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San Pedro Weather Records (MXN00003058)

Record envelope, standing records and threshold days for San Pedro (MXN00003058), Mexico, with 72 years of record.

Key Facts for San Pedro

  • San Pedro (MXN00003058) is a weather station in Mexico at 23.92 latitude and -110.25 longitude, 190 m (623 ft) above sea level.
  • The station reports from 1941 to 2012, 72 years of record.
  • 1,464 records set at San Pedro still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • San Pedro set a daily record precipitation of 10.4 mm (0.4 in) on 29 December 2012.

About the Station

  • Location: Mexico, 23.92 latitude, -110.25 longitude.
  • Elevation: 190 m (623 ft).
  • Period of record: 1941 to 2012, 72 years.
  • Eligible elements: tmax, tmin, prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at San Pedro, with 2026 drawn through them The band shows the record high and record low for each calendar day at San Pedro. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. 01020304050 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at San Pedro. 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 Pedro, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan40.6 C (105.1 F)0.0 C (32.0 F)n/an/a
Feb41.7 C (107.1 F)0.0 C (32.0 F)n/an/a
Mar37.8 C (100.0 F)0.6 C (33.1 F)n/an/a
Apr40.6 C (105.1 F)3.9 C (39.0 F)n/an/a
May41.7 C (107.1 F)3.9 C (39.0 F)n/an/a
Jun42.8 C (109.0 F)5.0 C (41.0 F)n/an/a
Jul45.0 C (113.0 F)6.7 C (44.1 F)n/an/a
Aug42.8 C (109.0 F)10.0 C (50.0 F)n/an/a
Sep42.8 C (109.0 F)6.7 C (44.1 F)n/an/a
Oct41.7 C (107.1 F)5.0 C (41.0 F)n/an/a
Nov40.6 C (105.1 F)0.6 C (33.1 F)n/an/a
Dec40.0 C (104.0 F)1.7 C (35.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at San Pedro by the year they were set 1,464 records at San Pedro still stand. 1957 holds the most, with 139. 0501001501941: 461951: 11952: 361953: 381954: 141955: 1171956: 651957: 1391958: 811959: 101960: 121961: 141962: 121963: 301964: 201965: 191966: 191967: 221968: 171969: 151970: 61971: 161972: 261973: 171974: 81975: 191976: 61977: 21978: 131979: 171980: 191981: 251982: 91983: 121984: 271985: 541986: 171987: 191988: 201989: 181990: 191991: 91992: 181993: 81994: 101995: 71996: 181997: 251998: 201999: 222000: 322001: 152002: 92003: 12004: 222005: 142006: 82007: 132008: 112009: 82010: 202011: 302012: 48194119571964197119781985199219992006
1,464 records at San Pedro still stand. 1957 holds the most, with 139.
Standing records at San Pedro by the year they were set
Year setStanding records
194146
19511
195236
195338
195414
1955117
195665
1957139
195881
195910
196012
196114
196212
196330
196420
196519
196619
196722
196817
196915
19706
197116
197226
197317
19748
197519
19766
19772
197813
197917
198019
198125
19829
198312
198427
198554
198617
198719
198820
198918
199019
19919
199218
19938
199410
19957
199618
199725
199820
199922
200032
200115
20029
20031
200422
200514
20068
200713
200811
20098
201020
201130
201248

