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San Nicolas Is Weather Records (USW00093116)

Record envelope, standing records and threshold days for San Nicolas Is (USW00093116), California, United States, with 94 years of record.

Key Facts for San Nicolas Is

  • San Nicolas Is (USW00093116) is a weather station in California, United States at 33.23 latitude and -119.46 longitude, 161 m (529 ft) above sea level.
  • The station reports from 1933 to 2026, 94 years of record.
  • 1,464 records set at San Nicolas Is still stand.
  • Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
  • San Nicolas Is set a monthly record high minimum temperature of 24.4 C (75.9 F) on 6 October 2026 (provisional).

Provisional Records

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

About the Station

  • Location: California, United States, 33.23 latitude, -119.46 longitude.
  • Elevation: 161 m (529 ft).
  • Period of record: 1933 to 2026, 94 years.
  • Eligible elements: tmax, tmin, prcp, snow.

Daily Record Envelope and 2026

19 days at or beyond a record
Daily record high and record low at San Nicolas Is, with 2026 drawn through them The band shows the record high and record low for each calendar day at San Nicolas Is. The lines show the 2026 daily maximum and minimum. 19 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 Nicolas Is. The lines show the 2026 daily maximum and minimum. 19 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at San Nicolas Is, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan28.3 C (82.9 F)0.6 C (33.1 F)23.9 C (75.0 F)6.1 C (43.0 F)
Feb29.4 C (84.9 F)2.8 C (37.0 F)27.2 C (81.0 F)5.6 C (42.1 F)
Mar32.2 C (90.0 F)1.1 C (34.0 F)32.2 C (90.0 F)9.4 C (48.9 F)
Apr33.3 C (91.9 F)3.3 C (37.9 F)25.6 C (78.1 F)10.0 C (50.0 F)
May32.8 C (91.0 F)5.0 C (41.0 F)23.3 C (73.9 F)10.0 C (50.0 F)
Jun33.9 C (93.0 F)5.0 C (41.0 F)n/an/a
Jul35.0 C (95.0 F)6.7 C (44.1 F)27.8 C (82.0 F)13.0 C (55.4 F)
Aug36.7 C (98.1 F)7.8 C (46.0 F)32.2 C (90.0 F)12.8 C (55.0 F)
Sep39.4 C (102.9 F)7.8 C (46.0 F)36.7 C (98.1 F)13.9 C (57.0 F)
Oct37.8 C (100.0 F)4.4 C (39.9 F)35.6 C (96.1 F)13.9 C (57.0 F)
Nov31.7 C (89.1 F)3.3 C (37.9 F)n/an/a
Dec30.6 C (87.1 F)1.7 C (35.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at San Nicolas Is by the year they were set 1,464 records at San Nicolas Is still stand. 1949 holds the most, with 79. 0204060801933: 231934: 131935: 291936: 501937: 141938: 181939: 421940: 261941: 411942: 121943: 141944: 421945: 291946: 371947: 221948: 751949: 791950: 601951: 401952: 111955: 11957: 21962: 21963: 71964: 161965: 331966: 461967: 751968: 231969: 351970: 191971: 521972: 341973: 261974: 141975: 241976: 361977: 171978: 251979: 351980: 301981: 241982: 101983: 241984: 251985: 441986: 121989: 42007: 132008: 352009: 102025: 62026: 28193319391945195119641970197619822007
1,464 records at San Nicolas Is still stand. 1949 holds the most, with 79.
Standing records at San Nicolas Is by the year they were set
Year setStanding records
193323
193413
193529
193650
193714
193818
193942
194026
194141
194212
194314
194442
194529
194637
194722
194875
194979
195060
195140
195211
19551
19572
19622
19637
196416
196533
196646
196775
196823
196935
197019
197152
197234
197326
197414
197524
197636
197717
197825
197935
198030
198124
198210
198324
198425
198544
198612
19894
200713
200835
200910
20256
202628

All-Time Record Progression

1 new records
When San Nicolas Is set new all-time records 1 all-time records were set at San Nicolas Is between 27 December 1984 and 27 December 1984. Each dot is a new record. Record daily precipitation27 December 1984: Record daily precipitation 82.6 mm (3.3 in)1985
1 all-time records were set at San Nicolas Is between 27 December 1984 and 27 December 1984. Each dot is a new record.
When San Nicolas Is set new all-time records
DateKindDetail
1984-12-27Record daily precipitationRecord daily precipitation 82.6 mm (3.3 in)

