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Morelos 77 Weather Records (MXN00009026)

Record envelope, standing records and threshold days for Morelos 77 (MXN00009026), Mexico, with 42 years of record.

Key Facts for Morelos 77

  • Morelos 77 (MXN00009026) is a weather station in Mexico at 19.37 latitude and -99.08 longitude, 2,240 m (7,349 ft) above sea level.
  • The station reports from 1955 to 1996, 42 years of record.
  • 1,464 records set at Morelos 77 still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Morelos 77 set a daily record precipitation of 6.9 mm (0.27 in) on 31 December 1996.

About the Station

  • Location: Mexico, 19.37 latitude, -99.08 longitude.
  • Elevation: 2,240 m (7,349 ft).
  • Period of record: 1955 to 1996, 42 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 Morelos 77, with 2026 drawn through them The band shows the record high and record low for each calendar day at Morelos 77. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -10010203040 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Morelos 77. 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 Morelos 77, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan30.6 C (87.1 F)-7.2 C (19.0 F)n/an/a
Feb30.6 C (87.1 F)-5.0 C (23.0 F)n/an/a
Mar34.4 C (93.9 F)-2.8 C (27.0 F)n/an/a
Apr35.0 C (95.0 F)0.6 C (33.1 F)n/an/a
May34.4 C (93.9 F)3.9 C (39.0 F)n/an/a
Jun35.6 C (96.1 F)2.2 C (36.0 F)n/an/a
Jul32.8 C (91.0 F)6.7 C (44.1 F)n/an/a
Aug31.7 C (89.1 F)3.9 C (39.0 F)n/an/a
Sep30.0 C (86.0 F)3.9 C (39.0 F)n/an/a
Oct30.0 C (86.0 F)0.6 C (33.1 F)n/an/a
Nov29.4 C (84.9 F)-3.3 C (26.1 F)n/an/a
Dec27.8 C (82.0 F)-5.6 C (21.9 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Morelos 77 by the year they were set 1,464 records at Morelos 77 still stand. 1979 holds the most, with 132. 0501001501955: 381956: 491957: 451958: 501959: 241960: 281961: 331962: 181963: 251964: 221965: 291966: 581967: 261968: 241969: 131970: 231971: 181972: 101973: 291974: 161975: 151976: 311977: 261978: 121979: 1321980: 961981: 691982: 441983: 471984: 501985: 271986: 131987: 371988: 511989: 341990: 441991: 481992: 211993: 241994: 11995: 491996: 15195519601965197019751980198519901995
1,464 records at Morelos 77 still stand. 1979 holds the most, with 132.
Standing records at Morelos 77 by the year they were set
Year setStanding records
195538
195649
195745
195850
195924
196028
196133
196218
196325
196422
196529
196658
196726
196824
196913
197023
197118
197210
197329
197416
197515
197631
197726
197812
1979132
198096
198169
198244
198347
198450
198527
198613
198737
198851
198934
199044
199148
199221
199324
19941
199549
199615

All-Time Record Progression

1 new records
When Morelos 77 set new all-time records 1 all-time records were set at Morelos 77 between 19 May 1995 and 19 May 1995. Each dot is a new record. Record high minimum temperature19 May 1995: Record high minimum temperature 16.7 C (62.1 F)1995
1 all-time records were set at Morelos 77 between 19 May 1995 and 19 May 1995. Each dot is a new record.
When Morelos 77 set new all-time records
DateKindDetail
1995-05-19Record high minimum temperatureRecord high minimum temperature 16.7 C (62.1 F)

