Built 2026-10-19 (19 October 2026)

Maunabo Weather Records (RQC00666050)

Record envelope, standing records and threshold days for Maunabo (RQC00666050), PR, Puerto Rico [United States], with 105 years of record.

Key Facts for Maunabo

  • Maunabo (RQC00666050) is a weather station in PR, Puerto Rico [United States] at 18.01 latitude and -65.90 longitude, 15 m (49 ft) above sea level.
  • The station reports from 1899 to 2003, 105 years of record.
  • 1,464 records set at Maunabo still stand.
  • Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Maunabo set a daily record precipitation of 54.9 mm (2.2 in) on 19 April 2003.

About the Station

  • Location: PR, Puerto Rico [United States], 18.01 latitude, -65.90 longitude.
  • Elevation: 15 m (49 ft).
  • Period of record: 1899 to 2003, 105 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 Maunabo, with 2026 drawn through them The band shows the record high and record low for each calendar day at Maunabo. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 10152025303540 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Maunabo. 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 Maunabo, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan35.0 C (95.0 F)15.0 C (59.0 F)n/an/a
Feb35.6 C (96.1 F)15.0 C (59.0 F)n/an/a
Mar37.2 C (99.0 F)13.9 C (57.0 F)n/an/a
Apr35.6 C (96.1 F)16.1 C (61.0 F)n/an/a
May35.0 C (95.0 F)17.2 C (63.0 F)n/an/a
Jun35.6 C (96.1 F)20.0 C (68.0 F)n/an/a
Jul35.0 C (95.0 F)20.6 C (69.1 F)n/an/a
Aug35.6 C (96.1 F)16.7 C (62.1 F)n/an/a
Sep36.7 C (98.1 F)19.4 C (66.9 F)n/an/a
Oct35.6 C (96.1 F)18.9 C (66.0 F)n/an/a
Nov37.2 C (99.0 F)16.1 C (61.0 F)n/an/a
Dec35.0 C (95.0 F)16.1 C (61.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Maunabo by the year they were set 1,464 records at Maunabo still stand. 1900 holds the most, with 315. 01002003004001899: 441900: 3151901: 1381902: 1171903: 1441904: 1571905: 1071906: 11907: 311908: 531909: 951910: 321911: 91913: 351969: 341978: 411979: 821980: 11981: 281899190119031905190719091911196919791981
1,464 records at Maunabo still stand. 1900 holds the most, with 315.
Standing records at Maunabo by the year they were set
Year setStanding records
189944
1900315
1901138
1902117
1903144
1904157
1905107
19061
190731
190853
190995
191032
19119
191335
196934
197841
197982
19801
198128

Wettest Day of Each Month

May: 304.8 mm (12.0 in)
Record daily precipitation for each month at Maunabo The wettest day on record for each calendar month at Maunabo. The most was 304.8 mm (12.0 in) on 2 May 1933. 0100200300400 Jan: 193.0 mm (7.6 in), 6 January 1992 Jan Feb: 110.5 mm (4.4 in), 20 February 1994 Feb Mar: 72.6 mm (2.9 in), 29 March 1985 Mar Apr: 134.1 mm (5.3 in), 18 April 2003 Apr May: 304.8 mm (12.0 in), 2 May 1933 May Jun: 115.6 mm (4.6 in), 1 June 1933 Jun Jul: 152.4 mm (6.0 in), 21 July 1958 Jul Aug: 245.1 mm (9.6 in), 31 August 1979 Aug Sep: 284.5 mm (11.2 in), 8 September 1953 Sep Oct: 160.8 mm (6.3 in), 7 October 1985 Oct Nov: 241.0 mm (9.5 in), 13 November 1909 Nov Dec: 164.6 mm (6.5 in), 2 December 1960 Dec
The wettest day on record for each calendar month at Maunabo. The most was 304.8 mm (12.0 in) on 2 May 1933.
Record daily precipitation for each month at Maunabo
MonthRecord daily precipitation (mm)Date
Jan193.0 mm (7.6 in)6 January 1992
Feb110.5 mm (4.4 in)20 February 1994
Mar72.6 mm (2.9 in)29 March 1985
Apr134.1 mm (5.3 in)18 April 2003
May304.8 mm (12.0 in)2 May 1933
Jun115.6 mm (4.6 in)1 June 1933
Jul152.4 mm (6.0 in)21 July 1958
Aug245.1 mm (9.6 in)31 August 1979
Sep284.5 mm (11.2 in)8 September 1953
Oct160.8 mm (6.3 in)7 October 1985
Nov241.0 mm (9.5 in)13 November 1909
Dec164.6 mm (6.5 in)2 December 1960

