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San Sebastian 2 WNW Weather Records (RQC00668881)

Record envelope, standing records and threshold days for San Sebastian 2 WNW (RQC00668881), PR, Puerto Rico [United States], with 43 years of record.

Key Facts for San Sebastian 2 WNW

  • San Sebastian 2 WNW (RQC00668881) is a weather station in PR, Puerto Rico [United States] at 18.35 latitude and -67.01 longitude, 52 m (170 ft) above sea level.
  • The station reports from 1955 to 1997, 43 years of record.
  • 1,464 records set at San Sebastian 2 WNW still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • San Sebastian 2 WNW set a daily record high maximum temperature of 34.4 C (93.9 F) on 31 October 1997.

About the Station

  • Location: PR, Puerto Rico [United States], 18.35 latitude, -67.01 longitude.
  • Elevation: 52 m (170 ft).
  • Period of record: 1955 to 1997, 43 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at San Sebastian 2 WNW, with 2026 drawn through them The band shows the record high and record low for each calendar day at San Sebastian 2 WNW. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 010203040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at San Sebastian 2 WNW. 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 Sebastian 2 WNW, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan35.0 C (95.0 F)4.4 C (39.9 F)n/an/a
Feb35.0 C (95.0 F)8.3 C (46.9 F)n/an/a
Mar35.0 C (95.0 F)10.0 C (50.0 F)n/an/a
Apr35.6 C (96.1 F)10.6 C (51.1 F)n/an/a
May36.7 C (98.1 F)13.9 C (57.0 F)n/an/a
Jun36.1 C (97.0 F)15.0 C (59.0 F)n/an/a
Jul36.7 C (98.1 F)11.7 C (53.1 F)n/an/a
Aug36.7 C (98.1 F)15.6 C (60.1 F)n/an/a
Sep36.1 C (97.0 F)13.3 C (55.9 F)n/an/a
Oct36.1 C (97.0 F)12.8 C (55.0 F)n/an/a
Nov35.0 C (95.0 F)11.1 C (52.0 F)n/an/a
Dec33.9 C (93.0 F)10.6 C (51.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at San Sebastian 2 WNW by the year they were set 1,464 records at San Sebastian 2 WNW still stand. 1965 holds the most, with 97. 02550751001964: 31965: 971966: 821967: 701968: 601969: 521970: 571971: 481972: 731973: 751974: 651975: 561976: 611977: 221978: 251979: 651980: 911981: 661982: 211983: 341984: 171985: 211986: 81987: 671988: 231989: 131990: 221991: 211992: 221993: 181994: 221995: 371996: 171997: 33196419681972197619801984198819921996
1,464 records at San Sebastian 2 WNW still stand. 1965 holds the most, with 97.
Standing records at San Sebastian 2 WNW by the year they were set
Year setStanding records
19643
196597
196682
196770
196860
196952
197057
197148
197273
197375
197465
197556
197661
197722
197825
197965
198091
198166
198221
198334
198417
198521
19868
198767
198823
198913
199022
199121
199222
199318
199422
199537
199617
199733