Wettest Day of Each Month

Sep: 72.1 mm (2.8 in)
Record daily precipitation for each month at Morelos 77 The wettest day on record for each calendar month at Morelos 77. The most was 72.1 mm (2.8 in) on 11 September 1979. 020406080 Jan: 51.3 mm (2.0 in), 10 January 1967 Jan Feb: 21.1 mm (0.8 in), 7 February 1993 Feb Mar: 40.4 mm (1.6 in), 16 March 1978 Mar Apr: 30.5 mm (1.2 in), 13 April 1962 Apr May: 64.8 mm (2.6 in), 31 May 1972 May Jun: 47.8 mm (1.9 in), 30 June 1995 Jun Jul: 41.9 mm (1.6 in), 11 July 1969 Jul Aug: 64.8 mm (2.6 in), 22 August 1962 Aug Sep: 72.1 mm (2.8 in), 11 September 1979 Sep Oct: 53.8 mm (2.1 in), 17 October 1975 Oct Nov: 33.3 mm (1.3 in), 8 November 1994 Nov Dec: 45.2 mm (1.8 in), 7 December 1968 Dec
The wettest day on record for each calendar month at Morelos 77. The most was 72.1 mm (2.8 in) on 11 September 1979.
Record daily precipitation for each month at Morelos 77
MonthRecord daily precipitation (mm)Date
Jan51.3 mm (2.0 in)10 January 1967
Feb21.1 mm (0.8 in)7 February 1993
Mar40.4 mm (1.6 in)16 March 1978
Apr30.5 mm (1.2 in)13 April 1962
May64.8 mm (2.6 in)31 May 1972
Jun47.8 mm (1.9 in)30 June 1995
Jul41.9 mm (1.6 in)11 July 1969
Aug64.8 mm (2.6 in)22 August 1962
Sep72.1 mm (2.8 in)11 September 1979
Oct53.8 mm (2.1 in)17 October 1975
Nov33.3 mm (1.3 in)8 November 1994
Dec45.2 mm (1.8 in)7 December 1968

Period of Record Coverage

1955 to 1996
Days with data per year at Morelos 77 42 years of record at Morelos 77, 1955 to 1996. 6 years have data for under 90 percent of days and are left out of rankings: 1955, 1969, 1986, 1987, 1994, 1995. 1955: 183 of 365 days1956: 366 of 366 days1957: 364 of 365 days1958: 363 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: 364 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 302 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 337 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 335 of 365 days1979: 331 of 365 days1980: 366 of 366 days1981: 365 of 365 days1982: 335 of 365 days1983: 365 of 365 days1984: 366 of 366 days1985: 365 of 365 days1986: 182 of 365 days1987: 184 of 365 days1988: 366 of 366 days1989: 363 of 365 days1990: 344 of 365 days1991: 364 of 365 days1992: 348 of 366 days1993: 337 of 365 days1994: 91 of 365 days1995: 318 of 365 days1996: 333 of 366 days1960197019801990
42 years of record at Morelos 77, 1955 to 1996. 6 years have data for under 90 percent of days and are left out of rankings: 1955, 1969, 1986, 1987, 1994, 1995.
Days with data per year at Morelos 77
YearDays with dataShare of yearComplete
195518350%No
1956366100%Yes
1957364100%Yes
195836399%Yes
1959365100%Yes
1960366100%Yes
1961365100%Yes
1962365100%Yes
1963365100%Yes
1964366100%Yes
1965364100%Yes
1966365100%Yes
1967365100%Yes
1968366100%Yes
196930283%No
1970365100%Yes
1971365100%Yes
1972366100%Yes
1973365100%Yes
1974365100%Yes
197533792%Yes
1976366100%Yes
1977365100%Yes
197833592%Yes
197933191%Yes
1980366100%Yes
1981365100%Yes
198233592%Yes
1983365100%Yes
1984366100%Yes
1985365100%Yes
198618250%No
198718450%No
1988366100%Yes
198936399%Yes
199034494%Yes
1991364100%Yes
199234895%Yes
199333792%Yes
19949125%No
199531887%No
199633391%Yes

