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San Luis Rio Colorado (Smn) Weather Records (MXN00026086)

Record envelope, standing records and threshold days for San Luis Rio Colorado (Smn) (MXN00026086), Mexico, with 64 years of record.

Key Facts for San Luis Rio Colorado (Smn)

  • San Luis Rio Colorado (Smn) (MXN00026086) is a weather station in Mexico at 32.43 latitude and -114.73 longitude, 50 m (164 ft) above sea level.
  • The station reports from 1924 to 1987, 64 years of record.
  • 1,464 records set at San Luis Rio Colorado (Smn) still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • San Luis Rio Colorado (Smn) set a daily record low maximum temperature of 9.4 C (48.9 F) on 26 December 1987.

About the Station

  • Location: Mexico, 32.43 latitude, -114.73 longitude.
  • Elevation: 50 m (164 ft).
  • Period of record: 1924 to 1987, 64 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 Luis Rio Colorado (Smn), with 2026 drawn through them The band shows the record high and record low for each calendar day at San Luis Rio Colorado (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 San Luis Rio Colorado (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 San Luis Rio Colorado (Smn), with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan37.8 C (100.0 F)-6.7 C (19.9 F)n/an/a
Feb42.8 C (109.0 F)-5.6 C (21.9 F)n/an/a
Mar40.6 C (105.1 F)-3.3 C (26.1 F)n/an/a
Apr41.7 C (107.1 F)0.6 C (33.1 F)n/an/a
May47.8 C (118.0 F)5.0 C (41.0 F)n/an/a
Jun50.0 C (122.0 F)7.2 C (45.0 F)n/an/a
Jul50.6 C (123.1 F)13.9 C (57.0 F)n/an/a
Aug50.0 C (122.0 F)13.3 C (55.9 F)n/an/a
Sep48.3 C (118.9 F)10.6 C (51.1 F)n/an/a
Oct48.3 C (118.9 F)2.2 C (36.0 F)n/an/a
Nov39.4 C (102.9 F)-4.4 C (24.1 F)n/an/a
Dec38.9 C (102.0 F)-5.0 C (23.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at San Luis Rio Colorado (Smn) by the year they were set 1,464 records at San Luis Rio Colorado (Smn) still stand. 1950 holds the most, with 121. 0501001501924: 31926: 81927: 151928: 221929: 211930: 451931: 371932: 351933: 611934: 461935: 371936: 551937: 461938: 251939: 141940: 11942: 161943: 181944: 31945: 121948: 351949: 411950: 1211951: 581952: 241953: 121954: 101955: 201956: 161957: 281958: 161959: 101960: 201961: 61962: 331963: 891964: 311965: 241966: 151967: 61968: 161969: 111970: 131971: 411972: 161973: 101974: 241975: 101976: 241977: 71978: 311979: 91980: 281981: 251982: 191983: 131984: 121985: 141987: 61924193119371944195219581964197019761982
1,464 records at San Luis Rio Colorado (Smn) still stand. 1950 holds the most, with 121.
Standing records at San Luis Rio Colorado (Smn) by the year they were set
Year setStanding records
19243
19268
192715
192822
192921
193045
193137
193235
193361
193446
193537
193655
193746
193825
193914
19401
194216
194318
19443
194512
194835
194941
1950121
195158
195224
195312
195410
195520
195616
195728
195816
195910
196020
19616
196233
196389
196431
196524
196615
19676
196816
196911
197013
197141
197216
197310
197424
197510
197624
19777
197831
19799
198028
198125
198219
198313
198412
198514
19876

