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Sihuapan Weather Records (MXN00030302)

Record envelope, standing records and threshold days for Sihuapan (MXN00030302), Mexico, with 36 years of record.

Key Facts for Sihuapan

  • Sihuapan (MXN00030302) is a weather station in Mexico at 18.43 latitude and -95.17 longitude, 264 m (866 ft) above sea level.
  • The station reports from 1976 to 2011, 36 years of record.
  • 1,464 records set at Sihuapan still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Sihuapan set a daily record low minimum temperature of 10.0 C (50.0 F) on 1 December 2011.

About the Station

  • Location: Mexico, 18.43 latitude, -95.17 longitude.
  • Elevation: 264 m (866 ft).
  • Period of record: 1976 to 2011, 36 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 Sihuapan, with 2026 drawn through them The band shows the record high and record low for each calendar day at Sihuapan. 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 Sihuapan. 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 Sihuapan, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan35.0 C (95.0 F)5.6 C (42.1 F)n/an/a
Feb37.2 C (99.0 F)0.0 C (32.0 F)n/an/a
Mar40.0 C (104.0 F)7.2 C (45.0 F)n/an/a
Apr41.7 C (107.1 F)9.4 C (48.9 F)n/an/a
May42.2 C (108.0 F)12.8 C (55.0 F)n/an/a
Jun41.1 C (106.0 F)15.6 C (60.1 F)n/an/a
Jul38.3 C (100.9 F)15.0 C (59.0 F)n/an/a
Aug37.8 C (100.0 F)15.0 C (59.0 F)n/an/a
Sep39.4 C (102.9 F)15.0 C (59.0 F)n/an/a
Oct37.8 C (100.0 F)10.0 C (50.0 F)n/an/a
Nov36.1 C (97.0 F)8.9 C (48.0 F)n/an/a
Dec34.4 C (93.9 F)4.4 C (39.9 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Sihuapan by the year they were set 1,464 records at Sihuapan still stand. 2005 holds the most, with 73. 0204060801976: 251977: 621978: 621979: 611980: 441981: 261982: 281983: 321984: 631985: 251986: 191987: 331988: 191989: 421990: 221991: 211992: 331993: 261994: 231995: 211996: 431997: 391998: 361999: 432000: 492001: 432002: 672003: 292004: 692005: 732006: 662007: 692008: 472009: 252010: 242011: 55197619801984198819921996200020042008
1,464 records at Sihuapan still stand. 2005 holds the most, with 73.
Standing records at Sihuapan by the year they were set
Year setStanding records
197625
197762
197862
197961
198044
198126
198228
198332
198463
198525
198619
198733
198819
198942
199022
199121
199233
199326
199423
199521
199643
199739
199836
199943
200049
200143
200267
200329
200469
200573
200666
200769
200847
200925
201024
201155

All-Time Record Progression

1 new records
When Sihuapan set new all-time records 1 all-time records were set at Sihuapan between 14 May 2008 and 14 May 2008. Each dot is a new record. Record high maximum temperature14 May 2008: Record high maximum temperature 42.2 C (108.0 F)
1 all-time records were set at Sihuapan between 14 May 2008 and 14 May 2008. Each dot is a new record.
When Sihuapan set new all-time records
DateKindDetail
2008-05-14Record high maximum temperatureRecord high maximum temperature 42.2 C (108.0 F)