Wettest Day of Each Month

Aug: 174.5 mm (6.9 in)
Record daily precipitation for each month at San Sebastian 2 WNW The wettest day on record for each calendar month at San Sebastian 2 WNW. The most was 174.5 mm (6.9 in) on 12 August 1956. 050100150200 Jan: 102.6 mm (4.0 in), 22 January 1997 Jan Feb: 93.0 mm (3.7 in), 16 February 1981 Feb Mar: 111.3 mm (4.4 in), 21 March 1985 Mar Apr: 109.5 mm (4.3 in), 8 April 1987 Apr May: 144.8 mm (5.7 in), 28 May 1980 May Jun: 101.6 mm (4.0 in), 25 June 1955 Jun Jul: 111.8 mm (4.4 in), 19 July 1968 Jul Aug: 174.5 mm (6.9 in), 12 August 1956 Aug Sep: 137.2 mm (5.4 in), 16 September 1975 Sep Oct: 102.1 mm (4.0 in), 7 October 1985 Oct Nov: 121.9 mm (4.8 in), 4 November 1965 Nov Dec: 116.8 mm (4.6 in), 10 December 1965 Dec
The wettest day on record for each calendar month at San Sebastian 2 WNW. The most was 174.5 mm (6.9 in) on 12 August 1956.
Record daily precipitation for each month at San Sebastian 2 WNW
MonthRecord daily precipitation (mm)Date
Jan102.6 mm (4.0 in)22 January 1997
Feb93.0 mm (3.7 in)16 February 1981
Mar111.3 mm (4.4 in)21 March 1985
Apr109.5 mm (4.3 in)8 April 1987
May144.8 mm (5.7 in)28 May 1980
Jun101.6 mm (4.0 in)25 June 1955
Jul111.8 mm (4.4 in)19 July 1968
Aug174.5 mm (6.9 in)12 August 1956
Sep137.2 mm (5.4 in)16 September 1975
Oct102.1 mm (4.0 in)7 October 1985
Nov121.9 mm (4.8 in)4 November 1965
Dec116.8 mm (4.6 in)10 December 1965

Period of Record Coverage

1964 to 1997
Days with data per year at San Sebastian 2 WNW 34 years of record at San Sebastian 2 WNW, 1964 to 1997. 6 years have data for under 90 percent of days and are left out of rankings: 1964, 1972, 1973, 1980, 1985, 1997. 1964: 3 of 366 days1965: 358 of 365 days1966: 358 of 365 days1967: 364 of 365 days1968: 366 of 366 days1969: 337 of 365 days1970: 329 of 365 days1971: 357 of 365 days1972: 318 of 366 days1973: 267 of 365 days1974: 362 of 365 days1975: 351 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 335 of 365 days1979: 363 of 365 days1980: 274 of 366 days1981: 335 of 365 days1982: 347 of 365 days1983: 339 of 365 days1984: 355 of 366 days1985: 327 of 365 days1986: 339 of 365 days1987: 333 of 365 days1988: 349 of 366 days1989: 355 of 365 days1990: 355 of 365 days1991: 365 of 365 days1992: 362 of 366 days1993: 364 of 365 days1994: 364 of 365 days1995: 361 of 365 days1996: 359 of 366 days1997: 263 of 365 days1965197019751980198519901995
34 years of record at San Sebastian 2 WNW, 1964 to 1997. 6 years have data for under 90 percent of days and are left out of rankings: 1964, 1972, 1973, 1980, 1985, 1997.
Days with data per year at San Sebastian 2 WNW
YearDays with dataShare of yearComplete
196431%No
196535898%Yes
196635898%Yes
1967364100%Yes
1968366100%Yes
196933792%Yes
197032990%Yes
197135798%Yes
197231887%No
197326773%No
197436299%Yes
197535196%Yes
1976366100%Yes
1977365100%Yes
197833592%Yes
197936399%Yes
198027475%No
198133592%Yes
198234795%Yes
198333993%Yes
198435597%Yes
198532790%No
198633993%Yes
198733391%Yes
198834995%Yes
198935597%Yes
199035597%Yes
1991365100%Yes
199236299%Yes
1993364100%Yes
1994364100%Yes
199536199%Yes
199635998%Yes
199726372%No