Wettest Day of Each Month

Sep: 49.3 mm (1.9 in)
Record daily precipitation for each month at San Luis Rio Colorado (Smn) The wettest day on record for each calendar month at San Luis Rio Colorado (Smn). The most was 49.3 mm (1.9 in) on 17 September 1963. 0204060 Jan: 42.9 mm (1.7 in), 15 January 1979 Jan Feb: 33.8 mm (1.3 in), 28 February 1978 Feb Mar: 17.8 mm (0.7 in), 11 March 1973 Mar Apr: 19.8 mm (0.8 in), 14 April 1971 Apr May: 11.9 mm (0.5 in), 17 May 1945 May Jun: 7.9 mm (0.31 in), 29 June 1980 Jun Jul: 47.8 mm (1.9 in), 24 July 1982 Jul Aug: 28.4 mm (1.1 in), 26 August 1951 Aug Sep: 49.3 mm (1.9 in), 17 September 1963 Sep Oct: 36.8 mm (1.4 in), 10 October 1932 Oct Nov: 17.3 mm (0.7 in), 16 November 1965 Nov Dec: 38.9 mm (1.5 in), 9 December 1926 Dec
The wettest day on record for each calendar month at San Luis Rio Colorado (Smn). The most was 49.3 mm (1.9 in) on 17 September 1963.
Record daily precipitation for each month at San Luis Rio Colorado (Smn)
MonthRecord daily precipitation (mm)Date
Jan42.9 mm (1.7 in)15 January 1979
Feb33.8 mm (1.3 in)28 February 1978
Mar17.8 mm (0.7 in)11 March 1973
Apr19.8 mm (0.8 in)14 April 1971
May11.9 mm (0.5 in)17 May 1945
Jun7.9 mm (0.31 in)29 June 1980
Jul47.8 mm (1.9 in)24 July 1982
Aug28.4 mm (1.1 in)26 August 1951
Sep49.3 mm (1.9 in)17 September 1963
Oct36.8 mm (1.4 in)10 October 1932
Nov17.3 mm (0.7 in)16 November 1965
Dec38.9 mm (1.5 in)9 December 1926

Period of Record Coverage

1924 to 1987
Days with data per year at San Luis Rio Colorado (Smn) 59 years of record at San Luis Rio Colorado (Smn), 1924 to 1987. 15 years have data for under 90 percent of days and are left out of rankings: 1924, 1926, 1934, 1938, 1939, 1940, 1942, 1944 and others. 1924: 117 of 366 days1926: 134 of 365 days1927: 362 of 365 days1928: 330 of 366 days1929: 365 of 365 days1930: 361 of 365 days1931: 364 of 365 days1932: 365 of 366 days1933: 351 of 365 days1934: 299 of 365 days1935: 365 of 365 days1936: 335 of 366 days1937: 365 of 365 days1938: 303 of 365 days1939: 90 of 365 days1940: 31 of 366 days1942: 57 of 365 days1943: 353 of 365 days1944: 144 of 366 days1945: 269 of 365 days1948: 287 of 366 days1949: 267 of 365 days1950: 365 of 365 days1951: 363 of 365 days1952: 364 of 366 days1953: 364 of 365 days1954: 303 of 365 days1955: 364 of 365 days1956: 364 of 366 days1957: 363 of 365 days1958: 365 of 365 days1959: 364 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 364 of 365 days1963: 365 of 365 days1964: 304 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 364 of 366 days1969: 334 of 365 days1970: 365 of 365 days1971: 362 of 365 days1972: 366 of 366 days1973: 364 of 365 days1974: 350 of 365 days1975: 349 of 365 days1976: 363 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 366 of 366 days1981: 334 of 365 days1982: 365 of 365 days1983: 365 of 365 days1984: 366 of 366 days1985: 243 of 365 days1987: 184 of 365 days193019401950196019701980
59 years of record at San Luis Rio Colorado (Smn), 1924 to 1987. 15 years have data for under 90 percent of days and are left out of rankings: 1924, 1926, 1934, 1938, 1939, 1940, 1942, 1944 and others.
Days with data per year at San Luis Rio Colorado (Smn)
YearDays with dataShare of yearComplete
192411732%No
192613437%No
192736299%Yes
192833090%Yes
1929365100%Yes
193036199%Yes
1931364100%Yes
1932365100%Yes
193335196%Yes
193429982%No
1935365100%Yes
193633592%Yes
1937365100%Yes
193830383%No
19399025%No
1940318%No
19425716%No
194335397%Yes
194414439%No
194526974%No
194828778%No
194926773%No
1950365100%Yes
195136399%Yes
195236499%Yes
1953364100%Yes
195430383%No
1955364100%Yes
195636499%Yes
195736399%Yes
1958365100%Yes
1959364100%Yes
1960366100%Yes
1961365100%Yes
1962364100%Yes
1963365100%Yes
196430483%No
1965365100%Yes
1966365100%Yes
1967365100%Yes
196836499%Yes
196933492%Yes
1970365100%Yes
197136299%Yes
1972366100%Yes
1973364100%Yes
197435096%Yes
197534996%Yes
197636399%Yes
1977365100%Yes
1978365100%Yes
1979365100%Yes
1980366100%Yes
198133492%Yes
1982365100%Yes
1983365100%Yes
1984366100%Yes
198524367%No
198718450%No

