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Built 2026-10-19 (19 October 2026)

Vallecillo (Smn) Weather Records (MXN00019077)

Record envelope, standing records and threshold days for Vallecillo (Smn) (MXN00019077), Mexico, with 48 years of record.

Key Facts for Vallecillo (Smn)

  • Vallecillo (Smn) (MXN00019077) is a weather station in Mexico at 26.65 latitude and -99.98 longitude, 805 m (2,641 ft) above sea level.
  • The station reports from 1941 to 1988, 48 years of record.
  • 1,464 records set at Vallecillo (Smn) still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Vallecillo (Smn) tied a daily record high minimum temperature of 25.0 C (77.0 F) on 20 July 1988.

About the Station

  • Location: Mexico, 26.65 latitude, -99.98 longitude.
  • Elevation: 805 m (2,641 ft).
  • Period of record: 1941 to 1988, 48 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 Vallecillo (Smn), with 2026 drawn through them The band shows the record high and record low for each calendar day at Vallecillo (Smn). The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Vallecillo (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 Vallecillo (Smn), with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan37.8 C (100.0 F)-11.7 C (10.9 F)n/an/a
Feb40.0 C (104.0 F)-1.1 C (30.0 F)n/an/a
Mar40.6 C (105.1 F)0.0 C (32.0 F)n/an/a
Apr45.0 C (113.0 F)3.9 C (39.0 F)n/an/a
May43.9 C (111.0 F)8.9 C (48.0 F)n/an/a
Jun44.4 C (111.9 F)13.9 C (57.0 F)n/an/a
Jul45.6 C (114.1 F)15.6 C (60.1 F)n/an/a
Aug45.6 C (114.1 F)17.8 C (64.0 F)n/an/a
Sep43.3 C (109.9 F)10.0 C (50.0 F)n/an/a
Oct38.9 C (102.0 F)0.6 C (33.1 F)n/an/a
Nov38.9 C (102.0 F)-2.2 C (28.0 F)n/an/a
Dec35.0 C (95.0 F)-2.2 C (28.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Vallecillo (Smn) by the year they were set 1,464 records at Vallecillo (Smn) still stand. 1943 holds the most, with 87. 02550751001941: 11942: 731943: 871944: 681945: 561956: 511957: 571958: 131959: 451960: 431961: 311962: 471963: 651964: 361965: 401966: 371967: 481968: 181969: 411970: 491971: 481972: 261973: 541974: 551975: 511976: 351977: 231978: 131979: 381980: 201981: 331982: 161983: 461984: 191985: 261986: 201987: 231988: 121941194519591963196719711975197919831987
1,464 records at Vallecillo (Smn) still stand. 1943 holds the most, with 87.
Standing records at Vallecillo (Smn) by the year they were set
Year setStanding records
19411
194273
194387
194468
194556
195651
195757
195813
195945
196043
196131
196247
196365
196436
196540
196637
196748
196818
196941
197049
197148
197226
197354
197455
197551
197635
197723
197813
197938
198020
198133
198216
198346
198419
198526
198620
198723
198812

Wettest Day of Each Month

Apr: 179.8 mm (7.1 in)
Record daily precipitation for each month at Vallecillo (Smn) The wettest day on record for each calendar month at Vallecillo (Smn). The most was 179.8 mm (7.1 in) on 28 April 1957. 050100150200 Jan: 19.8 mm (0.8 in), 4 January 1970 Jan Feb: 63.0 mm (2.5 in), 19 February 1957 Feb Mar: 19.8 mm (0.8 in), 27 March 1953 Mar Apr: 179.8 mm (7.1 in), 28 April 1957 Apr May: 149.9 mm (5.9 in), 24 May 1975 May Jun: 72.4 mm (2.9 in), 28 June 1971 Jun Jul: 83.8 mm (3.3 in), 4 July 1942 Jul Aug: 59.9 mm (2.4 in), 22 August 1944 Aug Sep: 149.9 mm (5.9 in), 25 September 1965 Sep Oct: 56.9 mm (2.2 in), 4 October 1942 Oct Nov: 59.9 mm (2.4 in), 16 November 1976 Nov Dec: 25.4 mm (1.0 in), 1 December 1982 Dec
The wettest day on record for each calendar month at Vallecillo (Smn). The most was 179.8 mm (7.1 in) on 28 April 1957.
Record daily precipitation for each month at Vallecillo (Smn)
MonthRecord daily precipitation (mm)Date
Jan19.8 mm (0.8 in)4 January 1970
Feb63.0 mm (2.5 in)19 February 1957
Mar19.8 mm (0.8 in)27 March 1953
Apr179.8 mm (7.1 in)28 April 1957
May149.9 mm (5.9 in)24 May 1975
Jun72.4 mm (2.9 in)28 June 1971
Jul83.8 mm (3.3 in)4 July 1942
Aug59.9 mm (2.4 in)22 August 1944
Sep149.9 mm (5.9 in)25 September 1965
Oct56.9 mm (2.2 in)4 October 1942
Nov59.9 mm (2.4 in)16 November 1976
Dec25.4 mm (1.0 in)1 December 1982

