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Rio Grande (Smn) Weather Records (MXN00032045)

Record envelope, standing records and threshold days for Rio Grande (Smn) (MXN00032045), Mexico, with 91 years of record.

Key Facts for Rio Grande (Smn)

  • Rio Grande (Smn) (MXN00032045) is a weather station in Mexico at 23.82 latitude and -103.02 longitude, 1,902 m (6,240 ft) above sea level.
  • The station reports from 1922 to 2012, 91 years of record.
  • 1,464 records set at Rio Grande (Smn) still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • Rio Grande (Smn) tied a daily record low maximum temperature of 18.9 C (66.0 F) on 17 October 2012.

About the Station

  • Location: Mexico, 23.82 latitude, -103.02 longitude.
  • Elevation: 1,902 m (6,240 ft).
  • Period of record: 1922 to 2012, 91 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 Rio Grande (Smn), with 2026 drawn through them The band shows the record high and record low for each calendar day at Rio Grande (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 Rio Grande (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 Rio Grande (Smn), with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan31.7 C (89.1 F)-10.0 C (14.0 F)n/an/a
Feb35.0 C (95.0 F)-10.6 C (12.9 F)n/an/a
Mar42.8 C (109.0 F)-7.2 C (19.0 F)n/an/a
Apr40.6 C (105.1 F)-3.3 C (26.1 F)n/an/a
May43.9 C (111.0 F)-2.2 C (28.0 F)n/an/a
Jun43.9 C (111.0 F)0.0 C (32.0 F)n/an/a
Jul40.6 C (105.1 F)1.7 C (35.1 F)n/an/a
Aug40.6 C (105.1 F)1.7 C (35.1 F)n/an/a
Sep41.7 C (107.1 F)0.0 C (32.0 F)n/an/a
Oct41.7 C (107.1 F)-3.3 C (26.1 F)n/an/a
Nov38.9 C (102.0 F)-10.0 C (14.0 F)n/an/a
Dec33.9 C (93.0 F)-11.1 C (12.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Rio Grande (Smn) by the year they were set 1,464 records at Rio Grande (Smn) still stand. 1947 holds the most, with 98. 02550751001922: 451923: 131924: 221925: 321926: 361927: 261928: 201929: 381930: 291931: 221932: 341933: 171934: 151935: 141936: 81941: 51942: 791943: 411944: 321945: 431946: 331947: 981948: 231949: 221950: 331951: 231952: 221953: 161954: 331955: 231956: 251957: 171958: 101959: 281960: 861961: 61962: 271963: 591964: 331965: 121968: 21970: 261991: 221992: 181993: 161994: 91995: 91996: 91997: 331998: 121999: 82000: 102005: 122006: 172007: 172008: 52009: 82010: 142011: 112012: 61922192819341944195019561962199119972007
1,464 records at Rio Grande (Smn) still stand. 1947 holds the most, with 98.
Standing records at Rio Grande (Smn) by the year they were set
Year setStanding records
192245
192313
192422
192532
192636
192726
192820
192938
193029
193122
193234
193317
193415
193514
19368
19415
194279
194341
194432
194543
194633
194798
194823
194922
195033
195123
195222
195316
195433
195523
195625
195717
195810
195928
196086
19616
196227
196359
196433
196512
19682
197026
199122
199218
199316
19949
19959
19969
199733
199812
19998
200010
200512
200617
200717
20085
20098
201014
201111
20126

All-Time Record Progression

1 new records
When Rio Grande (Smn) set new all-time records 1 all-time records were set at Rio Grande (Smn) between 12 December 1997 and 12 December 1997. Each dot is a new record. Record low minimum temperature12 December 1997: Record low minimum temperature -11.1 C (12.0 F)
1 all-time records were set at Rio Grande (Smn) between 12 December 1997 and 12 December 1997. Each dot is a new record.
When Rio Grande (Smn) set new all-time records
DateKindDetail
1997-12-12Record low minimum temperatureRecord low minimum temperature -11.1 C (12.0 F)

