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San Antonio Arroyo Prieto (Cf Weather Records (MXN00021069)

Record envelope, standing records and threshold days for San Antonio Arroyo Prieto (Cf (MXN00021069), Mexico, with 58 years of record.

Key Facts for San Antonio Arroyo Prieto (Cf

  • San Antonio Arroyo Prieto (Cf (MXN00021069) is a weather station in Mexico at 19.53 latitude and -97.82 longitude, 3,065 m (10,055 ft) above sea level.
  • The station reports from 1952 to 2009, 58 years of record.
  • 1,464 records set at San Antonio Arroyo Prieto (Cf still stand.
  • Records are tracked for prcp: an element needs 30 years of data to be eligible.
  • San Antonio Arroyo Prieto (Cf set a daily record precipitation of 29.0 mm (1.1 in) on 24 September 2009.

About the Station

  • Location: Mexico, 19.53 latitude, -97.82 longitude.
  • Elevation: 3,065 m (10,055 ft).
  • Period of record: 1952 to 2009, 58 years.
  • Eligible elements: prcp.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at San Antonio Arroyo Prieto (Cf, with 2026 drawn through them The band shows the record high and record low for each calendar day at San Antonio Arroyo Prieto (Cf. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -100102030 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at San Antonio Arroyo Prieto (Cf. 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 Antonio Arroyo Prieto (Cf, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan25.6 C (78.1 F)-5.0 C (23.0 F)n/an/a
Feb20.6 C (69.1 F)-5.0 C (23.0 F)n/an/a
Mar22.8 C (73.0 F)-6.1 C (21.0 F)n/an/a
Apr25.6 C (78.1 F)0.0 C (32.0 F)n/an/a
May29.4 C (84.9 F)0.0 C (32.0 F)n/an/a
Jun24.4 C (75.9 F)1.1 C (34.0 F)n/an/a
Jul22.8 C (73.0 F)0.6 C (33.1 F)n/an/a
Aug20.6 C (69.1 F)1.1 C (34.0 F)n/an/a
Sep20.6 C (69.1 F)0.0 C (32.0 F)n/an/a
Oct18.9 C (66.0 F)-5.0 C (23.0 F)n/an/a
Nov20.0 C (68.0 F)-3.3 C (26.1 F)n/an/a
Dec20.0 C (68.0 F)-5.0 C (23.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at San Antonio Arroyo Prieto (Cf by the year they were set 1,464 records at San Antonio Arroyo Prieto (Cf still stand. 1980 holds the most, with 186. 0501001502001961: 171963: 281980: 1861981: 781982: 601983: 751984: 911985: 611986: 431987: 821988: 481989: 301990: 201991: 341992: 391993: 621994: 291995: 421996: 141997: 281998: 1041999: 252000: 252002: 182003: 592004: 122005: 382006: 242007: 222008: 292009: 4119611982198619901994199820032007
1,464 records at San Antonio Arroyo Prieto (Cf still stand. 1980 holds the most, with 186.
Standing records at San Antonio Arroyo Prieto (Cf by the year they were set
Year setStanding records
196117
196328
1980186
198178
198260
198375
198491
198561
198643
198782
198848
198930
199020
199134
199239
199362
199429
199542
199614
199728
1998104
199925
200025
200218
200359
200412
200538
200624
200722
200829
200941

All-Time Record Progression

1 new records
When San Antonio Arroyo Prieto (Cf set new all-time records 1 all-time records were set at San Antonio Arroyo Prieto (Cf between 30 June 2009 and 30 June 2009. Each dot is a new record. Record daily precipitation30 June 2009: Record daily precipitation 169.2 mm (6.7 in)2010
1 all-time records were set at San Antonio Arroyo Prieto (Cf between 30 June 2009 and 30 June 2009. Each dot is a new record.
When San Antonio Arroyo Prieto (Cf set new all-time records
DateKindDetail
2009-06-30Record daily precipitationRecord daily precipitation 169.2 mm (6.7 in)