Period of Record Coverage

1941 to 1988
Days with data per year at Vallecillo (Smn) 38 years of record at Vallecillo (Smn), 1941 to 1988. 11 years have data for under 90 percent of days and are left out of rankings: 1941, 1945, 1956, 1957, 1958, 1978, 1982, 1983 and others. 1941: 15 of 365 days1942: 359 of 365 days1943: 360 of 365 days1944: 365 of 366 days1945: 211 of 365 days1956: 245 of 366 days1957: 172 of 365 days1958: 98 of 365 days1959: 360 of 365 days1960: 362 of 366 days1961: 365 of 365 days1962: 360 of 365 days1963: 364 of 365 days1964: 334 of 366 days1965: 362 of 365 days1966: 358 of 365 days1967: 363 of 365 days1968: 364 of 366 days1969: 330 of 365 days1970: 363 of 365 days1971: 364 of 365 days1972: 361 of 366 days1973: 365 of 365 days1974: 360 of 365 days1975: 365 of 365 days1976: 362 of 366 days1977: 365 of 365 days1978: 90 of 365 days1979: 363 of 365 days1980: 340 of 366 days1981: 330 of 365 days1982: 151 of 365 days1983: 305 of 365 days1984: 184 of 366 days1985: 268 of 365 days1986: 361 of 365 days1987: 362 of 365 days1988: 177 of 366 days1945196019651970197519801985
38 years of record at Vallecillo (Smn), 1941 to 1988. 11 years have data for under 90 percent of days and are left out of rankings: 1941, 1945, 1956, 1957, 1958, 1978, 1982, 1983 and others.
Days with data per year at Vallecillo (Smn)
YearDays with dataShare of yearComplete
1941154%No
194235998%Yes
194336099%Yes
1944365100%Yes
194521158%No
195624567%No
195717247%No
19589827%No
195936099%Yes
196036299%Yes
1961365100%Yes
196236099%Yes
1963364100%Yes
196433491%Yes
196536299%Yes
196635898%Yes
196736399%Yes
196836499%Yes
196933090%Yes
197036399%Yes
1971364100%Yes
197236199%Yes
1973365100%Yes
197436099%Yes
1975365100%Yes
197636299%Yes
1977365100%Yes
19789025%No
197936399%Yes
198034093%Yes
198133090%Yes
198215141%No
198330584%No
198418450%No
198526873%No
198636199%Yes
198736299%Yes
198817748%No