Wettest Day of Each Month

Dec: 82.6 mm (3.3 in)
Record daily precipitation for each month at San Nicolas Is The wettest day on record for each calendar month at San Nicolas Is. The most was 82.6 mm (3.3 in) on 27 December 1984. 0255075100 Jan: 51.1 mm (2.0 in), 15 January 1979 Jan Feb: 55.9 mm (2.2 in), 2 February 1983 Feb Mar: 69.1 mm (2.7 in), 2 March 1938 Mar Apr: 24.4 mm (1.0 in), 27 April 1944 Apr May: 21.6 mm (0.9 in), 12 May 1977 May Jun: 9.4 mm (0.37 in), 7 June 2007 Jun Jul: 2.3 mm (0.09 in), 9 July 1950 Jul Aug: 27.7 mm (1.1 in), 9 August 1936 Aug Sep: 42.4 mm (1.7 in), 28 September 1976 Sep Oct: 32.0 mm (1.3 in), 9 October 1985 Oct Nov: 65.3 mm (2.6 in), 14 November 1965 Nov Dec: 82.6 mm (3.3 in), 27 December 1984 Dec
The wettest day on record for each calendar month at San Nicolas Is. The most was 82.6 mm (3.3 in) on 27 December 1984.
Record daily precipitation for each month at San Nicolas Is
MonthRecord daily precipitation (mm)Date
Jan51.1 mm (2.0 in)15 January 1979
Feb55.9 mm (2.2 in)2 February 1983
Mar69.1 mm (2.7 in)2 March 1938
Apr24.4 mm (1.0 in)27 April 1944
May21.6 mm (0.9 in)12 May 1977
Jun9.4 mm (0.37 in)7 June 2007
Jul2.3 mm (0.09 in)9 July 1950
Aug27.7 mm (1.1 in)9 August 1936
Sep42.4 mm (1.7 in)28 September 1976
Oct32.0 mm (1.3 in)9 October 1985
Nov65.3 mm (2.6 in)14 November 1965
Dec82.6 mm (3.3 in)27 December 1984

Period of Record Coverage

1933 to 2026
Days with data per year at San Nicolas Is 54 years of record at San Nicolas Is, 1933 to 2026. 18 years have data for under 90 percent of days and are left out of rankings: 1933, 1945, 1946, 1947, 1952, 1955, 1957, 1962 and others. 1933: 132 of 365 days1934: 364 of 365 days1935: 365 of 365 days1936: 366 of 366 days1937: 332 of 365 days1938: 365 of 365 days1939: 360 of 365 days1940: 366 of 366 days1941: 365 of 365 days1942: 365 of 365 days1943: 365 of 365 days1944: 366 of 366 days1945: 304 of 365 days1946: 182 of 365 days1947: 295 of 365 days1948: 359 of 366 days1949: 354 of 365 days1950: 361 of 365 days1951: 360 of 365 days1952: 90 of 366 days1955: 31 of 365 days1957: 27 of 365 days1962: 31 of 365 days1963: 92 of 365 days1964: 122 of 366 days1965: 365 of 365 days1966: 355 of 365 days1967: 358 of 365 days1968: 302 of 366 days1969: 364 of 365 days1970: 362 of 365 days1971: 365 of 365 days1972: 366 of 366 days1973: 362 of 365 days1974: 363 of 365 days1975: 352 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 356 of 365 days1979: 355 of 365 days1980: 366 of 366 days1981: 361 of 365 days1982: 365 of 365 days1983: 363 of 365 days1984: 363 of 366 days1985: 354 of 365 days1986: 273 of 365 days1989: 30 of 365 days2007: 261 of 365 days2008: 353 of 366 days2009: 102 of 365 days2010: 24 of 365 days2025: 276 of 365 days2026: 223 of 365 days19401950197019802010
54 years of record at San Nicolas Is, 1933 to 2026. 18 years have data for under 90 percent of days and are left out of rankings: 1933, 1945, 1946, 1947, 1952, 1955, 1957, 1962 and others.
Days with data per year at San Nicolas Is
YearDays with dataShare of yearComplete
193313236%No
1934364100%Yes
1935365100%Yes
1936366100%Yes
193733291%Yes
1938365100%Yes
193936099%Yes
1940366100%Yes
1941365100%Yes
1942365100%Yes
1943365100%Yes
1944366100%Yes
194530483%No
194618250%No
194729581%No
194835998%Yes
194935497%Yes
195036199%Yes
195136099%Yes
19529025%No
1955318%No
1957277%No
1962318%No
19639225%No
196412233%No
1965365100%Yes
196635597%Yes
196735898%Yes
196830283%No
1969364100%Yes
197036299%Yes
1971365100%Yes
1972366100%Yes
197336299%Yes
197436399%Yes
197535296%Yes
1976366100%Yes
1977365100%Yes
197835698%Yes
197935597%Yes
1980366100%Yes
198136199%Yes
1982365100%Yes
198336399%Yes
198436399%Yes
198535497%Yes
198627375%No
1989308%No
200726172%No
200835396%Yes
200910228%No
2010247%No
202527676%No
202622361%No