Wettest Day of Each Month

Sep: 221.0 mm (8.7 in)
Record daily precipitation for each month at San Pedro The wettest day on record for each calendar month at San Pedro. The most was 221.0 mm (8.7 in) on 10 September 1949. 0100200300 Jan: 40.9 mm (1.6 in), 10 January 1960 Jan Feb: 39.9 mm (1.6 in), 11 February 2005 Feb Mar: 14.0 mm (0.6 in), 2 March 1981 Mar Apr: 29.0 mm (1.1 in), 18 April 1952 Apr May: 23.4 mm (0.9 in), 18 May 1979 May Jun: 74.9 mm (2.9 in), 27 June 1956 Jun Jul: 82.8 mm (3.3 in), 22 July 1958 Jul Aug: 130.8 mm (5.1 in), 4 August 1958 Aug Sep: 221.0 mm (8.7 in), 10 September 1949 Sep Oct: 79.8 mm (3.1 in), 23 October 2006 Oct Nov: 68.1 mm (2.7 in), 11 November 1994 Nov Dec: 96.8 mm (3.8 in), 8 December 1949 Dec
The wettest day on record for each calendar month at San Pedro. The most was 221.0 mm (8.7 in) on 10 September 1949.
Record daily precipitation for each month at San Pedro
MonthRecord daily precipitation (mm)Date
Jan40.9 mm (1.6 in)10 January 1960
Feb39.9 mm (1.6 in)11 February 2005
Mar14.0 mm (0.6 in)2 March 1981
Apr29.0 mm (1.1 in)18 April 1952
May23.4 mm (0.9 in)18 May 1979
Jun74.9 mm (2.9 in)27 June 1956
Jul82.8 mm (3.3 in)22 July 1958
Aug130.8 mm (5.1 in)4 August 1958
Sep221.0 mm (8.7 in)10 September 1949
Oct79.8 mm (3.1 in)23 October 2006
Nov68.1 mm (2.7 in)11 November 1994
Dec96.8 mm (3.8 in)8 December 1949

Period of Record Coverage

1941 to 2012
Days with data per year at San Pedro 63 years of record at San Pedro, 1941 to 2012. 9 years have data for under 90 percent of days and are left out of rankings: 1941, 1951, 1959, 1969, 1990, 1992, 2003, 2004 and others. 1941: 133 of 365 days1951: 230 of 365 days1952: 366 of 366 days1953: 365 of 365 days1954: 365 of 365 days1955: 364 of 365 days1956: 366 of 366 days1957: 348 of 365 days1958: 329 of 365 days1959: 306 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 336 of 366 days1965: 364 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 299 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 335 of 365 days1976: 336 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 366 of 366 days1981: 334 of 365 days1982: 331 of 365 days1983: 334 of 365 days1984: 366 of 366 days1985: 365 of 365 days1986: 365 of 365 days1987: 365 of 365 days1988: 366 of 366 days1989: 365 of 365 days1990: 273 of 365 days1991: 365 of 365 days1992: 311 of 366 days1993: 365 of 365 days1994: 359 of 365 days1995: 365 of 365 days1996: 359 of 366 days1997: 356 of 365 days1998: 335 of 365 days1999: 365 of 365 days2000: 366 of 366 days2001: 356 of 365 days2002: 365 of 365 days2003: 315 of 365 days2004: 295 of 366 days2005: 355 of 365 days2006: 364 of 365 days2007: 363 of 365 days2008: 358 of 366 days2009: 219 of 365 days2010: 364 of 365 days2011: 364 of 365 days2012: 366 of 366 days196019701980199020002010
63 years of record at San Pedro, 1941 to 2012. 9 years have data for under 90 percent of days and are left out of rankings: 1941, 1951, 1959, 1969, 1990, 1992, 2003, 2004 and others.
Days with data per year at San Pedro
YearDays with dataShare of yearComplete
194113336%No
195123063%No
1952366100%Yes
1953365100%Yes
1954365100%Yes
1955364100%Yes
1956366100%Yes
195734895%Yes
195832990%Yes
195930684%No
1960366100%Yes
1961365100%Yes
1962365100%Yes
1963365100%Yes
196433692%Yes
1965364100%Yes
1966365100%Yes
1967365100%Yes
1968366100%Yes
196929982%No
1970365100%Yes
1971365100%Yes
1972366100%Yes
1973365100%Yes
1974365100%Yes
197533592%Yes
197633692%Yes
1977365100%Yes
1978365100%Yes
1979365100%Yes
1980366100%Yes
198133492%Yes
198233191%Yes
198333492%Yes
1984366100%Yes
1985365100%Yes
1986365100%Yes
1987365100%Yes
1988366100%Yes
1989365100%Yes
199027375%No
1991365100%Yes
199231185%No
1993365100%Yes
199435998%Yes
1995365100%Yes
199635998%Yes
199735698%Yes
199833592%Yes
1999365100%Yes
2000366100%Yes
200135698%Yes
2002365100%Yes
200331586%No
200429581%No
200535597%Yes
2006364100%Yes
200736399%Yes
200835898%Yes
200921960%No
2010364100%Yes
2011364100%Yes
2012366100%Yes