Latest Records

20
Latest records at San Sebastian 2 WNW
DateStationRecordValueBeat old record byOld record stoodSignificance
31 October 1997San Sebastian 2 WNW, PRdaily high max34.4 C (93.9 F)0.5 C (0.9 F)18 years13 of 100 (Routine)
30 October 1997San Sebastian 2 WNW, PRdaily high max35.0 C (95.0 F)0.6 C (1.1 F)18 years14 of 100 (Routine)
29 October 1997San Sebastian 2 WNW, PRdaily high max34.4 C (93.9 F)0.5 C (0.9 F)28 years16 of 100 (Routine)
28 October 1997San Sebastian 2 WNW, PRdaily high max (Tie)34.4 C (93.9 F)tie16 years2 of 100 (Routine)
25 October 1997San Sebastian 2 WNW, PRdaily high max (Tie)34.4 C (93.9 F)tie15 years1 of 100 (Routine)
24 October 1997San Sebastian 2 WNW, PRdaily high max35.0 C (95.0 F)0.6 C (1.1 F)28 years17 of 100 (Routine)
23 October 1997San Sebastian 2 WNW, PRdaily high max (Tie)34.4 C (93.9 F)tie16 years2 of 100 (Routine)
22 October 1997San Sebastian 2 WNW, PRdaily high max35.0 C (95.0 F)0.6 C (1.1 F)16 years14 of 100 (Routine)
22 October 1997San Sebastian 2 WNW, PRdaily high min21.7 C (71.1 F)0.6 C (1.1 F)22 years13 of 100 (Routine)
17 October 1997San Sebastian 2 WNW, PRdaily high min (Tie)21.1 C (70.0 F)tie7 years1 of 100 (Routine)
16 October 1997San Sebastian 2 WNW, PRdaily low max30.0 C (86.0 F)1.7 C (3.1 F)26 years27 of 100 (Routine)
16 October 1997San Sebastian 2 WNW, PRdaily high min22.8 C (73.0 F)1.1 C (2.0 F)7 years14 of 100 (Routine)
15 October 1997San Sebastian 2 WNW, PRmonthly high min23.9 C (75.0 F)1.1 C (2.0 F)22 years28 of 100 (Routine)
14 October 1997San Sebastian 2 WNW, PRdaily high min (Tie)21.1 C (70.0 F)tie16 years2 of 100 (Routine)
7 October 1997San Sebastian 2 WNW, PRdaily high min21.7 C (71.1 F)0.6 C (1.1 F)27 years15 of 100 (Routine)
3 October 1997San Sebastian 2 WNW, PRdaily high max (Tie)34.4 C (93.9 F)tie28 years2 of 100 (Routine)
12 September 1997San Sebastian 2 WNW, PRdaily high max (Tie)35.0 C (95.0 F)tie18 years2 of 100 (Routine)
8 September 1997San Sebastian 2 WNW, PRdaily high max35.0 C (95.0 F)0.6 C (1.1 F)28 years16 of 100 (Routine)
8 September 1997San Sebastian 2 WNW, PRdaily high min (Tie)22.2 C (72.0 F)tie2 years0 of 100 (Routine)
3 September 1997San Sebastian 2 WNW, PRdaily high min (Tie)21.1 C (70.0 F)tie24 years2 of 100 (Routine)