Latest Records

20
Latest records at Vallecillo (Smn)
DateStationRecordValueBeat old record byOld record stoodSignificance
20 July 1988Vallecillo (Smn), MXdaily high min (Tie)25.0 C (77.0 F)tie44 years4 of 100 (Routine)
19 July 1988Vallecillo (Smn), MXdaily high min (Tie)23.9 C (75.0 F)tie44 years4 of 100 (Routine)
3 July 1988Vallecillo (Smn), MXdaily high min (Tie)25.0 C (77.0 F)tie43 years4 of 100 (Routine)
25 April 1988Vallecillo (Smn), MXdaily high min23.3 C (73.9 F)0.5 C (0.9 F)21 years11 of 100 (Routine)
11 April 1988Vallecillo (Smn), MXdaily low min (Tie)6.7 C (44.1 F)tie15 years2 of 100 (Routine)
10 April 1988Vallecillo (Smn), MXdaily low max16.7 C (62.1 F)4.4 C (7.9 F)3 years13 of 100 (Routine)
5 April 1988Vallecillo (Smn), MXdaily high min (Tie)20.6 C (69.1 F)tie23 years2 of 100 (Routine)
19 March 1988Vallecillo (Smn), MXdaily low min0.6 C (33.1 F)2.2 C (4.0 F)23 years14 of 100 (Routine)
18 March 1988Vallecillo (Smn), MXdaily low max16.7 C (62.1 F)3.3 C (5.9 F)23 years16 of 100 (Routine)
15 March 1988Vallecillo (Smn), MXdaily low max12.8 C (55.0 F)5.0 C (9.0 F)29 years21 of 100 (Routine)
14 March 1988Vallecillo (Smn), MXdaily low max13.9 C (57.0 F)1.1 C (2.0 F)25 years13 of 100 (Routine)
11 March 1988Vallecillo (Smn), MXdaily high max (Tie)36.7 C (98.1 F)tie13 years1 of 100 (Routine)
2 March 1988Vallecillo (Smn), MXdaily high min (Tie)16.7 C (62.1 F)tie7 years1 of 100 (Routine)
13 February 1988Vallecillo (Smn), MXdaily low min (Tie)0.6 C (33.1 F)tie13 years2 of 100 (Routine)
12 February 1988Vallecillo (Smn), MXdaily low min (Tie)0.0 C (32.0 F)tie14 years2 of 100 (Routine)
11 February 1988Vallecillo (Smn), MXdaily low max (Tie)11.1 C (52.0 F)tie44 years4 of 100 (Routine)
7 February 1988Vallecillo (Smn), MXdaily low max8.9 C (48.0 F)1.1 C (2.0 F)2 years5 of 100 (Routine)
6 February 1988Vallecillo (Smn), MXdaily low min0.6 C (33.1 F)2.2 C (4.0 F)26 years16 of 100 (Routine)
6 February 1988Vallecillo (Smn), MXmonthly low max (Tie)3.9 C (39.0 F)tie21 years5 of 100 (Routine)
25 January 1988Vallecillo (Smn), MXdaily low max (Tie)11.7 C (53.1 F)tie21 years2 of 100 (Routine)

Climate Trend

23 complete years, 1942 to 1987
Annual mean temperature at Vallecillo (Smn) as warming stripes, 1942 to 1987 One stripe for each of 23 complete years at Vallecillo (Smn), 1942 to 1987. Blue stripes are years cooler than the station's own mean of 22.7 C (72.8 F); red stripes are warmer. The coolest year was 1976, at 21.6 C (70.9 F), and the warmest was 1962, at 24.0 C (75.3 F). The strongest colour marks a difference of 1.4 C (2.5 F). 1942: 21.7 C, -1.0 C from the station mean1943: 22.3 C, -0.3 C from the station mean1944: 23.5 C, +0.9 C from the station mean1959: 22.2 C, -0.5 C from the station mean1960: 22.6 C, 0.0 C from the station mean1961: 22.7 C, +0.1 C from the station mean1962: 24.0 C, +1.4 C from the station mean1963: 23.2 C, +0.5 C from the station mean1965: 23.4 C, +0.8 C from the station mean1966: 21.9 C, -0.8 C from the station mean1967: 23.0 C, +0.4 C from the station mean1968: 22.0 C, -0.7 C from the station mean1970: 22.7 C, 0.0 C from the station mean1971: 23.2 C, +0.5 C from the station mean1972: 22.9 C, +0.2 C from the station mean1973: 23.0 C, +0.3 C from the station mean1974: 23.0 C, +0.3 C from the station mean1975: 22.7 C, 0.0 C from the station mean1976: 21.6 C, -1.1 C from the station mean1977: 22.9 C, +0.2 C from the station mean1979: 22.4 C, -0.3 C from the station mean1986: 22.5 C, -0.1 C from the station mean1987: 21.8 C, -0.9 C from the station mean1942194519501955196019651970197519801985
One stripe for each of 23 complete years at Vallecillo (Smn), 1942 to 1987. Blue stripes are years cooler than the station's own mean of 22.7 C (72.8 F); red stripes are warmer. The coolest year was 1976, at 21.6 C (70.9 F), and the warmest was 1962, at 24.0 C (75.3 F). The strongest colour marks a difference of 1.4 C (2.5 F).
Annual mean temperature at Vallecillo (Smn) as warming stripes, 1942 to 1987
YearAnnual mean temperatureDifference from the station mean
194221.7 C-0.99 C
194322.3 C-0.33 C
194423.5 C+0.85 C
195922.2 C-0.49 C
196022.6 C-0.05 C
196122.7 C+0.06 C
196224.0 C+1.38 C
196323.2 C+0.52 C
196523.4 C+0.78 C
196621.9 C-0.80 C
196723.0 C+0.38 C
196822.0 C-0.68 C
197022.7 C+0.01 C
197123.2 C+0.53 C
197222.9 C+0.19 C
197323.0 C+0.34 C
197423.0 C+0.31 C
197522.7 C+0.04 C
197621.6 C-1.06 C
197722.9 C+0.24 C
197922.4 C-0.30 C
198622.5 C-0.13 C
198721.8 C-0.89 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

