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San Pedro Weather Records (MXN00018032)

Record envelope, standing records and threshold days for San Pedro (MXN00018032), Mexico, with 68 years of record.

Key Facts for San Pedro

  • San Pedro (MXN00018032) is a weather station in Mexico at 21.95 latitude and -105.13 longitude, 29 m (95 ft) above sea level.
  • The station reports from 1946 to 2013, 68 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 tied a daily record high minimum temperature of 18.9 C (66.0 F) on 30 December 2013.

About the Station

  • Location: Mexico, 21.95 latitude, -105.13 longitude.
  • Elevation: 29 m (95 ft).
  • Period of record: 1946 to 2013, 68 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
Jan36.7 C (98.1 F)5.0 C (41.0 F)n/an/a
Feb38.9 C (102.0 F)5.0 C (41.0 F)n/an/a
Mar39.4 C (102.9 F)6.1 C (43.0 F)n/an/a
Apr42.8 C (109.0 F)10.0 C (50.0 F)n/an/a
May41.1 C (106.0 F)10.0 C (50.0 F)n/an/a
Jun42.2 C (108.0 F)14.4 C (57.9 F)n/an/a
Jul41.7 C (107.1 F)17.8 C (64.0 F)n/an/a
Aug36.7 C (98.1 F)20.0 C (68.0 F)n/an/a
Sep37.8 C (100.0 F)18.9 C (66.0 F)n/an/a
Oct38.3 C (100.9 F)13.3 C (55.9 F)n/an/a
Nov38.9 C (102.0 F)10.0 C (50.0 F)n/an/a
Dec38.3 C (100.9 F)5.0 C (41.0 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. 1953 holds the most, with 45. 02040601946: 341947: 401948: 421949: 361950: 221951: 351952: 301953: 451954: 211955: 441956: 261957: 421958: 281959: 201960: 371961: 201962: 261963: 201964: 171965: 301966: 201967: 201968: 251969: 261970: 111971: 281972: 221973: 251974: 171975: 151976: 201977: 211978: 141979: 91980: 191981: 221982: 191983: 121984: 171985: 141986: 231987: 181988: 161989: 211990: 141991: 121992: 171993: 91994: 111995: 201996: 161997: 241998: 121999: 102000: 242001: 222002: 22003: 252004: 212005: 152006: 332007: 292008: 142009: 182010: 172011: 92012: 102013: 111946195319601967197419811988199520022009
1,464 records at San Pedro still stand. 1953 holds the most, with 45.
Standing records at San Pedro by the year they were set
Year setStanding records
194634
194740
194842
194936
195022
195135
195230
195345
195421
195544
195626
195742
195828
195920
196037
196120
196226
196320
196417
196530
196620
196720
196825
196926
197011
197128
197222
197325
197417
197515
197620
197721
197814
19799
198019
198122
198219
198312
198417
198514
198623
198718
198816
198921
199014
199112
199217
19939
199411
199520
199616
199724
199812
199910
200024
200122
20022
200325
200421
200515
200633
200729
200814
200918
201017
20119
201210
201311

All-Time Record Progression

2 new records
When San Pedro set new all-time records 2 all-time records were set at San Pedro between 12 August 1983 and 12 January 1987. Each dot is a new record. Record daily precipitationRecord low maximum temperature12 August 1983: Record daily precipitation 242.3 mm (9.5 in)12 January 1987: Record low maximum temperature 17.2 C (63.0 F)1985
2 all-time records were set at San Pedro between 12 August 1983 and 12 January 1987. Each dot is a new record.
When San Pedro set new all-time records
DateKindDetail
1983-08-12Record daily precipitationRecord daily precipitation 242.3 mm (9.5 in)
1987-01-12Record low maximum temperatureRecord low maximum temperature 17.2 C (63.0 F)

