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San Lucas Ojitlan Weather Records (MXN00020081)

Record envelope, standing records and threshold days for San Lucas Ojitlan (MXN00020081), Mexico, with 50 years of record.

Key Facts for San Lucas Ojitlan

  • San Lucas Ojitlan (MXN00020081) is a weather station in Mexico at 18.05 latitude and -96.38 longitude, 139 m (456 ft) above sea level.
  • The station reports from 1951 to 2000, 50 years of record.
  • 1,464 records set at San Lucas Ojitlan still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • San Lucas Ojitlan tied a daily record low minimum temperature of 13.9 C (57.0 F) on 17 December 2000.

About the Station

  • Location: Mexico, 18.05 latitude, -96.38 longitude.
  • Elevation: 139 m (456 ft).
  • Period of record: 1951 to 2000, 50 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 Lucas Ojitlan, with 2026 drawn through them The band shows the record high and record low for each calendar day at San Lucas Ojitlan. 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 Lucas Ojitlan. 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 Lucas Ojitlan, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan35.6 C (96.1 F)10.0 C (50.0 F)n/an/a
Feb38.9 C (102.0 F)5.6 C (42.1 F)n/an/a
Mar41.7 C (107.1 F)11.7 C (53.1 F)n/an/a
Apr42.2 C (108.0 F)10.0 C (50.0 F)n/an/a
May41.1 C (106.0 F)15.6 C (60.1 F)n/an/a
Jun40.0 C (104.0 F)12.8 C (55.0 F)n/an/a
Jul36.7 C (98.1 F)15.6 C (60.1 F)n/an/a
Aug38.3 C (100.9 F)16.7 C (62.1 F)n/an/a
Sep38.3 C (100.9 F)13.9 C (57.0 F)n/an/a
Oct35.6 C (96.1 F)13.9 C (57.0 F)n/an/a
Nov35.0 C (95.0 F)10.0 C (50.0 F)n/an/a
Dec35.0 C (95.0 F)9.4 C (48.9 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at San Lucas Ojitlan by the year they were set 1,464 records at San Lucas Ojitlan still stand. 1991 holds the most, with 191. 0501001502001951: 341952: 421953: 181954: 201955: 311956: 201957: 271958: 231959: 191960: 181961: 151962: 261963: 191964: 351965: 261966: 241967: 241968: 161969: 391970: 151971: 301972: 161973: 371974: 1881975: 1041976: 201977: 231978: 231979: 541980: 481981: 241982: 161983: 321984: 451985: 11991: 1912000: 1211951195519591963196719711975197919832000
1,464 records at San Lucas Ojitlan still stand. 1991 holds the most, with 191.
Standing records at San Lucas Ojitlan by the year they were set
Year setStanding records
195134
195242
195318
195420
195531
195620
195727
195823
195919
196018
196115
196226
196319
196435
196526
196624
196724
196816
196939
197015
197130
197216
197337
1974188
1975104
197620
197723
197823
197954
198048
198124
198216
198332
198445
19851
1991191
2000121

All-Time Record Progression

1 new records
When San Lucas Ojitlan set new all-time records 1 all-time records were set at San Lucas Ojitlan between 1 February 2000 and 1 February 2000. Each dot is a new record. Record low minimum temperature1 February 2000: Record low minimum temperature 5.6 C (42.1 F)2000
1 all-time records were set at San Lucas Ojitlan between 1 February 2000 and 1 February 2000. Each dot is a new record.
When San Lucas Ojitlan set new all-time records
DateKindDetail
2000-02-01Record low minimum temperatureRecord low minimum temperature 5.6 C (42.1 F)