Latest Records

20
Latest records at Morelos 77
DateStationRecordValueBeat old record byOld record stoodSignificance
31 December 1996Morelos 77, MXdaily rain6.9 mm (0.27 in)2.8 mm (0.11 in)28 years15 of 100 (Routine)
20 December 1996Morelos 77, MXdaily rain16.0 mm (0.6 in)13.7 mm (0.5 in)38 years20 of 100 (Routine)
19 December 1996Morelos 77, MXdaily low max12.8 C (55.0 F)4.4 C (7.9 F)21 years27 of 100 (Routine)
24 November 1996Morelos 77, MXdaily low max18.3 C (64.9 F)1.1 C (2.0 F)32 years17 of 100 (Routine)
10 November 1996Morelos 77, MXdaily low min1.1 C (34.0 F)1.7 C (3.1 F)34 years20 of 100 (Routine)
30 October 1996Morelos 77, MXdaily high max (Tie)27.8 C (82.0 F)tie14 years2 of 100 (Routine)
22 October 1996Morelos 77, MXdaily high max (Tie)26.7 C (80.1 F)tie39 years3 of 100 (Routine)
9 October 1996Morelos 77, MXdaily low max (Tie)18.3 C (64.9 F)tie20 years2 of 100 (Routine)
5 October 1996Morelos 77, MXdaily high min13.9 C (57.0 F)0.6 C (1.1 F)19 years11 of 100 (Routine)
2 October 1996Morelos 77, MXdaily high min (Tie)13.9 C (57.0 F)tie19 years2 of 100 (Routine)
26 September 1996Morelos 77, MXdaily high max (Tie)26.7 C (80.1 F)tie23 years2 of 100 (Routine)
11 September 1996Morelos 77, MXdaily high max (Tie)27.2 C (81.0 F)tie17 years2 of 100 (Routine)
24 August 1996Morelos 77, MXdaily low max21.1 C (70.0 F)0.6 C (1.1 F)30 years16 of 100 (Routine)
23 August 1996Morelos 77, MXdaily low max17.2 C (63.0 F)3.4 C (6.1 F)10 years24 of 100 (Routine)
17 August 1996Morelos 77, MXdaily low max (Tie)20.6 C (69.1 F)tie1 year1 of 100 (Routine)
10 July 1996Morelos 77, MXdaily high max28.3 C (82.9 F)0.5 C (0.9 F)16 years10 of 100 (Routine)
29 June 1996Morelos 77, MXdaily low max17.8 C (64.0 F)2.2 C (4.0 F)31 years20 of 100 (Routine)
31 May 1996Morelos 77, MXdaily high min (Tie)14.4 C (57.9 F)tie1 year1 of 100 (Routine)
30 May 1996Morelos 77, MXdaily high min (Tie)13.3 C (55.9 F)tie21 years2 of 100 (Routine)
29 May 1996Morelos 77, MXdaily high min (Tie)14.4 C (57.9 F)tie6 years1 of 100 (Routine)

Climate Trend

26 complete years, 1956 to 1991
Annual mean temperature at Morelos 77 as warming stripes, 1956 to 1991 One stripe for each of 26 complete years at Morelos 77, 1956 to 1991. Blue stripes are years cooler than the station's own mean of 16.4 C (61.5 F); red stripes are warmer. The coolest year was 1956, at 15.5 C (59.9 F), and the warmest was 1991, at 17.5 C (63.4 F). The strongest colour marks a difference of 1.1 C (2.0 F). 1956: 15.5 C, -0.9 C from the station mean1957: 16.3 C, -0.1 C from the station mean1958: 16.4 C, +0.1 C from the station mean1959: 16.1 C, -0.3 C from the station mean1960: 16.4 C, 0.0 C from the station mean1961: 15.9 C, -0.5 C from the station mean1962: 16.0 C, -0.4 C from the station mean1963: 16.0 C, -0.4 C from the station mean1964: 16.4 C, 0.0 C from the station mean1965: 16.0 C, -0.4 C from the station mean1966: 15.8 C, -0.6 C from the station mean1967: 16.0 C, -0.4 C from the station mean1968: 16.0 C, -0.4 C from the station mean1970: 16.2 C, -0.2 C from the station mean1971: 16.4 C, 0.0 C from the station mean1972: 16.5 C, +0.1 C from the station mean1973: 16.8 C, +0.5 C from the station mean1974: 16.4 C, 0.0 C from the station mean1976: 16.5 C, +0.1 C from the station mean1977: 17.0 C, +0.6 C from the station mean1981: 16.5 C, +0.1 C from the station mean1983: 17.3 C, +0.9 C from the station mean1984: 16.7 C, +0.3 C from the station mean1985: 16.2 C, -0.2 C from the station mean1988: 17.3 C, +0.9 C from the station mean1991: 17.5 C, +1.1 C from the station mean19561960196519701975198019851990
One stripe for each of 26 complete years at Morelos 77, 1956 to 1991. Blue stripes are years cooler than the station's own mean of 16.4 C (61.5 F); red stripes are warmer. The coolest year was 1956, at 15.5 C (59.9 F), and the warmest was 1991, at 17.5 C (63.4 F). The strongest colour marks a difference of 1.1 C (2.0 F).
Annual mean temperature at Morelos 77 as warming stripes, 1956 to 1991
YearAnnual mean temperatureDifference from the station mean
195615.5 C-0.89 C
195716.3 C-0.13 C
195816.4 C+0.06 C
195916.1 C-0.31 C
196016.4 C+0.05 C
196115.9 C-0.51 C
196216.0 C-0.36 C
196316.0 C-0.39 C
196416.4 C+0.04 C
196516.0 C-0.42 C
196615.8 C-0.57 C
196716.0 C-0.41 C
196816.0 C-0.41 C
197016.2 C-0.18 C
197116.4 C+0.01 C
197216.5 C+0.15 C
197316.8 C+0.46 C
197416.4 C+0.05 C
197616.5 C+0.10 C
197717.0 C+0.58 C
198116.5 C+0.14 C
198317.3 C+0.94 C
198416.7 C+0.32 C
198516.2 C-0.23 C
198817.3 C+0.94 C
199117.5 C+1.07 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