Wettest Day of Each Month

Aug: 242.3 mm (9.5 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 242.3 mm (9.5 in) on 12 August 1983. 0100200300 Jan: 113.3 mm (4.5 in), 12 January 1987 Jan Feb: 47.8 mm (1.9 in), 2 February 2010 Feb Mar: 47.5 mm (1.9 in), 3 March 1968 Mar Apr: 51.6 mm (2.0 in), 13 April 1959 Apr May: 72.9 mm (2.9 in), 27 May 1983 May Jun: 154.9 mm (6.1 in), 7 June 1972 Jun Jul: 174.0 mm (6.9 in), 27 July 1995 Jul Aug: 242.3 mm (9.5 in), 12 August 1983 Aug Sep: 234.4 mm (9.2 in), 22 September 1967 Sep Oct: 129.8 mm (5.1 in), 18 October 1963 Oct Nov: 110.0 mm (4.3 in), 25 November 1982 Nov Dec: 75.9 mm (3.0 in), 13 December 1992 Dec
The wettest day on record for each calendar month at San Pedro. The most was 242.3 mm (9.5 in) on 12 August 1983.
Record daily precipitation for each month at San Pedro
MonthRecord daily precipitation (mm)Date
Jan113.3 mm (4.5 in)12 January 1987
Feb47.8 mm (1.9 in)2 February 2010
Mar47.5 mm (1.9 in)3 March 1968
Apr51.6 mm (2.0 in)13 April 1959
May72.9 mm (2.9 in)27 May 1983
Jun154.9 mm (6.1 in)7 June 1972
Jul174.0 mm (6.9 in)27 July 1995
Aug242.3 mm (9.5 in)12 August 1983
Sep234.4 mm (9.2 in)22 September 1967
Oct129.8 mm (5.1 in)18 October 1963
Nov110.0 mm (4.3 in)25 November 1982
Dec75.9 mm (3.0 in)13 December 1992

Period of Record Coverage

1946 to 2013
Days with data per year at San Pedro 68 years of record at San Pedro, 1946 to 2013. 5 years have data for under 90 percent of days and are left out of rankings: 1946, 1979, 1985, 2002, 2012. 1946: 249 of 365 days1947: 365 of 365 days1948: 366 of 366 days1949: 364 of 365 days1950: 365 of 365 days1951: 365 of 365 days1952: 366 of 366 days1953: 365 of 365 days1954: 365 of 365 days1955: 365 of 365 days1956: 366 of 366 days1957: 365 of 365 days1958: 365 of 365 days1959: 365 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 364 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 365 of 366 days1973: 364 of 365 days1974: 365 of 365 days1975: 365 of 365 days1976: 365 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 213 of 365 days1980: 335 of 366 days1981: 337 of 365 days1982: 365 of 365 days1983: 339 of 365 days1984: 335 of 366 days1985: 273 of 365 days1986: 365 of 365 days1987: 365 of 365 days1988: 366 of 366 days1989: 365 of 365 days1990: 365 of 365 days1991: 365 of 365 days1992: 366 of 366 days1993: 365 of 365 days1994: 365 of 365 days1995: 365 of 365 days1996: 366 of 366 days1997: 365 of 365 days1998: 365 of 365 days1999: 365 of 365 days2000: 366 of 366 days2001: 365 of 365 days2002: 150 of 365 days2003: 341 of 365 days2004: 366 of 366 days2005: 365 of 365 days2006: 336 of 365 days2007: 365 of 365 days2008: 335 of 366 days2009: 334 of 365 days2010: 336 of 365 days2011: 335 of 365 days2012: 304 of 366 days2013: 331 of 365 days1950196019701980199020002010
68 years of record at San Pedro, 1946 to 2013. 5 years have data for under 90 percent of days and are left out of rankings: 1946, 1979, 1985, 2002, 2012.
Days with data per year at San Pedro
YearDays with dataShare of yearComplete
194624968%No
1947365100%Yes
1948366100%Yes
1949364100%Yes
1950365100%Yes
1951365100%Yes
1952366100%Yes
1953365100%Yes
1954365100%Yes
1955365100%Yes
1956366100%Yes
1957365100%Yes
1958365100%Yes
1959365100%Yes
1960366100%Yes
1961365100%Yes
1962365100%Yes
1963365100%Yes
1964366100%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
1968366100%Yes
1969364100%Yes
1970365100%Yes
1971365100%Yes
1972365100%Yes
1973364100%Yes
1974365100%Yes
1975365100%Yes
1976365100%Yes
1977365100%Yes
1978365100%Yes
197921358%No
198033592%Yes
198133792%Yes
1982365100%Yes
198333993%Yes
198433592%Yes
198527375%No
1986365100%Yes
1987365100%Yes
1988366100%Yes
1989365100%Yes
1990365100%Yes
1991365100%Yes
1992366100%Yes
1993365100%Yes
1994365100%Yes
1995365100%Yes
1996366100%Yes
1997365100%Yes
1998365100%Yes
1999365100%Yes
2000366100%Yes
2001365100%Yes
200215041%No
200334193%Yes
2004366100%Yes
2005365100%Yes
200633692%Yes
2007365100%Yes
200833592%Yes
200933492%Yes
201033692%Yes
201133592%Yes
201230483%No
201333191%Yes