Latest Records

20
Latest records at San Pedro
DateStationRecordValueBeat old record byOld record stoodSignificance
29 December 2012San Pedro, MXdaily rain10.4 mm (0.4 in)2.5 mm (0.10 in)52 years20 of 100 (Routine)
29 December 2012San Pedro, MXdaily low min (Tie)3.9 C (39.0 F)tie12 years2 of 100 (Routine)
25 December 2012San Pedro, MXdaily low min (Tie)3.9 C (39.0 F)tie56 years5 of 100 (Routine)
24 December 2012San Pedro, MXdaily low min3.9 C (39.0 F)1.1 C (2.0 F)57 years27 of 100 (Routine)
12 December 2012San Pedro, MXdaily rain16.8 mm (0.7 in)15.0 mm (0.6 in)47 years20 of 100 (Routine)
10 December 2012San Pedro, MXdaily high min (Tie)18.9 C (66.0 F)tie49 years5 of 100 (Routine)
4 December 2012San Pedro, MXdaily high min (Tie)17.8 C (64.0 F)tie20 years3 of 100 (Routine)
3 December 2012San Pedro, MXdaily high min18.9 C (66.0 F)3.3 C (5.9 F)61 years35 of 100 (Notable)
2 December 2012San Pedro, MXmonthly high min (Tie)20.0 C (68.0 F)tie54 years8 of 100 (Routine)
1 December 2012San Pedro, MXmonthly high min (Tie)20.0 C (68.0 F)tie54 years8 of 100 (Routine)
30 November 2012San Pedro, MXdaily high min20.6 C (69.1 F)3.9 C (7.0 F)61 years38 of 100 (Notable)
30 November 2012San Pedro, MXdaily high max (Tie)35.0 C (95.0 F)tie57 years6 of 100 (Routine)
29 November 2012San Pedro, MXdaily high min23.9 C (75.0 F)5.0 C (9.0 F)23 years30 of 100 (Routine)
29 November 2012San Pedro, MXdaily high max35.0 C (95.0 F)1.1 C (2.0 F)54 years26 of 100 (Routine)
27 November 2012San Pedro, MXdaily high min20.6 C (69.1 F)3.9 C (7.0 F)7 years22 of 100 (Routine)
26 November 2012San Pedro, MXdaily high min22.8 C (73.0 F)2.2 C (4.0 F)45 years27 of 100 (Routine)
25 November 2012San Pedro, MXdaily high min23.9 C (75.0 F)5.0 C (9.0 F)45 years37 of 100 (Notable)
23 November 2012San Pedro, MXdaily high min23.9 C (75.0 F)7.2 C (13.0 F)55 years47 of 100 (Notable)
23 November 2012San Pedro, MXdaily high max (Tie)33.9 C (93.0 F)tie45 years5 of 100 (Routine)
22 November 2012San Pedro, MXdaily high min23.9 C (75.0 F)5.0 C (9.0 F)26 years31 of 100 (Routine)