1941 to 1988
Yearly extremes at Vallecillo (Smn): the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)45.6 C (114.1 F)194341.7 C (107.1 F)38
Coldest night (TNn)-11.7 C (10.9 F)19620.0 C (32.0 F)38
Wettest day (Rx1day)179.8 mm (7.1 in)195737.3 mm (1.5 in)48
Wettest five days (Rx5day)314.4 mm (12.4 in)196760.0 mm (2.4 in)48
Longest dry spell (CDD)256 days197784 days48

Hottest day (TXx)

Hottest day (TXx) at Vallecillo (Smn) by year The hottest day of the year at Vallecillo (Smn), 1941 to 1988. The record is 45.6 C (114.1 F) in 1943, marked on the chart; the median year is 41.7 C (107.1 F). 2530354045501950196019701980Record: 45.6 C (114.1 F) in 1943
The hottest day of the year at Vallecillo (Smn), 1941 to 1988. The record is 45.6 C (114.1 F) in 1943, marked on the chart; the median year is 41.7 C (107.1 F).
Hottest day (TXx) at Vallecillo (Smn) by year
YearHottest day (TXx)
194129.4 C (84.9 F)
194240.6 C (105.1 F)
194345.6 C (114.1 F)
194445.6 C (114.1 F)
194544.4 C (111.9 F)
1946n/a
1947n/a
1948n/a
1949n/a
1950n/a
1951n/a
1952n/a
1953n/a
1954n/a
1955n/a
195639.4 C (102.9 F)
195736.1 C (97.0 F)
195833.9 C (93.0 F)
195940.6 C (105.1 F)
196042.8 C (109.0 F)
196140.0 C (104.0 F)
196243.3 C (109.9 F)
196342.8 C (109.0 F)
196441.7 C (107.1 F)
196541.7 C (107.1 F)
196640.6 C (105.1 F)
196742.8 C (109.0 F)
196840.6 C (105.1 F)
196943.9 C (111.0 F)
197042.8 C (109.0 F)
197143.9 C (111.0 F)
197241.7 C (107.1 F)
197343.9 C (111.0 F)
197441.7 C (107.1 F)
197545.0 C (113.0 F)
197640.0 C (104.0 F)
197743.9 C (111.0 F)
197835.0 C (95.0 F)
197942.8 C (109.0 F)
198040.6 C (105.1 F)
198138.9 C (102.0 F)
198240.6 C (105.1 F)
198341.1 C (106.0 F)
198441.7 C (107.1 F)
198540.0 C (104.0 F)
198643.3 C (109.9 F)
198740.6 C (105.1 F)
198839.4 C (102.9 F)

Coldest night (TNn)

