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Built 2026-10-18 (18 October 2026)

Altamirano (Smn) Weather Records (MXN00007006)

Record envelope, standing records and threshold days for Altamirano (Smn) (MXN00007006), Mexico, with 72 years of record.

Key Facts for Altamirano (Smn)

  • Altamirano (Smn) (MXN00007006) is a weather station in Mexico at 16.73 latitude and -92.03 longitude, 1,240 m (4,068 ft) above sea level.
  • The station reports from 1942 to 2013, 72 years of record.
  • 1,464 records set at Altamirano (Smn) still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Altamirano (Smn) tied a monthly record low minimum temperature of 5.6 C (42.1 F) on 10 May 2013.

About the Station

  • Location: Mexico, 16.73 latitude, -92.03 longitude.
  • Elevation: 1,240 m (4,068 ft).
  • Period of record: 1942 to 2013, 72 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 Altamirano (Smn), with 2026 drawn through them The band shows the record high and record low for each calendar day at Altamirano (Smn). The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -1001020304050 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Altamirano (Smn). 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 Altamirano (Smn), with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan35.0 C (95.0 F)0.0 C (32.0 F)n/an/a
Feb37.8 C (100.0 F)-2.2 C (28.0 F)n/an/a
Mar40.6 C (105.1 F)-1.1 C (30.0 F)n/an/a
Apr40.0 C (104.0 F)1.1 C (34.0 F)n/an/a
May40.0 C (104.0 F)5.6 C (42.1 F)n/an/a
Jun37.8 C (100.0 F)5.6 C (42.1 F)n/an/a
Jul35.0 C (95.0 F)5.0 C (41.0 F)n/an/a
Aug35.0 C (95.0 F)0.6 C (33.1 F)n/an/a
Sep35.0 C (95.0 F)3.9 C (39.0 F)n/an/a
Oct35.6 C (96.1 F)3.9 C (39.0 F)n/an/a
Nov37.2 C (99.0 F)0.0 C (32.0 F)n/an/a
Dec35.0 C (95.0 F)0.0 C (32.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Altamirano (Smn) by the year they were set 1,464 records at Altamirano (Smn) still stand. 1999 holds the most, with 213. 01002003001942: 421943: 561944: 241945: 101946: 521947: 481948: 131949: 191950: 341951: 301952: 341953: 2011954: 281955: 351956: 111957: 81958: 131959: 101960: 81961: 51962: 61963: 101964: 101965: 31966: 71967: 41968: 51969: 81970: 21971: 31972: 71973: 91974: 71975: 51976: 31977: 81978: 121979: 91980: 21981: 21982: 31983: 41984: 41985: 41986: 51987: 11988: 91989: 51990: 11991: 71992: 41993: 31994: 51995: 311996: 351997: 171998: 921999: 2132000: 232001: 52002: 92003: 442004: 232005: 272006: 202007: 122008: 162009: 52010: 142011: 102012: 72013: 3194219501958196619741982199019982006
1,464 records at Altamirano (Smn) still stand. 1999 holds the most, with 213.
Standing records at Altamirano (Smn) by the year they were set
Year setStanding records
194242
194356
194424
194510
194652
194748
194813
194919
195034
195130
195234
1953201
195428
195535
195611
19578
195813
195910
19608
19615
19626
196310
196410
19653
19667
19674
19685
19698
19702
19713
19727
19739
19747
19755
19763
19778
197812
19799
19802
19812
19823
19834
19844
19854
19865
19871
19889
19895
19901
19917
19924
19933
19945
199531
199635
199717
199892
1999213
200023
20015
20029
200344
200423
200527
200620
200712
200816
20095
201014
201110
20127
20133

All-Time Record Progression

5 new records
When Altamirano (Smn) set new all-time records 5 all-time records were set at Altamirano (Smn) between 14 December 1997 and 19 March 2003. Each dot is a new record. Record low maximum temperatureRecord low minimum temperatureRecord high maximum temperature14 December 1997: Record low maximum temperature 10.6 C (51.1 F)22 December 1997: Record low maximum temperature 10.0 C (50.0 F)4 February 1998: Record low maximum temperature 8.3 C (46.9 F)4 February 1998: Record low minimum temperature -2.2 C (28.0 F)19 March 2003: Record high maximum temperature 40.6 C (105.1 F)2000
5 all-time records were set at Altamirano (Smn) between 14 December 1997 and 19 March 2003. Each dot is a new record.
When Altamirano (Smn) set new all-time records
DateKindDetail
1997-12-14Record low maximum temperatureRecord low maximum temperature 10.6 C (51.1 F)
1997-12-22Record low maximum temperatureRecord low maximum temperature 10.0 C (50.0 F)
1998-02-04Record low maximum temperatureRecord low maximum temperature 8.3 C (46.9 F)
1998-02-04Record low minimum temperatureRecord low minimum temperature -2.2 C (28.0 F)
2003-03-19Record high maximum temperatureRecord high maximum temperature 40.6 C (105.1 F)