Wettest Day of Each Month

Jul: 134.9 mm (5.3 in)
Record daily precipitation for each month at Rio Grande (Smn) The wettest day on record for each calendar month at Rio Grande (Smn). The most was 134.9 mm (5.3 in) on 19 July 1952. 050100150 Jan: 49.8 mm (2.0 in), 2 January 1948 Jan Feb: 24.9 mm (1.0 in), 22 February 1953 Feb Mar: 25.9 mm (1.0 in), 26 March 1925 Mar Apr: 17.3 mm (0.7 in), 16 April 1994 Apr May: 39.9 mm (1.6 in), 26 May 1930 May Jun: 65.0 mm (2.6 in), 20 June 2007 Jun Jul: 134.9 mm (5.3 in), 19 July 1952 Jul Aug: 52.8 mm (2.1 in), 7 August 1998 Aug Sep: 69.9 mm (2.8 in), 15 September 1958 Sep Oct: 89.9 mm (3.5 in), 3 October 1996 Oct Nov: 42.9 mm (1.7 in), 1 November 1953 Nov Dec: 24.9 mm (1.0 in), 10 December 1941 Dec
The wettest day on record for each calendar month at Rio Grande (Smn). The most was 134.9 mm (5.3 in) on 19 July 1952.
Record daily precipitation for each month at Rio Grande (Smn)
MonthRecord daily precipitation (mm)Date
Jan49.8 mm (2.0 in)2 January 1948
Feb24.9 mm (1.0 in)22 February 1953
Mar25.9 mm (1.0 in)26 March 1925
Apr17.3 mm (0.7 in)16 April 1994
May39.9 mm (1.6 in)26 May 1930
Jun65.0 mm (2.6 in)20 June 2007
Jul134.9 mm (5.3 in)19 July 1952
Aug52.8 mm (2.1 in)7 August 1998
Sep69.9 mm (2.8 in)15 September 1958
Oct89.9 mm (3.5 in)3 October 1996
Nov42.9 mm (1.7 in)1 November 1953
Dec24.9 mm (1.0 in)10 December 1941

Period of Record Coverage

1922 to 2012
Days with data per year at Rio Grande (Smn) 61 years of record at Rio Grande (Smn), 1922 to 2012. 13 years have data for under 90 percent of days and are left out of rankings: 1922, 1933, 1934, 1936, 1941, 1946, 1953, 1954 and others. 1922: 175 of 365 days1923: 365 of 365 days1924: 365 of 366 days1925: 365 of 365 days1926: 365 of 365 days1927: 365 of 365 days1928: 366 of 366 days1929: 365 of 365 days1930: 365 of 365 days1931: 365 of 365 days1932: 366 of 366 days1933: 273 of 365 days1934: 294 of 365 days1935: 364 of 365 days1936: 152 of 366 days1941: 75 of 365 days1942: 361 of 365 days1943: 363 of 365 days1944: 335 of 366 days1945: 365 of 365 days1946: 92 of 365 days1947: 337 of 365 days1948: 363 of 366 days1949: 365 of 365 days1950: 332 of 365 days1951: 334 of 365 days1952: 363 of 366 days1953: 295 of 365 days1954: 297 of 365 days1955: 334 of 365 days1956: 360 of 366 days1957: 363 of 365 days1958: 363 of 365 days1959: 364 of 365 days1960: 364 of 366 days1961: 365 of 365 days1962: 356 of 365 days1963: 354 of 365 days1964: 331 of 366 days1965: 293 of 365 days1968: 176 of 366 days1969: 31 of 365 days1970: 235 of 365 days1991: 365 of 365 days1992: 335 of 366 days1993: 364 of 365 days1994: 365 of 365 days1995: 365 of 365 days1996: 366 of 366 days1997: 364 of 365 days1998: 365 of 365 days1999: 329 of 365 days2000: 330 of 366 days2005: 365 of 365 days2006: 361 of 365 days2007: 364 of 365 days2008: 306 of 366 days2009: 364 of 365 days2010: 365 of 365 days2011: 365 of 365 days2012: 365 of 366 days193019501960197020002010
61 years of record at Rio Grande (Smn), 1922 to 2012. 13 years have data for under 90 percent of days and are left out of rankings: 1922, 1933, 1934, 1936, 1941, 1946, 1953, 1954 and others.
Days with data per year at Rio Grande (Smn)
YearDays with dataShare of yearComplete
192217548%No
1923365100%Yes
1924365100%Yes
1925365100%Yes
1926365100%Yes
1927365100%Yes
1928366100%Yes
1929365100%Yes
1930365100%Yes
1931365100%Yes
1932366100%Yes
193327375%No
193429481%No
1935364100%Yes
193615242%No
19417521%No
194236199%Yes
194336399%Yes
194433592%Yes
1945365100%Yes
19469225%No
194733792%Yes
194836399%Yes
1949365100%Yes
195033291%Yes
195133492%Yes
195236399%Yes
195329581%No
195429781%No
195533492%Yes
195636098%Yes
195736399%Yes
195836399%Yes
1959364100%Yes
196036499%Yes
1961365100%Yes
196235698%Yes
196335497%Yes
196433190%Yes
196529380%No
196817648%No
1969318%No
197023564%No
1991365100%Yes
199233592%Yes
1993364100%Yes
1994365100%Yes
1995365100%Yes
1996366100%Yes
1997364100%Yes
1998365100%Yes
199932990%Yes
200033090%Yes
2005365100%Yes
200636199%Yes
2007364100%Yes
200830684%No
2009364100%Yes
2010365100%Yes
2011365100%Yes
2012365100%Yes

