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Valle Nacional Weather Records (MXN00020175)

Record envelope, standing records and threshold days for Valle Nacional (MXN00020175), Mexico, with 50 years of record.

Key Facts for Valle Nacional

  • Valle Nacional (MXN00020175) is a weather station in Mexico at 17.77 latitude and -96.32 longitude, 82 m (269 ft) above sea level.
  • The station reports from 1961 to 2010, 50 years of record.
  • 1,464 records set at Valle Nacional still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Valle Nacional set a daily record high maximum temperature of 33.9 C (93.0 F) on 31 December 2010.

About the Station

  • Location: Mexico, 17.77 latitude, -96.32 longitude.
  • Elevation: 82 m (269 ft).
  • Period of record: 1961 to 2010, 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 Valle Nacional, with 2026 drawn through them The band shows the record high and record low for each calendar day at Valle Nacional. 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 Valle Nacional. 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 Valle Nacional, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan36.7 C (98.1 F)3.9 C (39.0 F)n/an/a
Feb40.0 C (104.0 F)5.0 C (41.0 F)n/an/a
Mar42.8 C (109.0 F)6.1 C (43.0 F)n/an/a
Apr43.9 C (111.0 F)5.6 C (42.1 F)n/an/a
May43.9 C (111.0 F)6.7 C (44.1 F)n/an/a
Jun41.7 C (107.1 F)8.3 C (46.9 F)n/an/a
Jul43.9 C (111.0 F)13.3 C (55.9 F)n/an/a
Aug37.2 C (99.0 F)12.8 C (55.0 F)n/an/a
Sep38.9 C (102.0 F)10.6 C (51.1 F)n/an/a
Oct37.8 C (100.0 F)6.7 C (44.1 F)n/an/a
Nov37.2 C (99.0 F)2.8 C (37.0 F)n/an/a
Dec37.8 C (100.0 F)0.6 C (33.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Valle Nacional by the year they were set 1,464 records at Valle Nacional still stand. 2006 holds the most, with 167. 0501001502001961: 461962: 481963: 401964: 451965: 231966: 321967: 151968: 161969: 241970: 191971: 261972: 341973: 191974: 81975: 111976: 181977: 111978: 171979: 111980: 151981: 211982: 151983: 151984: 111985: 11991: 151992: 191993: 141995: 511996: 271997: 1082000: 342001: 762002: 422003: 792004: 552005: 862006: 1672007: 502008: 312009: 412010: 28196119661971197619811991199720042009
1,464 records at Valle Nacional still stand. 2006 holds the most, with 167.
Standing records at Valle Nacional by the year they were set
Year setStanding records
196146
196248
196340
196445
196523
196632
196715
196816
196924
197019
197126
197234
197319
19748
197511
197618
197711
197817
197911
198015
198121
198215
198315
198411
19851
199115
199219
199314
199551
199627
1997108
200034
200176
200242
200379
200455
200586
2006167
200750
200831
200941
201028

Wettest Day of Each Month

Jun: 367.8 mm (14.5 in)
Record daily precipitation for each month at Valle Nacional The wettest day on record for each calendar month at Valle Nacional. The most was 367.8 mm (14.5 in) on 20 June 1973. 0100200300400 Jan: 64.5 mm (2.5 in), 8 January 1991 Jan Feb: 68.6 mm (2.7 in), 26 February 1982 Feb Mar: 159.8 mm (6.3 in), 18 March 2001 Mar Apr: 95.0 mm (3.7 in), 19 April 2009 Apr May: 140.0 mm (5.5 in), 16 May 2009 May Jun: 367.8 mm (14.5 in), 20 June 1973 Jun Jul: 319.8 mm (12.6 in), 26 July 1961 Jul Aug: 344.9 mm (13.6 in), 22 August 2010 Aug Sep: 303.8 mm (12.0 in), 23 September 2009 Sep Oct: 214.9 mm (8.5 in), 2 October 1962 Oct Nov: 199.9 mm (7.9 in), 7 November 1961 Nov Dec: 93.0 mm (3.7 in), 19 December 1961 Dec
The wettest day on record for each calendar month at Valle Nacional. The most was 367.8 mm (14.5 in) on 20 June 1973.
Record daily precipitation for each month at Valle Nacional
MonthRecord daily precipitation (mm)Date
Jan64.5 mm (2.5 in)8 January 1991
Feb68.6 mm (2.7 in)26 February 1982
Mar159.8 mm (6.3 in)18 March 2001
Apr95.0 mm (3.7 in)19 April 2009
May140.0 mm (5.5 in)16 May 2009
Jun367.8 mm (14.5 in)20 June 1973
Jul319.8 mm (12.6 in)26 July 1961
Aug344.9 mm (13.6 in)22 August 2010
Sep303.8 mm (12.0 in)23 September 2009
Oct214.9 mm (8.5 in)2 October 1962
Nov199.9 mm (7.9 in)7 November 1961
Dec93.0 mm (3.7 in)19 December 1961