Latest Records

20
Latest records at San Pedro
DateStationRecordValueBeat old record byOld record stoodSignificance
30 December 2013San Pedro, MXdaily high min (Tie)18.9 C (66.0 F)tie64 years6 of 100 (Routine)
20 December 2013San Pedro, MXdaily rain10.2 mm (0.4 in)1.1 mm (0.04 in)16 years10 of 100 (Routine)
7 November 2013San Pedro, MXdaily rain (Tie)3.3 mm (0.13 in)tie16 years2 of 100 (Routine)
6 November 2013San Pedro, MXdaily rain3.6 mm (0.14 in)3.1 mm (0.12 in)16 years11 of 100 (Routine)
4 November 2013San Pedro, MXdaily rain35.8 mm (1.4 in)8.1 mm (0.32 in)51 years25 of 100 (Routine)
2 November 2013San Pedro, MXdaily high min23.9 C (75.0 F)1.1 C (2.0 F)66 years29 of 100 (Routine)
31 October 2013San Pedro, MXdaily low max28.9 C (84.0 F)0.5 C (0.9 F)52 years23 of 100 (Routine)
23 October 2013San Pedro, MXdaily rain26.7 mm (1.1 in)24.7 mm (1.0 in)38 years29 of 100 (Routine)
13 October 2013San Pedro, MXdaily high max (Tie)35.0 C (95.0 F)tie52 years5 of 100 (Routine)
27 September 2013San Pedro, MXdaily rain62.0 mm (2.4 in)2.8 mm (0.11 in)2 years7 of 100 (Routine)
21 September 2013San Pedro, MXdaily high min (Tie)25.0 C (77.0 F)tie60 years6 of 100 (Routine)
14 September 2013San Pedro, MXdaily high max35.0 C (95.0 F)1.1 C (2.0 F)47 years27 of 100 (Routine)
13 September 2013San Pedro, MXdaily high max (Tie)35.0 C (95.0 F)tie8 years2 of 100 (Routine)
12 September 2013San Pedro, MXdaily high max (Tie)35.0 C (95.0 F)tie60 years6 of 100 (Routine)
8 September 2013San Pedro, MXdaily low max25.0 C (77.0 F)1.1 C (2.0 F)3 years13 of 100 (Routine)
5 September 2013San Pedro, MXdaily low max25.6 C (78.1 F)1.1 C (2.0 F)24 years20 of 100 (Routine)
2 September 2013San Pedro, MXdaily low min (Tie)21.7 C (71.1 F)tie63 years6 of 100 (Routine)
31 August 2013San Pedro, MXdaily low min21.1 C (70.0 F)0.6 C (1.1 F)36 years22 of 100 (Routine)
21 August 2013San Pedro, MXdaily low max (Tie)28.9 C (84.0 F)tie24 years3 of 100 (Routine)
18 August 2013San Pedro, MXdaily high min (Tie)25.0 C (77.0 F)tie62 years6 of 100 (Routine)