Latest Records

20
Latest records at Rio Grande (Smn)
DateStationRecordValueBeat old record byOld record stoodSignificance
17 October 2012Rio Grande (Smn), MXdaily low max (Tie)18.9 C (66.0 F)tie15 years3 of 100 (Routine)
3 July 2012Rio Grande (Smn), MXdaily rain28.4 mm (1.1 in)8.6 mm (0.34 in)49 years31 of 100 (Routine)
29 March 2012Rio Grande (Smn), MXdaily rain4.3 mm (0.17 in)4.3 mm (0.17 in)89 years20 of 100 (Routine)
3 March 2012Rio Grande (Smn), MXdaily high min10.0 C (50.0 F)1.1 C (2.0 F)84 years37 of 100 (Notable)
29 February 2012Rio Grande (Smn), MXdaily high max31.7 C (89.1 F)1.1 C (2.0 F)68 years31 of 100 (Routine)
16 February 2012Rio Grande (Smn), MXdaily rain6.6 mm (0.26 in)6.6 mm (0.26 in)88 years20 of 100 (Routine)
11 February 2012Rio Grande (Smn), MXdaily rain7.1 mm (0.28 in)2.3 mm (0.09 in)16 years16 of 100 (Routine)
11 February 2012Rio Grande (Smn), MXdaily low max (Tie)16.7 C (62.1 F)tie52 years6 of 100 (Routine)
9 February 2012Rio Grande (Smn), MXdaily low max15.6 C (60.1 F)1.1 C (2.0 F)52 years26 of 100 (Routine)
8 February 2012Rio Grande (Smn), MXdaily rain1.0 mm (0.04 in)1.0 mm (0.04 in)88 years20 of 100 (Routine)
29 January 2012Rio Grande (Smn), MXdaily rain18.8 mm (0.7 in)9.9 mm (0.39 in)48 years20 of 100 (Routine)
27 January 2012Rio Grande (Smn), MXdaily low min-5.0 C (23.0 F)0.6 C (1.1 F)13 years14 of 100 (Routine)
24 January 2012Rio Grande (Smn), MXdaily high min7.8 C (46.0 F)1.1 C (2.0 F)64 years31 of 100 (Routine)
2 January 2012Rio Grande (Smn), MXdaily high min8.3 C (46.9 F)0.5 C (0.9 F)57 years27 of 100 (Routine)
30 November 2011Rio Grande (Smn), MXdaily low min-6.1 C (21.0 F)1.1 C (2.0 F)78 years34 of 100 (Routine)
29 November 2011Rio Grande (Smn), MXdaily low min-8.9 C (16.0 F)1.7 C (3.1 F)78 years36 of 100 (Notable)
28 November 2011Rio Grande (Smn), MXmonthly low min-10.0 C (14.0 F)2.2 C (4.0 F)78 years47 of 100 (Notable)
27 November 2011Rio Grande (Smn), MXmonthly low max (Tie)10.6 C (51.1 F)tie82 years10 of 100 (Routine)
12 October 2011Rio Grande (Smn), MXdaily low max18.9 C (66.0 F)2.2 C (4.0 F)5 years15 of 100 (Routine)
11 October 2011Rio Grande (Smn), MXdaily low max15.0 C (59.0 F)5.0 C (9.0 F)20 years27 of 100 (Routine)