Wettest Day of Each Month

Jun: 327.2 mm (12.9 in)
Record daily precipitation for each month at San Lucas Ojitlan The wettest day on record for each calendar month at San Lucas Ojitlan. The most was 327.2 mm (12.9 in) on 20 June 1973. 0100200300400 Jan: 72.9 mm (2.9 in), 8 January 1991 Jan Feb: 75.2 mm (3.0 in), 6 February 1975 Feb Mar: 129.8 mm (5.1 in), 28 March 1952 Mar Apr: 79.8 mm (3.1 in), 22 April 1979 Apr May: 152.4 mm (6.0 in), 29 May 1973 May Jun: 327.2 mm (12.9 in), 20 June 1973 Jun Jul: 282.4 mm (11.1 in), 9 July 1956 Jul Aug: 226.3 mm (8.9 in), 2 August 1969 Aug Sep: 218.9 mm (8.6 in), 4 September 1973 Sep Oct: 179.8 mm (7.1 in), 7 October 1991 Oct Nov: 114.8 mm (4.5 in), 21 November 2000 Nov Dec: 117.9 mm (4.6 in), 13 December 1958 Dec
The wettest day on record for each calendar month at San Lucas Ojitlan. The most was 327.2 mm (12.9 in) on 20 June 1973.
Record daily precipitation for each month at San Lucas Ojitlan
MonthRecord daily precipitation (mm)Date
Jan72.9 mm (2.9 in)8 January 1991
Feb75.2 mm (3.0 in)6 February 1975
Mar129.8 mm (5.1 in)28 March 1952
Apr79.8 mm (3.1 in)22 April 1979
May152.4 mm (6.0 in)29 May 1973
Jun327.2 mm (12.9 in)20 June 1973
Jul282.4 mm (11.1 in)9 July 1956
Aug226.3 mm (8.9 in)2 August 1969
Sep218.9 mm (8.6 in)4 September 1973
Oct179.8 mm (7.1 in)7 October 1991
Nov114.8 mm (4.5 in)21 November 2000
Dec117.9 mm (4.6 in)13 December 1958

Period of Record Coverage

1951 to 2000
Days with data per year at San Lucas Ojitlan 37 years of record at San Lucas Ojitlan, 1951 to 2000. 2 years have data for under 90 percent of days and are left out of rankings: 1962, 1985. 1951: 331 of 365 days1952: 353 of 366 days1953: 362 of 365 days1954: 365 of 365 days1955: 361 of 365 days1956: 364 of 366 days1957: 364 of 365 days1958: 364 of 365 days1959: 360 of 365 days1960: 363 of 366 days1961: 331 of 365 days1962: 305 of 365 days1963: 359 of 365 days1964: 363 of 366 days1965: 362 of 365 days1966: 360 of 365 days1967: 362 of 365 days1968: 358 of 366 days1969: 355 of 365 days1970: 358 of 365 days1971: 362 of 365 days1972: 363 of 366 days1973: 356 of 365 days1974: 360 of 365 days1975: 364 of 365 days1976: 362 of 366 days1977: 364 of 365 days1978: 359 of 365 days1979: 365 of 365 days1980: 366 of 366 days1981: 361 of 365 days1982: 363 of 365 days1983: 364 of 365 days1984: 363 of 366 days1985: 28 of 365 days1991: 364 of 365 days2000: 358 of 366 days19551960196519701975198019852000
37 years of record at San Lucas Ojitlan, 1951 to 2000. 2 years have data for under 90 percent of days and are left out of rankings: 1962, 1985.
Days with data per year at San Lucas Ojitlan
YearDays with dataShare of yearComplete
195133191%Yes
195235396%Yes
195336299%Yes
1954365100%Yes
195536199%Yes
195636499%Yes
1957364100%Yes
1958364100%Yes
195936099%Yes
196036399%Yes
196133191%Yes
196230584%No
196335998%Yes
196436399%Yes
196536299%Yes
196636099%Yes
196736299%Yes
196835898%Yes
196935597%Yes
197035898%Yes
197136299%Yes
197236399%Yes
197335698%Yes
197436099%Yes
1975364100%Yes
197636299%Yes
1977364100%Yes
197835998%Yes
1979365100%Yes
1980366100%Yes
198136199%Yes
198236399%Yes
1983364100%Yes
198436399%Yes
1985288%No
1991364100%Yes
200035898%Yes