Wettest Day of Each Month

Jun: 169.2 mm (6.7 in)
Record daily precipitation for each month at San Antonio Arroyo Prieto (Cf The wettest day on record for each calendar month at San Antonio Arroyo Prieto (Cf. The most was 169.2 mm (6.7 in) on 30 June 2009. 050100150200 Jan: 33.0 mm (1.3 in), 22 January 1965 Jan Feb: 35.6 mm (1.4 in), 4 February 1975 Feb Mar: 27.9 mm (1.1 in), 26 March 1978 Mar Apr: 58.4 mm (2.3 in), 13 April 1985 Apr May: 56.9 mm (2.2 in), 2 May 1967 May Jun: 169.2 mm (6.7 in), 30 June 2009 Jun Jul: 65.3 mm (2.6 in), 18 July 1997 Jul Aug: 82.3 mm (3.2 in), 22 August 2007 Aug Sep: 95.8 mm (3.8 in), 20 September 1974 Sep Oct: 81.8 mm (3.2 in), 17 October 1974 Oct Nov: 40.6 mm (1.6 in), 6 November 1958 Nov Dec: 55.4 mm (2.2 in), 1 December 1967 Dec
The wettest day on record for each calendar month at San Antonio Arroyo Prieto (Cf. The most was 169.2 mm (6.7 in) on 30 June 2009.
Record daily precipitation for each month at San Antonio Arroyo Prieto (Cf
MonthRecord daily precipitation (mm)Date
Jan33.0 mm (1.3 in)22 January 1965
Feb35.6 mm (1.4 in)4 February 1975
Mar27.9 mm (1.1 in)26 March 1978
Apr58.4 mm (2.3 in)13 April 1985
May56.9 mm (2.2 in)2 May 1967
Jun169.2 mm (6.7 in)30 June 2009
Jul65.3 mm (2.6 in)18 July 1997
Aug82.3 mm (3.2 in)22 August 2007
Sep95.8 mm (3.8 in)20 September 1974
Oct81.8 mm (3.2 in)17 October 1974
Nov40.6 mm (1.6 in)6 November 1958
Dec55.4 mm (2.2 in)1 December 1967

Period of Record Coverage

1961 to 2009
Days with data per year at San Antonio Arroyo Prieto (Cf 31 years of record at San Antonio Arroyo Prieto (Cf, 1961 to 2009. 11 years have data for under 90 percent of days and are left out of rankings: 1961, 1963, 1980, 1987, 1996, 1997, 2002, 2004 and others. 1961: 31 of 365 days1963: 30 of 365 days1980: 304 of 366 days1981: 364 of 365 days1982: 365 of 365 days1983: 364 of 365 days1984: 366 of 366 days1985: 365 of 365 days1986: 364 of 365 days1987: 272 of 365 days1988: 365 of 366 days1989: 365 of 365 days1990: 334 of 365 days1991: 365 of 365 days1992: 366 of 366 days1993: 335 of 365 days1994: 365 of 365 days1995: 365 of 365 days1996: 274 of 366 days1997: 275 of 365 days1998: 362 of 365 days1999: 363 of 365 days2000: 366 of 366 days2002: 182 of 365 days2003: 365 of 365 days2004: 151 of 366 days2005: 273 of 365 days2006: 274 of 365 days2007: 334 of 365 days2008: 334 of 366 days2009: 272 of 365 days198019851990199520002005
31 years of record at San Antonio Arroyo Prieto (Cf, 1961 to 2009. 11 years have data for under 90 percent of days and are left out of rankings: 1961, 1963, 1980, 1987, 1996, 1997, 2002, 2004 and others.
Days with data per year at San Antonio Arroyo Prieto (Cf
YearDays with dataShare of yearComplete
1961318%No
1963308%No
198030483%No
1981364100%Yes
1982365100%Yes
1983364100%Yes
1984366100%Yes
1985365100%Yes
1986364100%Yes
198727275%No
1988365100%Yes
1989365100%Yes
199033492%Yes
1991365100%Yes
1992366100%Yes
199333592%Yes
1994365100%Yes
1995365100%Yes
199627475%No
199727575%No
199836299%Yes
199936399%Yes
2000366100%Yes
200218250%No
2003365100%Yes
200415141%No
200527375%No
200627475%No
200733492%Yes
200833491%Yes
200927275%No