Climate Trend

52 complete years, 1947 to 2007
Annual mean temperature at San Pedro as warming stripes, 1947 to 2007 One stripe for each of 52 complete years at San Pedro, 1947 to 2007. Blue stripes are years cooler than the station's own mean of 25.4 C (77.8 F); red stripes are warmer. The coolest year was 1999, at 24.8 C (76.6 F), and the warmest was 1948, at 26.0 C (78.9 F). The strongest colour marks a difference of 0.7 C (1.3 F). 1947: 25.5 C, 0.0 C from the station mean1948: 26.0 C, +0.6 C from the station mean1949: 25.1 C, -0.3 C from the station mean1950: 25.6 C, +0.2 C from the station mean1951: 25.6 C, +0.1 C from the station mean1952: 25.6 C, +0.1 C from the station mean1953: 25.6 C, +0.2 C from the station mean1954: 26.0 C, +0.6 C from the station mean1955: 24.9 C, -0.5 C from the station mean1956: 25.5 C, 0.0 C from the station mean1957: 25.9 C, +0.5 C from the station mean1958: 25.6 C, +0.1 C from the station mean1959: 25.6 C, +0.1 C from the station mean1960: 25.2 C, -0.2 C from the station mean1961: 25.1 C, -0.4 C from the station mean1962: 25.2 C, -0.2 C from the station mean1963: 25.5 C, 0.0 C from the station mean1964: 25.0 C, -0.4 C from the station mean1965: 25.6 C, +0.2 C from the station mean1966: 25.6 C, +0.1 C from the station mean1967: 25.4 C, 0.0 C from the station mean1968: 25.3 C, -0.1 C from the station mean1969: 25.5 C, 0.0 C from the station mean1970: 25.2 C, -0.2 C from the station mean1971: 25.2 C, -0.2 C from the station mean1972: 25.8 C, +0.3 C from the station mean1973: 25.2 C, -0.3 C from the station mean1974: 25.1 C, -0.3 C from the station mean1975: 25.1 C, -0.3 C from the station mean1976: 25.4 C, -0.1 C from the station mean1977: 25.4 C, 0.0 C from the station mean1978: 25.8 C, +0.3 C from the station mean1982: 25.9 C, +0.4 C from the station mean1986: 25.5 C, +0.1 C from the station mean1987: 25.2 C, -0.2 C from the station mean1988: 25.3 C, -0.1 C from the station mean1989: 25.6 C, +0.2 C from the station mean1990: 26.0 C, +0.6 C from the station mean1991: 25.6 C, +0.2 C from the station mean1992: 25.4 C, 0.0 C from the station mean1993: 25.2 C, -0.3 C from the station mean1994: 25.7 C, +0.3 C from the station mean1995: 25.5 C, +0.1 C from the station mean1996: 25.7 C, +0.2 C from the station mean1997: 25.2 C, -0.2 C from the station mean1998: 25.0 C, -0.4 C from the station mean1999: 24.8 C, -0.7 C from the station mean2000: 24.8 C, -0.6 C from the station mean2001: 25.2 C, -0.3 C from the station mean2004: 25.7 C, +0.3 C from the station mean2005: 25.7 C, +0.2 C from the station mean2007: 25.8 C, +0.3 C from the station mean194719601970198019902000
One stripe for each of 52 complete years at San Pedro, 1947 to 2007. Blue stripes are years cooler than the station's own mean of 25.4 C (77.8 F); red stripes are warmer. The coolest year was 1999, at 24.8 C (76.6 F), and the warmest was 1948, at 26.0 C (78.9 F). The strongest colour marks a difference of 0.7 C (1.3 F).
Annual mean temperature at San Pedro as warming stripes, 1947 to 2007
YearAnnual mean temperatureDifference from the station mean
194725.5 C+0.03 C
194826.0 C+0.59 C
194925.1 C-0.34 C
195025.6 C+0.18 C
195125.6 C+0.12 C
195225.6 C+0.11 C
195325.6 C+0.16 C
195426.0 C+0.56 C
195524.9 C-0.51 C
195625.5 C+0.05 C
195725.9 C+0.48 C
195825.6 C+0.11 C
195925.6 C+0.15 C
196025.2 C-0.23 C
196125.1 C-0.36 C
196225.2 C-0.20 C
196325.5 C+0.04 C
196425.0 C-0.40 C
196525.6 C+0.19 C
196625.6 C+0.11 C
196725.4 C-0.02 C
196825.3 C-0.11 C
196925.5 C+0.01 C
197025.2 C-0.24 C
197125.2 C-0.24 C
197225.8 C+0.34 C
197325.2 C-0.27 C
197425.1 C-0.32 C
197525.1 C-0.32 C
197625.4 C-0.05 C
197725.4 C-0.01 C
197825.8 C+0.31 C
198225.9 C+0.43 C
198625.5 C+0.07 C
198725.2 C-0.24 C
198825.3 C-0.11 C
198925.6 C+0.16 C
199026.0 C+0.56 C
199125.6 C+0.18 C
199225.4 C-0.03 C
199325.2 C-0.26 C
199425.7 C+0.29 C
199525.5 C+0.09 C
199625.7 C+0.24 C
199725.2 C-0.23 C
199825.0 C-0.44 C
199924.8 C-0.65 C
200024.8 C-0.62 C
200125.2 C-0.25 C
200425.7 C+0.29 C
200525.7 C+0.25 C
200725.8 C+0.35 C