Period of Record Coverage

1961 to 2010
Days with data per year at Valle Nacional 42 years of record at Valle Nacional, 1961 to 2010. 8 years have data for under 90 percent of days and are left out of rankings: 1969, 1985, 1993, 2000, 2001, 2002, 2007, 2008. 1961: 362 of 365 days1962: 365 of 365 days1963: 363 of 365 days1964: 365 of 366 days1965: 365 of 365 days1966: 363 of 365 days1967: 364 of 365 days1968: 365 of 366 days1969: 271 of 365 days1970: 363 of 365 days1971: 364 of 365 days1972: 364 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 365 of 365 days1976: 365 of 366 days1977: 364 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 360 of 366 days1981: 364 of 365 days1982: 365 of 365 days1983: 364 of 365 days1984: 364 of 366 days1985: 28 of 365 days1991: 362 of 365 days1992: 364 of 366 days1993: 251 of 365 days1995: 362 of 365 days1996: 363 of 366 days1997: 362 of 365 days2000: 305 of 366 days2001: 303 of 365 days2002: 273 of 365 days2003: 365 of 365 days2004: 365 of 366 days2005: 365 of 365 days2006: 341 of 365 days2007: 174 of 365 days2008: 140 of 366 days2009: 362 of 365 days2010: 365 of 365 days1970198020002010
42 years of record at Valle Nacional, 1961 to 2010. 8 years have data for under 90 percent of days and are left out of rankings: 1969, 1985, 1993, 2000, 2001, 2002, 2007, 2008.
Days with data per year at Valle Nacional
YearDays with dataShare of yearComplete
196136299%Yes
1962365100%Yes
196336399%Yes
1964365100%Yes
1965365100%Yes
196636399%Yes
1967364100%Yes
1968365100%Yes
196927174%No
197036399%Yes
1971364100%Yes
197236499%Yes
1973365100%Yes
1974365100%Yes
1975365100%Yes
1976365100%Yes
1977364100%Yes
1978365100%Yes
1979365100%Yes
198036098%Yes
1981364100%Yes
1982365100%Yes
1983364100%Yes
198436499%Yes
1985288%No
199136299%Yes
199236499%Yes
199325169%No
199536299%Yes
199636399%Yes
199736299%Yes
200030583%No
200130383%No
200227375%No
2003365100%Yes
2004365100%Yes
2005365100%Yes
200634193%Yes
200717448%No
200814038%No
200936299%Yes
2010365100%Yes