Latest Records

20
Latest records at San Antonio Arroyo Prieto (Cf
DateStationRecordValueBeat old record byOld record stoodSignificance
24 September 2009San Antonio Arroyo Prieto (Cf, MXdaily rain29.0 mm (1.1 in)8.7 mm (0.34 in)28 years21 of 100 (Routine)
30 August 2009San Antonio Arroyo Prieto (Cf, MXdaily rain (Tie)17.8 mm (0.7 in)tie40 years4 of 100 (Routine)
30 June 2009San Antonio Arroyo Prieto (Cf, MXall-time rain169.2 mm (6.7 in)73.4 mm (2.9 in)34 years75 of 100 (Major)
29 June 2009San Antonio Arroyo Prieto (Cf, MXdaily rain38.9 mm (1.5 in)7.9 mm (0.31 in)6 years13 of 100 (Routine)
13 May 2009San Antonio Arroyo Prieto (Cf, MXdaily rain48.8 mm (1.9 in)17.0 mm (0.7 in)32 years33 of 100 (Routine)
22 February 2009San Antonio Arroyo Prieto (Cf, MXdaily rain19.1 mm (0.8 in)12.5 mm (0.5 in)52 years20 of 100 (Routine)
15 September 2008San Antonio Arroyo Prieto (Cf, MXdaily rain32.3 mm (1.3 in)12.5 mm (0.5 in)19 years21 of 100 (Routine)
13 July 2008San Antonio Arroyo Prieto (Cf, MXdaily rain (Tie)18.0 mm (0.7 in)tie25 years3 of 100 (Routine)
5 June 2008San Antonio Arroyo Prieto (Cf, MXmonthly rain (Tie)63.0 mm (2.5 in)tie29 years5 of 100 (Routine)
29 April 2008San Antonio Arroyo Prieto (Cf, MXdaily rain20.6 mm (0.8 in)5.1 mm (0.20 in)22 years17 of 100 (Routine)
3 January 2008San Antonio Arroyo Prieto (Cf, MXdaily rain6.9 mm (0.27 in)1.8 mm (0.07 in)16 years12 of 100 (Routine)
1 January 2008San Antonio Arroyo Prieto (Cf, MXdaily rain8.4 mm (0.33 in)3.8 mm (0.15 in)33 years20 of 100 (Routine)
21 October 2007San Antonio Arroyo Prieto (Cf, MXdaily rain21.1 mm (0.8 in)7.1 mm (0.28 in)34 years20 of 100 (Routine)
9 October 2007San Antonio Arroyo Prieto (Cf, MXdaily rain40.4 mm (1.6 in)11.7 mm (0.5 in)40 years29 of 100 (Routine)
22 August 2007San Antonio Arroyo Prieto (Cf, MXmonthly rain82.3 mm (3.2 in)19.8 mm (0.8 in)27 years45 of 100 (Notable)
24 July 2007San Antonio Arroyo Prieto (Cf, MXdaily rain46.5 mm (1.8 in)4.3 mm (0.17 in)36 years20 of 100 (Routine)
16 June 2007San Antonio Arroyo Prieto (Cf, MXdaily rain43.4 mm (1.7 in)10.9 mm (0.4 in)4 years16 of 100 (Routine)
3 February 2007San Antonio Arroyo Prieto (Cf, MXdaily rain33.5 mm (1.3 in)27.9 mm (1.1 in)31 years54 of 100 (Notable)
27 January 2007San Antonio Arroyo Prieto (Cf, MXdaily rain2.3 mm (0.09 in)1.5 mm (0.06 in)16 years11 of 100 (Routine)
26 January 2007San Antonio Arroyo Prieto (Cf, MXdaily rain9.4 mm (0.37 in)2.8 mm (0.11 in)16 years12 of 100 (Routine)