Climate Trend

38 complete years, 1923 to 2012
Annual mean temperature at Rio Grande (Smn) as warming stripes, 1923 to 2012 One stripe for each of 38 complete years at Rio Grande (Smn), 1923 to 2012. Blue stripes are years cooler than the station's own mean of 17.6 C (63.6 F); red stripes are warmer. The coolest year was 1963, at 15.2 C (59.3 F), and the warmest was 1945, at 20.9 C (69.7 F). The strongest colour marks a difference of 3.4 C (6.1 F). 1923: 18.4 C, +0.8 C from the station mean1924: 17.9 C, +0.3 C from the station mean1925: 17.5 C, 0.0 C from the station mean1926: 17.6 C, 0.0 C from the station mean1927: 17.4 C, -0.2 C from the station mean1928: 17.1 C, -0.4 C from the station mean1929: 17.0 C, -0.6 C from the station mean1930: 17.3 C, -0.3 C from the station mean1931: 17.1 C, -0.5 C from the station mean1932: 17.4 C, -0.2 C from the station mean1935: 16.5 C, -1.0 C from the station mean1943: 19.8 C, +2.2 C from the station mean1945: 20.9 C, +3.3 C from the station mean1948: 16.8 C, -0.7 C from the station mean1949: 20.0 C, +2.4 C from the station mean1952: 18.9 C, +1.3 C from the station mean1956: 18.2 C, +0.6 C from the station mean1957: 18.8 C, +1.2 C from the station mean1958: 18.5 C, +0.9 C from the station mean1959: 17.8 C, +0.2 C from the station mean1960: 20.8 C, +3.2 C from the station mean1961: 19.0 C, +1.4 C from the station mean1962: 16.6 C, -1.0 C from the station mean1963: 15.2 C, -2.4 C from the station mean1991: 16.7 C, -0.8 C from the station mean1993: 16.7 C, -0.8 C from the station mean1994: 17.4 C, -0.2 C from the station mean1995: 17.4 C, -0.2 C from the station mean1996: 16.8 C, -0.8 C from the station mean1997: 16.0 C, -1.6 C from the station mean1998: 17.2 C, -0.4 C from the station mean2005: 16.1 C, -1.5 C from the station mean2006: 16.3 C, -1.3 C from the station mean2007: 16.1 C, -1.5 C from the station mean2009: 17.2 C, -0.4 C from the station mean2010: 15.9 C, -1.7 C from the station mean2011: 17.8 C, +0.3 C from the station mean2012: 17.8 C, +0.2 C from the station mean1923193019401950196019701980199020002010
One stripe for each of 38 complete years at Rio Grande (Smn), 1923 to 2012. Blue stripes are years cooler than the station's own mean of 17.6 C (63.6 F); red stripes are warmer. The coolest year was 1963, at 15.2 C (59.3 F), and the warmest was 1945, at 20.9 C (69.7 F). The strongest colour marks a difference of 3.4 C (6.1 F).
Annual mean temperature at Rio Grande (Smn) as warming stripes, 1923 to 2012
YearAnnual mean temperatureDifference from the station mean
192318.4 C+0.78 C
192417.9 C+0.35 C
192517.5 C-0.03 C
192617.6 C0.00 C
192717.4 C-0.22 C
192817.1 C-0.44 C
192917.0 C-0.55 C
193017.3 C-0.26 C
193117.1 C-0.51 C
193217.4 C-0.16 C
193516.5 C-1.03 C
194319.8 C+2.21 C
194520.9 C+3.35 C
194816.8 C-0.74 C
194920.0 C+2.43 C
195218.9 C+1.32 C
195618.2 C+0.60 C
195718.8 C+1.21 C
195818.5 C+0.91 C
195917.8 C+0.19 C
196020.8 C+3.24 C
196119.0 C+1.39 C
196216.6 C-1.01 C
196315.2 C-2.40 C
199116.7 C-0.84 C
199316.7 C-0.84 C
199417.4 C-0.20 C
199517.4 C-0.16 C
199616.8 C-0.80 C
199716.0 C-1.58 C
199817.2 C-0.41 C
200516.1 C-1.45 C
200616.3 C-1.30 C
200716.1 C-1.45 C
200917.2 C-0.38 C
201015.9 C-1.69 C
201117.8 C+0.26 C
201217.8 C+0.25 C