Latest Records

20
Latest records at San Luis Rio Colorado (Smn)
DateStationRecordValueBeat old record byOld record stoodSignificance
26 December 1987San Luis Rio Colorado (Smn), MXdaily low max9.4 C (48.9 F)0.6 C (1.1 F)36 years17 of 100 (Routine)
26 December 1987San Luis Rio Colorado (Smn), MXdaily low min (Tie)-2.8 C (27.0 F)tie56 years5 of 100 (Routine)
25 December 1987San Luis Rio Colorado (Smn), MXdaily low max9.4 C (48.9 F)0.6 C (1.1 F)36 years17 of 100 (Routine)
16 December 1987San Luis Rio Colorado (Smn), MXdaily rain11.4 mm (0.4 in)5.6 mm (0.22 in)34 years20 of 100 (Routine)
15 December 1987San Luis Rio Colorado (Smn), MXdaily low min (Tie)-1.7 C (28.9 F)tie37 years4 of 100 (Routine)
13 December 1987San Luis Rio Colorado (Smn), MXdaily low max (Tie)11.7 C (53.1 F)tie26 years3 of 100 (Routine)
29 October 1987San Luis Rio Colorado (Smn), MXdaily high min (Tie)18.9 C (66.0 F)tie38 years4 of 100 (Routine)
27 October 1987San Luis Rio Colorado (Smn), MXdaily high min (Tie)20.0 C (68.0 F)tie38 years4 of 100 (Routine)
23 October 1987San Luis Rio Colorado (Smn), MXdaily rain0.8 mm (0.03 in)0.8 mm (0.03 in)62 years20 of 100 (Routine)
14 October 1987San Luis Rio Colorado (Smn), MXdaily high min25.0 C (77.0 F)3.3 C (5.9 F)50 years29 of 100 (Routine)
13 September 1987San Luis Rio Colorado (Smn), MXdaily low max30.0 C (86.0 F)1.7 C (3.1 F)34 years20 of 100 (Routine)
2 September 1987San Luis Rio Colorado (Smn), MXdaily high max46.1 C (115.0 F)1.1 C (2.0 F)36 years20 of 100 (Routine)
10 July 1987San Luis Rio Colorado (Smn), MXdaily low min (Tie)20.0 C (68.0 F)tie26 years3 of 100 (Routine)
3 July 1987San Luis Rio Colorado (Smn), MXmonthly low min13.9 C (57.0 F)1.7 C (3.1 F)30 years30 of 100 (Routine)
31 August 1985San Luis Rio Colorado (Smn), MXdaily high min (Tie)30.0 C (86.0 F)tie48 years5 of 100 (Routine)
25 August 1985San Luis Rio Colorado (Smn), MXdaily high min (Tie)30.0 C (86.0 F)tie52 years5 of 100 (Routine)
14 August 1985San Luis Rio Colorado (Smn), MXdaily low min (Tie)18.9 C (66.0 F)tie52 years5 of 100 (Routine)
2 August 1985San Luis Rio Colorado (Smn), MXdaily high max (Tie)47.8 C (118.0 F)tie4 years1 of 100 (Routine)
14 July 1985San Luis Rio Colorado (Smn), MXdaily high min (Tie)30.6 C (87.1 F)tie50 years5 of 100 (Routine)
9 July 1985San Luis Rio Colorado (Smn), MXdaily low max35.0 C (95.0 F)0.6 C (1.1 F)55 years23 of 100 (Routine)