Climate Trend

22 complete years, 1965 to 1996
Annual mean temperature at San Sebastian 2 WNW as warming stripes, 1965 to 1996 One stripe for each of 22 complete years at San Sebastian 2 WNW, 1965 to 1996. Blue stripes are years cooler than the station's own mean of 25.2 C (77.4 F); red stripes are warmer. The coolest year was 1968, at 24.2 C (75.6 F), and the warmest was 1995, at 26.2 C (79.1 F). The strongest colour marks a difference of 1.0 C (1.8 F). 1965: 24.3 C, -0.9 C from the station mean1966: 24.7 C, -0.5 C from the station mean1967: 24.3 C, -1.0 C from the station mean1968: 24.2 C, -1.0 C from the station mean1970: 24.9 C, -0.3 C from the station mean1974: 24.8 C, -0.5 C from the station mean1976: 24.7 C, -0.5 C from the station mean1977: 25.3 C, +0.1 C from the station mean1979: 25.5 C, +0.3 C from the station mean1983: 25.6 C, +0.4 C from the station mean1984: 24.9 C, -0.3 C from the station mean1985: 25.1 C, -0.1 C from the station mean1986: 25.2 C, 0.0 C from the station mean1988: 25.7 C, +0.5 C from the station mean1989: 25.3 C, +0.1 C from the station mean1990: 25.5 C, +0.2 C from the station mean1991: 25.5 C, +0.3 C from the station mean1992: 25.6 C, +0.4 C from the station mean1993: 25.8 C, +0.6 C from the station mean1994: 25.9 C, +0.7 C from the station mean1995: 26.2 C, +0.9 C from the station mean1996: 26.0 C, +0.8 C from the station mean1965197019751980198519901995
One stripe for each of 22 complete years at San Sebastian 2 WNW, 1965 to 1996. Blue stripes are years cooler than the station's own mean of 25.2 C (77.4 F); red stripes are warmer. The coolest year was 1968, at 24.2 C (75.6 F), and the warmest was 1995, at 26.2 C (79.1 F). The strongest colour marks a difference of 1.0 C (1.8 F).
Annual mean temperature at San Sebastian 2 WNW as warming stripes, 1965 to 1996
YearAnnual mean temperatureDifference from the station mean
196524.3 C-0.90 C
196624.7 C-0.55 C
196724.3 C-0.97 C
196824.2 C-0.98 C
197024.9 C-0.34 C
197424.8 C-0.47 C
197624.7 C-0.55 C
197725.3 C+0.06 C
197925.5 C+0.27 C
198325.6 C+0.41 C
198424.9 C-0.31 C
198525.1 C-0.12 C
198625.2 C-0.03 C
198825.7 C+0.47 C
198925.3 C+0.05 C
199025.5 C+0.24 C
199125.5 C+0.32 C
199225.6 C+0.40 C
199325.8 C+0.61 C
199425.9 C+0.66 C
199526.2 C+0.94 C
199626.0 C+0.78 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1955 to 1997
Yearly extremes at San Sebastian 2 WNW: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)36.7 C (98.1 F)196735.6 C (96.1 F)34
Coldest night (TNn)4.4 C (39.9 F)196612.2 C (54.0 F)34
Wettest day (Rx1day)174.5 mm (6.9 in)195691.4 mm (3.6 in)43
Wettest five days (Rx5day)302.7 mm (11.9 in)1986180.8 mm (7.1 in)43
Longest dry spell (CDD)51 days197019 days43

Hottest day (TXx)

Hottest day (TXx) at San Sebastian 2 WNW by year The hottest day of the year at San Sebastian 2 WNW, 1955 to 1997. The record is 36.7 C (98.1 F) in 1967, marked on the chart; the median year is 35.6 C (96.1 F). 323436381960197019801990Record: 36.7 C (98.1 F) in 1967
The hottest day of the year at San Sebastian 2 WNW, 1955 to 1997. The record is 36.7 C (98.1 F) in 1967, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at San Sebastian 2 WNW by year
YearHottest day (TXx)
1955n/a
1956n/a
1957n/a
1958n/a
1959n/a
1960n/a
1961n/a
1962n/a
1963n/a
196432.2 C (90.0 F)
196535.0 C (95.0 F)
196635.6 C (96.1 F)
196736.7 C (98.1 F)
196835.6 C (96.1 F)
196935.6 C (96.1 F)
197035.0 C (95.0 F)
197136.1 C (97.0 F)
197236.1 C (97.0 F)
197336.7 C (98.1 F)
197436.7 C (98.1 F)
197535.6 C (96.1 F)
197635.0 C (95.0 F)
197734.4 C (93.9 F)
197835.6 C (96.1 F)
197935.0 C (95.0 F)
198036.7 C (98.1 F)
198136.1 C (97.0 F)
198235.0 C (95.0 F)
198335.6 C (96.1 F)
198435.0 C (95.0 F)
198535.0 C (95.0 F)
198635.0 C (95.0 F)
198735.0 C (95.0 F)
198835.0 C (95.0 F)
198935.6 C (96.1 F)
199036.7 C (98.1 F)
199136.1 C (97.0 F)
199235.6 C (96.1 F)
199336.7 C (98.1 F)
199436.1 C (97.0 F)
199536.1 C (97.0 F)
199635.0 C (95.0 F)
199736.1 C (97.0 F)

Coldest night (TNn)