Latest Records

20
Latest records at San Lucas Ojitlan
DateStationRecordValueBeat old record byOld record stoodSignificance
17 December 2000San Lucas Ojitlan, MXdaily low min (Tie)13.9 C (57.0 F)tie45 years4 of 100 (Routine)
16 December 2000San Lucas Ojitlan, MXdaily low min11.7 C (53.1 F)1.6 C (2.9 F)47 years25 of 100 (Routine)
15 December 2000San Lucas Ojitlan, MXdaily low min11.7 C (53.1 F)3.3 C (5.9 F)47 years31 of 100 (Routine)
15 December 2000San Lucas Ojitlan, MXdaily low max17.8 C (64.0 F)1.1 C (2.0 F)40 years20 of 100 (Routine)
14 December 2000San Lucas Ojitlan, MXdaily low min11.7 C (53.1 F)2.2 C (4.0 F)48 years27 of 100 (Routine)
14 December 2000San Lucas Ojitlan, MXdaily low max17.8 C (64.0 F)1.1 C (2.0 F)42 years20 of 100 (Routine)
13 December 2000San Lucas Ojitlan, MXdaily low max16.7 C (62.1 F)1.6 C (2.9 F)34 years20 of 100 (Routine)
12 December 2000San Lucas Ojitlan, MXdaily low max15.6 C (60.1 F)2.2 C (4.0 F)34 years22 of 100 (Routine)
12 December 2000San Lucas Ojitlan, MXdaily low min11.7 C (53.1 F)1.1 C (2.0 F)43 years21 of 100 (Routine)
11 December 2000San Lucas Ojitlan, MXdaily low min11.7 C (53.1 F)1.1 C (2.0 F)43 years21 of 100 (Routine)
11 December 2000San Lucas Ojitlan, MXdaily low max (Tie)20.0 C (68.0 F)tie49 years4 of 100 (Routine)
10 December 2000San Lucas Ojitlan, MXdaily low min10.6 C (51.1 F)1.1 C (2.0 F)43 years21 of 100 (Routine)
10 December 2000San Lucas Ojitlan, MXdaily low max (Tie)20.0 C (68.0 F)tie44 years4 of 100 (Routine)
9 December 2000San Lucas Ojitlan, MXdaily low min10.6 C (51.1 F)3.3 C (5.9 F)24 years24 of 100 (Routine)
9 December 2000San Lucas Ojitlan, MXdaily low max18.9 C (66.0 F)1.7 C (3.1 F)24 years17 of 100 (Routine)
8 December 2000San Lucas Ojitlan, MXdaily low max15.6 C (60.1 F)5.0 C (9.0 F)36 years31 of 100 (Routine)
8 December 2000San Lucas Ojitlan, MXdaily low min10.0 C (50.0 F)3.9 C (7.0 F)9 years22 of 100 (Routine)
6 December 2000San Lucas Ojitlan, MXdaily low max (Tie)17.8 C (64.0 F)tie41 years4 of 100 (Routine)
4 December 2000San Lucas Ojitlan, MXdaily low max20.0 C (68.0 F)1.1 C (2.0 F)33 years17 of 100 (Routine)
4 December 2000San Lucas Ojitlan, MXdaily low min (Tie)13.9 C (57.0 F)tie9 years1 of 100 (Routine)