Wettest Day of Each Month

Oct: 137.9 mm (5.4 in)
Record daily precipitation for each month at Altamirano (Smn) The wettest day on record for each calendar month at Altamirano (Smn). The most was 137.9 mm (5.4 in) on 7 October 1950. 050100150 Jan: 49.8 mm (2.0 in), 13 January 1988 Jan Feb: 65.5 mm (2.6 in), 26 February 1982 Feb Mar: 89.4 mm (3.5 in), 26 March 1996 Mar Apr: 51.8 mm (2.0 in), 22 April 1978 Apr May: 95.0 mm (3.7 in), 20 May 1965 May Jun: 88.9 mm (3.5 in), 7 June 2011 Jun Jul: 99.8 mm (3.9 in), 2 July 1968 Jul Aug: 97.0 mm (3.8 in), 16 August 2012 Aug Sep: 117.3 mm (4.6 in), 28 September 1967 Sep Oct: 137.9 mm (5.4 in), 7 October 1950 Oct Nov: 104.9 mm (4.1 in), 9 November 1971 Nov Dec: 95.0 mm (3.7 in), 19 December 2001 Dec
The wettest day on record for each calendar month at Altamirano (Smn). The most was 137.9 mm (5.4 in) on 7 October 1950.
Record daily precipitation for each month at Altamirano (Smn)
MonthRecord daily precipitation (mm)Date
Jan49.8 mm (2.0 in)13 January 1988
Feb65.5 mm (2.6 in)26 February 1982
Mar89.4 mm (3.5 in)26 March 1996
Apr51.8 mm (2.0 in)22 April 1978
May95.0 mm (3.7 in)20 May 1965
Jun88.9 mm (3.5 in)7 June 2011
Jul99.8 mm (3.9 in)2 July 1968
Aug97.0 mm (3.8 in)16 August 2012
Sep117.3 mm (4.6 in)28 September 1967
Oct137.9 mm (5.4 in)7 October 1950
Nov104.9 mm (4.1 in)9 November 1971
Dec95.0 mm (3.7 in)19 December 2001

Period of Record Coverage

1942 to 2013
Days with data per year at Altamirano (Smn) 72 years of record at Altamirano (Smn), 1942 to 2013. 11 years have data for under 90 percent of days and are left out of rankings: 1942, 1945, 1948, 1953, 1969, 1973, 1982, 1986 and others. 1942: 122 of 365 days1943: 365 of 365 days1944: 366 of 366 days1945: 304 of 365 days1946: 360 of 365 days1947: 365 of 365 days1948: 312 of 366 days1949: 365 of 365 days1950: 365 of 365 days1951: 365 of 365 days1952: 366 of 366 days1953: 320 of 365 days1954: 365 of 365 days1955: 365 of 365 days1956: 366 of 366 days1957: 364 of 365 days1958: 364 of 365 days1959: 364 of 365 days1960: 366 of 366 days1961: 364 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 335 of 365 days1968: 365 of 366 days1969: 309 of 365 days1970: 363 of 365 days1971: 364 of 365 days1972: 366 of 366 days1973: 212 of 365 days1974: 350 of 365 days1975: 358 of 365 days1976: 359 of 366 days1977: 350 of 365 days1978: 353 of 365 days1979: 358 of 365 days1980: 358 of 366 days1981: 359 of 365 days1982: 327 of 365 days1983: 359 of 365 days1984: 359 of 366 days1985: 355 of 365 days1986: 190 of 365 days1987: 342 of 365 days1988: 366 of 366 days1989: 365 of 365 days1990: 365 of 365 days1991: 365 of 365 days1992: 365 of 366 days1993: 365 of 365 days1994: 364 of 365 days1995: 365 of 365 days1996: 366 of 366 days1997: 363 of 365 days1998: 295 of 365 days1999: 324 of 365 days2000: 366 of 366 days2001: 353 of 365 days2002: 352 of 365 days2003: 355 of 365 days2004: 340 of 366 days2005: 341 of 365 days2006: 356 of 365 days2007: 353 of 365 days2008: 358 of 366 days2009: 357 of 365 days2010: 360 of 365 days2011: 362 of 365 days2012: 364 of 366 days2013: 151 of 365 days1950196019701980199020002010
72 years of record at Altamirano (Smn), 1942 to 2013. 11 years have data for under 90 percent of days and are left out of rankings: 1942, 1945, 1948, 1953, 1969, 1973, 1982, 1986 and others.
Days with data per year at Altamirano (Smn)
YearDays with dataShare of yearComplete
194212233%No
1943365100%Yes
1944366100%Yes
194530483%No
194636099%Yes
1947365100%Yes
194831285%No
1949365100%Yes
1950365100%Yes
1951365100%Yes
1952366100%Yes
195332088%No
1954365100%Yes
1955365100%Yes
1956366100%Yes
1957364100%Yes
1958364100%Yes
1959364100%Yes
1960366100%Yes
1961364100%Yes
1962365100%Yes
1963365100%Yes
1964366100%Yes
1965365100%Yes
1966365100%Yes
196733592%Yes
1968365100%Yes
196930985%No
197036399%Yes
1971364100%Yes
1972366100%Yes
197321258%No
197435096%Yes
197535898%Yes
197635998%Yes
197735096%Yes
197835397%Yes
197935898%Yes
198035898%Yes
198135998%Yes
198232790%No
198335998%Yes
198435998%Yes
198535597%Yes
198619052%No
198734294%Yes
1988366100%Yes
1989365100%Yes
1990365100%Yes
1991365100%Yes
1992365100%Yes
1993365100%Yes
1994364100%Yes
1995365100%Yes
1996366100%Yes
199736399%Yes
199829581%No
199932489%No
2000366100%Yes
200135397%Yes
200235296%Yes
200335597%Yes
200434093%Yes
200534193%Yes
200635698%Yes
200735397%Yes
200835898%Yes
200935798%Yes
201036099%Yes
201136299%Yes
201236499%Yes
201315141%No