The annual mean temperature here has fallen by 0.14 C (0.01 to 0.27) per decade over 1923 to 2012. In Fahrenheit: 0.26 F (0.02 to 0.49) 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 Rio Grande (Smn)
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.14 C (-0.27 to -0.01) per decade-0.26 F (-0.49 to -0.02) per decade1923 to 201238Fall
Mean daily maximum-0.3 C (-0.5 to -0.1) per decade-0.5 F (-0.8 to -0.2) per decade1923 to 201238Fall
Mean daily minimum0.00 C (-0.15 to 0.16) per decade0.01 F (-0.27 to 0.28) per decade1923 to 201238Not 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

1922 to 2012
Yearly extremes at Rio Grande (Smn): the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)43.9 C (111.0 F)194236.7 C (98.1 F)61
Coldest night (TNn)-11.1 C (12.0 F)1997-5.0 C (23.0 F)61
Wettest day (Rx1day)134.9 mm (5.3 in)195233.8 mm (1.3 in)61
Wettest five days (Rx5day)173.8 mm (6.8 in)199667.5 mm (2.7 in)61
Longest dry spell (CDD)191 days196077 days61

Hottest day (TXx)

Hottest day (TXx) at Rio Grande (Smn) by year The hottest day of the year at Rio Grande (Smn), 1922 to 2012. The record is 43.9 C (111.0 F) in 1942, marked on the chart; the median year is 36.7 C (98.1 F). 25303540451940196019802000Record: 43.9 C (111.0 F) in 1942
The hottest day of the year at Rio Grande (Smn), 1922 to 2012. The record is 43.9 C (111.0 F) in 1942, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Rio Grande (Smn) by year
YearHottest day (TXx)
192238.3 C (100.9 F)
192338.9 C (102.0 F)
192438.9 C (102.0 F)
192540.0 C (104.0 F)
192638.9 C (102.0 F)
192737.8 C (100.0 F)
192836.7 C (98.1 F)
192936.7 C (98.1 F)
193038.9 C (102.0 F)
193136.7 C (98.1 F)
193239.4 C (102.9 F)
193339.4 C (102.9 F)
193433.9 C (93.0 F)
193535.0 C (95.0 F)
193633.9 C (93.0 F)
194132.8 C (91.0 F)
194243.9 C (111.0 F)
194340.6 C (105.1 F)
194436.7 C (98.1 F)
194537.8 C (100.0 F)
194632.8 C (91.0 F)
194740.0 C (104.0 F)
194835.0 C (95.0 F)
194942.8 C (109.0 F)
195041.7 C (107.1 F)
195141.7 C (107.1 F)
195237.8 C (100.0 F)
195336.7 C (98.1 F)
195442.8 C (109.0 F)
195538.9 C (102.0 F)
195640.6 C (105.1 F)
195740.0 C (104.0 F)
195835.6 C (96.1 F)
195940.0 C (104.0 F)
196041.7 C (107.1 F)
196138.9 C (102.0 F)
196237.8 C (100.0 F)
196336.7 C (98.1 F)
196435.6 C (96.1 F)
196535.6 C (96.1 F)
196835.6 C (96.1 F)
196927.8 C (82.0 F)
197036.7 C (98.1 F)
199135.6 C (96.1 F)
199233.3 C (91.9 F)
199335.0 C (95.0 F)
199433.9 C (93.0 F)
199535.6 C (96.1 F)
199636.7 C (98.1 F)
199733.9 C (93.0 F)
199836.7 C (98.1 F)
199935.0 C (95.0 F)
200035.0 C (95.0 F)
200536.7 C (98.1 F)
200634.4 C (93.9 F)
200735.6 C (96.1 F)
200831.7 C (89.1 F)
200932.8 C (91.0 F)
201034.4 C (93.9 F)
201138.9 C (102.0 F)
201237.8 C (100.0 F)