The fitted trend in annual mean temperature here over 1947 to 2007 is -0.02 C (-0.06 to 0.03) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.03 F (-0.12 to 0.06) per decade. The slope is a straight line fitted to 52 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 temperature-0.02 C (-0.06 to 0.03) per decade-0.03 F (-0.12 to 0.06) per decade1947 to 200752Not clearly different from zero
Mean daily maximum0.1 C (0.1 to 0.2) per decade0.2 F (0.1 to 0.3) per decade1947 to 200752Rise
Mean daily minimum-0.2 C (-0.2 to -0.1) per decade-0.3 F (-0.4 to -0.2) per decade1947 to 200752Fall

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

1946 to 2013
Yearly extremes at San Pedro: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)42.8 C (109.0 F)195438.3 C (100.9 F)68
Coldest night (TNn)5.0 C (41.0 F)19559.2 C (48.5 F)68
Wettest day (Rx1day)242.3 mm (9.5 in)1983118.6 mm (4.7 in)68
Wettest five days (Rx5day)536.2 mm (21.1 in)2011207.6 mm (8.2 in)68
Longest dry spell (CDD)177 days1982120 days68

Hottest day (TXx)

Hottest day (TXx) at San Pedro by year The hottest day of the year at San Pedro, 1946 to 2013. The record is 42.8 C (109.0 F) in 1954, marked on the chart; the median year is 38.3 C (100.9 F). 3638404244196019802000Record: 42.8 C (109.0 F) in 1954
The hottest day of the year at San Pedro, 1946 to 2013. The record is 42.8 C (109.0 F) in 1954, marked on the chart; the median year is 38.3 C (100.9 F).
Hottest day (TXx) at San Pedro by year
YearHottest day (TXx)
194640.0 C (104.0 F)
194737.2 C (99.0 F)
194840.0 C (104.0 F)
194937.8 C (100.0 F)
195037.8 C (100.0 F)
195138.9 C (102.0 F)
195238.3 C (100.9 F)
195339.4 C (102.9 F)
195442.8 C (109.0 F)
195540.0 C (104.0 F)
195638.3 C (100.9 F)
195738.3 C (100.9 F)
195839.4 C (102.9 F)
195937.2 C (99.0 F)
196038.3 C (100.9 F)
196137.8 C (100.0 F)
196238.9 C (102.0 F)
196338.9 C (102.0 F)
196438.9 C (102.0 F)
196539.4 C (102.9 F)
196637.8 C (100.0 F)
196738.3 C (100.9 F)
196836.1 C (97.0 F)
196940.0 C (104.0 F)
197040.6 C (105.1 F)
197138.9 C (102.0 F)
197238.9 C (102.0 F)
197337.2 C (99.0 F)
197437.8 C (100.0 F)
197538.3 C (100.9 F)
197637.8 C (100.0 F)
197736.7 C (98.1 F)
197839.4 C (102.9 F)
197937.8 C (100.0 F)
198039.4 C (102.9 F)
198137.8 C (100.0 F)
198237.8 C (100.0 F)
198338.3 C (100.9 F)
198441.1 C (106.0 F)
198537.8 C (100.0 F)
198638.3 C (100.9 F)
198738.9 C (102.0 F)
198838.3 C (100.9 F)
198937.8 C (100.0 F)
199038.3 C (100.9 F)
199138.9 C (102.0 F)
199239.4 C (102.9 F)
199337.2 C (99.0 F)
199440.0 C (104.0 F)
199538.3 C (100.9 F)
199637.8 C (100.0 F)
199740.0 C (104.0 F)
199839.4 C (102.9 F)
199938.3 C (100.9 F)
200037.2 C (99.0 F)
200137.8 C (100.0 F)
200238.3 C (100.9 F)
200338.9 C (102.0 F)
200438.9 C (102.0 F)
200538.3 C (100.9 F)
200642.2 C (108.0 F)
200740.0 C (104.0 F)
200837.8 C (100.0 F)
200938.9 C (102.0 F)
201038.3 C (100.9 F)
201137.8 C (100.0 F)
201238.9 C (102.0 F)
201337.8 C (100.0 F)