Climate Trend

38 complete years, 1927 to 1984
Annual mean temperature at San Luis Rio Colorado (Smn) as warming stripes, 1927 to 1984 One stripe for each of 38 complete years at San Luis Rio Colorado (Smn), 1927 to 1984. Blue stripes are years cooler than the station's own mean of 22.7 C (72.9 F); red stripes are warmer. The coolest year was 1971, at 21.1 C (69.9 F), and the warmest was 1950, at 24.8 C (76.6 F). The strongest colour marks a difference of 2.1 C (3.8 F). 1927: 22.6 C, -0.2 C from the station mean1929: 21.9 C, -0.9 C from the station mean1930: 21.8 C, -0.9 C from the station mean1931: 22.4 C, -0.4 C from the station mean1932: 22.0 C, -0.7 C from the station mean1933: 22.2 C, -0.5 C from the station mean1935: 22.9 C, +0.2 C from the station mean1937: 23.3 C, +0.5 C from the station mean1943: 23.4 C, +0.7 C from the station mean1950: 24.8 C, +2.1 C from the station mean1951: 23.1 C, +0.3 C from the station mean1952: 22.4 C, -0.4 C from the station mean1953: 22.7 C, -0.1 C from the station mean1955: 22.2 C, -0.5 C from the station mean1956: 22.9 C, +0.1 C from the station mean1957: 23.1 C, +0.3 C from the station mean1958: 23.8 C, +1.0 C from the station mean1959: 23.3 C, +0.5 C from the station mean1960: 23.1 C, +0.3 C from the station mean1961: 22.5 C, -0.2 C from the station mean1962: 21.9 C, -0.8 C from the station mean1963: 21.6 C, -1.2 C from the station mean1965: 21.6 C, -1.2 C from the station mean1966: 22.5 C, -0.2 C from the station mean1967: 22.0 C, -0.7 C from the station mean1968: 22.0 C, -0.8 C from the station mean1970: 22.0 C, -0.7 C from the station mean1971: 21.1 C, -1.7 C from the station mean1972: 22.6 C, -0.1 C from the station mean1973: 22.2 C, -0.5 C from the station mean1976: 23.1 C, +0.3 C from the station mean1977: 23.6 C, +0.9 C from the station mean1978: 24.1 C, +1.4 C from the station mean1979: 23.7 C, +0.9 C from the station mean1980: 23.9 C, +1.2 C from the station mean1982: 23.0 C, +0.3 C from the station mean1983: 23.6 C, +0.9 C from the station mean1984: 23.6 C, +0.8 C from the station mean19271935194019451950195519601965197019751980
One stripe for each of 38 complete years at San Luis Rio Colorado (Smn), 1927 to 1984. Blue stripes are years cooler than the station's own mean of 22.7 C (72.9 F); red stripes are warmer. The coolest year was 1971, at 21.1 C (69.9 F), and the warmest was 1950, at 24.8 C (76.6 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at San Luis Rio Colorado (Smn) as warming stripes, 1927 to 1984
YearAnnual mean temperatureDifference from the station mean
192722.6 C-0.17 C
192921.9 C-0.86 C
193021.8 C-0.91 C
193122.4 C-0.39 C
193222.0 C-0.71 C
193322.2 C-0.50 C
193522.9 C+0.16 C
193723.3 C+0.54 C
194323.4 C+0.65 C
195024.8 C+2.06 C
195123.1 C+0.33 C
195222.4 C-0.39 C
195322.7 C-0.07 C
195522.2 C-0.53 C
195622.9 C+0.11 C
195723.1 C+0.33 C
195823.8 C+1.01 C
195923.3 C+0.53 C
196023.1 C+0.33 C
196122.5 C-0.22 C
196221.9 C-0.85 C
196321.6 C-1.17 C
196521.6 C-1.18 C
196622.5 C-0.23 C
196722.0 C-0.70 C
196822.0 C-0.77 C
197022.0 C-0.71 C
197121.1 C-1.68 C
197222.6 C-0.15 C
197322.2 C-0.51 C
197623.1 C+0.32 C
197723.6 C+0.88 C
197824.1 C+1.36 C
197923.7 C+0.91 C
198023.9 C+1.19 C
198223.0 C+0.28 C
198323.6 C+0.87 C
198423.6 C+0.84 C