Coldest night (TNn) at Vallecillo (Smn) by year The coldest night of the year at Vallecillo (Smn), 1941 to 1988. The record is -11.7 C (10.9 F) in 1962, marked on the chart; the median year is 0.0 C (32.0 F). -15-10-5051950196019701980Record: -11.7 C (10.9 F) in 1962
The coldest night of the year at Vallecillo (Smn), 1941 to 1988. The record is -11.7 C (10.9 F) in 1962, marked on the chart; the median year is 0.0 C (32.0 F).
Coldest night (TNn) at Vallecillo (Smn) by year
YearColdest night (TNn)
19414.4 C (39.9 F)
19420.0 C (32.0 F)
19430.0 C (32.0 F)
19441.1 C (34.0 F)
19455.0 C (41.0 F)
1946n/a
1947n/a
1948n/a
1949n/a
1950n/a
1951n/a
1952n/a
1953n/a
1954n/a
1955n/a
19561.1 C (34.0 F)
19573.9 C (39.0 F)
19581.7 C (35.1 F)
19590.0 C (32.0 F)
19600.0 C (32.0 F)
19610.0 C (32.0 F)
1962-11.7 C (10.9 F)
1963-0.6 C (30.9 F)
19640.0 C (32.0 F)
19650.0 C (32.0 F)
19660.0 C (32.0 F)
19670.0 C (32.0 F)
19680.0 C (32.0 F)
19690.0 C (32.0 F)
19700.0 C (32.0 F)
19710.0 C (32.0 F)
19720.0 C (32.0 F)
1973-0.6 C (30.9 F)
1974-1.1 C (30.0 F)
1975-6.1 C (21.0 F)
1976-2.2 C (28.0 F)
1977-3.3 C (26.1 F)
1978-2.2 C (28.0 F)
1979-5.0 C (23.0 F)
19800.0 C (32.0 F)
19810.0 C (32.0 F)
19820.6 C (33.1 F)
19830.0 C (32.0 F)
1984-4.4 C (24.1 F)
1985-6.1 C (21.0 F)
19860.0 C (32.0 F)
1987-0.6 C (30.9 F)
19880.0 C (32.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Vallecillo (Smn) by year The wettest day of the year at Vallecillo (Smn), 1941 to 1988. The record is 179.8 mm (7.1 in) in 1957, marked on the chart; the median year is 37.3 mm (1.5 in). 0501001502001950196019701980Record: 179.8 mm (7.1 in) in 1957
The wettest day of the year at Vallecillo (Smn), 1941 to 1988. The record is 179.8 mm (7.1 in) in 1957, marked on the chart; the median year is 37.3 mm (1.5 in).
Wettest day (Rx1day) at Vallecillo (Smn) by year
YearWettest day (Rx1day)
19410.0 mm (0.00 in)
194283.8 mm (3.3 in)
194330.0 mm (1.2 in)
194459.9 mm (2.4 in)
194559.9 mm (2.4 in)
194627.9 mm (1.1 in)
194729.0 mm (1.1 in)
194824.9 mm (1.0 in)
194934.8 mm (1.4 in)
195019.8 mm (0.8 in)
195127.9 mm (1.1 in)
195224.9 mm (1.0 in)
195319.8 mm (0.8 in)
195424.9 mm (1.0 in)
195564.8 mm (2.6 in)
19569.9 mm (0.39 in)
1957179.8 mm (7.1 in)
195839.9 mm (1.6 in)
195929.5 mm (1.2 in)
196015.0 mm (0.6 in)
196115.0 mm (0.6 in)
196217.8 mm (0.7 in)
196319.8 mm (0.8 in)
196419.8 mm (0.8 in)
1965149.9 mm (5.9 in)
196649.8 mm (2.0 in)
196789.9 mm (3.5 in)
196832.8 mm (1.3 in)
196939.9 mm (1.6 in)
197071.9 mm (2.8 in)
1971129.8 mm (5.1 in)
197243.4 mm (1.7 in)
197354.4 mm (2.1 in)
197439.9 mm (1.6 in)
1975149.9 mm (5.9 in)
197659.9 mm (2.4 in)
197750.0 mm (2.0 in)
197859.9 mm (2.4 in)
19794.3 mm (0.17 in)
198070.1 mm (2.8 in)
198170.4 mm (2.8 in)
198225.4 mm (1.0 in)
198340.4 mm (1.6 in)
198470.1 mm (2.8 in)
198560.2 mm (2.4 in)
198627.2 mm (1.1 in)
198730.5 mm (1.2 in)
19880.0 mm (0.00 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Vallecillo (Smn) by year The wettest five days of the year at Vallecillo (Smn), 1941 to 1988. The record is 314.4 mm (12.4 in) in 1967, marked on the chart; the median year is 60.0 mm (2.4 in). 01002003004001950196019701980Record: 314.4 mm (12.4 in) in 1967
The wettest five days of the year at Vallecillo (Smn), 1941 to 1988. The record is 314.4 mm (12.4 in) in 1967, marked on the chart; the median year is 60.0 mm (2.4 in).