Latest Records

20
Latest records at Altamirano (Smn)
DateStationRecordValueBeat old record byOld record stoodSignificance
10 May 2013Altamirano (Smn), MXmonthly low min (Tie)5.6 C (42.1 F)tie59 years8 of 100 (Routine)
7 April 2013Altamirano (Smn), MXdaily low min (Tie)5.6 C (42.1 F)tie12 years2 of 100 (Routine)
31 March 2013Altamirano (Smn), MXdaily low min (Tie)2.8 C (37.0 F)tie16 years3 of 100 (Routine)
30 March 2013Altamirano (Smn), MXdaily low min (Tie)5.0 C (41.0 F)tie12 years2 of 100 (Routine)
27 March 2013Altamirano (Smn), MXdaily low max (Tie)18.9 C (66.0 F)tie35 years4 of 100 (Routine)
24 March 2013Altamirano (Smn), MXdaily high max (Tie)36.7 C (98.1 F)tie40 years4 of 100 (Routine)
23 March 2013Altamirano (Smn), MXdaily high max (Tie)35.6 C (96.1 F)tie59 years6 of 100 (Routine)
4 March 2013Altamirano (Smn), MXmonthly low min-1.1 C (30.0 F)1.1 C (2.0 F)4 years21 of 100 (Routine)
3 March 2013Altamirano (Smn), MXdaily low min1.7 C (35.1 F)1.1 C (2.0 F)16 years15 of 100 (Routine)
21 December 2012Altamirano (Smn), MXdaily rain25.9 mm (1.0 in)5.6 mm (0.22 in)13 years16 of 100 (Routine)
10 December 2012Altamirano (Smn), MXdaily low min (Tie)1.7 C (35.1 F)tie17 years3 of 100 (Routine)
9 December 2012Altamirano (Smn), MXdaily low min (Tie)0.6 C (33.1 F)tie2 years1 of 100 (Routine)
26 November 2012Altamirano (Smn), MXdaily high min17.8 C (64.0 F)2.2 C (4.0 F)41 years26 of 100 (Routine)
20 November 2012Altamirano (Smn), MXdaily low min (Tie)5.0 C (41.0 F)tie8 years2 of 100 (Routine)
17 September 2012Altamirano (Smn), MXdaily rain100.8 mm (4.0 in)38.8 mm (1.5 in)12 years36 of 100 (Notable)
16 August 2012Altamirano (Smn), MXmonthly rain97.0 mm (3.8 in)9.6 mm (0.38 in)43 years36 of 100 (Notable)
27 July 2012Altamirano (Smn), MXdaily high max (Tie)32.8 C (91.0 F)tie59 years6 of 100 (Routine)
22 June 2012Altamirano (Smn), MXdaily rain62.5 mm (2.5 in)4.8 mm (0.19 in)13 years13 of 100 (Routine)
10 June 2012Altamirano (Smn), MXdaily high max (Tie)33.9 C (93.0 F)tie59 years6 of 100 (Routine)
1 June 2012Altamirano (Smn), MXdaily rain50.8 mm (2.0 in)1.0 mm (0.04 in)21 years13 of 100 (Routine)