Period of Record Coverage

1899 to 1981
Days with data per year at Maunabo 19 years of record at Maunabo, 1899 to 1981. 9 years have data for under 90 percent of days and are left out of rankings: 1899, 1906, 1911, 1913, 1969, 1978, 1979, 1980 and others. 1899: 61 of 365 days1900: 365 of 365 days1901: 351 of 365 days1902: 365 of 365 days1903: 365 of 365 days1904: 365 of 366 days1905: 364 of 365 days1906: 1 of 365 days1907: 365 of 365 days1908: 366 of 366 days1909: 365 of 365 days1910: 364 of 365 days1911: 83 of 365 days1913: 31 of 365 days1969: 30 of 365 days1978: 119 of 365 days1979: 242 of 365 days1980: 31 of 366 days1981: 212 of 365 days1900190519101980
19 years of record at Maunabo, 1899 to 1981. 9 years have data for under 90 percent of days and are left out of rankings: 1899, 1906, 1911, 1913, 1969, 1978, 1979, 1980 and others.
Days with data per year at Maunabo
YearDays with dataShare of yearComplete
18996117%No
1900365100%Yes
190135196%Yes
1902365100%Yes
1903365100%Yes
1904365100%Yes
1905364100%Yes
190610%No
1907365100%Yes
1908366100%Yes
1909365100%Yes
1910364100%Yes
19118323%No
1913318%No
1969308%No
197811933%No
197924266%No
1980318%No
198121258%No

Latest Records

20
Latest records at Maunabo
DateStationRecordValueBeat old record byOld record stoodSignificance
19 April 2003Maunabo, PRdaily rain54.9 mm (2.2 in)4.1 mm (0.16 in)44 years26 of 100 (Routine)
18 April 2003Maunabo, PRmonthly rain134.1 mm (5.3 in)12.2 mm (0.5 in)42 years41 of 100 (Notable)
10 April 2003Maunabo, PRdaily rain50.3 mm (2.0 in)27.4 mm (1.1 in)76 years53 of 100 (Notable)
25 January 2003Maunabo, PRdaily rain42.4 mm (1.7 in)8.9 mm (0.35 in)21 years23 of 100 (Routine)
21 April 2002Maunabo, PRdaily rain61.7 mm (2.4 in)35.8 mm (1.4 in)19 years43 of 100 (Notable)
28 January 2002Maunabo, PRdaily rain15.0 mm (0.6 in)1.3 mm (0.05 in)14 years15 of 100 (Routine)
5 December 2001Maunabo, PRdaily rain43.7 mm (1.7 in)5.1 mm (0.20 in)3 years13 of 100 (Routine)
8 November 2001Maunabo, PRdaily rain143.5 mm (5.6 in)48.8 mm (1.9 in)27 years43 of 100 (Notable)
23 August 2001Maunabo, PRdaily rain155.7 mm (6.1 in)80.8 mm (3.2 in)64 years69 of 100 (Major)
6 May 2001Maunabo, PRdaily rain67.3 mm (2.6 in)2.0 mm (0.08 in)12 years14 of 100 (Routine)
23 March 2001Maunabo, PRdaily rain21.1 mm (0.8 in)7.1 mm (0.28 in)68 years20 of 100 (Routine)
1 December 2000Maunabo, PRdaily rain33.3 mm (1.3 in)4.1 mm (0.16 in)41 years25 of 100 (Routine)
3 October 2000Maunabo, PRdaily rain93.0 mm (3.7 in)51.3 mm (2.0 in)16 years39 of 100 (Notable)
25 March 1999Maunabo, PRdaily rain12.4 mm (0.5 in)3.3 mm (0.13 in)5 years14 of 100 (Routine)
6 December 1998Maunabo, PRdaily rain36.3 mm (1.4 in)5.8 mm (0.23 in)33 years24 of 100 (Routine)
5 December 1998Maunabo, PRdaily rain38.6 mm (1.5 in)5.3 mm (0.21 in)36 years24 of 100 (Routine)
25 August 1998Maunabo, PRdaily rain132.8 mm (5.2 in)63.2 mm (2.5 in)9 years45 of 100 (Notable)
17 April 1998Maunabo, PRdaily rain23.1 mm (0.9 in)10.4 mm (0.4 in)43 years20 of 100 (Routine)
21 March 1998Maunabo, PRdaily rain28.4 mm (1.1 in)10.6 mm (0.4 in)48 years36 of 100 (Notable)
8 January 1998Maunabo, PRdaily rain32.8 mm (1.3 in)5.9 mm (0.23 in)60 years33 of 100 (Routine)