Climate Trend

15 complete years, 1981 to 2003
Annual mean temperature at San Antonio Arroyo Prieto (Cf as warming stripes, 1981 to 2003 One stripe for each of 15 complete years at San Antonio Arroyo Prieto (Cf, 1981 to 2003. Blue stripes are years cooler than the station's own mean of 9.6 C (49.3 F); red stripes are warmer. The coolest year was 1984, at 8.3 C (46.9 F), and the warmest was 1995, at 11.0 C (51.9 F). The strongest colour marks a difference of 1.5 C (2.7 F). 1981: 8.3 C, -1.3 C from the station mean1982: 9.2 C, -0.4 C from the station mean1983: 9.3 C, -0.3 C from the station mean1984: 8.3 C, -1.3 C from the station mean1985: 8.5 C, -1.1 C from the station mean1986: 9.8 C, +0.2 C from the station mean1988: 9.6 C, 0.0 C from the station mean1989: 9.4 C, -0.2 C from the station mean1991: 10.5 C, +0.9 C from the station mean1992: 9.8 C, +0.2 C from the station mean1994: 10.9 C, +1.3 C from the station mean1995: 11.0 C, +1.4 C from the station mean1999: 9.5 C, -0.1 C from the station mean2000: 9.8 C, +0.2 C from the station mean2003: 10.0 C, +0.4 C from the station mean19811984198619881990199219941996199820002002
One stripe for each of 15 complete years at San Antonio Arroyo Prieto (Cf, 1981 to 2003. Blue stripes are years cooler than the station's own mean of 9.6 C (49.3 F); red stripes are warmer. The coolest year was 1984, at 8.3 C (46.9 F), and the warmest was 1995, at 11.0 C (51.9 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at San Antonio Arroyo Prieto (Cf as warming stripes, 1981 to 2003
YearAnnual mean temperatureDifference from the station mean
19818.3 C-1.30 C
19829.2 C-0.39 C
19839.3 C-0.35 C
19848.3 C-1.33 C
19858.5 C-1.13 C
19869.8 C+0.21 C
19889.6 C+0.00 C
19899.4 C-0.18 C
199110.5 C+0.93 C
19929.8 C+0.23 C
199410.9 C+1.33 C
199511.0 C+1.44 C
19999.5 C-0.10 C
20009.8 C+0.23 C
200310.0 C+0.39 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

1952 to 2009
Yearly extremes at San Antonio Arroyo Prieto (Cf: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)29.4 C (84.9 F)196322.8 C (73.0 F)31
Coldest night (TNn)-6.1 C (21.0 F)1986-1.7 C (28.9 F)30
Wettest day (Rx1day)169.2 mm (6.7 in)200946.4 mm (1.8 in)56
Wettest five days (Rx5day)239.6 mm (9.4 in)200992.9 mm (3.7 in)56
Longest dry spell (CDD)81 days199641 days56

Hottest day (TXx)