Climate Trend

31 complete years, 1952 to 1991
Annual mean temperature at San Lucas Ojitlan as warming stripes, 1952 to 1991 One stripe for each of 31 complete years at San Lucas Ojitlan, 1952 to 1991. Blue stripes are years cooler than the station's own mean of 25.0 C (76.9 F); red stripes are warmer. The coolest year was 1991, at 23.3 C (74.0 F), and the warmest was 1975, at 26.8 C (80.3 F). The strongest colour marks a difference of 1.9 C (3.4 F). 1952: 24.0 C, -0.9 C from the station mean1953: 25.1 C, +0.1 C from the station mean1954: 24.2 C, -0.8 C from the station mean1955: 25.1 C, +0.1 C from the station mean1956: 24.1 C, -0.8 C from the station mean1957: 25.2 C, +0.2 C from the station mean1958: 24.4 C, -0.6 C from the station mean1959: 24.1 C, -0.9 C from the station mean1960: 24.3 C, -0.7 C from the station mean1963: 25.4 C, +0.4 C from the station mean1964: 25.3 C, +0.3 C from the station mean1965: 25.1 C, +0.1 C from the station mean1966: 24.1 C, -0.9 C from the station mean1967: 24.8 C, -0.2 C from the station mean1968: 24.7 C, -0.3 C from the station mean1969: 25.1 C, +0.2 C from the station mean1970: 24.9 C, -0.1 C from the station mean1971: 25.7 C, +0.7 C from the station mean1972: 25.6 C, +0.7 C from the station mean1973: 25.7 C, +0.7 C from the station mean1974: 26.4 C, +1.4 C from the station mean1975: 26.8 C, +1.9 C from the station mean1976: 24.4 C, -0.6 C from the station mean1977: 25.3 C, +0.4 C from the station mean1978: 25.2 C, +0.3 C from the station mean1979: 25.8 C, +0.8 C from the station mean1981: 24.5 C, -0.4 C from the station mean1982: 26.0 C, +1.0 C from the station mean1983: 24.9 C, 0.0 C from the station mean1984: 24.5 C, -0.5 C from the station mean1991: 23.3 C, -1.6 C from the station mean195219551960196519701975198019851990
One stripe for each of 31 complete years at San Lucas Ojitlan, 1952 to 1991. Blue stripes are years cooler than the station's own mean of 25.0 C (76.9 F); red stripes are warmer. The coolest year was 1991, at 23.3 C (74.0 F), and the warmest was 1975, at 26.8 C (80.3 F). The strongest colour marks a difference of 1.9 C (3.4 F).
Annual mean temperature at San Lucas Ojitlan as warming stripes, 1952 to 1991
YearAnnual mean temperatureDifference from the station mean
195224.0 C-0.92 C
195325.1 C+0.10 C
195424.2 C-0.76 C
195525.1 C+0.11 C
195624.1 C-0.83 C
195725.2 C+0.20 C
195824.4 C-0.57 C
195924.1 C-0.89 C
196024.3 C-0.68 C
196325.4 C+0.39 C
196425.3 C+0.35 C
196525.1 C+0.15 C
196624.1 C-0.90 C
196724.8 C-0.16 C
196824.7 C-0.25 C
196925.1 C+0.18 C
197024.9 C-0.10 C
197125.7 C+0.71 C
197225.6 C+0.66 C
197325.7 C+0.70 C
197426.4 C+1.41 C
197526.8 C+1.86 C
197624.4 C-0.61 C
197725.3 C+0.37 C
197825.2 C+0.26 C
197925.8 C+0.80 C
198124.5 C-0.42 C
198226.0 C+1.00 C
198324.9 C-0.02 C
198424.5 C-0.51 C
199123.3 C-1.63 C

The fitted trend in annual mean temperature here over 1952 to 1991 is 0.2 C (-0.1 to 0.4) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.3 F (-0.2 to 0.8) 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 San Lucas Ojitlan
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.2 C (-0.1 to 0.4) per decade0.3 F (-0.2 to 0.8) per decade1952 to 199131Not clearly different from zero
Mean daily maximum0.2 C (-0.1 to 0.4) per decade0.3 F (-0.2 to 0.8) per decade1952 to 199131Not clearly different from zero
Mean daily minimum0.1 C (-0.3 to 0.6) per decade0.2 F (-0.6 to 1.1) per decade1952 to 199131Not 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

1951 to 2000
Yearly extremes at San Lucas Ojitlan: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)42.2 C (108.0 F)197538.9 C (102.0 F)37
Coldest night (TNn)5.6 C (42.1 F)200011.7 C (53.1 F)37
Wettest day (Rx1day)327.2 mm (12.9 in)1973166.9 mm (6.6 in)37
Wettest five days (Rx5day)724.4 mm (28.5 in)1991335.8 mm (13.2 in)37
Longest dry spell (CDD)70 days196223 days37

Hottest day (TXx)

Hottest day (TXx) at San Lucas Ojitlan by year The hottest day of the year at San Lucas Ojitlan, 1951 to 2000. The record is 42.2 C (108.0 F) in 1975, marked on the chart; the median year is 38.9 C (102.0 F). 3032.53537.54042.519601970198019902000Record: 42.2 C (108.0 F) in 1975
The hottest day of the year at San Lucas Ojitlan, 1951 to 2000. The record is 42.2 C (108.0 F) in 1975, marked on the chart; the median year is 38.9 C (102.0 F).
Hottest day (TXx) at San Lucas Ojitlan by year
YearHottest day (TXx)
195138.3 C (100.9 F)
195238.9 C (102.0 F)
195340.6 C (105.1 F)
195437.8 C (100.0 F)
195540.6 C (105.1 F)
195637.8 C (100.0 F)
195740.6 C (105.1 F)
195837.8 C (100.0 F)
195935.0 C (95.0 F)
196037.8 C (100.0 F)
196138.9 C (102.0 F)
196240.0 C (104.0 F)
196338.3 C (100.9 F)
196440.0 C (104.0 F)
196539.4 C (102.9 F)
196635.6 C (96.1 F)
196740.6 C (105.1 F)
196838.3 C (100.9 F)
196938.9 C (102.0 F)
197038.3 C (100.9 F)
197138.9 C (102.0 F)
197238.9 C (102.0 F)
197341.7 C (107.1 F)
197439.4 C (102.9 F)
197542.2 C (108.0 F)
197636.1 C (97.0 F)
197739.4 C (102.9 F)
197841.1 C (106.0 F)
197937.2 C (99.0 F)
198040.6 C (105.1 F)
198138.3 C (100.9 F)
198238.3 C (100.9 F)
198340.0 C (104.0 F)
198440.0 C (104.0 F)
198532.2 C (90.0 F)
199141.7 C (107.1 F)
200038.9 C (102.0 F)