Latest Records

20
Latest records at San Nicolas Is
DateStationRecordValueBeat old record byOld record stoodSignificance
6 October 2026San Nicolas Is, USmonthly high min (Provisional)24.4 C (75.9 F)0.5 C (0.9 F)0 years21 of 100 (Routine)
5 October 2026San Nicolas Is, USmonthly high min (Provisional)23.9 C (75.0 F)2.2 C (4.0 F)18 years33 of 100 (Routine)
5 October 2026San Nicolas Is, USdaily high max (Provisional)35.6 C (96.1 F)1.7 C (3.1 F)55 years29 of 100 (Routine)
4 October 2026San Nicolas Is, USdaily high max (Provisional)32.8 C (91.0 F)0.6 C (1.1 F)55 years26 of 100 (Routine)
4 October 2026San Nicolas Is, USmonthly high min (Tie, Provisional)21.7 C (71.1 F)tie18 years6 of 100 (Routine)
3 October 2026San Nicolas Is, USmonthly high min (Tie, Provisional)21.7 C (71.1 F)tie18 years6 of 100 (Routine)
3 October 2026San Nicolas Is, USdaily high max (Tie, Provisional)32.8 C (91.0 F)tie40 years5 of 100 (Routine)
10 September 2026San Nicolas Is, USdaily high min (Provisional)23.9 C (75.0 F)3.9 C (7.0 F)41 years39 of 100 (Notable)
9 September 2026San Nicolas Is, USdaily high max (Provisional)36.7 C (98.1 F)6.1 C (11.0 F)47 years38 of 100 (Notable)
9 September 2026San Nicolas Is, USdaily high min (Provisional)23.9 C (75.0 F)1.7 C (3.1 F)41 years28 of 100 (Routine)
6 September 2026San Nicolas Is, USdaily rain (Provisional)24.4 mm (1.0 in)23.6 mm (0.9 in)55 years20 of 100 (Routine)
27 August 2026San Nicolas Is, USdaily high min (Provisional)21.1 C (70.0 F)2.8 C (5.0 F)91 years52 of 100 (Notable)
26 August 2026San Nicolas Is, USdaily high min (Provisional)20.0 C (68.0 F)1.1 C (2.0 F)91 years42 of 100 (Notable)
25 August 2026San Nicolas Is, USdaily high min (Provisional)20.0 C (68.0 F)2.8 C (5.0 F)16 years30 of 100 (Routine)
21 July 2026San Nicolas Is, USdaily high min17.8 C (64.0 F)1.7 C (3.1 F)88 years45 of 100 (Notable)
9 April 2026San Nicolas Is, USdaily high min (Tie)15.0 C (59.0 F)tie87 years8 of 100 (Routine)
6 April 2026San Nicolas Is, USdaily high min13.9 C (57.0 F)1.1 C (2.0 F)84 years39 of 100 (Notable)
5 April 2026San Nicolas Is, USdaily high min15.0 C (59.0 F)1.7 C (3.1 F)55 years33 of 100 (Routine)
4 April 2026San Nicolas Is, USdaily high min (Tie)14.4 C (57.9 F)tie55 years6 of 100 (Routine)
31 March 2026San Nicolas Is, USdaily high min (Tie)13.3 C (55.9 F)tie92 years9 of 100 (Routine)