Coldest night (TNn)

Coldest night (TNn) at San Pedro by year The coldest night of the year at San Pedro, 1946 to 2013. The record is 5.0 C (41.0 F) in 1955, marked on the chart; the median year is 9.2 C (48.5 F). 4681012196019802000Record: 5.0 C (41.0 F) in 1955
The coldest night of the year at San Pedro, 1946 to 2013. The record is 5.0 C (41.0 F) in 1955, marked on the chart; the median year is 9.2 C (48.5 F).
Coldest night (TNn) at San Pedro by year
YearColdest night (TNn)
194610.6 C (51.1 F)
19476.7 C (44.1 F)
194810.0 C (50.0 F)
19498.9 C (48.0 F)
19507.8 C (46.0 F)
19517.2 C (45.0 F)
19527.8 C (46.0 F)
19538.9 C (48.0 F)
195410.6 C (51.1 F)
19555.0 C (41.0 F)
19567.8 C (46.0 F)
19577.8 C (46.0 F)
19587.8 C (46.0 F)
19597.8 C (46.0 F)
19605.0 C (41.0 F)
19619.4 C (48.9 F)
19628.3 C (46.9 F)
19638.3 C (46.9 F)
19649.4 C (48.9 F)
19657.8 C (46.0 F)
19667.8 C (46.0 F)
19677.8 C (46.0 F)
196810.0 C (50.0 F)
19696.1 C (43.0 F)
197010.0 C (50.0 F)
19717.2 C (45.0 F)
197210.0 C (50.0 F)
197310.0 C (50.0 F)
19747.8 C (46.0 F)
19759.4 C (48.9 F)
19768.9 C (48.0 F)
197710.6 C (51.1 F)
197811.1 C (52.0 F)
19798.9 C (48.0 F)
198010.0 C (50.0 F)
198111.7 C (53.1 F)
198210.0 C (50.0 F)
19839.4 C (48.9 F)
198410.0 C (50.0 F)
19858.3 C (46.9 F)
198610.0 C (50.0 F)
19878.3 C (46.9 F)
19885.6 C (42.1 F)
198910.0 C (50.0 F)
19908.9 C (48.0 F)
19919.4 C (48.9 F)
199210.6 C (51.1 F)
19938.9 C (48.0 F)
199410.6 C (51.1 F)
199510.0 C (50.0 F)
199611.1 C (52.0 F)
19975.0 C (41.0 F)
19989.4 C (48.9 F)
19999.4 C (48.9 F)
200010.0 C (50.0 F)
20017.8 C (46.0 F)
200210.0 C (50.0 F)
200310.6 C (51.1 F)
20048.9 C (48.0 F)
200510.0 C (50.0 F)
20066.1 C (43.0 F)
20077.8 C (46.0 F)
20088.3 C (46.9 F)
200910.6 C (51.1 F)
201011.1 C (52.0 F)
20116.7 C (44.1 F)
201211.7 C (53.1 F)
201310.0 C (50.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at San Pedro by year The wettest day of the year at San Pedro, 1946 to 2013. The record is 242.3 mm (9.5 in) in 1983, marked on the chart; the median year is 118.6 mm (4.7 in). 0100200300196019802000Record: 242.3 mm (9.5 in) in 1983
The wettest day of the year at San Pedro, 1946 to 2013. The record is 242.3 mm (9.5 in) in 1983, marked on the chart; the median year is 118.6 mm (4.7 in).
Wettest day (Rx1day) at San Pedro by year
YearWettest day (Rx1day)
194691.9 mm (3.6 in)
194768.3 mm (2.7 in)
1948126.5 mm (5.0 in)
1949114.0 mm (4.5 in)
1950199.9 mm (7.9 in)
195183.8 mm (3.3 in)
1952117.9 mm (4.6 in)
195370.9 mm (2.8 in)
1954126.7 mm (5.0 in)
1955135.9 mm (5.4 in)
1956114.0 mm (4.5 in)
1957111.3 mm (4.4 in)
1958132.3 mm (5.2 in)
195990.7 mm (3.6 in)
196086.1 mm (3.4 in)
1961126.2 mm (5.0 in)