Wettest Day of Each Month

Sep: 319.8 mm (12.6 in)
Record daily precipitation for each month at Sihuapan The wettest day on record for each calendar month at Sihuapan. The most was 319.8 mm (12.6 in) on 23 September 1980. 0100200300400 Jan: 84.1 mm (3.3 in), 1 January 2008 Jan Feb: 63.0 mm (2.5 in), 25 February 1983 Feb Mar: 186.7 mm (7.4 in), 11 March 2000 Mar Apr: 111.8 mm (4.4 in), 11 April 1982 Apr May: 99.8 mm (3.9 in), 31 May 1986 May Jun: 248.2 mm (9.8 in), 16 June 2005 Jun Jul: 280.7 mm (11.1 in), 4 July 1993 Jul Aug: 237.2 mm (9.3 in), 5 August 2005 Aug Sep: 319.8 mm (12.6 in), 23 September 1980 Sep Oct: 193.5 mm (7.6 in), 4 October 1999 Oct Nov: 194.3 mm (7.6 in), 17 November 1993 Nov Dec: 147.8 mm (5.8 in), 31 December 1990 Dec
The wettest day on record for each calendar month at Sihuapan. The most was 319.8 mm (12.6 in) on 23 September 1980.
Record daily precipitation for each month at Sihuapan
MonthRecord daily precipitation (mm)Date
Jan84.1 mm (3.3 in)1 January 2008
Feb63.0 mm (2.5 in)25 February 1983
Mar186.7 mm (7.4 in)11 March 2000
Apr111.8 mm (4.4 in)11 April 1982
May99.8 mm (3.9 in)31 May 1986
Jun248.2 mm (9.8 in)16 June 2005
Jul280.7 mm (11.1 in)4 July 1993
Aug237.2 mm (9.3 in)5 August 2005
Sep319.8 mm (12.6 in)23 September 1980
Oct193.5 mm (7.6 in)4 October 1999
Nov194.3 mm (7.6 in)17 November 1993
Dec147.8 mm (5.8 in)31 December 1990

Period of Record Coverage

1976 to 2011
Days with data per year at Sihuapan 36 years of record at Sihuapan, 1976 to 2011. 5 years have data for under 90 percent of days and are left out of rankings: 1976, 1978, 1986, 1987, 1988. 1976: 279 of 366 days1977: 363 of 365 days1978: 298 of 365 days1979: 365 of 365 days1980: 363 of 366 days1981: 364 of 365 days1982: 365 of 365 days1983: 364 of 365 days1984: 366 of 366 days1985: 365 of 365 days1986: 151 of 365 days1987: 275 of 365 days1988: 244 of 366 days1989: 364 of 365 days1990: 365 of 365 days1991: 365 of 365 days1992: 366 of 366 days1993: 365 of 365 days1994: 364 of 365 days1995: 364 of 365 days1996: 365 of 366 days1997: 365 of 365 days1998: 365 of 365 days1999: 365 of 365 days2000: 366 of 366 days2001: 365 of 365 days2002: 365 of 365 days2003: 365 of 365 days2004: 366 of 366 days2005: 365 of 365 days2006: 365 of 365 days2007: 365 of 365 days2008: 366 of 366 days2009: 365 of 365 days2010: 365 of 365 days2011: 365 of 365 days1980198519901995200020052010
36 years of record at Sihuapan, 1976 to 2011. 5 years have data for under 90 percent of days and are left out of rankings: 1976, 1978, 1986, 1987, 1988.
Days with data per year at Sihuapan
YearDays with dataShare of yearComplete
197627976%No
197736399%Yes
197829882%No
1979365100%Yes
198036399%Yes
1981364100%Yes
1982365100%Yes
1983364100%Yes
1984366100%Yes
1985365100%Yes
198615141%No
198727575%No
198824467%No
1989364100%Yes
1990365100%Yes
1991365100%Yes
1992366100%Yes
1993365100%Yes
1994364100%Yes
1995364100%Yes
1996365100%Yes
1997365100%Yes
1998365100%Yes
1999365100%Yes
2000366100%Yes
2001365100%Yes
2002365100%Yes
2003365100%Yes
2004366100%Yes
2005365100%Yes
2006365100%Yes
2007365100%Yes
2008366100%Yes
2009365100%Yes
2010365100%Yes
2011365100%Yes