Coldest night (TNn)

Coldest night (TNn) at San Lucas Ojitlan by year The coldest night of the year at San Lucas Ojitlan, 1951 to 2000. The record is 5.6 C (42.1 F) in 2000, marked on the chart; the median year is 11.7 C (53.1 F). 57.51012.51517.519601970198019902000Record: 5.6 C (42.1 F) in 2000
The coldest night of the year at San Lucas Ojitlan, 1951 to 2000. The record is 5.6 C (42.1 F) in 2000, marked on the chart; the median year is 11.7 C (53.1 F).
Coldest night (TNn) at San Lucas Ojitlan by year
YearColdest night (TNn)
19518.9 C (48.0 F)
195210.0 C (50.0 F)
195311.7 C (53.1 F)
195410.6 C (51.1 F)
195512.8 C (55.0 F)
195612.8 C (55.0 F)
195711.7 C (53.1 F)
195810.6 C (51.1 F)
195910.0 C (50.0 F)
19607.8 C (46.0 F)
196112.2 C (54.0 F)
196213.3 C (55.9 F)
196310.6 C (51.1 F)
196410.6 C (51.1 F)
196513.9 C (57.0 F)
196611.1 C (52.0 F)
196710.6 C (51.1 F)
196812.8 C (55.0 F)
196914.4 C (57.9 F)
197012.2 C (54.0 F)
197115.0 C (59.0 F)
197215.0 C (59.0 F)
197312.8 C (55.0 F)
197412.8 C (55.0 F)
197515.6 C (60.1 F)
197611.1 C (52.0 F)
197710.6 C (51.1 F)
197812.8 C (55.0 F)
197914.4 C (57.9 F)
198012.8 C (55.0 F)
198111.7 C (53.1 F)
198211.1 C (52.0 F)
19839.4 C (48.9 F)
198410.0 C (50.0 F)
198515.0 C (59.0 F)
199110.0 C (50.0 F)
20005.6 C (42.1 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at San Lucas Ojitlan by year The wettest day of the year at San Lucas Ojitlan, 1951 to 2000. The record is 327.2 mm (12.9 in) in 1973, marked on the chart; the median year is 166.9 mm (6.6 in). 010020030040019601970198019902000Record: 327.2 mm (12.9 in) in 1973
The wettest day of the year at San Lucas Ojitlan, 1951 to 2000. The record is 327.2 mm (12.9 in) in 1973, marked on the chart; the median year is 166.9 mm (6.6 in).
Wettest day (Rx1day) at San Lucas Ojitlan by year
YearWettest day (Rx1day)
1951149.4 mm (5.9 in)
1952162.3 mm (6.4 in)
1953133.9 mm (5.3 in)
1954166.9 mm (6.6 in)
1955188.0 mm (7.4 in)
1956282.4 mm (11.1 in)
1957140.0 mm (5.5 in)
1958213.9 mm (8.4 in)
1959113.8 mm (4.5 in)
1960216.9 mm (8.5 in)
1961179.8 mm (7.1 in)
1962129.8 mm (5.1 in)
1963136.4 mm (5.4 in)
1964163.3 mm (6.4 in)
1965120.9 mm (4.8 in)
1966212.9 mm (8.4 in)
1967208.3 mm (8.2 in)
1968150.4 mm (5.9 in)
1969226.3 mm (8.9 in)
1970194.6 mm (7.7 in)
1971161.0 mm (6.3 in)
1972193.3 mm (7.6 in)
1973327.2 mm (12.9 in)
1974211.1 mm (8.3 in)
1975150.9 mm (5.9 in)
1976177.0 mm (7.0 in)
1977129.8 mm (5.1 in)
1978147.8 mm (5.8 in)
1979149.9 mm (5.9 in)
1980184.9 mm (7.3 in)
1981171.5 mm (6.8 in)
1982127.3 mm (5.0 in)
1983103.9 mm (4.1 in)
1984234.2 mm (9.2 in)
19857.9 mm (0.31 in)
1991182.9 mm (7.2 in)
2000183.9 mm (7.2 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at San Lucas Ojitlan by year The wettest five days of the year at San Lucas Ojitlan, 1951 to 2000. The record is 724.4 mm (28.5 in) in 1991, marked on the chart; the median year is 335.8 mm (13.2 in). 020040060080019601970198019902000Record: 724.4 mm (28.5 in) in 1991