1962138.7 mm (5.5 in)
1963129.8 mm (5.1 in)
1964100.6 mm (4.0 in)
196584.8 mm (3.3 in)
1966119.1 mm (4.7 in)
1967234.4 mm (9.2 in)
1968114.3 mm (4.5 in)
1969172.0 mm (6.8 in)
1970120.7 mm (4.8 in)
1971101.9 mm (4.0 in)
1972154.9 mm (6.1 in)
1973121.4 mm (4.8 in)
1974142.0 mm (5.6 in)
1975118.1 mm (4.6 in)
1976120.7 mm (4.8 in)
197772.6 mm (2.9 in)
1978126.5 mm (5.0 in)
197919.8 mm (0.8 in)
1980103.1 mm (4.1 in)
198168.8 mm (2.7 in)
1982110.0 mm (4.3 in)
1983242.3 mm (9.5 in)
1984150.9 mm (5.9 in)
198575.9 mm (3.0 in)
1986119.9 mm (4.7 in)
1987113.3 mm (4.5 in)
1988160.8 mm (6.3 in)
1989176.3 mm (6.9 in)
199083.3 mm (3.3 in)
1991106.9 mm (4.2 in)
1992120.9 mm (4.8 in)
1993120.4 mm (4.7 in)
1994120.4 mm (4.7 in)
1995174.0 mm (6.9 in)
1996110.0 mm (4.3 in)
199797.0 mm (3.8 in)
1998119.1 mm (4.7 in)
1999125.0 mm (4.9 in)
2000105.7 mm (4.2 in)
200168.8 mm (2.7 in)
200241.4 mm (1.6 in)
2003100.3 mm (3.9 in)
2004107.2 mm (4.2 in)
2005146.6 mm (5.8 in)
2006101.1 mm (4.0 in)
2007102.9 mm (4.1 in)
2008119.9 mm (4.7 in)
200994.5 mm (3.7 in)
2010188.5 mm (7.4 in)
2011202.9 mm (8.0 in)
2012137.4 mm (5.4 in)
2013119.9 mm (4.7 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at San Pedro by year The wettest five days of the year at San Pedro, 1946 to 2013. The record is 536.2 mm (21.1 in) in 2011, marked on the chart; the median year is 207.6 mm (8.2 in). 0200400600196019802000Record: 536.2 mm (21.1 in) in 2011
The wettest five days of the year at San Pedro, 1946 to 2013. The record is 536.2 mm (21.1 in) in 2011, marked on the chart; the median year is 207.6 mm (8.2 in).
Wettest five days (Rx5day) at San Pedro by year
YearWettest five days (Rx5day)
1946206.7 mm (8.1 in)
1947137.4 mm (5.4 in)
1948285.6 mm (11.2 in)
1949132.5 mm (5.2 in)
1950351.6 mm (13.8 in)
1951170.1 mm (6.7 in)
1952185.4 mm (7.3 in)
1953158.7 mm (6.2 in)
1954198.1 mm (7.8 in)
1955304.6 mm (12.0 in)
1956190.3 mm (7.5 in)
1957202.2 mm (8.0 in)
1958283.5 mm (11.2 in)
1959167.7 mm (6.6 in)
1960155.2 mm (6.1 in)
1961195.1 mm (7.7 in)
1962206.3 mm (8.1 in)
1963290.6 mm (11.4 in)
1964248.4 mm (9.8 in)
1965196.6 mm (7.7 in)
1966163.5 mm (6.4 in)
1967320.7 mm (12.6 in)
1968231.4 mm (9.1 in)
1969423.2 mm (16.7 in)
1970228.2 mm (9.0 in)
1971209.4 mm (8.2 in)
1972218.4 mm (8.6 in)
1973293.6 mm (11.6 in)
1974261.6 mm (10.3 in)
1975260.3 mm (10.2 in)
1976281.5 mm (11.1 in)
1977145.8 mm (5.7 in)
1978234.5 mm (9.2 in)
197927.9 mm (1.1 in)
1980190.0 mm (7.5 in)
1981218.5 mm (8.6 in)
1982140.7 mm (5.5 in)
1983282.2 mm (11.1 in)
1984214.1 mm (8.4 in)
1985147.6 mm (5.8 in)
1986187.7 mm (7.4 in)
1987182.9 mm (7.2 in)
1988281.2 mm (11.1 in)
1989178.9 mm (7.0 in)