Climate Trend

31 complete years, 1934 to 2008
Annual mean temperature at San Nicolas Is as warming stripes, 1934 to 2008 One stripe for each of 31 complete years at San Nicolas Is, 1934 to 2008. Blue stripes are years cooler than the station's own mean of 15.3 C (59.5 F); red stripes are warmer. The coolest year was 1948, at 13.8 C (56.9 F), and the warmest was 2008, at 16.9 C (62.4 F). The strongest colour marks a difference of 1.7 C (3.1 F). 1934: 15.9 C, +0.7 C from the station mean1935: 15.2 C, -0.1 C from the station mean1936: 16.4 C, +1.1 C from the station mean1938: 15.6 C, +0.3 C from the station mean1939: 15.8 C, +0.5 C from the station mean1940: 16.3 C, +1.0 C from the station mean1941: 16.7 C, +1.4 C from the station mean1942: 15.5 C, +0.3 C from the station mean1943: 15.8 C, +0.5 C from the station mean1944: 14.7 C, -0.6 C from the station mean1948: 13.8 C, -1.5 C from the station mean1949: 13.9 C, -1.3 C from the station mean1950: 14.1 C, -1.2 C from the station mean1951: 14.1 C, -1.1 C from the station mean1965: 15.3 C, 0.0 C from the station mean1966: 14.4 C, -0.9 C from the station mean1967: 14.7 C, -0.6 C from the station mean1969: 14.5 C, -0.8 C from the station mean1970: 15.3 C, 0.0 C from the station mean1971: 14.7 C, -0.6 C from the station mean1972: 14.9 C, -0.4 C from the station mean1973: 14.8 C, -0.5 C from the station mean1974: 14.9 C, -0.3 C from the station mean1979: 14.9 C, -0.4 C from the station mean1980: 16.3 C, +1.0 C from the station mean1981: 15.7 C, +0.4 C from the station mean1982: 15.1 C, -0.2 C from the station mean1983: 16.2 C, +0.9 C from the station mean1984: 16.0 C, +0.8 C from the station mean1985: 15.3 C, 0.0 C from the station mean2008: 16.9 C, +1.6 C from the station mean19341940195019601970198019902000
One stripe for each of 31 complete years at San Nicolas Is, 1934 to 2008. Blue stripes are years cooler than the station's own mean of 15.3 C (59.5 F); red stripes are warmer. The coolest year was 1948, at 13.8 C (56.9 F), and the warmest was 2008, at 16.9 C (62.4 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at San Nicolas Is as warming stripes, 1934 to 2008
YearAnnual mean temperatureDifference from the station mean
193415.9 C+0.65 C
193515.2 C-0.07 C
193616.4 C+1.13 C
193815.6 C+0.34 C
193915.8 C+0.49 C
194016.3 C+1.03 C
194116.7 C+1.37 C
194215.5 C+0.25 C
194315.8 C+0.47 C
194414.7 C-0.57 C
194813.8 C-1.47 C
194913.9 C-1.35 C
195014.1 C-1.20 C
195114.1 C-1.15 C
196515.3 C+0.01 C
196614.4 C-0.91 C
196714.7 C-0.62 C
196914.5 C-0.78 C
197015.3 C+0.00 C
197114.7 C-0.62 C
197214.9 C-0.41 C
197314.8 C-0.50 C
197414.9 C-0.35 C
197914.9 C-0.39 C
198016.3 C+1.02 C
198115.7 C+0.43 C
198215.1 C-0.22 C
198316.2 C+0.90 C
198416.0 C+0.76 C
198515.3 C+0.01 C
200816.9 C+1.62 C

The fitted trend in annual mean temperature here over 1934 to 2008 is 0.03 C (-0.13 to 0.19) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.2 to 0.3) per decade. The slope is a straight line fitted to 31 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at San Nicolas Is
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.03 C (-0.13 to 0.19) per decade0.1 F (-0.2 to 0.3) per decade1934 to 200831Not clearly different from zero
Mean daily maximum0.3 C (0.2 to 0.5) per decade0.6 F (0.3 to 0.9) per decade1934 to 200831Rise
Mean daily minimum-0.3 C (-0.4 to -0.1) per decade-0.5 F (-0.8 to -0.1) per decade1934 to 200831Fall