Latest Records

20
Latest records at Valle Nacional
DateStationRecordValueBeat old record byOld record stoodSignificance
31 December 2010Valle Nacional, MXdaily high max33.9 C (93.0 F)2.2 C (4.0 F)36 years21 of 100 (Routine)
30 December 2010Valle Nacional, MXdaily high max31.7 C (89.1 F)1.1 C (2.0 F)40 years19 of 100 (Routine)
15 November 2010Valle Nacional, MXdaily high max (Tie)33.9 C (93.0 F)tie8 years1 of 100 (Routine)
1 November 2010Valle Nacional, MXdaily high max35.0 C (95.0 F)2.2 C (4.0 F)32 years19 of 100 (Routine)
29 October 2010Valle Nacional, MXdaily rain31.8 mm (1.3 in)4.4 mm (0.17 in)32 years15 of 100 (Routine)
26 October 2010Valle Nacional, MXmonthly high max37.8 C (100.0 F)1.1 C (2.0 F)1 year18 of 100 (Routine)
25 October 2010Valle Nacional, MXdaily high max (Tie)33.9 C (93.0 F)tie35 years3 of 100 (Routine)
7 October 2010Valle Nacional, MXdaily low max (Tie)20.6 C (69.1 F)tie4 years1 of 100 (Routine)
6 October 2010Valle Nacional, MXdaily low max (Tie)20.6 C (69.1 F)tie4 years1 of 100 (Routine)
27 September 2010Valle Nacional, MXdaily low max (Tie)22.8 C (73.0 F)tie4 years1 of 100 (Routine)
26 September 2010Valle Nacional, MXdaily rain163.8 mm (6.4 in)32.0 mm (1.3 in)0 years14 of 100 (Routine)
25 September 2010Valle Nacional, MXdaily high min (Tie)22.8 C (73.0 F)tie45 years4 of 100 (Routine)
24 September 2010Valle Nacional, MXdaily high min (Tie)22.8 C (73.0 F)tie48 years4 of 100 (Routine)
21 September 2010Valle Nacional, MXdaily high max35.6 C (96.1 F)0.6 C (1.1 F)43 years18 of 100 (Routine)
20 September 2010Valle Nacional, MXdaily high max35.6 C (96.1 F)0.6 C (1.1 F)43 years18 of 100 (Routine)
19 September 2010Valle Nacional, MXdaily high max (Tie)35.6 C (96.1 F)tie8 years1 of 100 (Routine)
10 September 2010Valle Nacional, MXdaily high min (Tie)22.8 C (73.0 F)tie48 years4 of 100 (Routine)
7 September 2010Valle Nacional, MXdaily high min (Tie)22.8 C (73.0 F)tie48 years4 of 100 (Routine)
31 August 2010Valle Nacional, MXdaily rain115.8 mm (4.6 in)41.9 mm (1.6 in)0 years16 of 100 (Routine)
31 August 2010Valle Nacional, MXdaily high min (Tie)22.8 C (73.0 F)tie48 years4 of 100 (Routine)

Climate Trend

30 complete years, 1961 to 2010
Annual mean temperature at Valle Nacional as warming stripes, 1961 to 2010 One stripe for each of 30 complete years at Valle Nacional, 1961 to 2010. Blue stripes are years cooler than the station's own mean of 24.7 C (76.4 F); red stripes are warmer. The coolest year was 1997, at 21.1 C (70.0 F), and the warmest was 1995, at 25.8 C (78.5 F). The strongest colour marks a difference of 3.6 C (6.5 F). 1961: 25.0 C, +0.3 C from the station mean1962: 25.2 C, +0.5 C from the station mean1963: 25.1 C, +0.4 C from the station mean1964: 25.1 C, +0.4 C from the station mean1965: 25.0 C, +0.4 C from the station mean1966: 24.6 C, -0.1 C from the station mean1967: 24.5 C, -0.2 C from the station mean1968: 24.3 C, -0.4 C from the station mean1970: 24.5 C, -0.1 C from the station mean1971: 25.1 C, +0.4 C from the station mean1972: 24.7 C, 0.0 C from the station mean1973: 24.5 C, -0.1 C from the station mean1974: 24.8 C, +0.1 C from the station mean1975: 24.7 C, 0.0 C from the station mean1976: 24.1 C, -0.5 C from the station mean1977: 24.5 C, -0.1 C from the station mean1978: 24.3 C, -0.3 C from the station mean1979: 24.4 C, -0.3 C from the station mean1980: 24.8 C, +0.1 C from the station mean1981: 24.8 C, +0.1 C from the station mean1982: 25.0 C, +0.4 C from the station mean1983: 24.8 C, +0.1 C from the station mean1984: 24.1 C, -0.6 C from the station mean1991: 25.0 C, +0.3 C from the station mean1992: 24.5 C, -0.1 C from the station mean1995: 25.8 C, +1.2 C from the station mean1996: 24.9 C, +0.2 C from the station mean1997: 21.1 C, -3.5 C from the station mean2009: 25.8 C, +1.1 C from the station mean2010: 24.8 C, +0.1 C from the station mean19611965197019751980198519901995200020052010
One stripe for each of 30 complete years at Valle Nacional, 1961 to 2010. Blue stripes are years cooler than the station's own mean of 24.7 C (76.4 F); red stripes are warmer. The coolest year was 1997, at 21.1 C (70.0 F), and the warmest was 1995, at 25.8 C (78.5 F). The strongest colour marks a difference of 3.6 C (6.5 F).
Annual mean temperature at Valle Nacional as warming stripes, 1961 to 2010
YearAnnual mean temperatureDifference from the station mean
196125.0 C+0.30 C
196225.2 C+0.50 C
196325.1 C+0.42 C
196425.1 C+0.41 C
196525.0 C+0.36 C
196624.6 C-0.07 C
196724.5 C-0.15 C
196824.3 C-0.35 C
197024.5 C-0.12 C
197125.1 C+0.44 C
197224.7 C+0.02 C
197324.5 C-0.11 C
197424.8 C+0.14 C
197524.7 C+0.05 C
197624.1 C-0.53 C
197724.5 C-0.13 C
197824.3 C-0.34 C
197924.4 C-0.25 C
198024.8 C+0.10 C
198124.8 C+0.13 C
198225.0 C+0.37 C
198324.8 C+0.13 C
198424.1 C-0.57 C
199125.0 C+0.35 C
199224.5 C-0.13 C
199525.8 C+1.16 C
199624.9 C+0.25 C
199721.1 C-3.52 C
200925.8 C+1.10 C
201024.8 C+0.14 C