The fitted trend in annual mean temperature here over 1927 to 1984 is 0.12 C (-0.04 to 0.27) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.2 F (-0.1 to 0.5) per decade. The slope is a straight line fitted to 38 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at San Luis Rio Colorado (Smn)
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.12 C (-0.04 to 0.27) per decade0.2 F (-0.1 to 0.5) per decade1927 to 198438Not clearly different from zero
Mean daily maximum-0.03 C (-0.27 to 0.22) per decade-0.05 F (-0.49 to 0.39) per decade1927 to 198438Not clearly different from zero
Mean daily minimum0.26 C (0.04 to 0.48) per decade0.5 F (0.1 to 0.9) per decade1927 to 198438Rise

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

1924 to 1987
Yearly extremes at San Luis Rio Colorado (Smn): the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)50.6 C (123.1 F)195746.7 C (116.1 F)59
Coldest night (TNn)-6.7 C (19.9 F)1950-1.7 C (28.9 F)59
Wettest day (Rx1day)49.3 mm (1.9 in)196314.0 mm (0.6 in)59
Wettest five days (Rx5day)61.8 mm (2.4 in)198215.7 mm (0.6 in)59
Longest dry spell (CDD)366 days1956159 days59

Hottest day (TXx)

Hottest day (TXx) at San Luis Rio Colorado (Smn) by year The hottest day of the year at San Luis Rio Colorado (Smn), 1924 to 1987. The record is 50.6 C (123.1 F) in 1957, marked on the chart; the median year is 46.7 C (116.1 F). 2030405060194019601980Record: 50.6 C (123.1 F) in 1957
The hottest day of the year at San Luis Rio Colorado (Smn), 1924 to 1987. The record is 50.6 C (123.1 F) in 1957, marked on the chart; the median year is 46.7 C (116.1 F).
Hottest day (TXx) at San Luis Rio Colorado (Smn) by year
YearHottest day (TXx)
192445.0 C (113.0 F)
192645.0 C (113.0 F)
192746.1 C (115.0 F)
192845.0 C (113.0 F)
192947.2 C (117.0 F)
193048.3 C (118.9 F)
193146.7 C (116.1 F)
193246.1 C (115.0 F)
193350.0 C (122.0 F)
193446.7 C (116.1 F)
193544.4 C (111.9 F)
193646.7 C (116.1 F)
193747.2 C (117.0 F)
193843.3 C (109.9 F)
193933.9 C (93.0 F)
194028.3 C (82.9 F)
194246.7 C (116.1 F)
194348.9 C (120.0 F)
194435.0 C (95.0 F)
194548.9 C (120.0 F)
194846.7 C (116.1 F)
194950.0 C (122.0 F)
195045.6 C (114.1 F)
195146.1 C (115.0 F)
195245.6 C (114.1 F)
195346.7 C (116.1 F)
195448.9 C (120.0 F)
195547.2 C (117.0 F)
195646.7 C (116.1 F)
195750.6 C (123.1 F)
195848.9 C (120.0 F)
195945.6 C (114.1 F)
196046.7 C (116.1 F)
196147.8 C (118.0 F)
196248.9 C (120.0 F)
196345.6 C (114.1 F)
196445.6 C (114.1 F)
196543.9 C (111.0 F)
196643.9 C (111.0 F)
196744.4 C (111.9 F)
196845.0 C (113.0 F)
196945.6 C (114.1 F)
197047.2 C (117.0 F)
197145.0 C (113.0 F)
197247.2 C (117.0 F)
197345.6 C (114.1 F)
197446.1 C (115.0 F)
197543.9 C (111.0 F)
197648.9 C (120.0 F)
197747.2 C (117.0 F)
197850.0 C (122.0 F)
197948.3 C (118.9 F)
198048.9 C (120.0 F)
198150.0 C (122.0 F)
198249.4 C (120.9 F)
198348.9 C (120.0 F)
198447.8 C (118.0 F)
198548.3 C (118.9 F)
198746.1 C (115.0 F)