Climate Trend

58 complete years, 1943 to 2012
Annual mean temperature at Altamirano (Smn) as warming stripes, 1943 to 2012 One stripe for each of 58 complete years at Altamirano (Smn), 1943 to 2012. Blue stripes are years cooler than the station's own mean of 19.6 C (67.2 F); red stripes are warmer. The coolest year was 2000, at 17.9 C (64.2 F), and the warmest was 1955, at 21.7 C (71.1 F). The strongest colour marks a difference of 2.2 C (4.0 F). 1943: 19.4 C, -0.2 C from the station mean1944: 19.9 C, +0.4 C from the station mean1946: 19.3 C, -0.3 C from the station mean1947: 21.6 C, +2.1 C from the station mean1949: 21.3 C, +1.7 C from the station mean1950: 20.4 C, +0.8 C from the station mean1951: 19.8 C, +0.2 C from the station mean1952: 20.9 C, +1.3 C from the station mean1954: 21.2 C, +1.6 C from the station mean1955: 21.7 C, +2.1 C from the station mean1956: 20.1 C, +0.5 C from the station mean1957: 19.9 C, +0.3 C from the station mean1958: 20.3 C, +0.7 C from the station mean1959: 19.8 C, +0.2 C from the station mean1960: 20.0 C, +0.4 C from the station mean1961: 19.8 C, +0.2 C from the station mean1962: 19.6 C, +0.1 C from the station mean1963: 20.0 C, +0.4 C from the station mean1964: 19.8 C, +0.2 C from the station mean1965: 19.6 C, 0.0 C from the station mean1966: 18.9 C, -0.7 C from the station mean1968: 19.0 C, -0.6 C from the station mean1970: 18.6 C, -1.0 C from the station mean1971: 18.6 C, -1.0 C from the station mean1972: 19.3 C, -0.3 C from the station mean1974: 19.3 C, -0.2 C from the station mean1975: 19.4 C, -0.2 C from the station mean1976: 18.6 C, -0.9 C from the station mean1977: 19.2 C, -0.3 C from the station mean1978: 18.9 C, -0.6 C from the station mean1979: 19.4 C, -0.2 C from the station mean1980: 19.0 C, -0.6 C from the station mean1981: 18.8 C, -0.7 C from the station mean1983: 19.1 C, -0.5 C from the station mean1984: 18.7 C, -0.9 C from the station mean1985: 18.8 C, -0.7 C from the station mean1988: 20.1 C, +0.6 C from the station mean1989: 19.0 C, -0.6 C from the station mean1990: 19.0 C, -0.6 C from the station mean1991: 19.6 C, 0.0 C from the station mean1992: 19.4 C, -0.2 C from the station mean1993: 19.1 C, -0.5 C from the station mean1994: 19.3 C, -0.3 C from the station mean1995: 19.9 C, +0.3 C from the station mean1997: 18.0 C, -1.6 C from the station mean2000: 17.9 C, -1.7 C from the station mean2001: 19.4 C, -0.2 C from the station mean2002: 19.4 C, -0.2 C from the station mean2003: 20.3 C, +0.7 C from the station mean2004: 19.8 C, +0.2 C from the station mean2005: 20.1 C, +0.5 C from the station mean2006: 20.1 C, +0.5 C from the station mean2007: 20.1 C, +0.5 C from the station mean2008: 19.6 C, 0.0 C from the station mean2009: 19.5 C, 0.0 C from the station mean2010: 19.6 C, 0.0 C from the station mean2011: 19.4 C, -0.2 C from the station mean2012: 19.0 C, -0.6 C from the station mean19431950196019701980199020002010
One stripe for each of 58 complete years at Altamirano (Smn), 1943 to 2012. Blue stripes are years cooler than the station's own mean of 19.6 C (67.2 F); red stripes are warmer. The coolest year was 2000, at 17.9 C (64.2 F), and the warmest was 1955, at 21.7 C (71.1 F). The strongest colour marks a difference of 2.2 C (4.0 F).
Annual mean temperature at Altamirano (Smn) as warming stripes, 1943 to 2012
YearAnnual mean temperatureDifference from the station mean
194319.4 C-0.15 C
194419.9 C+0.36 C
194619.3 C-0.25 C
194721.6 C+2.07 C
194921.3 C+1.70 C
195020.4 C+0.84 C
195119.8 C+0.23 C
195220.9 C+1.35 C
195421.2 C+1.64 C
195521.7 C+2.13 C
195620.1 C+0.55 C
195719.9 C+0.31 C
195820.3 C+0.73 C
195919.8 C+0.23 C
196020.0 C+0.42 C
196119.8 C+0.20 C
196219.6 C+0.07 C
196320.0 C+0.39 C
196419.8 C+0.24 C
196519.6 C+0.02 C
196618.9 C-0.65 C
196819.0 C-0.60 C
197018.6 C-0.97 C
197118.6 C-1.00 C
197219.3 C-0.28 C
197419.3 C-0.23 C
197519.4 C-0.18 C
197618.6 C-0.94 C
197719.2 C-0.33 C
197818.9 C-0.64 C
197919.4 C-0.22 C
198019.0 C-0.60 C
198118.8 C-0.74 C
198319.1 C-0.52 C
198418.7 C-0.90 C
198518.8 C-0.74 C
198820.1 C+0.57 C
198919.0 C-0.61 C
199019.0 C-0.58 C
199119.6 C+0.01 C
199219.4 C-0.21 C
199319.1 C-0.49 C
199419.3 C-0.32 C
199519.9 C+0.28 C
199718.0 C-1.56 C
200017.9 C-1.68 C
200119.4 C-0.19 C
200219.4 C-0.20 C
200320.3 C+0.75 C
200419.8 C+0.19 C
200520.1 C+0.50 C
200620.1 C+0.52 C
200720.1 C+0.48 C
200819.6 C+0.03 C
200919.5 C-0.03 C
201019.6 C+0.01 C
201119.4 C-0.18 C
201219.0 C-0.62 C