Extremes by Year

1899 to 2003
Yearly extremes at Maunabo: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)37.2 C (99.0 F)197834.4 C (93.9 F)19
Coldest night (TNn)13.9 C (57.0 F)191116.7 C (62.1 F)19
Wettest day (Rx1day)304.8 mm (12.0 in)1933101.6 mm (4.0 in)93
Wettest five days (Rx5day)522.0 mm (20.6 in)1933180.3 mm (7.1 in)92
Longest dry spell (CDD)61 days189916 days92

Hottest day (TXx)

Hottest day (TXx) at Maunabo by year The hottest day of the year at Maunabo, 1899 to 2003. The record is 37.2 C (99.0 F) in 1978, marked on the chart; the median year is 34.4 C (93.9 F). 27.53032.53537.5190019201940196019802000Record: 37.2 C (99.0 F) in 1978
The hottest day of the year at Maunabo, 1899 to 2003. The record is 37.2 C (99.0 F) in 1978, marked on the chart; the median year is 34.4 C (93.9 F).
Hottest day (TXx) at Maunabo by year
YearHottest day (TXx)
189932.8 C (91.0 F)
190032.2 C (90.0 F)
190133.9 C (93.0 F)
190235.6 C (96.1 F)
190335.6 C (96.1 F)
190434.4 C (93.9 F)
190535.0 C (95.0 F)
190628.3 C (82.9 F)
190734.4 C (93.9 F)
190835.0 C (95.0 F)
190935.0 C (95.0 F)
191034.4 C (93.9 F)
191132.2 C (90.0 F)
1912n/a
191328.9 C (84.0 F)
1915n/a
1923n/a
1924n/a
1925n/a
1926n/a
1927n/a
1928n/a
1929n/a
1930n/a
1931n/a
1932n/a
1933n/a
1934n/a
1935n/a
1936n/a
1937n/a
1939n/a
1940n/a
1941n/a
1942n/a
1943n/a
1944n/a
1945n/a
1947n/a
1948n/a
1949n/a
1950n/a
1952n/a
1953n/a
1954n/a
1955n/a
1957n/a
1958n/a
1959n/a
1960n/a
1961n/a
1962n/a
1963n/a
1964n/a
1965n/a
1966n/a
1967n/a
1968n/a
196935.6 C (96.1 F)
1970n/a
1971n/a
1972n/a
1973n/a
1974n/a
1975n/a
1976n/a
1977n/a
197837.2 C (99.0 F)
197937.2 C (99.0 F)
198030.0 C (86.0 F)
198134.4 C (93.9 F)
1982n/a
1983n/a
1984n/a
1985n/a
1986n/a
1987n/a
1988n/a
1989n/a
1990n/a
1991n/a
1992n/a
1993n/a
1994n/a
1995n/a
1996n/a
1997n/a
1998n/a
1999n/a
2000n/a
2001n/a
2002n/a
2003n/a

Coldest night (TNn)