Wettest five days (Rx5day) at Vallecillo (Smn) by year
YearWettest five days (Rx5day)
19410.0 mm (0.00 in)
1942137.4 mm (5.4 in)
194350.3 mm (2.0 in)
1944169.7 mm (6.7 in)
194559.9 mm (2.4 in)
194647.7 mm (1.9 in)
194759.4 mm (2.3 in)
194849.8 mm (2.0 in)
194964.8 mm (2.6 in)
195029.7 mm (1.2 in)
195144.7 mm (1.8 in)
195244.7 mm (1.8 in)
195372.4 mm (2.9 in)
195424.9 mm (1.0 in)
195576.4 mm (3.0 in)
195616.5 mm (0.6 in)
1957179.8 mm (7.1 in)
1958149.4 mm (5.9 in)
195929.5 mm (1.2 in)
196046.7 mm (1.8 in)
196131.7 mm (1.2 in)
196226.9 mm (1.1 in)
196332.8 mm (1.3 in)
196432.8 mm (1.3 in)
1965184.7 mm (7.3 in)
1966129.6 mm (5.1 in)
1967314.4 mm (12.4 in)
196860.0 mm (2.4 in)
196964.8 mm (2.6 in)
197082.0 mm (3.2 in)
1971244.4 mm (9.6 in)
1972139.2 mm (5.5 in)
1973136.4 mm (5.4 in)
197442.4 mm (1.7 in)
1975149.9 mm (5.9 in)
1976154.8 mm (6.1 in)
197770.3 mm (2.8 in)
197859.9 mm (2.4 in)
19795.1 mm (0.20 in)
198070.1 mm (2.8 in)
1981100.4 mm (4.0 in)
198255.9 mm (2.2 in)
198340.4 mm (1.6 in)
1984120.4 mm (4.7 in)
198599.8 mm (3.9 in)
198652.1 mm (2.1 in)
198763.8 mm (2.5 in)
19880.0 mm (0.00 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Vallecillo (Smn) by year The longest dry spell of the year at Vallecillo (Smn), 1941 to 1988. The record is 256 days in 1977, marked on the chart; the median year is 84 days. 01002003001950196019701980Record: 256 days in 1977
The longest dry spell of the year at Vallecillo (Smn), 1941 to 1988. The record is 256 days in 1977, marked on the chart; the median year is 84 days.
Longest dry spell (CDD) at Vallecillo (Smn) by year
YearLongest dry spell (CDD)
194116 days
194265 days
194398 days
194448 days
194531 days
194678 days
1947122 days
194861 days
194951 days
1950126 days
1951129 days
195288 days
1953127 days
195484 days
195553 days
195651 days
195777 days
195864 days
195970 days
196065 days
196186 days
196289 days
196371 days
1964105 days
196542 days
196667 days
196755 days
196890 days
196963 days
197097 days
197139 days
197242 days
197377 days
197450 days
197592 days
197655 days
1977256 days
1978153 days
1979227 days
1980120 days
1981159 days
198284 days
1983145 days
1984136 days
1985139 days
1986214 days
1987123 days
1988213 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

42 years, 1942 to 1987

A day with at least 38.6 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 223.1 mm (8.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Vallecillo (Smn): the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years38.6 mm (1.5 in)
5 years69.4 mm (2.7 in)
10 years95.6 mm (3.8 in)
25 years137.5 mm (5.4 in)
50 years176.4 mm (6.9 in)Longer than the 42 years of record
100 years223.1 mm (8.8 in)Longer than the 42 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, 42 years of values from 1942 to 1987.

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: 179.8 mm (7.1 in) in 1957; 149.9 mm (5.9 in) in 1965; 149.9 mm (5.9 in) in 1975.

Download the Data

  • Data for Vallecillo (Smn) standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Vallecillo (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 2026-10-17 (17 October 2026). Records are computed by this site and are not official.

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