Coldest night (TNn)

Coldest night (TNn) at San Luis Rio Colorado (Smn) by year The coldest night of the year at San Luis Rio Colorado (Smn), 1924 to 1987. The record is -6.7 C (19.9 F) in 1950, marked on the chart; the median year is -1.7 C (28.9 F). -1001020194019601980Record: -6.7 C (19.9 F) in 1950
The coldest night of the year at San Luis Rio Colorado (Smn), 1924 to 1987. The record is -6.7 C (19.9 F) in 1950, marked on the chart; the median year is -1.7 C (28.9 F).
Coldest night (TNn) at San Luis Rio Colorado (Smn) by year
YearColdest night (TNn)
19245.6 C (42.1 F)
1926-2.2 C (28.0 F)
1927-1.1 C (30.0 F)
1928-3.3 C (26.1 F)
1929-5.0 C (23.0 F)
1930-5.0 C (23.0 F)
1931-4.4 C (24.1 F)
1932-5.0 C (23.0 F)
1933-5.6 C (21.9 F)
1934-3.9 C (25.0 F)
19350.6 C (33.1 F)
19362.8 C (37.0 F)
1937-6.1 C (21.0 F)
1938-4.4 C (24.1 F)
1939-5.6 C (21.9 F)
19400.0 C (32.0 F)
194215.0 C (59.0 F)
1943-4.4 C (24.1 F)
19440.0 C (32.0 F)
19450.6 C (33.1 F)
1948-5.0 C (23.0 F)
1949-5.0 C (23.0 F)
1950-6.7 C (19.9 F)
1951-1.1 C (30.0 F)
1952-3.9 C (25.0 F)
1953-1.1 C (30.0 F)
1954-2.2 C (28.0 F)
1955-1.1 C (30.0 F)
1956-2.8 C (27.0 F)
19570.0 C (32.0 F)
1958-1.1 C (30.0 F)
19590.6 C (33.1 F)
1960-2.2 C (28.0 F)
19611.7 C (35.1 F)
1962-4.4 C (24.1 F)
1963-3.3 C (26.1 F)
1964-4.4 C (24.1 F)
19650.6 C (33.1 F)
1966-1.7 C (28.9 F)
19670.6 C (33.1 F)
1968-4.4 C (24.1 F)
1969-1.1 C (30.0 F)
1970-1.7 C (28.9 F)
1971-1.1 C (30.0 F)
1972-1.7 C (28.9 F)
1973-0.6 C (30.9 F)
1974-0.6 C (30.9 F)
19750.0 C (32.0 F)
1976-3.9 C (25.0 F)
19770.0 C (32.0 F)
1978-2.8 C (27.0 F)
19790.6 C (33.1 F)
19802.8 C (37.0 F)
19812.2 C (36.0 F)
19820.6 C (33.1 F)
19831.7 C (35.1 F)
19841.1 C (34.0 F)
1985-2.2 C (28.0 F)
1987-2.8 C (27.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at San Luis Rio Colorado (Smn) by year The wettest day of the year at San Luis Rio Colorado (Smn), 1924 to 1987. The record is 49.3 mm (1.9 in) in 1963, marked on the chart; the median year is 14.0 mm (0.6 in). 0204060194019601980Record: 49.3 mm (1.9 in) in 1963
The wettest day of the year at San Luis Rio Colorado (Smn), 1924 to 1987. The record is 49.3 mm (1.9 in) in 1963, marked on the chart; the median year is 14.0 mm (0.6 in).
Wettest day (Rx1day) at San Luis Rio Colorado (Smn) by year
YearWettest day (Rx1day)
19240.0 mm (0.00 in)
192638.9 mm (1.5 in)
192739.9 mm (1.6 in)
192816.3 mm (0.6 in)
19296.9 mm (0.27 in)
193011.9 mm (0.5 in)
193119.8 mm (0.8 in)
193236.8 mm (1.4 in)
193315.7 mm (0.6 in)
193414.0 mm (0.6 in)