Climate Trend

45 complete years, 1952 to 2012
Annual mean temperature at San Pedro as warming stripes, 1952 to 2012 One stripe for each of 45 complete years at San Pedro, 1952 to 2012. Blue stripes are years cooler than the station's own mean of 23.0 C (73.3 F); red stripes are warmer. The coolest year was 1955, at 21.5 C (70.8 F), and the warmest was 1952, at 23.8 C (74.9 F). The strongest colour marks a difference of 1.5 C (2.7 F). 1952: 23.8 C, +0.9 C from the station mean1953: 23.8 C, +0.9 C from the station mean1954: 23.4 C, +0.4 C from the station mean1955: 21.5 C, -1.4 C from the station mean1956: 23.2 C, +0.2 C from the station mean1960: 22.3 C, -0.6 C from the station mean1961: 22.6 C, -0.4 C from the station mean1962: 23.0 C, 0.0 C from the station mean1963: 23.6 C, +0.6 C from the station mean1965: 22.9 C, -0.1 C from the station mean1966: 23.2 C, +0.3 C from the station mean1967: 23.0 C, 0.0 C from the station mean1968: 22.4 C, -0.6 C from the station mean1970: 23.0 C, +0.1 C from the station mean1971: 22.6 C, -0.3 C from the station mean1972: 23.4 C, +0.5 C from the station mean1973: 22.5 C, -0.4 C from the station mean1974: 22.6 C, -0.4 C from the station mean1977: 22.9 C, -0.1 C from the station mean1978: 23.2 C, +0.3 C from the station mean1979: 21.9 C, -1.0 C from the station mean1980: 23.5 C, +0.5 C from the station mean1984: 21.8 C, -1.1 C from the station mean1985: 22.4 C, -0.6 C from the station mean1986: 23.2 C, +0.3 C from the station mean1987: 23.0 C, +0.1 C from the station mean1988: 23.1 C, +0.2 C from the station mean1989: 23.1 C, +0.1 C from the station mean1991: 23.1 C, +0.1 C from the station mean1993: 23.5 C, +0.5 C from the station mean1994: 23.7 C, +0.7 C from the station mean1995: 23.3 C, +0.4 C from the station mean1996: 23.5 C, +0.6 C from the station mean1997: 23.5 C, +0.6 C from the station mean1999: 22.7 C, -0.3 C from the station mean2000: 23.1 C, +0.1 C from the station mean2001: 22.7 C, -0.3 C from the station mean2002: 23.0 C, 0.0 C from the station mean2005: 22.7 C, -0.3 C from the station mean2006: 23.1 C, +0.1 C from the station mean2007: 22.4 C, -0.6 C from the station mean2008: 23.0 C, +0.1 C from the station mean2010: 22.6 C, -0.3 C from the station mean2011: 23.0 C, 0.0 C from the station mean2012: 23.7 C, +0.7 C from the station mean1952196019701980199020002010
One stripe for each of 45 complete years at San Pedro, 1952 to 2012. Blue stripes are years cooler than the station's own mean of 23.0 C (73.3 F); red stripes are warmer. The coolest year was 1955, at 21.5 C (70.8 F), and the warmest was 1952, at 23.8 C (74.9 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at San Pedro as warming stripes, 1952 to 2012
YearAnnual mean temperatureDifference from the station mean
195223.8 C+0.87 C
195323.8 C+0.86 C
195423.4 C+0.43 C
195521.5 C-1.43 C
195623.2 C+0.18 C
196022.3 C-0.65 C
196122.6 C-0.40 C
196223.0 C-0.02 C
196323.6 C+0.61 C
196522.9 C-0.12 C
196623.2 C+0.25 C
196723.0 C-0.01 C
196822.4 C-0.56 C
197023.0 C+0.07 C
197122.6 C-0.34 C
197223.4 C+0.45 C
197322.5 C-0.44 C
197422.6 C-0.42 C
197722.9 C-0.12 C
197823.2 C+0.27 C
197921.9 C-1.04 C
198023.5 C+0.51 C
198421.8 C-1.13 C
198522.4 C-0.62 C
198623.2 C+0.26 C
198723.0 C+0.07 C
198823.1 C+0.17 C
198923.1 C+0.11 C
199123.1 C+0.09 C
199323.5 C+0.51 C
199423.7 C+0.68 C
199523.3 C+0.37 C
199623.5 C+0.55 C
199723.5 C+0.55 C
199922.7 C-0.30 C
200023.1 C+0.12 C
200122.7 C-0.31 C
200223.0 C+0.01 C
200522.7 C-0.26 C
200623.1 C+0.10 C
200722.4 C-0.56 C
200823.0 C+0.06 C
201022.6 C-0.35 C
201123.0 C+0.04 C
201223.7 C+0.74 C