Coldest night (TNn) at San Sebastian 2 WNW by year The coldest night of the year at San Sebastian 2 WNW, 1955 to 1997. The record is 4.4 C (39.9 F) in 1966, marked on the chart; the median year is 12.2 C (54.0 F). 051015201960197019801990Record: 4.4 C (39.9 F) in 1966
The coldest night of the year at San Sebastian 2 WNW, 1955 to 1997. The record is 4.4 C (39.9 F) in 1966, marked on the chart; the median year is 12.2 C (54.0 F).
Coldest night (TNn) at San Sebastian 2 WNW by year
YearColdest night (TNn)
1955n/a
1956n/a
1957n/a
1958n/a
1959n/a
1960n/a
1961n/a
1962n/a
1963n/a
196418.9 C (66.0 F)
196511.7 C (53.1 F)
19664.4 C (39.9 F)
196711.7 C (53.1 F)
196811.1 C (52.0 F)
196910.6 C (51.1 F)
197010.0 C (50.0 F)
197112.8 C (55.0 F)
197210.6 C (51.1 F)
197312.8 C (55.0 F)
197410.6 C (51.1 F)
19758.3 C (46.9 F)
19768.9 C (48.0 F)
197710.6 C (51.1 F)
197812.2 C (54.0 F)
197912.2 C (54.0 F)
198012.8 C (55.0 F)
198113.9 C (57.0 F)
198213.9 C (57.0 F)
198310.0 C (50.0 F)
198412.2 C (54.0 F)
198510.6 C (51.1 F)
198612.8 C (55.0 F)
198712.2 C (54.0 F)
198814.4 C (57.9 F)
198912.8 C (55.0 F)
199011.7 C (53.1 F)
199110.6 C (51.1 F)
199213.9 C (57.0 F)
199313.3 C (55.9 F)
199414.4 C (57.9 F)
199511.1 C (52.0 F)
199615.0 C (59.0 F)
199713.3 C (55.9 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at San Sebastian 2 WNW by year The wettest day of the year at San Sebastian 2 WNW, 1955 to 1997. The record is 174.5 mm (6.9 in) in 1956, marked on the chart; the median year is 91.4 mm (3.6 in). 501001502001960197019801990Record: 174.5 mm (6.9 in) in 1956
The wettest day of the year at San Sebastian 2 WNW, 1955 to 1997. The record is 174.5 mm (6.9 in) in 1956, marked on the chart; the median year is 91.4 mm (3.6 in).
Wettest day (Rx1day) at San Sebastian 2 WNW by year
YearWettest day (Rx1day)
1955101.6 mm (4.0 in)
1956174.5 mm (6.9 in)
1957128.3 mm (5.1 in)
195875.7 mm (3.0 in)
195983.6 mm (3.3 in)
196080.0 mm (3.1 in)
1961106.7 mm (4.2 in)
1962104.9 mm (4.1 in)
196372.6 mm (2.9 in)
196490.2 mm (3.6 in)
1965121.9 mm (4.8 in)
1966101.6 mm (4.0 in)
196771.1 mm (2.8 in)
1968111.8 mm (4.4 in)
196978.7 mm (3.1 in)
1970121.9 mm (4.8 in)
197181.0 mm (3.2 in)
197293.5 mm (3.7 in)
197395.8 mm (3.8 in)
197482.6 mm (3.3 in)
1975137.2 mm (5.4 in)
197672.6 mm (2.9 in)
197769.9 mm (2.8 in)
1978111.0 mm (4.4 in)
1979101.1 mm (4.0 in)
1980144.8 mm (5.7 in)
198193.0 mm (3.7 in)
198264.8 mm (2.6 in)
198391.4 mm (3.6 in)
198488.9 mm (3.5 in)
1985111.3 mm (4.4 in)
198698.6 mm (3.9 in)
1987109.5 mm (4.3 in)
198877.5 mm (3.1 in)
198977.0 mm (3.0 in)
199075.9 mm (3.0 in)
199180.5 mm (3.2 in)
199284.1 mm (3.3 in)
199386.4 mm (3.4 in)
199472.6 mm (2.9 in)
199588.9 mm (3.5 in)
199691.9 mm (3.6 in)
1997102.6 mm (4.0 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at San Sebastian 2 WNW by year The wettest five days of the year at San Sebastian 2 WNW, 1955 to 1997. The record is 302.7 mm (11.9 in) in 1986, marked on the chart; the median year is 180.8 mm (7.1 in). 1001502002503003501960197019801990Record: 302.7 mm (11.9 in) in 1986