Coldest night (TNn)

Coldest night (TNn) at Rio Grande (Smn) by year The coldest night of the year at Rio Grande (Smn), 1922 to 2012. The record is -11.1 C (12.0 F) in 1997, marked on the chart; the median year is -5.0 C (23.0 F). -15-10-5051940196019802000Record: -11.1 C (12.0 F) in 1997
The coldest night of the year at Rio Grande (Smn), 1922 to 2012. The record is -11.1 C (12.0 F) in 1997, marked on the chart; the median year is -5.0 C (23.0 F).
Coldest night (TNn) at Rio Grande (Smn) by year
YearColdest night (TNn)
1922-4.4 C (24.1 F)
1923-3.9 C (25.0 F)
1924-6.1 C (21.0 F)
1925-8.3 C (17.1 F)
1926-7.2 C (19.0 F)
1927-7.2 C (19.0 F)
1928-6.1 C (21.0 F)
1929-8.3 C (17.1 F)
1930-8.9 C (16.0 F)
1931-8.3 C (17.1 F)
1932-7.8 C (18.0 F)
1933-10.0 C (14.0 F)
1934-7.2 C (19.0 F)
1935-5.6 C (21.9 F)
1936-6.1 C (21.0 F)
19410.0 C (32.0 F)
1942-5.0 C (23.0 F)
1943-2.2 C (28.0 F)
1944-6.1 C (21.0 F)
1945-2.2 C (28.0 F)
19464.4 C (39.9 F)
1947-2.2 C (28.0 F)
19480.0 C (32.0 F)
19490.0 C (32.0 F)
1950-4.4 C (24.1 F)
1951-6.1 C (21.0 F)
1952-6.1 C (21.0 F)
1953-10.0 C (14.0 F)
19540.0 C (32.0 F)
1955-4.4 C (24.1 F)
1956-5.0 C (23.0 F)
1957-3.3 C (26.1 F)
1958-5.0 C (23.0 F)
19590.0 C (32.0 F)
19600.0 C (32.0 F)
1961-5.0 C (23.0 F)
1962-9.4 C (15.1 F)
19630.0 C (32.0 F)
19640.0 C (32.0 F)
1965-0.6 C (30.9 F)
1968-3.3 C (26.1 F)
19690.0 C (32.0 F)
19700.0 C (32.0 F)
1991-5.0 C (23.0 F)
1992-5.0 C (23.0 F)
1993-5.0 C (23.0 F)
1994-5.0 C (23.0 F)
1995-3.3 C (26.1 F)
1996-4.4 C (24.1 F)
1997-11.1 C (12.0 F)
1998-7.2 C (19.0 F)
1999-6.1 C (21.0 F)
2000-5.0 C (23.0 F)
2005-5.0 C (23.0 F)
2006-10.0 C (14.0 F)
2007-3.9 C (25.0 F)
2008-7.8 C (18.0 F)
2009-1.7 C (28.9 F)
2010-5.0 C (23.0 F)
2011-10.6 C (12.9 F)
2012-6.1 C (21.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Rio Grande (Smn) by year The wettest day of the year at Rio Grande (Smn), 1922 to 2012. The record is 134.9 mm (5.3 in) in 1952, marked on the chart; the median year is 33.8 mm (1.3 in). 0501001501940196019802000Record: 134.9 mm (5.3 in) in 1952
The wettest day of the year at Rio Grande (Smn), 1922 to 2012. The record is 134.9 mm (5.3 in) in 1952, marked on the chart; the median year is 33.8 mm (1.3 in).
Wettest day (Rx1day) at Rio Grande (Smn) by year
YearWettest day (Rx1day)
192249.8 mm (2.0 in)
192330.0 mm (1.2 in)
192430.0 mm (1.2 in)
192547.5 mm (1.9 in)
192638.1 mm (1.5 in)
192779.8 mm (3.1 in)
192849.8 mm (2.0 in)
192917.3 mm (0.7 in)
193039.9 mm (1.6 in)
193129.0 mm (1.1 in)
193218.8 mm (0.7 in)
193327.9 mm (1.1 in)
193431.8 mm (1.3 in)
193546.5 mm (1.8 in)
193632.8 mm (1.3 in)
194124.9 mm (1.0 in)
194219.8 mm (0.8 in)
194379.2 mm (3.1 in)
194429.0 mm (1.1 in)
194517.8 mm (0.7 in)
194623.9 mm (0.9 in)
194733.8 mm (1.3 in)
194849.8 mm (2.0 in)
194924.9 mm (1.0 in)
195038.9 mm (1.5 in)
195149.8 mm (2.0 in)
1952134.9 mm (5.3 in)
195342.9 mm (1.7 in)
195421.8 mm (0.9 in)
195535.8 mm (1.4 in)
195621.8 mm (0.9 in)
195726.9 mm (1.1 in)
195869.9 mm (2.8 in)
195931.8 mm (1.3 in)
196017.8 mm (0.7 in)
196153.8 mm (2.1 in)
196245.0 mm (1.8 in)
196337.8 mm (1.5 in)
196419.8 mm (0.8 in)
196524.9 mm (1.0 in)
196815.0 mm (0.6 in)
19690.0 mm (0.00 in)
197047.0 mm (1.9 in)
199140.9 mm (1.6 in)
199235.8 mm (1.4 in)
199337.8 mm (1.5 in)
199417.8 mm (0.7 in)
199525.9 mm (1.0 in)
199689.9 mm (3.5 in)
199721.8 mm (0.9 in)
199852.8 mm (2.1 in)
199931.0 mm (1.2 in)