Hottest day (TXx) at San Antonio Arroyo Prieto (Cf by year The hottest day of the year at San Antonio Arroyo Prieto (Cf, 1952 to 2009. The record is 29.4 C (84.9 F) in 1963, marked on the chart; the median year is 22.8 C (73.0 F). 2022.52527.53019601970198019902000Record: 29.4 C (84.9 F) in 1963
The hottest day of the year at San Antonio Arroyo Prieto (Cf, 1952 to 2009. The record is 29.4 C (84.9 F) in 1963, marked on the chart; the median year is 22.8 C (73.0 F).
Hottest day (TXx) at San Antonio Arroyo Prieto (Cf by year
YearHottest day (TXx)
1952n/a
1954n/a
1955n/a
1956n/a
1957n/a
1958n/a
1959n/a
1960n/a
196125.6 C (78.1 F)
1962n/a
196329.4 C (84.9 F)
1964n/a
1965n/a
1966n/a
1967n/a
1968n/a
1969n/a
1970n/a
1971n/a
1972n/a
1973n/a
1974n/a
1975n/a
1976n/a
1977n/a
1978n/a
1979n/a
198022.8 C (73.0 F)
198121.7 C (71.1 F)
198223.3 C (73.9 F)
198326.7 C (80.1 F)
198421.7 C (71.1 F)
198521.7 C (71.1 F)
198623.9 C (75.0 F)
198720.6 C (69.1 F)
198822.8 C (73.0 F)
198921.7 C (71.1 F)
199020.0 C (68.0 F)
199123.3 C (73.9 F)
199220.6 C (69.1 F)
199322.8 C (73.0 F)
199421.7 C (71.1 F)
199522.8 C (73.0 F)
199621.7 C (71.1 F)
199720.6 C (69.1 F)
199826.7 C (80.1 F)
199923.9 C (75.0 F)
200021.7 C (71.1 F)
200222.8 C (73.0 F)
200324.4 C (75.9 F)
200421.7 C (71.1 F)
200522.8 C (73.0 F)
200622.2 C (72.0 F)
200721.7 C (71.1 F)
200822.8 C (73.0 F)
200923.9 C (75.0 F)

Coldest night (TNn)