Coldest night (TNn) at Maunabo by year The coldest night of the year at Maunabo, 1899 to 2003. The record is 13.9 C (57.0 F) in 1911, marked on the chart; the median year is 16.7 C (62.1 F). 10152025190019201940196019802000Record: 13.9 C (57.0 F) in 1911
The coldest night of the year at Maunabo, 1899 to 2003. The record is 13.9 C (57.0 F) in 1911, marked on the chart; the median year is 16.7 C (62.1 F).
Coldest night (TNn) at Maunabo by year
YearColdest night (TNn)
189917.2 C (63.0 F)
190019.4 C (66.9 F)
190120.0 C (68.0 F)
190218.3 C (64.9 F)
190315.0 C (59.0 F)
190415.6 C (60.1 F)
190515.0 C (59.0 F)
190623.3 C (73.9 F)
190715.0 C (59.0 F)
190816.7 C (62.1 F)
190915.0 C (59.0 F)
191015.6 C (60.1 F)
191113.9 C (57.0 F)
1912n/a
191316.1 C (61.0 F)
1915n/a
1923n/a
1924n/a
1925n/a
1926n/a
1927n/a
1928n/a
1929n/a
1930n/a
1931n/a
1932n/a
1933n/a
1934n/a
1935n/a
1936n/a
1937n/a
1939n/a
1940n/a
1941n/a
1942n/a
1943n/a
1944n/a
1945n/a
1947n/a
1948n/a
1949n/a
1950n/a
1952n/a
1953n/a
1954n/a
1955n/a
1957n/a
1958n/a
1959n/a
1960n/a
1961n/a
1962n/a
1963n/a
1964n/a
1965n/a
1966n/a
1967n/a
1968n/a
196924.4 C (75.9 F)
1970n/a
1971n/a
1972n/a
1973n/a
1974n/a
1975n/a
1976n/a
1977n/a
197817.8 C (64.0 F)
197916.7 C (62.1 F)
198017.2 C (63.0 F)
198115.6 C (60.1 F)
1982n/a
1983n/a
1984n/a
1985n/a
1986n/a
1987n/a
1988n/a
1989n/a
1990n/a
1991n/a
1992n/a
1993n/a
1994n/a
1995n/a
1996n/a
1997n/a
1998n/a
1999n/a
2000n/a
2001n/a
2002n/a
2003n/a

Wettest day (Rx1day)