The wettest five days of the year at San Sebastian 2 WNW, 1955 to 1997. The record is 302.7 mm (11.9 in) in 1986, marked on the chart; the median year is 180.8 mm (7.1 in).
Wettest five days (Rx5day) at San Sebastian 2 WNW by year
YearWettest five days (Rx5day)
1955180.8 mm (7.1 in)
1956184.1 mm (7.2 in)
1957171.7 mm (6.8 in)
1958107.5 mm (4.2 in)
1959221.0 mm (8.7 in)
1960200.4 mm (7.9 in)
1961194.3 mm (7.6 in)
1962177.0 mm (7.0 in)
1963153.1 mm (6.0 in)
1964158.7 mm (6.2 in)
1965245.9 mm (9.7 in)
1966155.5 mm (6.1 in)
1967153.4 mm (6.0 in)
1968206.7 mm (8.1 in)
1969216.0 mm (8.5 in)
1970183.7 mm (7.2 in)
1971176.7 mm (7.0 in)
1972172.0 mm (6.8 in)
1973154.3 mm (6.1 in)
1974206.1 mm (8.1 in)
1975243.9 mm (9.6 in)
1976155.8 mm (6.1 in)
1977147.7 mm (5.8 in)
1978207.6 mm (8.2 in)
1979186.0 mm (7.3 in)
1980246.6 mm (9.7 in)
1981199.9 mm (7.9 in)
1982185.5 mm (7.3 in)
1983183.0 mm (7.2 in)
1984217.2 mm (8.6 in)
1985191.5 mm (7.5 in)
1986302.7 mm (11.9 in)
1987142.5 mm (5.6 in)
1988133.2 mm (5.2 in)
1989130.4 mm (5.1 in)
1990149.6 mm (5.9 in)
1991157.9 mm (6.2 in)
1992179.3 mm (7.1 in)
1993162.3 mm (6.4 in)
1994154.5 mm (6.1 in)
1995257.6 mm (10.1 in)
1996231.9 mm (9.1 in)
1997172.8 mm (6.8 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at San Sebastian 2 WNW by year The longest dry spell of the year at San Sebastian 2 WNW, 1955 to 1997. The record is 51 days in 1970, marked on the chart; the median year is 19 days. 02040601960197019801990Record: 51 days in 1970
The longest dry spell of the year at San Sebastian 2 WNW, 1955 to 1997. The record is 51 days in 1970, marked on the chart; the median year is 19 days.
Longest dry spell (CDD) at San Sebastian 2 WNW by year
YearLongest dry spell (CDD)
19559 days
195617 days
195714 days
195829 days
195915 days
196012 days
196119 days
196216 days
196323 days
196423 days
196514 days
196615 days
196725 days
196818 days
196922 days
197051 days
197115 days
197227 days
197324 days
197413 days
197514 days
197628 days
197729 days
197820 days
197917 days
198032 days
198116 days
198217 days
198331 days
198420 days
198524 days
198616 days
198712 days
198818 days
198921 days
199016 days
199121 days
199220 days
199326 days
199420 days
199515 days
199613 days
199724 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

40 years, 1956 to 1996

A day with at least 89.0 mm (3.5 in) of rain is expected about once in 2 years. A day with at least 174.4 mm (6.9 in) of rain is expected about once in 100 years.

Rainfall return levels at San Sebastian 2 WNW: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years89.0 mm (3.5 in)
5 years107.6 mm (4.2 in)
10 years121.5 mm (4.8 in)
25 years141.0 mm (5.6 in)
50 years157.1 mm (6.2 in)Longer than the 40 years of record
100 years174.4 mm (6.9 in)Longer than the 40 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, 40 years of values from 1956 to 1996.

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: 174.5 mm (6.9 in) in 1956; 137.2 mm (5.4 in) in 1975; 128.3 mm (5.1 in) in 1957.

Download the Data

  • Data for San Sebastian 2 WNW standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for San Sebastian 2 WNW 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).