Latest Records

20
Latest records at Sihuapan
DateStationRecordValueBeat old record byOld record stoodSignificance
1 December 2011Sihuapan, MXdaily low min10.0 C (50.0 F)1.7 C (3.1 F)12 years12 of 100 (Routine)
30 November 2011Sihuapan, MXmonthly low min (Tie)8.9 C (48.0 F)tie16 years4 of 100 (Routine)
29 November 2011Sihuapan, MXdaily low min9.4 C (48.9 F)1.2 C (2.2 F)12 years11 of 100 (Routine)
29 October 2011Sihuapan, MXdaily rain66.3 mm (2.6 in)40.4 mm (1.6 in)28 years26 of 100 (Routine)
4 September 2011Sihuapan, MXdaily high max (Tie)35.0 C (95.0 F)tie8 years1 of 100 (Routine)
3 September 2011Sihuapan, MXdaily high max35.0 C (95.0 F)0.6 C (1.1 F)6 years7 of 100 (Routine)
1 September 2011Sihuapan, MXdaily rain61.5 mm (2.4 in)7.4 mm (0.29 in)30 years14 of 100 (Routine)
29 August 2011Sihuapan, MXdaily rain67.1 mm (2.6 in)13.0 mm (0.5 in)10 years11 of 100 (Routine)
15 August 2011Sihuapan, MXdaily rain56.1 mm (2.2 in)6.8 mm (0.27 in)20 years12 of 100 (Routine)
13 August 2011Sihuapan, MXdaily high min23.3 C (73.9 F)0.5 C (0.9 F)4 years7 of 100 (Routine)
12 August 2011Sihuapan, MXdaily high max (Tie)36.7 C (98.1 F)tie2 years0 of 100 (Routine)
11 August 2011Sihuapan, MXdaily high min22.2 C (72.0 F)0.5 C (0.9 F)34 years16 of 100 (Routine)
11 August 2011Sihuapan, MXmonthly high max (Tie)37.8 C (100.0 F)tie2 years3 of 100 (Routine)
10 August 2011Sihuapan, MXdaily high max37.2 C (99.0 F)1.6 C (2.9 F)4 years10 of 100 (Routine)
9 August 2011Sihuapan, MXdaily high max36.1 C (97.0 F)1.1 C (2.0 F)6 years9 of 100 (Routine)
1 August 2011Sihuapan, MXdaily rain56.9 mm (2.2 in)3.8 mm (0.15 in)25 years11 of 100 (Routine)
31 July 2011Sihuapan, MXdaily rain41.4 mm (1.6 in)5.6 mm (0.22 in)30 years14 of 100 (Routine)
24 July 2011Sihuapan, MXdaily high max35.0 C (95.0 F)0.6 C (1.1 F)2 years5 of 100 (Routine)
26 June 2011Sihuapan, MXdaily high min23.3 C (73.9 F)0.5 C (0.9 F)32 years14 of 100 (Routine)
26 June 2011Sihuapan, MXdaily high max (Tie)36.7 C (98.1 F)tie4 years1 of 100 (Routine)