200045.5 mm (1.8 in)
200531.5 mm (1.2 in)
200653.3 mm (2.1 in)
200765.0 mm (2.6 in)
200826.9 mm (1.1 in)
200942.9 mm (1.7 in)
201043.9 mm (1.7 in)
201133.8 mm (1.3 in)
201228.4 mm (1.1 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Rio Grande (Smn) by year The wettest five days of the year at Rio Grande (Smn), 1922 to 2012. The record is 173.8 mm (6.8 in) in 1996, marked on the chart; the median year is 67.5 mm (2.7 in). 0501001502001940196019802000Record: 173.8 mm (6.8 in) in 1996
The wettest five days of the year at Rio Grande (Smn), 1922 to 2012. The record is 173.8 mm (6.8 in) in 1996, marked on the chart; the median year is 67.5 mm (2.7 in).
Wettest five days (Rx5day) at Rio Grande (Smn) by year
YearWettest five days (Rx5day)
192274.5 mm (2.9 in)
192392.3 mm (3.6 in)
192455.7 mm (2.2 in)
1925149.1 mm (5.9 in)
192672.7 mm (2.9 in)
1927108.2 mm (4.3 in)
192894.5 mm (3.7 in)
192932.6 mm (1.3 in)
193059.2 mm (2.3 in)
193143.2 mm (1.7 in)
193244.7 mm (1.8 in)
193358.9 mm (2.3 in)
193483.3 mm (3.3 in)
1935134.1 mm (5.3 in)
193668.3 mm (2.7 in)
194140.7 mm (1.6 in)
194243.7 mm (1.7 in)
1943102.8 mm (4.0 in)
194467.5 mm (2.7 in)
194531.3 mm (1.2 in)
194641.6 mm (1.6 in)
194769.1 mm (2.7 in)
194864.6 mm (2.5 in)
194949.6 mm (2.0 in)
195095.3 mm (3.8 in)
1951117.4 mm (4.6 in)
1952134.9 mm (5.3 in)
195375.1 mm (3.0 in)
195475.1 mm (3.0 in)
195564.0 mm (2.5 in)
195635.6 mm (1.4 in)
195740.7 mm (1.6 in)
195891.7 mm (3.6 in)
195985.2 mm (3.4 in)
196039.4 mm (1.6 in)
196173.6 mm (2.9 in)
196245.0 mm (1.8 in)
196384.5 mm (3.3 in)
196436.6 mm (1.4 in)
196544.7 mm (1.8 in)
196828.5 mm (1.1 in)
19690.0 mm (0.00 in)
197096.7 mm (3.8 in)
199196.1 mm (3.8 in)
199245.1 mm (1.8 in)
199394.5 mm (3.7 in)
199428.7 mm (1.1 in)
199528.3 mm (1.1 in)
1996173.8 mm (6.8 in)
199747.5 mm (1.9 in)
199870.3 mm (2.8 in)
199955.7 mm (2.2 in)
200084.3 mm (3.3 in)
200547.1 mm (1.9 in)
2006128.6 mm (5.1 in)
2007101.4 mm (4.0 in)
200863.2 mm (2.5 in)
2009114.2 mm (4.5 in)
201093.6 mm (3.7 in)
201159.3 mm (2.3 in)
201239.3 mm (1.5 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Rio Grande (Smn) by year The longest dry spell of the year at Rio Grande (Smn), 1922 to 2012. The record is 191 days in 1960, marked on the chart; the median year is 77 days. 0501001502001940196019802000Record: 191 days in 1960
The longest dry spell of the year at Rio Grande (Smn), 1922 to 2012. The record is 191 days in 1960, marked on the chart; the median year is 77 days.
Longest dry spell (CDD) at Rio Grande (Smn) by year
YearLongest dry spell (CDD)
192275 days
192358 days
1924152 days
192577 days
192652 days
1927112 days
1928142 days
192990 days
193075 days
193154 days
1932123 days
1933115 days
193453 days
193566 days
193691 days
194123 days
194258 days
1943110 days
194443 days
194593 days
194664 days
194760 days
1948102 days
194995 days
1950129 days
195172 days
195295 days
195352 days
1954144 days
1955181 days
1956137 days
1957133 days
195870 days
195956 days
1960191 days
196181 days
196271 days
196391 days
196477 days
196597 days
196862 days
196931 days
197048 days
199190 days
199286 days
199399 days
199453 days
1995136 days
199670 days
199736 days
1998127 days
1999146 days
200066 days
200568 days
2006107 days
200770 days
200876 days
200958 days
201096 days
2011124 days
201265 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.