193510.4 mm (0.4 in)
19367.4 mm (0.29 in)
19377.4 mm (0.29 in)
19387.9 mm (0.31 in)
19399.4 mm (0.37 in)
19400.0 mm (0.00 in)
19420.0 mm (0.00 in)
194310.9 mm (0.4 in)
194415.0 mm (0.6 in)
194514.0 mm (0.6 in)
19489.9 mm (0.39 in)
194919.8 mm (0.8 in)
195019.8 mm (0.8 in)
195128.4 mm (1.1 in)
195217.8 mm (0.7 in)
19536.1 mm (0.24 in)
19543.8 mm (0.15 in)
195515.7 mm (0.6 in)
19560.0 mm (0.00 in)
195732.8 mm (1.3 in)
19585.8 mm (0.23 in)
195912.7 mm (0.5 in)
196022.1 mm (0.9 in)
196121.8 mm (0.9 in)
196210.2 mm (0.4 in)
196349.3 mm (1.9 in)
19646.4 mm (0.25 in)
196517.3 mm (0.7 in)
19668.4 mm (0.33 in)
19674.3 mm (0.17 in)
196814.0 mm (0.6 in)
196915.0 mm (0.6 in)
19709.9 mm (0.39 in)
197119.8 mm (0.8 in)
19720.0 mm (0.00 in)
197317.8 mm (0.7 in)
197411.9 mm (0.5 in)
19759.9 mm (0.39 in)
197615.7 mm (0.6 in)
197718.8 mm (0.7 in)
197833.8 mm (1.3 in)
197942.9 mm (1.7 in)
19807.9 mm (0.31 in)
198114.0 mm (0.6 in)
198247.8 mm (1.9 in)
198317.8 mm (0.7 in)
198410.4 mm (0.4 in)
19850.8 mm (0.03 in)
198711.4 mm (0.4 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at San Luis Rio Colorado (Smn) by year The wettest five days of the year at San Luis Rio Colorado (Smn), 1924 to 1987. The record is 61.8 mm (2.4 in) in 1982, marked on the chart; the median year is 15.7 mm (0.6 in). 020406080194019601980Record: 61.8 mm (2.4 in) in 1982
The wettest five days of the year at San Luis Rio Colorado (Smn), 1924 to 1987. The record is 61.8 mm (2.4 in) in 1982, marked on the chart; the median year is 15.7 mm (0.6 in).
Wettest five days (Rx5day) at San Luis Rio Colorado (Smn) by year
YearWettest five days (Rx5day)
19240.0 mm (0.00 in)
192659.5 mm (2.3 in)
192739.9 mm (1.6 in)
19283.6 mm (0.14 in)
19297.6 mm (0.30 in)
193024.6 mm (1.0 in)
193124.5 mm (1.0 in)
193254.6 mm (2.1 in)
193315.7 mm (0.6 in)
193414.0 mm (0.6 in)
193522.6 mm (0.9 in)
193612.7 mm (0.5 in)
193713.2 mm (0.5 in)
193815.3 mm (0.6 in)
193914.7 mm (0.6 in)
19400.0 mm (0.00 in)
19420.0 mm (0.00 in)
194310.9 mm (0.4 in)
194431.4 mm (1.2 in)
194528.7 mm (1.1 in)
19489.9 mm (0.39 in)
194929.7 mm (1.2 in)
195019.8 mm (0.8 in)
195146.4 mm (1.8 in)
195217.8 mm (0.7 in)
19536.1 mm (0.24 in)
19544.6 mm (0.18 in)
195527.9 mm (1.1 in)
19560.0 mm (0.00 in)
195732.8 mm (1.3 in)
19587.1 mm (0.28 in)
195916.8 mm (0.7 in)
196022.1 mm (0.9 in)
196133.5 mm (1.3 in)
196214.7 mm (0.6 in)
196349.3 mm (1.9 in)
196410.0 mm (0.4 in)
196517.3 mm (0.7 in)
19669.2 mm (0.36 in)
19674.3 mm (0.17 in)
196816.8 mm (0.7 in)
196915.0 mm (0.6 in)