Climate Trend

31 complete years, 1977 to 2011
Annual mean temperature at Sihuapan as warming stripes, 1977 to 2011 One stripe for each of 31 complete years at Sihuapan, 1977 to 2011. Blue stripes are years cooler than the station's own mean of 23.5 C (74.3 F); red stripes are warmer. The coolest year was 1984, at 21.8 C (71.2 F), and the warmest was 2007, at 25.9 C (78.6 F). The strongest colour marks a difference of 2.4 C (4.3 F). 1977: 23.2 C, -0.3 C from the station mean1979: 22.1 C, -1.4 C from the station mean1980: 22.4 C, -1.1 C from the station mean1981: 22.2 C, -1.3 C from the station mean1982: 22.3 C, -1.2 C from the station mean1983: 22.6 C, -0.9 C from the station mean1984: 21.8 C, -1.7 C from the station mean1985: 22.8 C, -0.7 C from the station mean1989: 22.1 C, -1.4 C from the station mean1990: 22.4 C, -1.1 C from the station mean1991: 22.9 C, -0.6 C from the station mean1992: 22.2 C, -1.3 C from the station mean1993: 22.9 C, -0.6 C from the station mean1994: 23.1 C, -0.4 C from the station mean1995: 22.8 C, -0.7 C from the station mean1996: 22.1 C, -1.4 C from the station mean1997: 22.4 C, -1.1 C from the station mean1998: 23.2 C, -0.3 C from the station mean1999: 22.1 C, -1.4 C from the station mean2000: 23.7 C, +0.2 C from the station mean2001: 24.9 C, +1.4 C from the station mean2002: 25.1 C, +1.6 C from the station mean2003: 25.1 C, +1.6 C from the station mean2004: 25.2 C, +1.7 C from the station mean2005: 25.8 C, +2.3 C from the station mean2006: 25.7 C, +2.2 C from the station mean2007: 25.9 C, +2.4 C from the station mean2008: 25.1 C, +1.6 C from the station mean2009: 25.2 C, +1.7 C from the station mean2010: 24.6 C, +1.1 C from the station mean2011: 24.9 C, +1.4 C from the station mean19771980198519901995200020052010
One stripe for each of 31 complete years at Sihuapan, 1977 to 2011. Blue stripes are years cooler than the station's own mean of 23.5 C (74.3 F); red stripes are warmer. The coolest year was 1984, at 21.8 C (71.2 F), and the warmest was 2007, at 25.9 C (78.6 F). The strongest colour marks a difference of 2.4 C (4.3 F).
Annual mean temperature at Sihuapan as warming stripes, 1977 to 2011
YearAnnual mean temperatureDifference from the station mean
197723.2 C-0.28 C
197922.1 C-1.44 C
198022.4 C-1.09 C
198122.2 C-1.33 C
198222.3 C-1.23 C
198322.6 C-0.89 C
198421.8 C-1.72 C
198522.8 C-0.74 C
198922.1 C-1.45 C
199022.4 C-1.09 C
199122.9 C-0.64 C
199222.2 C-1.35 C
199322.9 C-0.59 C
199423.1 C-0.36 C
199522.8 C-0.71 C
199622.1 C-1.42 C
199722.4 C-1.10 C
199823.2 C-0.28 C
199922.1 C-1.36 C
200023.7 C+0.21 C
200124.9 C+1.40 C
200225.1 C+1.58 C
200325.1 C+1.58 C
200425.2 C+1.71 C
200525.8 C+2.34 C
200625.7 C+2.16 C
200725.9 C+2.38 C
200825.1 C+1.61 C
200925.2 C+1.66 C
201024.6 C+1.07 C
201124.9 C+1.35 C

The annual mean temperature here has risen by 1.1 C (0.8 to 1.4) per decade over 1977 to 2011. In Fahrenheit: 1.9 F (1.4 to 2.5) 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 Sihuapan
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature1.1 C (0.8 to 1.4) per decade1.9 F (1.4 to 2.5) per decade1977 to 201131Rise
Mean daily maximum1.6 C (1.3 to 1.9) per decade2.8 F (2.3 to 3.4) per decade1977 to 201131Rise
Mean daily minimum0.6 C (0.2 to 0.9) per decade1.0 F (0.4 to 1.7) per decade1977 to 201131Rise

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

1976 to 2011
Yearly extremes at Sihuapan: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)42.2 C (108.0 F)200837.8 C (100.0 F)36
Coldest night (TNn)0.0 C (32.0 F)19769.7 C (49.5 F)36
Wettest day (Rx1day)319.8 mm (12.6 in)1980149.4 mm (5.9 in)36
Wettest five days (Rx5day)616.0 mm (24.3 in)1980251.9 mm (9.9 in)36
Longest dry spell (CDD)75 days200540 days36

Hottest day (TXx)

Hottest day (TXx) at Sihuapan by year The hottest day of the year at Sihuapan, 1976 to 2011. The record is 42.2 C (108.0 F) in 2008, marked on the chart; the median year is 37.8 C (100.0 F). 3032.53537.54042.51980199020002010Record: 42.2 C (108.0 F) in 2008
The hottest day of the year at Sihuapan, 1976 to 2011. The record is 42.2 C (108.0 F) in 2008, marked on the chart; the median year is 37.8 C (100.0 F).
Hottest day (TXx) at Sihuapan by year
YearHottest day (TXx)
197636.7 C (98.1 F)
197737.2 C (99.0 F)
197836.7 C (98.1 F)
197935.6 C (96.1 F)
198036.7 C (98.1 F)
198137.8 C (100.0 F)
198235.0 C (95.0 F)
198338.9 C (102.0 F)
198438.9 C (102.0 F)
198538.3 C (100.9 F)
198637.8 C (100.0 F)
198736.7 C (98.1 F)
198832.2 C (90.0 F)
198935.6 C (96.1 F)
199036.7 C (98.1 F)
199137.8 C (100.0 F)
199232.8 C (91.0 F)
199336.7 C (98.1 F)
199436.7 C (98.1 F)
199536.7 C (98.1 F)
199636.7 C (98.1 F)
199735.6 C (96.1 F)
199840.0 C (104.0 F)
199937.8 C (100.0 F)
200038.3 C (100.9 F)
200140.0 C (104.0 F)
200240.6 C (105.1 F)
200341.1 C (106.0 F)
200438.9 C (102.0 F)
200541.1 C (106.0 F)
200641.7 C (107.1 F)
200741.1 C (106.0 F)
200842.2 C (108.0 F)
200941.7 C (107.1 F)
201040.6 C (105.1 F)
201140.6 C (105.1 F)