Frost Dates and Growing Season

35 years with a frost

Across 35 years with a frost, the median last spring frost at Rio Grande (Smn) falls on 14 March and the median first autumn frost on 21 November, which leaves a median of 252 days between them.

Fitted over all years, the growing season changes by +2.6 days per decade at this station.

Frost dates and growing season at Rio Grande (Smn)
MeasureMedian, all yearsEarliest periodRecent period (1928 to 2012)Recent against earliestFitted trend
Last spring frost14 Marchn/a7 Marchn/a-3.0 days per decade
First autumn frost21 Novembern/a21 Novembern/a-0.4 days per decade
Growing days252 daysn/a254 daysn/a+2.6 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

50 years, 1923 to 2012

A day with at least 35.3 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 122.3 mm (4.8 in) of rain is expected about once in 100 years.

Rainfall return levels at Rio Grande (Smn): the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years35.3 mm (1.4 in)
5 years52.4 mm (2.1 in)
10 years65.9 mm (2.6 in)
25 years85.8 mm (3.4 in)
50 years103.0 mm (4.1 in)
100 years122.3 mm (4.8 in)Longer than the 50 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, 50 years of values from 1923 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: 134.9 mm (5.3 in) in 1952; 89.9 mm (3.5 in) in 1996; 79.8 mm (3.1 in) in 1927.

Download the Data

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