Coldest night (TNn) at San Antonio Arroyo Prieto (Cf by year The coldest night of the year at San Antonio Arroyo Prieto (Cf, 1952 to 2009. The record is -6.1 C (21.0 F) in 1986, marked on the chart; the median year is -1.7 C (28.9 F). -10-5051019601970198019902000Record: -6.1 C (21.0 F) in 1986
The coldest night of the year at San Antonio Arroyo Prieto (Cf, 1952 to 2009. The record is -6.1 C (21.0 F) in 1986, marked on the chart; the median year is -1.7 C (28.9 F).
Coldest night (TNn) at San Antonio Arroyo Prieto (Cf by year
YearColdest night (TNn)
1952n/a
1954n/a
1955n/a
1956n/a
1957n/a
1958n/a
1959n/a
1960n/a
1961n/a
1962n/a
19637.2 C (45.0 F)
1964n/a
1965n/a
1966n/a
1967n/a
1968n/a
1969n/a
1970n/a
1971n/a
1972n/a
1973n/a
1974n/a
1975n/a
1976n/a
1977n/a
1978n/a
1979n/a
19800.0 C (32.0 F)
19810.0 C (32.0 F)
19820.0 C (32.0 F)
1983-1.1 C (30.0 F)
1984-4.4 C (24.1 F)
19850.0 C (32.0 F)
1986-6.1 C (21.0 F)
1987-1.1 C (30.0 F)
1988-3.3 C (26.1 F)
1989-2.2 C (28.0 F)
1990-3.3 C (26.1 F)
1991-1.1 C (30.0 F)
19920.0 C (32.0 F)
19930.0 C (32.0 F)
19940.6 C (33.1 F)
19950.6 C (33.1 F)
1996-1.7 C (28.9 F)
1997-5.0 C (23.0 F)
1998-5.0 C (23.0 F)
1999-5.0 C (23.0 F)
2000-5.0 C (23.0 F)
2002-1.1 C (30.0 F)
2003-2.2 C (28.0 F)
2004-1.1 C (30.0 F)
2005-2.8 C (27.0 F)
2006-1.7 C (28.9 F)
2007-2.2 C (28.0 F)
2008-3.9 C (25.0 F)
2009-2.2 C (28.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at San Antonio Arroyo Prieto (Cf by year The wettest day of the year at San Antonio Arroyo Prieto (Cf, 1952 to 2009. The record is 169.2 mm (6.7 in) in 2009, marked on the chart; the median year is 46.4 mm (1.8 in). 05010015020019601970198019902000Record: 169.2 mm (6.7 in) in 2009
The wettest day of the year at San Antonio Arroyo Prieto (Cf, 1952 to 2009. The record is 169.2 mm (6.7 in) in 2009, marked on the chart; the median year is 46.4 mm (1.8 in).
Wettest day (Rx1day) at San Antonio Arroyo Prieto (Cf by year
YearWettest day (Rx1day)
19520.0 mm (0.00 in)
19540.3 mm (0.01 in)
195573.9 mm (2.9 in)
195647.0 mm (1.9 in)
195746.2 mm (1.8 in)
195848.8 mm (1.9 in)
195931.5 mm (1.2 in)
196039.9 mm (1.6 in)
196131.8 mm (1.3 in)
196250.3 mm (2.0 in)
196339.9 mm (1.6 in)
196442.9 mm (1.7 in)
196552.1 mm (2.1 in)
196652.1 mm (2.1 in)
196763.8 mm (2.5 in)
196841.9 mm (1.6 in)
196938.9 mm (1.5 in)
197046.5 mm (1.8 in)
197151.6 mm (2.0 in)
197234.0 mm (1.3 in)
197347.2 mm (1.9 in)
197495.8 mm (3.8 in)
197541.9 mm (1.6 in)
197657.9 mm (2.3 in)
197736.1 mm (1.4 in)
197863.0 mm (2.5 in)
197962.5 mm (2.5 in)
198036.3 mm (1.4 in)
198155.4 mm (2.2 in)
198231.5 mm (1.2 in)
198337.1 mm (1.5 in)
198434.3 mm (1.4 in)
198558.4 mm (2.3 in)
198633.3 mm (1.3 in)
198732.8 mm (1.3 in)
198842.4 mm (1.7 in)
198930.2 mm (1.2 in)
199028.2 mm (1.1 in)
199146.5 mm (1.8 in)
199243.9 mm (1.7 in)
199335.3 mm (1.4 in)
199448.0 mm (1.9 in)
199553.1 mm (2.1 in)
199639.4 mm (1.6 in)
199765.3 mm (2.6 in)
199862.5 mm (2.5 in)
199967.3 mm (2.6 in)
200047.2 mm (1.9 in)
200249.5 mm (1.9 in)
200345.2 mm (1.8 in)
200422.4 mm (0.9 in)
200532.8 mm (1.3 in)
200656.9 mm (2.2 in)
200782.3 mm (3.2 in)
200863.0 mm (2.5 in)
2009169.2 mm (6.7 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at San Antonio Arroyo Prieto (Cf by year The wettest five days of the year at San Antonio Arroyo Prieto (Cf, 1952 to 2009. The record is 239.6 mm (9.4 in) in 2009, marked on the chart; the median year is 92.9 mm (3.7 in). 010020030019601970198019902000Record: 239.6 mm (9.4 in) in 2009
The wettest five days of the year at San Antonio Arroyo Prieto (Cf, 1952 to 2009. The record is 239.6 mm (9.4 in) in 2009, marked on the chart; the median year is 92.9 mm (3.7 in).