1955 to 1996
Yearly extremes at Morelos 77: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)35.6 C (96.1 F)198231.7 C (89.1 F)42
Coldest night (TNn)-7.2 C (19.0 F)1956-1.1 C (30.0 F)42
Wettest day (Rx1day)72.1 mm (2.8 in)197940.9 mm (1.6 in)42
Wettest five days (Rx5day)134.3 mm (5.3 in)197975.5 mm (3.0 in)42
Longest dry spell (CDD)110 days195660 days42

Hottest day (TXx)

Hottest day (TXx) at Morelos 77 by year The hottest day of the year at Morelos 77, 1955 to 1996. The record is 35.6 C (96.1 F) in 1982, marked on the chart; the median year is 31.7 C (89.1 F). 2628303234361960197019801990Record: 35.6 C (96.1 F) in 1982
The hottest day of the year at Morelos 77, 1955 to 1996. The record is 35.6 C (96.1 F) in 1982, marked on the chart; the median year is 31.7 C (89.1 F).
Hottest day (TXx) at Morelos 77 by year
YearHottest day (TXx)
195532.8 C (91.0 F)
195631.7 C (89.1 F)
195731.7 C (89.1 F)
195831.1 C (88.0 F)
195930.6 C (87.1 F)
196031.7 C (89.1 F)
196131.7 C (89.1 F)
196231.7 C (89.1 F)
196331.1 C (88.0 F)
196431.7 C (89.1 F)
196530.0 C (86.0 F)
196631.7 C (89.1 F)
196732.2 C (90.0 F)
196829.4 C (84.9 F)
196931.1 C (88.0 F)
197032.2 C (90.0 F)
197131.1 C (88.0 F)
197230.0 C (86.0 F)
197332.2 C (90.0 F)
197431.1 C (88.0 F)
197530.6 C (87.1 F)
197628.9 C (84.0 F)
197730.6 C (87.1 F)
197830.6 C (87.1 F)
197931.7 C (89.1 F)
198033.3 C (91.9 F)
198135.0 C (95.0 F)
198235.6 C (96.1 F)
198332.8 C (91.0 F)
198433.9 C (93.0 F)
198530.6 C (87.1 F)
198627.8 C (82.0 F)
198728.9 C (84.0 F)
198831.1 C (88.0 F)
198934.4 C (93.9 F)
199033.3 C (91.9 F)
199134.4 C (93.9 F)
199231.1 C (88.0 F)
199334.4 C (93.9 F)
199431.1 C (88.0 F)
199533.9 C (93.0 F)
199632.2 C (90.0 F)