The annual mean temperature here has fallen by 0.1 C (0.1 to 0.2) per decade over 1943 to 2012. In Fahrenheit: 0.3 F (0.1 to 0.4) per decade. The slope is a straight line fitted to 58 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Altamirano (Smn)
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.1 C (-0.2 to -0.1) per decade-0.3 F (-0.4 to -0.1) per decade1943 to 201258Fall
Mean daily maximum0.15 C (-0.02 to 0.33) per decade0.28 F (-0.04 to 0.59) per decade1943 to 201258Not clearly different from zero
Mean daily minimum-0.5 C (-0.5 to -0.4) per decade-0.8 F (-0.9 to -0.7) per decade1943 to 201258Fall

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

1942 to 2013
Yearly extremes at Altamirano (Smn): the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)40.6 C (105.1 F)200335.3 C (95.5 F)72
Coldest night (TNn)-2.2 C (28.0 F)19982.0 C (35.5 F)72
Wettest day (Rx1day)137.9 mm (5.4 in)195073.1 mm (2.9 in)72
Wettest five days (Rx5day)261.6 mm (10.3 in)1982140.7 mm (5.5 in)72
Longest dry spell (CDD)83 days194422 days72

Hottest day (TXx)

Hottest day (TXx) at Altamirano (Smn) by year The hottest day of the year at Altamirano (Smn), 1942 to 2013. The record is 40.6 C (105.1 F) in 2003, marked on the chart; the median year is 35.3 C (95.5 F). 202530354045196019802000Record: 40.6 C (105.1 F) in 2003
The hottest day of the year at Altamirano (Smn), 1942 to 2013. The record is 40.6 C (105.1 F) in 2003, marked on the chart; the median year is 35.3 C (95.5 F).
Hottest day (TXx) at Altamirano (Smn) by year
YearHottest day (TXx)
194231.7 C (89.1 F)
194330.0 C (86.0 F)
194435.0 C (95.0 F)
194536.7 C (98.1 F)
194635.0 C (95.0 F)
194734.4 C (93.9 F)
194836.7 C (98.1 F)
194935.0 C (95.0 F)
195033.9 C (93.0 F)
195136.7 C (98.1 F)
195238.9 C (102.0 F)
195335.0 C (95.0 F)
195437.2 C (99.0 F)
195540.0 C (104.0 F)
195638.9 C (102.0 F)
195735.6 C (96.1 F)
195835.0 C (95.0 F)
195932.8 C (91.0 F)
196035.0 C (95.0 F)
196135.6 C (96.1 F)
196237.8 C (100.0 F)
196335.0 C (95.0 F)
196435.6 C (96.1 F)
196535.0 C (95.0 F)
196633.9 C (93.0 F)
196733.9 C (93.0 F)
196835.0 C (95.0 F)
196937.8 C (100.0 F)
197035.6 C (96.1 F)
197134.4 C (93.9 F)
197233.9 C (93.0 F)
197337.8 C (100.0 F)
197435.0 C (95.0 F)
197533.9 C (93.0 F)
197632.8 C (91.0 F)
197735.0 C (95.0 F)
197835.0 C (95.0 F)
197933.9 C (93.0 F)
198033.9 C (93.0 F)
198131.7 C (89.1 F)
198233.9 C (93.0 F)
198336.7 C (98.1 F)
198436.7 C (98.1 F)
198532.8 C (91.0 F)
198633.9 C (93.0 F)
198730.6 C (87.1 F)
198836.1 C (97.0 F)
198935.0 C (95.0 F)
199033.9 C (93.0 F)
199140.0 C (104.0 F)
199233.9 C (93.0 F)
199335.6 C (96.1 F)
199435.6 C (96.1 F)
199536.7 C (98.1 F)
199636.7 C (98.1 F)
199737.8 C (100.0 F)
199823.3 C (73.9 F)
199921.7 C (71.1 F)
200036.7 C (98.1 F)
200137.2 C (99.0 F)
200235.6 C (96.1 F)
200340.6 C (105.1 F)
200437.8 C (100.0 F)
200537.8 C (100.0 F)
200640.0 C (104.0 F)
200740.0 C (104.0 F)
200837.8 C (100.0 F)
200937.8 C (100.0 F)
201038.9 C (102.0 F)
201136.7 C (98.1 F)
201235.0 C (95.0 F)
201336.7 C (98.1 F)

Coldest night (TNn)