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

1933 to 2026
Yearly extremes at San Nicolas Is: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)39.4 C (102.9 F)197032.8 C (91.0 F)54
Coldest night (TNn)0.6 C (33.1 F)19495.0 C (41.0 F)54
Wettest day (Rx1day)82.6 mm (3.3 in)198426.7 mm (1.1 in)52
Wettest five days (Rx5day)139.2 mm (5.5 in)193850.3 mm (2.0 in)51
Longest dry spell (CDD)239 days1970146 days52

Hottest day (TXx)

Hottest day (TXx) at San Nicolas Is by year The hottest day of the year at San Nicolas Is, 1933 to 2026. The record is 39.4 C (102.9 F) in 1970, marked on the chart; the median year is 32.8 C (91.0 F). 202530354019401960198020002020Record: 39.4 C (102.9 F) in 1970
The hottest day of the year at San Nicolas Is, 1933 to 2026. The record is 39.4 C (102.9 F) in 1970, marked on the chart; the median year is 32.8 C (91.0 F).
Hottest day (TXx) at San Nicolas Is by year
YearHottest day (TXx)
193330.0 C (86.0 F)
193430.6 C (87.1 F)
193528.9 C (84.0 F)
193631.1 C (88.0 F)
193732.8 C (91.0 F)
193828.9 C (84.0 F)
193936.1 C (97.0 F)
194029.4 C (84.9 F)
194131.1 C (88.0 F)
194229.4 C (84.9 F)
194330.6 C (87.1 F)
194435.6 C (96.1 F)
194533.3 C (91.9 F)
194628.3 C (82.9 F)
194730.6 C (87.1 F)
194833.3 C (91.9 F)
194931.7 C (89.1 F)
195037.8 C (100.0 F)
195131.7 C (89.1 F)
195223.3 C (73.9 F)
195528.3 C (82.9 F)
195727.8 C (82.0 F)
196227.2 C (81.0 F)
196337.2 C (99.0 F)
196432.8 C (91.0 F)
196534.4 C (93.9 F)
196631.1 C (88.0 F)
196735.0 C (95.0 F)
196833.3 C (91.9 F)
196932.2 C (90.0 F)
197039.4 C (102.9 F)
197137.2 C (99.0 F)
197233.9 C (93.0 F)
197332.8 C (91.0 F)
197435.0 C (95.0 F)
197535.0 C (95.0 F)
197631.1 C (88.0 F)
197731.1 C (88.0 F)
197838.3 C (100.9 F)
197936.1 C (97.0 F)
198035.0 C (95.0 F)
198132.8 C (91.0 F)
198232.8 C (91.0 F)
198335.6 C (96.1 F)
198434.4 C (93.9 F)
198535.0 C (95.0 F)
198633.3 C (91.9 F)
198925.6 C (78.1 F)
200734.4 C (93.9 F)
200835.6 C (96.1 F)
200936.7 C (98.1 F)
201022.2 C (72.0 F)
202531.1 C (88.0 F)
202636.7 C (98.1 F)

Coldest night (TNn)