Coldest night (TNn)

Coldest night (TNn) at Morelos 77 by year The coldest night of the year at Morelos 77, 1955 to 1996. The record is -7.2 C (19.0 F) in 1956, marked on the chart; the median year is -1.1 C (30.0 F). -10-505101960197019801990Record: -7.2 C (19.0 F) in 1956
The coldest night of the year at Morelos 77, 1955 to 1996. The record is -7.2 C (19.0 F) in 1956, marked on the chart; the median year is -1.1 C (30.0 F).
Coldest night (TNn) at Morelos 77 by year
YearColdest night (TNn)
1955-3.9 C (25.0 F)
1956-7.2 C (19.0 F)
1957-3.9 C (25.0 F)
1958-7.2 C (19.0 F)
1959-3.3 C (26.1 F)
1960-5.0 C (23.0 F)
1961-3.3 C (26.1 F)
1962-1.1 C (30.0 F)
1963-5.6 C (21.9 F)
19640.0 C (32.0 F)
1965-2.2 C (28.0 F)
1966-2.2 C (28.0 F)
1967-2.2 C (28.0 F)
1968-5.0 C (23.0 F)
19690.0 C (32.0 F)
1970-1.7 C (28.9 F)
1971-0.6 C (30.9 F)
19720.0 C (32.0 F)
1973-1.7 C (28.9 F)
1974-1.1 C (30.0 F)
1975-3.3 C (26.1 F)
1976-1.1 C (30.0 F)
19771.1 C (34.0 F)
19781.7 C (35.1 F)
1979-1.1 C (30.0 F)
19800.0 C (32.0 F)
19810.0 C (32.0 F)
19821.7 C (35.1 F)
1983-4.4 C (24.1 F)
19841.7 C (35.1 F)
19850.6 C (33.1 F)
19860.0 C (32.0 F)
1987-1.1 C (30.0 F)
1988-1.1 C (30.0 F)
1989-2.2 C (28.0 F)
19900.0 C (32.0 F)
19911.7 C (35.1 F)
19920.0 C (32.0 F)
19930.6 C (33.1 F)
19949.4 C (48.9 F)
19950.0 C (32.0 F)
19960.0 C (32.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Morelos 77 by year The wettest day of the year at Morelos 77, 1955 to 1996. The record is 72.1 mm (2.8 in) in 1979, marked on the chart; the median year is 40.9 mm (1.6 in). 0204060801960197019801990Record: 72.1 mm (2.8 in) in 1979
The wettest day of the year at Morelos 77, 1955 to 1996. The record is 72.1 mm (2.8 in) in 1979, marked on the chart; the median year is 40.9 mm (1.6 in).
Wettest day (Rx1day) at Morelos 77 by year
YearWettest day (Rx1day)
195550.0 mm (2.0 in)
195623.1 mm (0.9 in)
195763.0 mm (2.5 in)
195847.5 mm (1.9 in)
195939.9 mm (1.6 in)
196047.5 mm (1.9 in)
196130.5 mm (1.2 in)
196264.8 mm (2.6 in)
196356.6 mm (2.2 in)
196419.8 mm (0.8 in)
196520.8 mm (0.8 in)
196619.8 mm (0.8 in)
196751.3 mm (2.0 in)
196845.2 mm (1.8 in)
196941.9 mm (1.6 in)
197042.9 mm (1.7 in)
197142.9 mm (1.7 in)
197264.8 mm (2.6 in)
197320.8 mm (0.8 in)
197432.8 mm (1.3 in)
197553.8 mm (2.1 in)
197634.8 mm (1.4 in)
197743.4 mm (1.7 in)
197840.4 mm (1.6 in)
197972.1 mm (2.8 in)
198028.4 mm (1.1 in)
198136.6 mm (1.4 in)
198256.4 mm (2.2 in)
198336.8 mm (1.4 in)
198447.8 mm (1.9 in)
198541.4 mm (1.6 in)
198623.9 mm (0.9 in)
198735.8 mm (1.4 in)
198838.4 mm (1.5 in)
198937.1 mm (1.5 in)
199031.5 mm (1.2 in)
199145.0 mm (1.8 in)
199242.9 mm (1.7 in)
199338.4 mm (1.5 in)
199437.8 mm (1.5 in)
199547.8 mm (1.9 in)
199616.0 mm (0.6 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Morelos 77 by year The wettest five days of the year at Morelos 77, 1955 to 1996. The record is 134.3 mm (5.3 in) in 1979, marked on the chart; the median year is 75.5 mm (3.0 in). 2550751001251501960197019801990Record: 134.3 mm (5.3 in) in 1979