Coldest night (TNn) at Altamirano (Smn) by year The coldest night of the year at Altamirano (Smn), 1942 to 2013. The record is -2.2 C (28.0 F) in 1998, marked on the chart; the median year is 2.0 C (35.5 F). -5051015196019802000Record: -2.2 C (28.0 F) in 1998
The coldest night of the year at Altamirano (Smn), 1942 to 2013. The record is -2.2 C (28.0 F) in 1998, marked on the chart; the median year is 2.0 C (35.5 F).
Coldest night (TNn) at Altamirano (Smn) by year
YearColdest night (TNn)
194213.9 C (57.0 F)
19435.6 C (42.1 F)
19445.6 C (42.1 F)
19452.8 C (37.0 F)
19460.6 C (33.1 F)
19477.2 C (45.0 F)
19485.0 C (41.0 F)
19496.7 C (44.1 F)
19505.0 C (41.0 F)
19515.0 C (41.0 F)
19526.7 C (44.1 F)
19532.8 C (37.0 F)
19540.0 C (32.0 F)
19555.0 C (41.0 F)
19563.9 C (39.0 F)
19572.8 C (37.0 F)
19583.9 C (39.0 F)
19595.6 C (42.1 F)
19600.0 C (32.0 F)
19615.6 C (42.1 F)
19623.9 C (39.0 F)
19632.8 C (37.0 F)
19641.7 C (35.1 F)
19655.0 C (41.0 F)
19662.8 C (37.0 F)
19673.9 C (39.0 F)
19682.8 C (37.0 F)
19693.3 C (37.9 F)
19702.2 C (36.0 F)
19710.6 C (33.1 F)
19720.0 C (32.0 F)
19732.8 C (37.0 F)
19742.2 C (36.0 F)
19750.6 C (33.1 F)
19762.2 C (36.0 F)
19771.7 C (35.1 F)
19780.6 C (33.1 F)
19793.3 C (37.9 F)
19800.6 C (33.1 F)
19812.8 C (37.0 F)
19823.9 C (39.0 F)
19831.7 C (35.1 F)
19841.7 C (35.1 F)
19852.8 C (37.0 F)
19868.9 C (48.0 F)
19875.0 C (41.0 F)
19885.0 C (41.0 F)
19890.0 C (32.0 F)
19903.9 C (39.0 F)
19910.6 C (33.1 F)
19921.7 C (35.1 F)
19931.7 C (35.1 F)
19941.1 C (34.0 F)
19951.7 C (35.1 F)
19960.6 C (33.1 F)
19971.1 C (34.0 F)
1998-2.2 C (28.0 F)
19990.6 C (33.1 F)
20000.0 C (32.0 F)
20011.7 C (35.1 F)
20020.0 C (32.0 F)
20031.1 C (34.0 F)
20041.7 C (35.1 F)
20050.0 C (32.0 F)
20061.7 C (35.1 F)
20070.6 C (33.1 F)
20080.6 C (33.1 F)
20090.0 C (32.0 F)
20100.6 C (33.1 F)
20111.7 C (35.1 F)
20120.6 C (33.1 F)
2013-1.1 C (30.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Altamirano (Smn) by year The wettest day of the year at Altamirano (Smn), 1942 to 2013. The record is 137.9 mm (5.4 in) in 1950, marked on the chart; the median year is 73.1 mm (2.9 in). 255075100125150196019802000Record: 137.9 mm (5.4 in) in 1950
The wettest day of the year at Altamirano (Smn), 1942 to 2013. The record is 137.9 mm (5.4 in) in 1950, marked on the chart; the median year is 73.1 mm (2.9 in).
Wettest day (Rx1day) at Altamirano (Smn) by year
YearWettest day (Rx1day)
194247.0 mm (1.9 in)
194395.0 mm (3.7 in)
194471.9 mm (2.8 in)
194557.9 mm (2.3 in)
194677.0 mm (3.0 in)
194772.9 mm (2.9 in)
194879.8 mm (3.1 in)
194947.0 mm (1.9 in)
1950137.9 mm (5.4 in)
195158.9 mm (2.3 in)
195283.8 mm (3.3 in)
195395.8 mm (3.8 in)
195462.0 mm (2.4 in)
195559.9 mm (2.4 in)
195658.9 mm (2.3 in)
195799.8 mm (3.9 in)