1990253.5 mm (10.0 in)
1991168.9 mm (6.6 in)
1992191.6 mm (7.5 in)
1993240.8 mm (9.5 in)
1994275.6 mm (10.9 in)
1995230.4 mm (9.1 in)
1996229.3 mm (9.0 in)
1997201.5 mm (7.9 in)
1998240.8 mm (9.5 in)
1999295.1 mm (11.6 in)
2000156.2 mm (6.1 in)
2001129.8 mm (5.1 in)
200241.4 mm (1.6 in)
2003241.2 mm (9.5 in)
2004251.8 mm (9.9 in)
2005198.4 mm (7.8 in)
2006176.8 mm (7.0 in)
2007147.8 mm (5.8 in)
2008188.8 mm (7.4 in)
2009187.0 mm (7.4 in)
2010360.9 mm (14.2 in)
2011536.2 mm (21.1 in)
2012224.1 mm (8.8 in)
2013208.5 mm (8.2 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at San Pedro by year The longest dry spell of the year at San Pedro, 1946 to 2013. The record is 177 days in 1982, marked on the chart; the median year is 120 days. 050100150200196019802000Record: 177 days in 1982
The longest dry spell of the year at San Pedro, 1946 to 2013. The record is 177 days in 1982, marked on the chart; the median year is 120 days.
Longest dry spell (CDD) at San Pedro by year
YearLongest dry spell (CDD)
194671 days
194779 days
1948110 days
1949118 days
1950159 days
195199 days
1952109 days
1953113 days
1954163 days
1955158 days
1956118 days
195796 days
195872 days
195998 days
1960152 days
196170 days
1962134 days
1963102 days
196490 days
1965148 days
196671 days
1967153 days
1968107 days
1969110 days
1970119 days
1971167 days
1972155 days
1973121 days
1974146 days
1975136 days
1976163 days
197780 days
1978112 days
1979101 days
198076 days
198196 days
1982177 days
1983113 days
1984135 days
1985124 days
1986131 days
1987124 days
1988100 days
1989176 days
1990107 days
1991175 days
199295 days
1993143 days
199493 days
1995168 days
1996155 days
199747 days
1998123 days
1999168 days
2000157 days
200193 days
2002107 days
2003120 days
2004138 days
2005108 days
2006170 days
2007126 days
2008129 days
2009136 days
2010119 days
2011140 days
2012121 days
201360 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

63 years, 1947 to 2013

A day with at least 116.1 mm (4.6 in) of rain is expected about once in 2 years. A day with at least 244.8 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 years116.1 mm (4.6 in)
5 years147.5 mm (5.8 in)
10 years169.4 mm (6.7 in)
25 years198.6 mm (7.8 in)
50 years221.3 mm (8.7 in)
100 years244.8 mm (9.6 in)Longer than the 63 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, 63 years of values from 1947 to 2013.

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: 242.3 mm (9.5 in) in 1983; 234.4 mm (9.2 in) in 1967; 202.9 mm (8.0 in) in 2011.

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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2025-12-31).