Wettest five days (Rx5day) at San Antonio Arroyo Prieto (Cf by year
YearWettest five days (Rx5day)
19520.0 mm (0.00 in)
19540.3 mm (0.01 in)
1955161.4 mm (6.4 in)
1956100.4 mm (4.0 in)
195768.9 mm (2.7 in)
1958120.4 mm (4.7 in)
195989.2 mm (3.5 in)
196073.1 mm (2.9 in)
196189.0 mm (3.5 in)
1962163.5 mm (6.4 in)
196391.8 mm (3.6 in)
1964123.5 mm (4.9 in)
196593.7 mm (3.7 in)
196692.8 mm (3.7 in)
1967141.9 mm (5.6 in)
1968120.7 mm (4.8 in)
196994.8 mm (3.7 in)
1970116.4 mm (4.6 in)
197186.7 mm (3.4 in)
197286.5 mm (3.4 in)
197397.2 mm (3.8 in)
1974156.3 mm (6.2 in)
1975101.4 mm (4.0 in)
1976132.3 mm (5.2 in)
197791.7 mm (3.6 in)
1978171.5 mm (6.8 in)
1979105.2 mm (4.1 in)
1980119.1 mm (4.7 in)
1981146.7 mm (5.8 in)
198257.7 mm (2.3 in)
198377.2 mm (3.0 in)
1984118.2 mm (4.7 in)
198581.8 mm (3.2 in)
198689.7 mm (3.5 in)
198757.8 mm (2.3 in)
1988116.3 mm (4.6 in)
198978.3 mm (3.1 in)
199058.7 mm (2.3 in)
1991105.2 mm (4.1 in)
199292.5 mm (3.6 in)
199364.6 mm (2.5 in)
199487.8 mm (3.5 in)
199577.0 mm (3.0 in)
199689.5 mm (3.5 in)
1997127.3 mm (5.0 in)
1998136.5 mm (5.4 in)
1999152.9 mm (6.0 in)
200073.2 mm (2.9 in)
200258.1 mm (2.3 in)
200393.0 mm (3.7 in)
200453.1 mm (2.1 in)
200583.5 mm (3.3 in)
200675.5 mm (3.0 in)
2007111.0 mm (4.4 in)
2008130.6 mm (5.1 in)
2009239.6 mm (9.4 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at San Antonio Arroyo Prieto (Cf by year The longest dry spell of the year at San Antonio Arroyo Prieto (Cf, 1952 to 2009. The record is 81 days in 1996, marked on the chart; the median year is 41 days. 02040608010019601970198019902000Record: 81 days in 1996
The longest dry spell of the year at San Antonio Arroyo Prieto (Cf, 1952 to 2009. The record is 81 days in 1996, marked on the chart; the median year is 41 days.
Longest dry spell (CDD) at San Antonio Arroyo Prieto (Cf by year
YearLongest dry spell (CDD)
195231 days
195416 days
195554 days
195630 days
195729 days
195830 days
195951 days
196044 days
196150 days
196248 days
196345 days
196461 days
196532 days
196663 days
196733 days
196844 days
196934 days
197057 days
197150 days
197255 days
197356 days
197429 days
197539 days
197641 days
197762 days
197843 days
197937 days
198031 days
198123 days
198238 days
198342 days
198423 days
198533 days
198624 days
198724 days
198840 days
198941 days
199022 days
199152 days
199228 days
199347 days
199439 days
199531 days
199681 days
199725 days
199865 days
199941 days
200050 days
200245 days
200370 days
200419 days
200531 days
200623 days
200727 days
200847 days
200948 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

46 years, 1955 to 2008

A day with at least 45.6 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 95.7 mm (3.8 in) of rain is expected about once in 100 years.

Rainfall return levels at San Antonio Arroyo Prieto (Cf: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years45.6 mm (1.8 in)
5 years58.2 mm (2.3 in)
10 years66.8 mm (2.6 in)
25 years78.2 mm (3.1 in)
50 years86.9 mm (3.4 in)Longer than the 46 years of record
100 years95.7 mm (3.8 in)Longer than the 46 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, 46 years of values from 1955 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: 95.8 mm (3.8 in) in 1974; 82.3 mm (3.2 in) in 2007; 73.9 mm (2.9 in) in 1955.

Download the Data

  • Data for San Antonio Arroyo Prieto (Cf standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for San Antonio Arroyo Prieto (Cf 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).