195865.3 mm (2.6 in)
195983.8 mm (3.3 in)
196062.0 mm (2.4 in)
196191.9 mm (3.6 in)
196265.8 mm (2.6 in)
196382.8 mm (3.3 in)
196485.3 mm (3.4 in)
196595.0 mm (3.7 in)
196676.5 mm (3.0 in)
1967117.3 mm (4.6 in)
196899.8 mm (3.9 in)
196987.4 mm (3.4 in)
197065.8 mm (2.6 in)
1971104.9 mm (4.1 in)
1972102.9 mm (4.1 in)
197349.8 mm (2.0 in)
197488.9 mm (3.5 in)
197583.8 mm (3.3 in)
197641.4 mm (1.6 in)
197749.8 mm (2.0 in)
1978104.6 mm (4.1 in)
197993.0 mm (3.7 in)
1980104.9 mm (4.1 in)
198174.9 mm (2.9 in)
198280.8 mm (3.2 in)
198379.8 mm (3.1 in)
198449.8 mm (2.0 in)
198559.4 mm (2.3 in)
198648.8 mm (1.9 in)
198753.8 mm (2.1 in)
1988110.0 mm (4.3 in)
198969.9 mm (2.8 in)
199073.2 mm (2.9 in)
199151.8 mm (2.0 in)
199243.9 mm (1.7 in)
199351.8 mm (2.0 in)
199475.9 mm (3.0 in)
199565.5 mm (2.6 in)
199689.4 mm (3.5 in)
199775.2 mm (3.0 in)
199866.0 mm (2.6 in)
199962.0 mm (2.4 in)
200062.0 mm (2.4 in)
200195.0 mm (3.7 in)
200249.5 mm (1.9 in)
200352.3 mm (2.1 in)
200452.1 mm (2.1 in)
200558.7 mm (2.3 in)
200667.1 mm (2.6 in)
200790.9 mm (3.6 in)
200872.4 mm (2.9 in)
200969.1 mm (2.7 in)
201095.3 mm (3.8 in)
201188.9 mm (3.5 in)
2012100.8 mm (4.0 in)
201369.1 mm (2.7 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Altamirano (Smn) by year The wettest five days of the year at Altamirano (Smn), 1942 to 2013. The record is 261.6 mm (10.3 in) in 1982, marked on the chart; the median year is 140.7 mm (5.5 in). 50100150200250300196019802000Record: 261.6 mm (10.3 in) in 1982
The wettest five days of the year at Altamirano (Smn), 1942 to 2013. The record is 261.6 mm (10.3 in) in 1982, marked on the chart; the median year is 140.7 mm (5.5 in).
Wettest five days (Rx5day) at Altamirano (Smn) by year
YearWettest five days (Rx5day)
1942114.0 mm (4.5 in)
1943207.5 mm (8.2 in)
1944122.4 mm (4.8 in)
194599.3 mm (3.9 in)
1946109.5 mm (4.3 in)
1947185.1 mm (7.3 in)
1948151.2 mm (6.0 in)
194977.7 mm (3.1 in)
1950197.2 mm (7.8 in)
1951131.1 mm (5.2 in)
1952169.1 mm (6.7 in)
1953135.7 mm (5.3 in)
1954135.2 mm (5.3 in)
1955121.1 mm (4.8 in)
1956114.6 mm (4.5 in)
1957200.1 mm (7.9 in)
1958125.2 mm (4.9 in)
1959115.4 mm (4.5 in)
1960215.4 mm (8.5 in)
1961110.3 mm (4.3 in)
1962125.1 mm (4.9 in)
1963169.1 mm (6.7 in)
1964143.5 mm (5.6 in)
1965114.8 mm (4.5 in)
1966157.0 mm (6.2 in)
1967192.5 mm (7.6 in)
1968205.5 mm (8.1 in)
1969158.0 mm (6.2 in)
1970135.9 mm (5.4 in)
1971161.3 mm (6.4 in)
1972149.4 mm (5.9 in)
1973112.5 mm (4.4 in)
1974151.7 mm (6.0 in)
1975134.6 mm (5.3 in)
197677.4 mm (3.0 in)
1977139.5 mm (5.5 in)
1978147.6 mm (5.8 in)
1979184.2 mm (7.3 in)
1980127.8 mm (5.0 in)
1981143.8 mm (5.7 in)
1982261.6 mm (10.3 in)
1983222.6 mm (8.8 in)
1984141.8 mm (5.6 in)
1985129.9 mm (5.1 in)
198699.9 mm (3.9 in)
