.6 in)
2010224.8 mm (8.9 in)
2011404.9 mm (15.9 in)
2012187.6 mm (7.4 in)
2013173.6 mm (6.8 in)
2014196.0 mm (7.7 in)
2015300.3 mm (11.8 in)
2016174.7 mm (6.9 in)
2017287.1 mm (11.3 in)
2018133.6 mm (5.3 in)
2019191.7 mm (7.5 in)
2020234.4 mm (9.2 in)
2021135.7 mm (5.3 in)
2022176.5 mm (6.9 in)
2023113.0 mm (4.4 in)
2024151.8 mm (6.0 in)
202589.1 mm (3.5 in)
202682.6 mm (3.3 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at San Lorenzo 1SW by year The longest dry spell of the year at San Lorenzo 1SW, 1966 to 2026. The record is 30 days in 1970, marked on the chart; the median year is 9 days. 0102030197019801990200020102020Record: 30 days in 1970
The longest dry spell of the year at San Lorenzo 1SW, 1966 to 2026. The record is 30 days in 1970, marked on the chart; the median year is 9 days.
Longest dry spell (CDD) at San Lorenzo 1SW by year
YearLongest dry spell (CDD)
196615 days
196712 days
196811 days
196916 days
197030 days
197112 days
197211 days
19738 days
19748 days
197511 days
19765 days
19778 days
19787 days
197922 days
198017 days
19818 days
19827 days
19839 days
19849 days
19856 days
19868 days
19879 days
19888 days
198915 days
199011 days
19916 days
19926 days
19938 days
199412 days
199518 days
19968 days
199713 days
19988 days
199928 days
200010 days
200111 days
20027 days
20038 days
200410 days
200513 days
20067 days
20078 days
200810 days
20095 days
20106 days
20117 days
20125 days
20135 days
20147 days
201514 days
20165 days
20174 days
20184 days
201911 days
202017 days
202123 days
202210 days
202312 days
202412 days
202511 days
202619 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

45 years, 1970 to 2016

A day with at least 128.3 mm (5.1 in) of rain is expected about once in 2 years. A day with at least 426.7 mm (16.8 in) of rain is expected about once in 100 years.

Rainfall return levels at San Lorenzo 1SW: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years128.3 mm (5.1 in)
5 years186.2 mm (7.3 in)
10 years232.1 mm (9.1 in)
25 years300.3 mm (11.8 in)
50 years359.5 mm (14.2 in)Longer than the 45 years of record
100 years426.7 mm (16.8 in)Longer than the 45 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, 45 years of values from 1970 to 2016.

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: 343.4 mm (13.5 in) in 1979; 315.0 mm (12.4 in) in 1998; 291.6 mm (11.5 in) in 1996.

Download the Data

  • Data for San Lorenzo 1SW standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for San Lorenzo 1SW 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 (2026-10-17).