The fitted trend in annual mean temperature here over 1961 to 2010 is -0.1 C (-0.3 to 0.2) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.5 to 0.3) per decade. The slope is a straight line fitted to 30 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Valle Nacional
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.1 C (-0.3 to 0.2) per decade-0.1 F (-0.5 to 0.3) per decade1961 to 201030Not clearly different from zero
Mean daily maximum-0.1 C (-0.4 to 0.2) per decade-0.2 F (-0.7 to 0.4) per decade1961 to 201030Not clearly different from zero
Mean daily minimum-0.01 C (-0.20 to 0.18) per decade-0.02 F (-0.36 to 0.32) per decade1961 to 201030Not 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

1961 to 2010
Yearly extremes at Valle Nacional: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)43.9 C (111.0 F)196440.0 C (104.0 F)42
Coldest night (TNn)0.6 C (33.1 F)199710.0 C (50.0 F)42
Wettest day (Rx1day)367.8 mm (14.5 in)1973163.8 mm (6.4 in)42
Wettest five days (Rx5day)809.8 mm (31.9 in)2010358.0 mm (14.1 in)42
Longest dry spell (CDD)79 days200523 days42

Hottest day (TXx)

Hottest day (TXx) at Valle Nacional by year The hottest day of the year at Valle Nacional, 1961 to 2010. The record is 43.9 C (111.0 F) in 1964, marked on the chart; the median year is 40.0 C (104.0 F). 253035404519701980199020002010Record: 43.9 C (111.0 F) in 1964
The hottest day of the year at Valle Nacional, 1961 to 2010. The record is 43.9 C (111.0 F) in 1964, marked on the chart; the median year is 40.0 C (104.0 F).
Hottest day (TXx) at Valle Nacional by year
YearHottest day (TXx)
196140.6 C (105.1 F)
196241.7 C (107.1 F)
196341.7 C (107.1 F)
196443.9 C (111.0 F)
196541.7 C (107.1 F)
196640.0 C (104.0 F)
196740.0 C (104.0 F)
196839.4 C (102.9 F)
196940.6 C (105.1 F)
197040.6 C (105.1 F)
197141.1 C (106.0 F)
197240.0 C (104.0 F)
197340.6 C (105.1 F)
197438.9 C (102.0 F)
197537.8 C (100.0 F)
197638.3 C (100.9 F)
197740.6 C (105.1 F)
197841.7 C (107.1 F)
197940.6 C (105.1 F)
198042.8 C (109.0 F)
198140.0 C (104.0 F)
198239.4 C (102.9 F)
198340.6 C (105.1 F)
198440.0 C (104.0 F)
198533.3 C (91.9 F)
199140.6 C (105.1 F)
199236.7 C (98.1 F)
199333.3 C (91.9 F)
199542.8 C (109.0 F)
199640.0 C (104.0 F)
199735.0 C (95.0 F)
200035.6 C (96.1 F)
200138.3 C (100.9 F)
200240.0 C (104.0 F)
200339.4 C (102.9 F)
200436.7 C (98.1 F)
200536.7 C (98.1 F)
200628.9 C (84.0 F)
200725.6 C (78.1 F)
200843.9 C (111.0 F)
200942.8 C (109.0 F)
201043.9 C (111.0 F)