Coldest night (TNn)

Coldest night (TNn) at Sihuapan by year The coldest night of the year at Sihuapan, 1976 to 2011. The record is 0.0 C (32.0 F) in 1976, marked on the chart; the median year is 9.7 C (49.5 F). 0510151980199020002010Record: 0.0 C (32.0 F) in 1976
The coldest night of the year at Sihuapan, 1976 to 2011. The record is 0.0 C (32.0 F) in 1976, marked on the chart; the median year is 9.7 C (49.5 F).
Coldest night (TNn) at Sihuapan by year
YearColdest night (TNn)
19760.0 C (32.0 F)
19778.9 C (48.0 F)
197810.6 C (51.1 F)
19798.9 C (48.0 F)
19808.9 C (48.0 F)
198110.0 C (50.0 F)
19828.9 C (48.0 F)
198310.0 C (50.0 F)
198410.0 C (50.0 F)
19859.4 C (48.9 F)
19867.8 C (46.0 F)
198710.6 C (51.1 F)
198810.0 C (50.0 F)
19895.0 C (41.0 F)
19908.9 C (48.0 F)
19918.9 C (48.0 F)
199210.0 C (50.0 F)
19938.9 C (48.0 F)
199410.0 C (50.0 F)
19958.9 C (48.0 F)
19965.6 C (42.1 F)
19974.4 C (39.9 F)
19986.7 C (44.1 F)
19997.2 C (45.0 F)
20006.1 C (43.0 F)
200111.1 C (52.0 F)
200210.6 C (51.1 F)
200312.2 C (54.0 F)
200412.2 C (54.0 F)
200512.2 C (54.0 F)
200610.0 C (50.0 F)
200712.2 C (54.0 F)
200812.8 C (55.0 F)
200910.0 C (50.0 F)
201010.0 C (50.0 F)
20118.9 C (48.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Sihuapan by year The wettest day of the year at Sihuapan, 1976 to 2011. The record is 319.8 mm (12.6 in) in 1980, marked on the chart; the median year is 149.4 mm (5.9 in). 01002003004001980199020002010Record: 319.8 mm (12.6 in) in 1980
The wettest day of the year at Sihuapan, 1976 to 2011. The record is 319.8 mm (12.6 in) in 1980, marked on the chart; the median year is 149.4 mm (5.9 in).
Wettest day (Rx1day) at Sihuapan by year
YearWettest day (Rx1day)
1976239.8 mm (9.4 in)
197795.8 mm (3.8 in)
1978150.9 mm (5.9 in)
1979125.0 mm (4.9 in)
1980319.8 mm (12.6 in)
198198.0 mm (3.9 in)
1982132.8 mm (5.2 in)
1983110.0 mm (4.3 in)
1984159.8 mm (6.3 in)
198559.9 mm (2.4 in)
198699.8 mm (3.9 in)
198785.1 mm (3.4 in)
198851.1 mm (2.0 in)
1989159.3 mm (6.3 in)
1990147.8 mm (5.8 in)
1991252.2 mm (9.9 in)
1992259.1 mm (10.2 in)
1993280.7 mm (11.1 in)
1994286.8 mm (11.3 in)
199589.4 mm (3.5 in)
1996197.4 mm (7.8 in)
1997155.4 mm (6.1 in)
199883.1 mm (3.3 in)
1999193.5 mm (7.6 in)
2000186.7 mm (7.4 in)
2001131.8 mm (5.2 in)
2002219.7 mm (8.6 in)
2003111.3 mm (4.4 in)
200450.8 mm (2.0 in)
2005248.2 mm (9.8 in)
2006167.4 mm (6.6 in)
2007129.0 mm (5.1 in)
2008130.0 mm (5.1 in)
2009187.7 mm (7.4 in)
2010206.2 mm (8.1 in)
201179.2 mm (3.1 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Sihuapan by year The wettest five days of the year at Sihuapan, 1976 to 2011. The record is 616.0 mm (24.3 in) in 1980, marked on the chart; the median year is 251.9 mm (9.9 in). 02004006008001980199020002010Record: 616.0 mm (24.3 in) in 1980