Wettest day (Rx1day) at Maunabo by year The wettest day of the year at Maunabo, 1899 to 2003. The record is 304.8 mm (12.0 in) in 1933, marked on the chart; the median year is 101.6 mm (4.0 in). 0100200300400190019201940196019802000Record: 304.8 mm (12.0 in) in 1933
The wettest day of the year at Maunabo, 1899 to 2003. The record is 304.8 mm (12.0 in) in 1933, marked on the chart; the median year is 101.6 mm (4.0 in).
Wettest day (Rx1day) at Maunabo by year
YearWettest day (Rx1day)
189910.9 mm (0.4 in)
190066.0 mm (2.6 in)
190163.5 mm (2.5 in)
1902108.0 mm (4.3 in)
190366.0 mm (2.6 in)
1904121.9 mm (4.8 in)
1905119.4 mm (4.7 in)
190627.9 mm (1.1 in)
190743.4 mm (1.7 in)
190873.4 mm (2.9 in)
1909241.0 mm (9.5 in)
1910266.7 mm (10.5 in)
1911121.9 mm (4.8 in)
1912137.2 mm (5.4 in)
191379.8 mm (3.1 in)
191564.8 mm (2.6 in)
1923101.6 mm (4.0 in)
1924132.1 mm (5.2 in)
1925121.9 mm (4.8 in)
1926101.6 mm (4.0 in)
1927154.7 mm (6.1 in)
1928100.3 mm (3.9 in)
1929101.6 mm (4.0 in)
193066.0 mm (2.6 in)
193183.8 mm (3.3 in)
1932166.4 mm (6.6 in)
1933304.8 mm (12.0 in)
1934106.4 mm (4.2 in)
193589.4 mm (3.5 in)
1936161.5 mm (6.4 in)
1937117.1 mm (4.6 in)
193947.5 mm (1.9 in)
194089.4 mm (3.5 in)
1941114.3 mm (4.5 in)
194288.9 mm (3.5 in)
194362.2 mm (2.4 in)
1944139.7 mm (5.5 in)
1945208.3 mm (8.2 in)
194730.0 mm (1.2 in)
194878.7 mm (3.1 in)
1949127.0 mm (5.0 in)
195071.6 mm (2.8 in)
1952136.4 mm (5.4 in)
1953284.5 mm (11.2 in)
1954126.0 mm (5.0 in)
195584.8 mm (3.3 in)
195763.5 mm (2.5 in)
1958152.4 mm (6.0 in)
195978.7 mm (3.1 in)
1960164.6 mm (6.5 in)
1961204.5 mm (8.1 in)
1962108.0 mm (4.3 in)
1963104.9 mm (4.1 in)
196486.1 mm (3.4 in)
196540.6 mm (1.6 in)
196676.2 mm (3.0 in)
196731.0 mm (1.2 in)
196896.5 mm (3.8 in)
1969102.9 mm (4.1 in)
1970131.3 mm (5.2 in)
197156.4 mm (2.2 in)
197268.6 mm (2.7 in)
197385.1 mm (3.4 in)
1974133.4 mm (5.3 in)
1975203.2 mm (8.0 in)
197662.5 mm (2.5 in)
197719.1 mm (0.8 in)
1978121.4 mm (4.8 in)
1979245.1 mm (9.6 in)
198050.3 mm (2.0 in)
198161.5 mm (2.4 in)
198283.1 mm (3.3 in)
198394.0 mm (3.7 in)
1984116.3 mm (4.6 in)
1985160.8 mm (6.3 in)
198687.1 mm (3.4 in)
1987137.2 mm (5.4 in)
1988107.7 mm (4.2 in)
1989100.1 mm (3.9 in)
199071.9 mm (2.8 in)
1991106.2 mm (4.2 in)
1992193.0 mm (7.6 in)
1993144.5 mm (5.7 in)
1994110.5 mm (4.4 in)
199577.2 mm (3.0 in)
1996216.7 mm (8.5 in)
1997139.4 mm (5.5 in)
1998132.8 mm (5.2 in)
199961.0 mm (2.4 in)
200099.1 mm (3.9 in)
2001155.7 mm (6.1 in)
200261.7 mm (2.4 in)
2003134.1 mm (5.3 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Maunabo by year The wettest five days of the year at Maunabo, 1899 to 2003. The record is 522.0 mm (20.6 in) in 1933, marked on the chart; the median year is 180.3 mm (7.1 in). 0200400600190019201940196019802000Record: 522.0 mm (20.6 in) in 1933
The wettest five days of the year at Maunabo, 1899 to 2003. The record is 522.0 mm (20.6 in) in 1933, marked on the chart; the median year is 180.3 mm (7.1 in).
Wettest five days (Rx5day) at Maunabo by year
YearWettest five days (Rx5day)
189922.5 mm (0.9 in)
1900135.9 mm (5.4 in)
1901125.2 mm (4.9 in)
1902243.8 mm (9.6 in)
1903179.3 mm (7.1 in)
1904396.3 mm (15.6 in)
1905207.1 mm (8.2 in)
1906n/a
190778.4 mm (3.1 in)
1908125.5 mm (4.9 in)
1909333.0 mm (13.1 in)
1910316.0 mm (12.4 in)
1911219.7 mm (8.6 in)
1912200.9 mm (7.9 in)
1913107.9 mm (4.2 in)
1915223.5 mm (8.8 in)
1923175.3 mm (6.9 in)
1924297.1 mm (11.7 in)
1925160.1 mm (6.3 in)
1926164.2 mm (6.5 in)
1927352.3 mm (13.9 in)
1928105.4 mm (4.1 in)
1929156.2 mm (6.1 in)
1930161.3 mm (6.4 in)
1931214.1 mm (8.4 in)
1932230.0 mm (9.1 in)
1933522.0 mm (20.6 in)
1934160.8 mm (6.3 in)
1935191.5 mm (7.5 in)
1936370.9 mm (14.6 in)
1937414.5 mm (16.3 in)
193978.7 mm (3.1 in)
1940195.3 mm (7.7 in)
1941171.5 mm (6.8 in)
1942198.6 mm (7.8 in)