The fitted trend in annual mean temperature here over 1952 to 2012 is 0.01 C (-0.07 to 0.10) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.02 F (-0.13 to 0.18) per decade. The slope is a straight line fitted to 45 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at San Pedro
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.01 C (-0.07 to 0.10) per decade0.02 F (-0.13 to 0.18) per decade1952 to 201245Not clearly different from zero
Mean daily maximum-0.1 C (-0.2 to 0.1) per decade-0.1 F (-0.4 to 0.1) per decade1952 to 201245Not clearly different from zero
Mean daily minimum0.1 C (-0.1 to 0.2) per decade0.2 F (-0.1 to 0.4) per decade1952 to 201245Not clearly different from zero

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

1941 to 2012
Yearly extremes at San Pedro: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)45.0 C (113.0 F)197241.7 C (107.1 F)63
Coldest night (TNn)0.0 C (32.0 F)19562.8 C (37.0 F)63
Wettest day (Rx1day)221.0 mm (8.7 in)194959.9 mm (2.4 in)70
Wettest five days (Rx5day)333.7 mm (13.1 in)195981.6 mm (3.2 in)70
Longest dry spell (CDD)219 days1971160 days70

Hottest day (TXx)

Hottest day (TXx) at San Pedro by year The hottest day of the year at San Pedro, 1941 to 2012. The record is 45.0 C (113.0 F) in 1972, marked on the chart; the median year is 41.7 C (107.1 F). 3840424446196019802000Record: 45.0 C (113.0 F) in 1972
The hottest day of the year at San Pedro, 1941 to 2012. The record is 45.0 C (113.0 F) in 1972, marked on the chart; the median year is 41.7 C (107.1 F).
Hottest day (TXx) at San Pedro by year
YearHottest day (TXx)
194141.7 C (107.1 F)
1944n/a
1945n/a
1946n/a
1947n/a
1948n/a
1949n/a
1950n/a
195139.4 C (102.9 F)
195240.6 C (105.1 F)
195342.8 C (109.0 F)
195441.7 C (107.1 F)
195541.7 C (107.1 F)
195641.7 C (107.1 F)
195741.7 C (107.1 F)
195841.7 C (107.1 F)
195940.6 C (105.1 F)
196040.0 C (104.0 F)
196140.6 C (105.1 F)
196241.7 C (107.1 F)
196341.7 C (107.1 F)
196440.0 C (104.0 F)
196541.7 C (107.1 F)
196642.8 C (109.0 F)
196741.7 C (107.1 F)
196841.7 C (107.1 F)
196942.8 C (109.0 F)
197041.7 C (107.1 F)
197141.7 C (107.1 F)
197245.0 C (113.0 F)
197342.8 C (109.0 F)
197440.0 C (104.0 F)
197538.9 C (102.0 F)
197640.0 C (104.0 F)
197740.0 C (104.0 F)
197841.1 C (106.0 F)
197941.7 C (107.1 F)
198045.0 C (113.0 F)
198140.6 C (105.1 F)
198240.0 C (104.0 F)
198340.0 C (104.0 F)
198438.9 C (102.0 F)
198541.7 C (107.1 F)
198641.7 C (107.1 F)
198741.7 C (107.1 F)
198841.7 C (107.1 F)
198942.2 C (108.0 F)
199041.1 C (106.0 F)
199141.7 C (107.1 F)
199242.2 C (108.0 F)
199342.2 C (108.0 F)
199441.7 C (107.1 F)
199540.6 C (105.1 F)
199641.7 C (107.1 F)
199741.7 C (107.1 F)
199842.8 C (109.0 F)
199941.7 C (107.1 F)
200042.8 C (109.0 F)
200140.6 C (105.1 F)
200240.6 C (105.1 F)
200340.0 C (104.0 F)
200438.9 C (102.0 F)
200540.0 C (104.0 F)
200640.6 C (105.1 F)
200740.0 C (104.0 F)
200838.9 C (102.0 F)
200942.8 C (109.0 F)
201042.8 C (109.0 F)
201142.8 C (109.0 F)
201241.7 C (107.1 F)