19709.9 mm (0.39 in)
197119.8 mm (0.8 in)
19720.0 mm (0.00 in)
197317.8 mm (0.7 in)
197411.9 mm (0.5 in)
19759.9 mm (0.39 in)
197615.7 mm (0.6 in)
197724.7 mm (1.0 in)
197833.8 mm (1.3 in)
197950.8 mm (2.0 in)
198013.2 mm (0.5 in)
198116.8 mm (0.7 in)
198261.8 mm (2.4 in)
198322.8 mm (0.9 in)
198420.6 mm (0.8 in)
19850.8 mm (0.03 in)
198711.4 mm (0.4 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at San Luis Rio Colorado (Smn) by year The longest dry spell of the year at San Luis Rio Colorado (Smn), 1924 to 1987. The record is 366 days in 1956, marked on the chart; the median year is 159 days. 0100200300400194019601980Record: 366 days in 1956
The longest dry spell of the year at San Luis Rio Colorado (Smn), 1924 to 1987. The record is 366 days in 1956, marked on the chart; the median year is 159 days.
Longest dry spell (CDD) at San Luis Rio Colorado (Smn) by year
YearLongest dry spell (CDD)
1924118 days
192685 days
1927123 days
1928107 days
1929202 days
1930159 days
193185 days
1932233 days
1933140 days
1934160 days
1935178 days
1936148 days
193799 days
193884 days
193937 days
194031 days
194231 days
1943350 days
194450 days
1945136 days
1948154 days
1949127 days
1950187 days
195192 days
1952273 days
1953254 days
1954285 days
1955182 days
1956366 days
1957151 days
1958144 days
1959164 days
1960221 days
1961190 days
1962190 days
1963140 days
196487 days
1965319 days
1966234 days
1967278 days
1968215 days
1969141 days
1970234 days
1971126 days
1972366 days
1973295 days
1974155 days
1975202 days
1976163 days
1977226 days
1978114 days
1979142 days
1980164 days
1981271 days
1982128 days
1983184 days
1984132 days
1985243 days
198786 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

46 years, 1927 to 1984

A day with at least 14.2 mm (0.6 in) of rain is expected about once in 2 years. A day with at least 61.5 mm (2.4 in) of rain is expected about once in 100 years.

Rainfall return levels at San Luis Rio Colorado (Smn): the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years14.2 mm (0.6 in)
5 years24.3 mm (1.0 in)
10 years32.0 mm (1.3 in)
25 years42.8 mm (1.7 in)
50 years51.7 mm (2.0 in)Longer than the 46 years of record
100 years61.5 mm (2.4 in)Longer than the 46 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, 46 years of values from 1927 to 1984.

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: 49.3 mm (1.9 in) in 1963; 47.8 mm (1.9 in) in 1982; 42.9 mm (1.7 in) in 1979.

Download the Data

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