1943146.2 mm (5.8 in)
1944280.7 mm (11.1 in)
1945238.2 mm (9.4 in)
194754.3 mm (2.1 in)
1948179.8 mm (7.1 in)
1949211.6 mm (8.3 in)
1950155.9 mm (6.1 in)
1952288.8 mm (11.4 in)
1953297.7 mm (11.7 in)
1954326.6 mm (12.9 in)
1955119.6 mm (4.7 in)
1957129.6 mm (5.1 in)
1958209.6 mm (8.3 in)
1959251.2 mm (9.9 in)
1960354.8 mm (14.0 in)
1961239.3 mm (9.4 in)
1962176.5 mm (6.9 in)
1963159.0 mm (6.3 in)
1964197.1 mm (7.8 in)
196569.4 mm (2.7 in)
1966152.4 mm (6.0 in)
196756.6 mm (2.2 in)
1968180.8 mm (7.1 in)
1969148.6 mm (5.9 in)
1970381.0 mm (15.0 in)
1971115.0 mm (4.5 in)
1972154.5 mm (6.1 in)
1973192.2 mm (7.6 in)
1974240.3 mm (9.5 in)
1975262.4 mm (10.3 in)
1976101.5 mm (4.0 in)
197745.0 mm (1.8 in)
1978351.8 mm (13.9 in)
1979312.6 mm (12.3 in)
198088.3 mm (3.5 in)
1981163.3 mm (6.4 in)
1982139.7 mm (5.5 in)
1983144.5 mm (5.7 in)
1984372.3 mm (14.7 in)
1985252.8 mm (10.0 in)
1986156.9 mm (6.2 in)
1987389.2 mm (15.3 in)
1988172.2 mm (6.8 in)
1989130.8 mm (5.1 in)
1990197.6 mm (7.8 in)
1991152.1 mm (6.0 in)
1992215.9 mm (8.5 in)
1993238.0 mm (9.4 in)
1994156.3 mm (6.2 in)
1995127.3 mm (5.0 in)
1996448.2 mm (17.6 in)
1997216.7 mm (8.5 in)
1998198.9 mm (7.8 in)
1999123.8 mm (4.9 in)
2000133.9 mm (5.3 in)
2001173.3 mm (6.8 in)
200293.5 mm (3.7 in)
2003217.8 mm (8.6 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Maunabo by year The longest dry spell of the year at Maunabo, 1899 to 2003. The record is 61 days in 1899, marked on the chart; the median year is 16 days. 020406080190019201940196019802000Record: 61 days in 1899
The longest dry spell of the year at Maunabo, 1899 to 2003. The record is 61 days in 1899, marked on the chart; the median year is 16 days.
Longest dry spell (CDD) at Maunabo by year
YearLongest dry spell (CDD)
189961 days
190019 days
190120 days
190229 days
19032 days
190416 days
190517 days
1906n/a
190714 days
190814 days
190919 days
191011 days
191116 days
19129 days
191314 days
191527 days
192311 days
192413 days
192523 days
192615 days
192716 days
192813 days
192915 days
193043 days
193124 days
193217 days
193315 days
193412 days
193513 days
193616 days
193710 days
193913 days
194010 days
194117 days
194218 days
194314 days
194423 days
194535 days
194711 days
194818 days
194920 days
195017 days
195240 days
195336 days
195416 days
195526 days
195718 days
195834 days
195921 days
196017 days
196119 days
196214 days
196348 days
196418 days
19658 days
196622 days
196748 days
196814 days
196927 days
197023 days
197114 days
197212 days
197320 days
197430 days
197518 days
197621 days
197716 days
19789 days
197912 days
198016 days
198114 days
198211 days
198312 days
198411 days
198526 days
198612 days
198717 days
198811 days
198911 days
199010 days
199115 days
199223 days
199316 days
199417 days
199521 days
199612 days
199713 days
199812 days
199924 days
200017 days
200113 days
200213 days
20039 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

69 years, 1900 to 2002

A day with at least 109.4 mm (4.3 in) of rain is expected about once in 2 years. A day with at least 323.4 mm (12.7 in) of rain is expected about once in 100 years.

Rainfall return levels at Maunabo: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years109.4 mm (4.3 in)
5 years160.1 mm (6.3 in)
10 years196.1 mm (7.7 in)
25 years244.8 mm (9.6 in)
50 years283.2 mm (11.1 in)
100 years323.4 mm (12.7 in)Longer than the 69 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, 69 years of values from 1900 to 2002.

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: 304.8 mm (12.0 in) in 1933; 284.5 mm (11.2 in) in 1953; 266.7 mm (10.5 in) in 1910.

Download the Data

  • Data for Maunabo standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Maunabo 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 (2025-12-31).