Coldest night (TNn)

Coldest night (TNn) at San Pedro by year The coldest night of the year at San Pedro, 1941 to 2012. The record is 0.0 C (32.0 F) in 1956, marked on the chart; the median year is 2.8 C (37.0 F). 051015196019802000Record: 0.0 C (32.0 F) in 1956
The coldest night of the year at San Pedro, 1941 to 2012. The record is 0.0 C (32.0 F) in 1956, marked on the chart; the median year is 2.8 C (37.0 F).
Coldest night (TNn) at San Pedro by year
YearColdest night (TNn)
194111.7 C (53.1 F)
1944n/a
1945n/a
1946n/a
1947n/a
1948n/a
1949n/a
1950n/a
19518.9 C (48.0 F)
19525.0 C (41.0 F)
19535.0 C (41.0 F)
19545.0 C (41.0 F)
19550.6 C (33.1 F)
19560.0 C (32.0 F)
19572.8 C (37.0 F)
19585.0 C (41.0 F)
19596.7 C (44.1 F)
19601.7 C (35.1 F)
19610.6 C (33.1 F)
19625.0 C (41.0 F)
19632.8 C (37.0 F)
19640.6 C (33.1 F)
19652.8 C (37.0 F)
19662.8 C (37.0 F)
19673.9 C (39.0 F)
19683.9 C (39.0 F)
19692.8 C (37.0 F)
19703.9 C (39.0 F)
19712.8 C (37.0 F)
19723.9 C (39.0 F)
19732.8 C (37.0 F)
19741.7 C (35.1 F)
19753.9 C (39.0 F)
19763.9 C (39.0 F)
19776.7 C (44.1 F)
19785.0 C (41.0 F)
19795.0 C (41.0 F)
19806.7 C (44.1 F)
19815.0 C (41.0 F)
19824.4 C (39.9 F)
19835.0 C (41.0 F)
19844.4 C (39.9 F)
19853.3 C (37.9 F)
19862.8 C (37.0 F)
19872.8 C (37.0 F)
19881.7 C (35.1 F)
19890.0 C (32.0 F)
19900.0 C (32.0 F)
19912.8 C (37.0 F)
19925.0 C (41.0 F)
19933.9 C (39.0 F)
19940.6 C (33.1 F)
19953.3 C (37.9 F)
19960.0 C (32.0 F)
19972.8 C (37.0 F)
19981.7 C (35.1 F)
19991.7 C (35.1 F)
20001.1 C (34.0 F)
20011.7 C (35.1 F)
20021.7 C (35.1 F)
20030.6 C (33.1 F)
20042.8 C (37.0 F)
20050.6 C (33.1 F)
20060.6 C (33.1 F)
20072.8 C (37.0 F)
20080.6 C (33.1 F)
20093.9 C (39.0 F)
20100.6 C (33.1 F)
20110.6 C (33.1 F)
20122.8 C (37.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at San Pedro by year The wettest day of the year at San Pedro, 1941 to 2012. The record is 221.0 mm (8.7 in) in 1949, marked on the chart; the median year is 59.9 mm (2.4 in). 0100200300196019802000Record: 221.0 mm (8.7 in) in 1949
The wettest day of the year at San Pedro, 1941 to 2012. The record is 221.0 mm (8.7 in) in 1949, marked on the chart; the median year is 59.9 mm (2.4 in).
Wettest day (Rx1day) at San Pedro by year
YearWettest day (Rx1day)
19410.0 mm (0.00 in)
194430.0 mm (1.2 in)
194532.8 mm (1.3 in)
194669.9 mm (2.8 in)
194730.0 mm (1.2 in)
194866.8 mm (2.6 in)
1949221.0 mm (8.7 in)
195035.8 mm (1.4 in)
195158.9 mm (2.3 in)
195237.3 mm (1.5 in)
195325.9 mm (1.0 in)
195431.8 mm (1.3 in)
195545.0 mm (1.8 in)
195674.9 mm (2.9 in)
1957144.8 mm (5.7 in)
1958130.8 mm (5.1 in)
1959200.9 mm (7.9 in)
196054.9 mm (2.2 in)
196151.8 mm (2.0 in)