The wettest five days of the year at Morelos 77, 1955 to 1996. The record is 134.3 mm (5.3 in) in 1979, marked on the chart; the median year is 75.5 mm (3.0 in).
Wettest five days (Rx5day) at Morelos 77 by year
YearWettest five days (Rx5day)
195574.0 mm (2.9 in)
195667.4 mm (2.7 in)
195786.2 mm (3.4 in)
195869.7 mm (2.7 in)
195981.0 mm (3.2 in)
196070.4 mm (2.8 in)
196148.3 mm (1.9 in)
196282.1 mm (3.2 in)
196384.0 mm (3.3 in)
196469.6 mm (2.7 in)
196577.9 mm (3.1 in)
196646.7 mm (1.8 in)
196770.2 mm (2.8 in)
1968100.4 mm (4.0 in)
196977.0 mm (3.0 in)
197067.4 mm (2.7 in)
1971103.1 mm (4.1 in)
197289.4 mm (3.5 in)
197357.9 mm (2.3 in)
1974100.5 mm (4.0 in)
197595.5 mm (3.8 in)
197668.4 mm (2.7 in)
197749.2 mm (1.9 in)
197880.5 mm (3.2 in)
1979134.3 mm (5.3 in)
198060.5 mm (2.4 in)
198194.3 mm (3.7 in)
198273.8 mm (2.9 in)
198378.5 mm (3.1 in)
1984106.6 mm (4.2 in)
198568.1 mm (2.7 in)
198637.3 mm (1.5 in)
198768.6 mm (2.7 in)
198897.1 mm (3.8 in)
198963.3 mm (2.5 in)
199064.5 mm (2.5 in)
199174.5 mm (2.9 in)
199296.5 mm (3.8 in)
1993104.6 mm (4.1 in)
199476.4 mm (3.0 in)
199579.0 mm (3.1 in)
199636.3 mm (1.4 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Morelos 77 by year The longest dry spell of the year at Morelos 77, 1955 to 1996. The record is 110 days in 1956, marked on the chart; the median year is 60 days. 02550751001251960197019801990Record: 110 days in 1956
The longest dry spell of the year at Morelos 77, 1955 to 1996. The record is 110 days in 1956, marked on the chart; the median year is 60 days.
Longest dry spell (CDD) at Morelos 77 by year
YearLongest dry spell (CDD)
195535 days
1956110 days
195752 days
195853 days
195997 days
196071 days
196146 days
196294 days
196379 days
196464 days
196566 days
196658 days
196757 days
196858 days
196957 days
197083 days
197176 days
197237 days
197357 days
197462 days
197565 days
197673 days
1977101 days
197843 days
197940 days
198055 days
198131 days
198282 days
198372 days
198491 days
198543 days
198690 days
198749 days
198881 days
198981 days
199070 days
199184 days
199248 days
199335 days
199412 days
199542 days
199654 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

37 years, 1956 to 1996

A day with at least 40.8 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 73.5 mm (2.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Morelos 77: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years40.8 mm (1.6 in)
5 years53.0 mm (2.1 in)
10 years59.4 mm (2.3 in)
25 years66.1 mm (2.6 in)
50 years70.1 mm (2.8 in)Longer than the 37 years of record
100 years73.5 mm (2.9 in)Longer than the 37 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, 37 years of values from 1956 to 1996.

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: 72.1 mm (2.8 in) in 1979; 64.8 mm (2.6 in) in 1962; 64.8 mm (2.6 in) in 1972.

Download the Data

  • Data for Morelos 77 standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Morelos 77 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

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