The wettest five days of the year at San Lucas Ojitlan, 1951 to 2000. The record is 724.4 mm (28.5 in) in 1991, marked on the chart; the median year is 335.8 mm (13.2 in).
Wettest five days (Rx5day) at San Lucas Ojitlan by year
YearWettest five days (Rx5day)
1951291.3 mm (11.5 in)
1952380.3 mm (15.0 in)
1953210.5 mm (8.3 in)
1954390.0 mm (15.4 in)
1955405.4 mm (16.0 in)
1956456.2 mm (18.0 in)
1957335.0 mm (13.2 in)
1958503.7 mm (19.8 in)
1959270.3 mm (10.6 in)
1960383.4 mm (15.1 in)
1961567.2 mm (22.3 in)
1962174.5 mm (6.9 in)
1963329.7 mm (13.0 in)
1964381.8 mm (15.0 in)
1965241.1 mm (9.5 in)
1966356.3 mm (14.0 in)
1967324.7 mm (12.8 in)
1968250.3 mm (9.9 in)
1969499.9 mm (19.7 in)
1970306.1 mm (12.1 in)
1971319.9 mm (12.6 in)
1972335.8 mm (13.2 in)
1973582.5 mm (22.9 in)
1974550.9 mm (21.7 in)
1975504.5 mm (19.9 in)
1976449.5 mm (17.7 in)
1977286.8 mm (11.3 in)
1978260.4 mm (10.3 in)
1979249.8 mm (9.8 in)
1980424.7 mm (16.7 in)
1981478.1 mm (18.8 in)
1982224.0 mm (8.8 in)
1983237.7 mm (9.4 in)
1984352.3 mm (13.9 in)
19859.7 mm (0.38 in)
1991724.4 mm (28.5 in)
2000293.6 mm (11.6 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at San Lucas Ojitlan by year The longest dry spell of the year at San Lucas Ojitlan, 1951 to 2000. The record is 70 days in 1962, marked on the chart; the median year is 23 days. 02040608019601970198019902000Record: 70 days in 1962
The longest dry spell of the year at San Lucas Ojitlan, 1951 to 2000. The record is 70 days in 1962, marked on the chart; the median year is 23 days.
Longest dry spell (CDD) at San Lucas Ojitlan by year
YearLongest dry spell (CDD)
195137 days
195221 days
195321 days
195423 days
195533 days
195618 days
195731 days
195832 days
195911 days
196031 days
196152 days
196270 days
196337 days
196424 days
196523 days
196620 days
196722 days
196817 days
196918 days
197025 days
197137 days
197219 days
197321 days
197414 days
197539 days
197634 days
197728 days
197820 days
197916 days
198062 days
198122 days
198223 days
198339 days
198422 days
198519 days
199133 days
200048 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

36 years, 1951 to 2000

A day with at least 167.8 mm (6.6 in) of rain is expected about once in 2 years. A day with at least 324.3 mm (12.8 in) of rain is expected about once in 100 years.

Rainfall return levels at San Lucas Ojitlan: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years167.8 mm (6.6 in)
5 years209.1 mm (8.2 in)
10 years236.7 mm (9.3 in)
25 years271.8 mm (10.7 in)
50 years298.0 mm (11.7 in)Longer than the 36 years of record
100 years324.3 mm (12.8 in)Longer than the 36 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, 36 years of values from 1951 to 2000.

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: 327.2 mm (12.9 in) in 1973; 282.4 mm (11.1 in) in 1956; 234.2 mm (9.2 in) in 1984.

Download the Data

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