Coldest night (TNn) at San Nicolas Is by year The coldest night of the year at San Nicolas Is, 1933 to 2026. The record is 0.6 C (33.1 F) in 1949, marked on the chart; the median year is 5.0 C (41.0 F). 05101519401960198020002020Record: 0.6 C (33.1 F) in 1949
The coldest night of the year at San Nicolas Is, 1933 to 2026. The record is 0.6 C (33.1 F) in 1949, marked on the chart; the median year is 5.0 C (41.0 F).
Coldest night (TNn) at San Nicolas Is by year
YearColdest night (TNn)
19337.2 C (45.0 F)
19348.3 C (46.9 F)
19356.7 C (44.1 F)
19366.1 C (43.0 F)
19376.7 C (44.1 F)
19387.2 C (45.0 F)
19395.0 C (41.0 F)
19408.9 C (48.0 F)
19418.9 C (48.0 F)
19427.2 C (45.0 F)
19438.3 C (46.9 F)
19445.0 C (41.0 F)
19455.0 C (41.0 F)
19466.7 C (44.1 F)
19475.0 C (41.0 F)
19483.3 C (37.9 F)
19490.6 C (33.1 F)
19504.4 C (39.9 F)
19511.1 C (34.0 F)
19525.6 C (42.1 F)
195511.1 C (52.0 F)
195711.7 C (53.1 F)
196210.6 C (51.1 F)
196311.7 C (53.1 F)
19645.6 C (42.1 F)
19654.4 C (39.9 F)
19662.8 C (37.0 F)
19672.2 C (36.0 F)
19683.9 C (39.0 F)
19692.8 C (37.0 F)
19703.3 C (37.9 F)
19712.2 C (36.0 F)
19721.7 C (35.1 F)
19733.3 C (37.9 F)
19744.4 C (39.9 F)
19752.2 C (36.0 F)
19763.3 C (37.9 F)
19774.4 C (39.9 F)
19782.8 C (37.0 F)
19792.8 C (37.0 F)
19806.1 C (43.0 F)
19814.4 C (39.9 F)
19824.4 C (39.9 F)
19834.4 C (39.9 F)
19843.3 C (37.9 F)
19853.9 C (39.0 F)
19865.0 C (41.0 F)
19893.3 C (37.9 F)
20076.1 C (43.0 F)
20086.1 C (43.0 F)
20095.0 C (41.0 F)
20106.7 C (44.1 F)
20257.8 C (46.0 F)
20265.6 C (42.1 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at San Nicolas Is by year The wettest day of the year at San Nicolas Is, 1933 to 2026. The record is 82.6 mm (3.3 in) in 1984, marked on the chart; the median year is 26.7 mm (1.1 in). 025507510019401960198020002020Record: 82.6 mm (3.3 in) in 1984
The wettest day of the year at San Nicolas Is, 1933 to 2026. The record is 82.6 mm (3.3 in) in 1984, marked on the chart; the median year is 26.7 mm (1.1 in).
Wettest day (Rx1day) at San Nicolas Is by year
YearWettest day (Rx1day)
193320.6 mm (0.8 in)
193420.3 mm (0.8 in)
193526.7 mm (1.1 in)
193631.0 mm (1.2 in)
193742.7 mm (1.7 in)
193869.1 mm (2.7 in)
193938.1 mm (1.5 in)
194056.4 mm (2.2 in)
194141.9 mm (1.6 in)
194226.7 mm (1.1 in)
194345.7 mm (1.8 in)
194426.4 mm (1.0 in)
194547.8 mm (1.9 in)
194611.4 mm (0.4 in)
19472.5 mm (0.10 in)
194825.9 mm (1.0 in)
194917.3 mm (0.7 in)
195028.4 mm (1.1 in)
195127.2 mm (1.1 in)
195231.2 mm (1.2 in)
19550.0 mm (0.00 in)
1957n/a
19620.0 mm (0.00 in)
196310.4 mm (0.4 in)
19649.4 mm (0.37 in)
196565.3 mm (2.6 in)
196630.2 mm (1.2 in)
196722.9 mm (0.9 in)
196818.3 mm (0.7 in)
196934.5 mm (1.4 in)
197058.4 mm (2.3 in)
197117.3 mm (0.7 in)
197219.3 mm (0.8 in)
197319.3 mm (0.8 in)
197440.4 mm (1.6 in)
197519.1 mm (0.8 in)
197642.4 mm (1.7 in)
197740.9 mm (1.6 in)
197833.5 mm (1.3 in)
197951.1 mm (2.0 in)
198050.3 mm (2.0 in)
198123.4 mm (0.9 in)
198222.9 mm (0.9 in)
198355.9 mm (2.2 in)
198482.6 mm (3.3 in)
198538.1 mm (1.5 in)
198644.2 mm (1.7 in)
19897.9 mm (0.31 in)
200712.4 mm (0.5 in)
200819.8 mm (0.8 in)
200919.8 mm (0.8 in)
201016.3 mm (0.6 in)
2025n/a
202624.4 mm (1.0 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at San Nicolas Is by year The wettest five days of the year at San Nicolas Is, 1933 to 2026. The record is 139.2 mm (5.5 in) in 1938, marked on the chart; the median year is 50.3 mm (2.0 in). 05010015019401960198020002020Record: 139.2 mm (5.5 in) in 1938
The wettest five days of the year at San Nicolas Is, 1933 to 2026. The record is 139.2 mm (5.5 in) in 1938, marked on the chart; the median year is 50.3 mm (2.0 in).
Wettest five days (Rx5day) at San Nicolas Is by year
YearWettest five days (Rx5day)
193330.0 mm (1.2 in)
193450.3 mm (2.0 in)
193538.4 mm (1.5 in)
193653.9 mm (2.1 in)
193771.9 mm (2.8 in)
1938139.2 mm (5.5 in)
193938.1 mm (1.5 in)
194099.9 mm (3.9 in)
194175.7 mm (3.0 in)
194232.8 mm (1.3 in)
194384.6 mm (3.3 in)
194466.1 mm (2.6 in)
194591.0 mm (3.6 in)
194616.0 mm (0.6 in)
19473.3 mm (0.13 in)
194828.4 mm (1.1 in)
194936.8 mm (1.4 in)
195029.7 mm (1.2 in)
195156.8 mm (2.2 in)
195269.6 mm (2.7 in)
19550.0 mm (0.00 in)
1957n/a
19620.0 mm (0.00 in)
196310.4 mm (0.4 in)
196411.2 mm (0.4 in)
1965110.8 mm (4.4 in)
196665.5 mm (2.6 in)
196737.4 mm (1.5 in)
196821.0 mm (0.8 in)
196970.3 mm (2.8 in)
197074.9 mm (2.9 in)
197144.2 mm (1.7 in)
197241.3 mm (1.6 in)
197325.7 mm (1.0 in)
197474.7 mm (2.9 in)
197540.4 mm (1.6 in)
197665.3 mm (2.6 in)
197773.7 mm (2.9 in)
197895.2 mm (3.7 in)
197983.9 mm (3.3 in)
1980119.3 mm (4.7 in)
198159.1 mm (2.3 in)
198225.7 mm (1.0 in)
198396.3 mm (3.8 in)
198485.4 mm (3.4 in)
198558.0 mm (2.3 in)
198655.2 mm (2.2 in)
198914.3 mm (0.6 in)
200714.7 mm (0.6 in)
200829.7 mm (1.2 in)
200923.3 mm (0.9 in)
201044.5 mm (1.8 in)
2025n/a
2026n/a