1987146.6 mm (5.8 in)
1988223.1 mm (8.8 in)
1989247.4 mm (9.7 in)
1990135.4 mm (5.3 in)
1991161.3 mm (6.4 in)
1992136.9 mm (5.4 in)
1993124.0 mm (4.9 in)
1994124.8 mm (4.9 in)
1995212.9 mm (8.4 in)
1996131.1 mm (5.2 in)
1997200.5 mm (7.9 in)
1998184.9 mm (7.3 in)
1999134.9 mm (5.3 in)
2000170.6 mm (6.7 in)
2001128.0 mm (5.0 in)
2002136.7 mm (5.4 in)
2003111.3 mm (4.4 in)
200497.9 mm (3.9 in)
2005143.8 mm (5.7 in)
2006147.8 mm (5.8 in)
2007185.4 mm (7.3 in)
2008130.3 mm (5.1 in)
2009158.0 mm (6.2 in)
2010175.6 mm (6.9 in)
2011138.5 mm (5.5 in)
2012153.4 mm (6.0 in)
201393.7 mm (3.7 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Altamirano (Smn) by year The longest dry spell of the year at Altamirano (Smn), 1942 to 2013. The record is 83 days in 1944, marked on the chart; the median year is 22 days. 020406080100196019802000Record: 83 days in 1944
The longest dry spell of the year at Altamirano (Smn), 1942 to 2013. The record is 83 days in 1944, marked on the chart; the median year is 22 days.
Longest dry spell (CDD) at Altamirano (Smn) by year
YearLongest dry spell (CDD)
19427 days
194326 days
194483 days
194552 days
194628 days
194723 days
194820 days
194925 days
195022 days
195123 days
195225 days
195316 days
195412 days
195543 days
195634 days
195721 days
195823 days
195912 days
196019 days
196115 days
196235 days
196322 days
196416 days
196529 days
196617 days
196738 days
196819 days
196914 days
197033 days
197133 days
197222 days
197343 days
197426 days
197535 days
197615 days
197726 days
197815 days
19799 days
198018 days
198119 days
198214 days
198343 days
198435 days
198519 days
198661 days
198722 days
198815 days
198922 days
199012 days
199120 days
199217 days
199320 days
199418 days
199515 days
199619 days
199720 days
199846 days
199919 days
200032 days
200122 days
200244 days
200322 days
200419 days
200522 days
200618 days
200722 days
200815 days
200918 days
201026 days
201115 days
201224 days
201330 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

66 years, 1943 to 2012

A day with at least 74.9 mm (2.9 in) of rain is expected about once in 2 years. A day with at least 129.7 mm (5.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Altamirano (Smn): the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years74.9 mm (2.9 in)
5 years93.2 mm (3.7 in)
10 years103.7 mm (4.1 in)
25 years115.3 mm (4.5 in)
50 years122.9 mm (4.8 in)
100 years129.7 mm (5.1 in)Longer than the 66 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, 66 years of values from 1943 to 2012.

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: 137.9 mm (5.4 in) in 1950; 117.3 mm (4.6 in) in 1967; 110.0 mm (4.3 in) in 1988.

Download the Data

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