The wettest five days of the year at Sihuapan, 1976 to 2011. The record is 616.0 mm (24.3 in) in 1980, marked on the chart; the median year is 251.9 mm (9.9 in).
Wettest five days (Rx5day) at Sihuapan by year
YearWettest five days (Rx5day)
1976321.4 mm (12.7 in)
1977204.1 mm (8.0 in)
1978234.2 mm (9.2 in)
1979284.2 mm (11.2 in)
1980616.0 mm (24.3 in)
1981252.3 mm (9.9 in)
1982346.2 mm (13.6 in)
1983167.7 mm (6.6 in)
1984334.5 mm (13.2 in)
1985155.8 mm (6.1 in)
1986169.7 mm (6.7 in)
1987123.7 mm (4.9 in)
1988130.1 mm (5.1 in)
1989398.0 mm (15.7 in)
1990231.2 mm (9.1 in)
1991496.0 mm (19.5 in)
1992337.1 mm (13.3 in)
1993303.6 mm (12.0 in)
1994349.6 mm (13.8 in)
1995220.8 mm (8.7 in)
1996305.9 mm (12.0 in)
1997324.6 mm (12.8 in)
1998199.3 mm (7.8 in)
1999444.5 mm (17.5 in)
2000228.6 mm (9.0 in)
2001193.6 mm (7.6 in)
2002299.4 mm (11.8 in)
2003200.8 mm (7.9 in)
200483.1 mm (3.3 in)
2005513.4 mm (20.2 in)
2006251.5 mm (9.9 in)
2007187.5 mm (7.4 in)
2008292.1 mm (11.5 in)
2009208.1 mm (8.2 in)
2010333.8 mm (13.1 in)
2011182.4 mm (7.2 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Sihuapan by year The longest dry spell of the year at Sihuapan, 1976 to 2011. The record is 75 days in 2005, marked on the chart; the median year is 40 days. 0204060801980199020002010Record: 75 days in 2005
The longest dry spell of the year at Sihuapan, 1976 to 2011. The record is 75 days in 2005, marked on the chart; the median year is 40 days.
Longest dry spell (CDD) at Sihuapan by year
YearLongest dry spell (CDD)
197617 days
197744 days
197814 days
197923 days
198047 days
198140 days
198239 days
198353 days
198468 days
198540 days
198636 days
198753 days
198840 days
198926 days
199023 days
199164 days
199253 days
199353 days
199462 days
199555 days
199670 days
199725 days
199858 days
199928 days
200032 days
200128 days
200234 days
200369 days
200423 days
200575 days
200620 days
200750 days
200830 days
200924 days
201038 days
201154 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

30 years, 1977 to 2011

A day with at least 156.8 mm (6.2 in) of rain is expected about once in 2 years. A day with at least 379.6 mm (14.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Sihuapan: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years156.8 mm (6.2 in)
5 years220.9 mm (8.7 in)
10 years261.5 mm (10.3 in)
25 years310.7 mm (12.2 in)
50 years345.8 mm (13.6 in)Longer than the 30 years of record
100 years379.6 mm (14.9 in)Longer than the 30 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, 30 years of values from 1977 to 2011.

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: 319.8 mm (12.6 in) in 1980; 286.8 mm (11.3 in) in 1994; 280.7 mm (11.1 in) in 1993.

Download the Data

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