196231.8 mm (1.3 in)
196377.0 mm (3.0 in)
196447.0 mm (1.9 in)
196559.9 mm (2.4 in)
196662.0 mm (2.4 in)
196759.9 mm (2.4 in)
196828.4 mm (1.1 in)
196946.0 mm (1.8 in)
197045.0 mm (1.8 in)
1971109.0 mm (4.3 in)
197265.8 mm (2.6 in)
1973102.4 mm (4.0 in)
197459.9 mm (2.4 in)
197539.9 mm (1.6 in)
197656.4 mm (2.2 in)
197764.8 mm (2.6 in)
1978118.4 mm (4.7 in)
197923.4 mm (0.9 in)
198027.9 mm (1.1 in)
198159.9 mm (2.4 in)
1982169.4 mm (6.7 in)
198378.2 mm (3.1 in)
198459.9 mm (2.4 in)
198564.8 mm (2.6 in)
198683.8 mm (3.3 in)
198738.4 mm (1.5 in)
198861.5 mm (2.4 in)
198966.5 mm (2.6 in)
199054.9 mm (2.2 in)
1991114.0 mm (4.5 in)
199272.6 mm (2.9 in)
199351.6 mm (2.0 in)
199468.1 mm (2.7 in)
199557.9 mm (2.3 in)
199655.4 mm (2.2 in)
199750.3 mm (2.0 in)
199877.0 mm (3.0 in)
199925.4 mm (1.0 in)
200072.1 mm (2.8 in)
2001200.2 mm (7.9 in)
200261.0 mm (2.4 in)
2003117.9 mm (4.6 in)
200446.5 mm (1.8 in)
200539.9 mm (1.6 in)
200679.8 mm (3.1 in)
2007179.8 mm (7.1 in)
200878.0 mm (3.1 in)
200952.3 mm (2.1 in)
201083.6 mm (3.3 in)
201116.8 mm (0.7 in)
201256.4 mm (2.2 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at San Pedro by year The wettest five days of the year at San Pedro, 1941 to 2012. The record is 333.7 mm (13.1 in) in 1959, marked on the chart; the median year is 81.6 mm (3.2 in). 0100200300400196019802000Record: 333.7 mm (13.1 in) in 1959
The wettest five days of the year at San Pedro, 1941 to 2012. The record is 333.7 mm (13.1 in) in 1959, marked on the chart; the median year is 81.6 mm (3.2 in).
Wettest five days (Rx5day) at San Pedro by year
YearWettest five days (Rx5day)
19410.0 mm (0.00 in)
194443.7 mm (1.7 in)
194557.4 mm (2.3 in)
194669.9 mm (2.8 in)
194739.5 mm (1.6 in)
1948131.6 mm (5.2 in)
1949260.6 mm (10.3 in)
195038.6 mm (1.5 in)
195171.1 mm (2.8 in)
195259.9 mm (2.4 in)
195345.5 mm (1.8 in)
195435.1 mm (1.4 in)
195559.7 mm (2.4 in)
195675.2 mm (3.0 in)
1957229.4 mm (9.0 in)
1958132.1 mm (5.2 in)
1959333.7 mm (13.1 in)
196094.5 mm (3.7 in)
196181.8 mm (3.2 in)
196234.0 mm (1.3 in)
1963135.6 mm (5.3 in)
196447.0 mm (1.9 in)
196594.7 mm (3.7 in)
1966111.8 mm (4.4 in)
196789.7 mm (3.5 in)
196860.2 mm (2.4 in)
196959.0 mm (2.3 in)
197083.1 mm (3.3 in)
1971124.7 mm (4.9 in)
197281.3 mm (3.2 in)
1973116.9 mm (4.6 in)
197495.0 mm (3.7 in)
197565.6 mm (2.6 in)
197662.7 mm (2.5 in)
197766.6 mm (2.6 in)
1978177.4 mm (7.0 in)
197927.7 mm (1.1 in)
198052.3 mm (2.1 in)
1981109.5 mm (4.3 in)
1982202.7 mm (8.0 in)
1983122.9 mm (4.8 in)
198470.3 mm (2.8 in)
198587.4 mm (3.4 in)
198690.4 mm (3.6 in)
198754.2 mm (2.1 in)
198861.5 mm (2.4 in)
1989101.3 mm (4.0 in)
199059.5 mm (2.3 in)