Coldest night (TNn)

Coldest night (TNn) at Valle Nacional by year The coldest night of the year at Valle Nacional, 1961 to 2010. The record is 0.6 C (33.1 F) in 1997, marked on the chart; the median year is 10.0 C (50.0 F). 05101519701980199020002010Record: 0.6 C (33.1 F) in 1997
The coldest night of the year at Valle Nacional, 1961 to 2010. The record is 0.6 C (33.1 F) in 1997, marked on the chart; the median year is 10.0 C (50.0 F).
Coldest night (TNn) at Valle Nacional by year
YearColdest night (TNn)
19618.9 C (48.0 F)
196210.0 C (50.0 F)
19637.8 C (46.0 F)
196411.7 C (53.1 F)
196510.6 C (51.1 F)
19668.9 C (48.0 F)
196710.0 C (50.0 F)
19688.9 C (48.0 F)
196911.7 C (53.1 F)
19708.9 C (48.0 F)
197110.6 C (51.1 F)
197211.7 C (53.1 F)
19737.8 C (46.0 F)
197410.0 C (50.0 F)
197510.6 C (51.1 F)
19768.9 C (48.0 F)
19778.9 C (48.0 F)
197810.0 C (50.0 F)
197910.0 C (50.0 F)
198010.6 C (51.1 F)
198110.6 C (51.1 F)
198210.0 C (50.0 F)
19838.9 C (48.0 F)
19848.3 C (46.9 F)
198512.8 C (55.0 F)
199110.0 C (50.0 F)
199211.7 C (53.1 F)
199310.0 C (50.0 F)
199512.8 C (55.0 F)
19967.8 C (46.0 F)
19970.6 C (33.1 F)
20005.6 C (42.1 F)
20015.6 C (42.1 F)
20026.1 C (43.0 F)
20035.6 C (42.1 F)
20042.8 C (37.0 F)
20052.8 C (37.0 F)
20065.0 C (41.0 F)
20076.7 C (44.1 F)
200812.8 C (55.0 F)
200910.0 C (50.0 F)
201010.0 C (50.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Valle Nacional by year The wettest day of the year at Valle Nacional, 1961 to 2010. The record is 367.8 mm (14.5 in) in 1973, marked on the chart; the median year is 163.8 mm (6.4 in). 010020030040019701980199020002010Record: 367.8 mm (14.5 in) in 1973
The wettest day of the year at Valle Nacional, 1961 to 2010. The record is 367.8 mm (14.5 in) in 1973, marked on the chart; the median year is 163.8 mm (6.4 in).
Wettest day (Rx1day) at Valle Nacional by year
YearWettest day (Rx1day)
1961319.8 mm (12.6 in)
1962214.9 mm (8.5 in)
1963164.8 mm (6.5 in)
1964133.9 mm (5.3 in)
1965208.8 mm (8.2 in)
1966119.9 mm (4.7 in)
1967176.3 mm (6.9 in)
1968194.8 mm (7.7 in)
1969248.9 mm (9.8 in)
1970152.9 mm (6.0 in)
1971157.0 mm (6.2 in)
197291.9 mm (3.6 in)
1973367.8 mm (14.5 in)
1974179.8 mm (7.1 in)
197578.0 mm (3.1 in)
1976170.9 mm (6.7 in)
1977114.3 mm (4.5 in)
1978179.8 mm (7.1 in)
1979162.8 mm (6.4 in)
1980131.8 mm (5.2 in)
1981185.7 mm (7.3 in)
1982119.9 mm (4.7 in)
1983220.7 mm (8.7 in)
1984268.2 mm (10.6 in)
198520.8 mm (0.8 in)
1991300.5 mm (11.8 in)
1992222.3 mm (8.8 in)
1993263.1 mm (10.4 in)
1995183.1 mm (7.2 in)
1996280.4 mm (11.0 in)
199795.3 mm (3.8 in)
2000116.6 mm (4.6 in)
2001159.8 mm (6.3 in)
2002110.0 mm (4.3 in)
200375.2 mm (3.0 in)
200443.4 mm (1.7 in)
200525.7 mm (1.0 in)
200617.3 mm (0.7 in)
20078.4 mm (0.33 in)
2008109.7 mm (4.3 in)
2009303.8 mm (12.0 in)
2010344.9 mm (13.6 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Valle Nacional by year The wettest five days of the year at Valle Nacional, 1961 to 2010. The record is 809.8 mm (31.9 in) in 2010, marked on the chart; the median year is 358.0 mm (14.1 in). 02004006008001,00019701980199020002010Record: 809.8 mm (31.9 in) in 2010