Longest dry spell (CDD)

Longest dry spell (CDD) at San Nicolas Is by year The longest dry spell of the year at San Nicolas Is, 1933 to 2026. The record is 239 days in 1970, marked on the chart; the median year is 146 days. 010020030019401960198020002020Record: 239 days in 1970
The longest dry spell of the year at San Nicolas Is, 1933 to 2026. The record is 239 days in 1970, marked on the chart; the median year is 146 days.
Longest dry spell (CDD) at San Nicolas Is by year
YearLongest dry spell (CDD)
193389 days
1934101 days
1935107 days
193669 days
1937204 days
1938136 days
1939115 days
1940157 days
1941174 days
1942108 days
1943195 days
1944190 days
1945217 days
1946177 days
1947194 days
1948171 days
1949151 days
195066 days
1951179 days
195215 days
195531 days
1957n/a
196231 days
196365 days
196440 days
1965156 days
1966124 days
1967204 days
1968194 days
1969185 days
1970239 days
1971140 days
1972104 days
1973201 days
1974208 days
1975164 days
197665 days
197782 days
1978132 days
1979203 days
198085 days
1981193 days
1982156 days
198397 days
1984156 days
1985166 days
1986169 days
198915 days
200750 days
2008184 days
200990 days
201012 days
2025n/a
20261 day

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

36 years, 1934 to 2008

A day with at least 31.5 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 97.5 mm (3.8 in) of rain is expected about once in 100 years.

Rainfall return levels at San Nicolas Is: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years31.5 mm (1.2 in)
5 years45.8 mm (1.8 in)
10 years56.5 mm (2.2 in)
25 years71.6 mm (2.8 in)
50 years84.0 mm (3.3 in)Longer than the 36 years of record
100 years97.5 mm (3.8 in)Longer than the 36 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, 36 years of values from 1934 to 2008.

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: 82.6 mm (3.3 in) in 1984; 69.1 mm (2.7 in) in 1938; 65.3 mm (2.6 in) in 1965.

Download the Data

  • Data for San Nicolas Is standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for San Nicolas Is 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2026-10-15).