1991117.6 mm (4.6 in)
199290.6 mm (3.6 in)
1993116.1 mm (4.6 in)
199474.5 mm (2.9 in)
1995105.7 mm (4.2 in)
199667.8 mm (2.7 in)
199763.8 mm (2.5 in)
1998133.9 mm (5.3 in)
199929.2 mm (1.1 in)
2000122.4 mm (4.8 in)
2001326.2 mm (12.8 in)
2002133.9 mm (5.3 in)
2003222.3 mm (8.8 in)
200477.2 mm (3.0 in)
200548.1 mm (1.9 in)
2006152.5 mm (6.0 in)
2007195.8 mm (7.7 in)
2008137.7 mm (5.4 in)
200959.7 mm (2.4 in)
201088.4 mm (3.5 in)
201121.1 mm (0.8 in)
201270.2 mm (2.8 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at San Pedro by year The longest dry spell of the year at San Pedro, 1941 to 2012. The record is 219 days in 1971, marked on the chart; the median year is 160 days. 50100150200250196019802000Record: 219 days in 1971
The longest dry spell of the year at San Pedro, 1941 to 2012. The record is 219 days in 1971, marked on the chart; the median year is 160 days.
Longest dry spell (CDD) at San Pedro by year
YearLongest dry spell (CDD)
1941135 days
194480 days
1945182 days
1946173 days
194798 days
1948121 days
1949184 days
1950175 days
1951178 days
1952108 days
1953185 days
1954171 days
1955190 days
1956157 days
1957118 days
1958197 days
1959118 days
1960195 days
1961189 days
1962210 days
1963180 days
196479 days
1965166 days
1966159 days
1967205 days
1968152 days
196966 days
1970105 days
1971219 days
1972144 days
1973134 days
1974188 days
1975202 days
1976215 days
1977216 days
1978160 days
1979102 days
1980180 days
1981118 days
1982132 days
198397 days
1984140 days
1985185 days
1986115 days
1987107 days
1988199 days
1989123 days
1990142 days
1991158 days
199280 days
1993122 days
1994185 days
1995161 days
199693 days
1997114 days
199894 days
1999172 days
2000108 days
2001116 days
2002168 days
2003182 days
200462 days
2005186 days
2006168 days
2007184 days
2008214 days
200970 days
2010197 days
2011183 days
2012154 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

58 years, 1945 to 2012

A day with at least 58.7 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 244.4 mm (9.6 in) of rain is expected about once in 100 years.

Rainfall return levels at San Pedro: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years58.7 mm (2.3 in)
5 years92.1 mm (3.6 in)
10 years119.7 mm (4.7 in)
25 years162.0 mm (6.4 in)
50 years200.0 mm (7.9 in)
100 years244.4 mm (9.6 in)Longer than the 58 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, 58 years of values from 1945 to 2012.

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: 221.0 mm (8.7 in) in 1949; 200.2 mm (7.9 in) in 2001; 179.8 mm (7.1 in) in 2007.

Download the Data

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