The wettest five days of the year at Valle Nacional, 1961 to 2010. The record is 809.8 mm (31.9 in) in 2010, marked on the chart; the median year is 358.0 mm (14.1 in).
Wettest five days (Rx5day) at Valle Nacional by year
YearWettest five days (Rx5day)
1961549.5 mm (21.6 in)
1962330.5 mm (13.0 in)
1963309.4 mm (12.2 in)
1964418.4 mm (16.5 in)
1965353.4 mm (13.9 in)
1966362.6 mm (14.3 in)
1967328.8 mm (12.9 in)
1968439.9 mm (17.3 in)
1969730.0 mm (28.7 in)
1970290.8 mm (11.4 in)
1971266.0 mm (10.5 in)
1972219.3 mm (8.6 in)
1973581.4 mm (22.9 in)
1974399.4 mm (15.7 in)
1975180.3 mm (7.1 in)
1976478.7 mm (18.8 in)
1977272.9 mm (10.7 in)
1978396.5 mm (15.6 in)
1979322.4 mm (12.7 in)
1980279.1 mm (11.0 in)
1981418.3 mm (16.5 in)
1982280.5 mm (11.0 in)
1983589.3 mm (23.2 in)
1984407.9 mm (16.1 in)
198529.7 mm (1.2 in)
1991679.8 mm (26.8 in)
1992436.1 mm (17.2 in)
1993366.8 mm (14.4 in)
1995397.5 mm (15.6 in)
1996445.7 mm (17.5 in)
1997256.8 mm (10.1 in)
2000504.2 mm (19.9 in)
2001418.4 mm (16.5 in)
2002216.7 mm (8.5 in)
2003173.5 mm (6.8 in)
2004140.1 mm (5.5 in)
200563.2 mm (2.5 in)
200636.9 mm (1.5 in)
200713.3 mm (0.5 in)
2008238.8 mm (9.4 in)
2009586.7 mm (23.1 in)
2010809.8 mm (31.9 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Valle Nacional by year The longest dry spell of the year at Valle Nacional, 1961 to 2010. The record is 79 days in 2005, marked on the chart; the median year is 23 days. 02040608019701980199020002010Record: 79 days in 2005
The longest dry spell of the year at Valle Nacional, 1961 to 2010. The record is 79 days in 2005, marked on the chart; the median year is 23 days.
Longest dry spell (CDD) at Valle Nacional by year
YearLongest dry spell (CDD)
196129 days
196225 days
196321 days
196424 days
196520 days
196613 days
196717 days
196813 days
196929 days
197020 days
197133 days
197225 days
197320 days
197419 days
197576 days
197622 days
197725 days
197850 days
197911 days
198015 days
198117 days
198234 days
198336 days
198420 days
19856 days
199116 days
199217 days
199320 days
199517 days
199634 days
199713 days
200023 days
200143 days
200262 days
200342 days
200433 days
200579 days
200666 days
200742 days
200818 days
200936 days
201023 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

35 years, 1961 to 2010

A day with at least 169.1 mm (6.7 in) of rain is expected about once in 2 years. A day with at least 407.5 mm (16.0 in) of rain is expected about once in 100 years.

Rainfall return levels at Valle Nacional: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years169.1 mm (6.7 in)
5 years248.6 mm (9.8 in)
10 years294.2 mm (11.6 in)
25 years344.9 mm (13.6 in)
50 years378.0 mm (14.9 in)Longer than the 35 years of record
100 years407.5 mm (16.0 in)Longer than the 35 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, 35 years of values from 1961 to 2010.

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: 367.8 mm (14.5 in) in 1973; 344.9 mm (13.6 in) in 2010; 319.8 mm (12.6 in) in 1961.

Download the Data

  • Data for Valle Nacional standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Valle Nacional 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

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