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San Juan del Rio Weather Records (MXN00020113)

Record envelope, standing records and threshold days for San Juan del Rio (MXN00020113), Mexico, with 63 years of record.

Key Facts for San Juan del Rio

  • San Juan del Rio (MXN00020113) is a weather station in Mexico at 17.42 latitude and -95.82 longitude, 557 m (1,827 ft) above sea level.
  • The station reports from 1948 to 2010, 63 years of record.
  • 1,464 records set at San Juan del Rio still stand.
  • Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
  • San Juan del Rio tied a daily record low minimum temperature of 10.0 C (50.0 F) on 29 December 2010.

About the Station

  • Location: Mexico, 17.42 latitude, -95.82 longitude.
  • Elevation: 557 m (1,827 ft).
  • Period of record: 1948 to 2010, 63 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 Juan del Rio, with 2026 drawn through them The band shows the record high and record low for each calendar day at San Juan del Rio. 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 San Juan del Rio. 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 Juan del Rio, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan39.4 C (102.9 F)0.6 C (33.1 F)n/an/a
Feb40.0 C (104.0 F)5.0 C (41.0 F)n/an/a
Mar43.3 C (109.9 F)8.9 C (48.0 F)n/an/a
Apr44.4 C (111.9 F)10.0 C (50.0 F)n/an/a
May47.8 C (118.0 F)11.7 C (53.1 F)n/an/a
Jun45.0 C (113.0 F)10.0 C (50.0 F)n/an/a
Jul41.7 C (107.1 F)10.0 C (50.0 F)n/an/a
Aug40.0 C (104.0 F)10.0 C (50.0 F)n/an/a
Sep40.0 C (104.0 F)10.0 C (50.0 F)n/an/a
Oct38.9 C (102.0 F)10.0 C (50.0 F)n/an/a
Nov38.9 C (102.0 F)7.8 C (46.0 F)n/an/a
Dec38.3 C (100.9 F)5.6 C (42.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at San Juan del Rio by the year they were set 1,464 records at San Juan del Rio still stand. 2006 holds the most, with 99. 02550751001948: 191950: 261951: 791952: 351953: 251954: 601955: 251956: 491957: 231958: 331959: 231960: 321961: 251962: 341963: 61964: 91965: 381966: 131967: 101968: 401969: 51970: 181971: 41972: 51973: 231974: 91975: 211976: 151977: 211978: 281979: 181980: 181981: 81982: 31983: 111984: 251991: 161992: 61993: 401995: 111996: 341997: 312000: 442001: 422002: 172003: 202004: 162005: 492006: 992007: 92008: 632009: 772010: 54194819551961196719731979199120002006
1,464 records at San Juan del Rio still stand. 2006 holds the most, with 99.
Standing records at San Juan del Rio by the year they were set
Year setStanding records
194819
195026
195179
195235
195325
195460
195525
195649
195723
195833
195923
196032
196125
196234
19636
19649
196538
196613
196710
196840
19695
197018
19714
19725
197323
19749
197521
197615
197721
197828
197918
198018
19818
19823
198311
198425
199116
19926
199340
199511
199634
199731
200044
200142
200217
200320
200416
200549
200699
20079
200863
200977
201054

Wettest Day of Each Month

Sep: 239.8 mm (9.4 in)
Record daily precipitation for each month at San Juan del Rio The wettest day on record for each calendar month at San Juan del Rio. The most was 239.8 mm (9.4 in) on 4 September 1976. 0100200300 Jan: 81.8 mm (3.2 in), 25 January 1951 Jan Feb: 132.8 mm (5.2 in), 6 February 1975 Feb Mar: 88.4 mm (3.5 in), 1 March 1982 Mar Apr: 86.9 mm (3.4 in), 5 April 1952 Apr May: 129.3 mm (5.1 in), 12 May 1973 May Jun: 186.4 mm (7.3 in), 25 June 1966 Jun Jul: 169.9 mm (6.7 in), 11 July 1958 Jul Aug: 179.8 mm (7.1 in), 29 August 1960 Aug Sep: 239.8 mm (9.4 in), 4 September 1976 Sep Oct: 199.9 mm (7.9 in), 18 October 1966 Oct Nov: 96.8 mm (3.8 in), 14 November 1948 Nov Dec: 130.6 mm (5.1 in), 25 December 1983 Dec
The wettest day on record for each calendar month at San Juan del Rio. The most was 239.8 mm (9.4 in) on 4 September 1976.
Record daily precipitation for each month at San Juan del Rio
MonthRecord daily precipitation (mm)Date
Jan81.8 mm (3.2 in)25 January 1951
Feb132.8 mm (5.2 in)6 February 1975
Mar88.4 mm (3.5 in)1 March 1982
Apr86.9 mm (3.4 in)5 April 1952
May129.3 mm (5.1 in)12 May 1973
Jun186.4 mm (7.3 in)25 June 1966
Jul169.9 mm (6.7 in)11 July 1958
Aug179.8 mm (7.1 in)29 August 1960
Sep239.8 mm (9.4 in)4 September 1976
Oct199.9 mm (7.9 in)18 October 1966
Nov96.8 mm (3.8 in)14 November 1948
Dec130.6 mm (5.1 in)25 December 1983

Period of Record Coverage

1948 to 2010
Days with data per year at San Juan del Rio 53 years of record at San Juan del Rio, 1948 to 2010. 6 years have data for under 90 percent of days and are left out of rankings: 1948, 1950, 1984, 1992, 1997, 2007. 1948: 91 of 366 days1950: 275 of 365 days1951: 364 of 365 days1952: 366 of 366 days1953: 364 of 365 days1954: 335 of 365 days1955: 363 of 365 days1956: 333 of 366 days1957: 364 of 365 days1958: 364 of 365 days1959: 363 of 365 days1960: 365 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 364 of 366 days1969: 364 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 365 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 366 of 366 days1981: 365 of 365 days1982: 365 of 365 days1983: 365 of 365 days1984: 305 of 366 days1991: 360 of 365 days1992: 91 of 366 days1993: 365 of 365 days1995: 365 of 365 days1996: 366 of 366 days1997: 273 of 365 days2000: 334 of 366 days2001: 363 of 365 days2002: 365 of 365 days2003: 365 of 365 days2004: 366 of 366 days2005: 365 of 365 days2006: 365 of 365 days2007: 180 of 365 days2008: 366 of 366 days2009: 364 of 365 days2010: 364 of 365 days195019601970198020002010
53 years of record at San Juan del Rio, 1948 to 2010. 6 years have data for under 90 percent of days and are left out of rankings: 1948, 1950, 1984, 1992, 1997, 2007.
Days with data per year at San Juan del Rio
YearDays with dataShare of yearComplete
19489125%No
195027575%No
1951364100%Yes
1952366100%Yes
1953364100%Yes
195433592%Yes
195536399%Yes
195633391%Yes
1957364100%Yes
1958364100%Yes
195936399%Yes
1960365100%Yes
1961365100%Yes
1962365100%Yes
1963365100%Yes
1964366100%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
196836499%Yes
1969364100%Yes
1970365100%Yes
1971365100%Yes
1972366100%Yes
1973365100%Yes
1974365100%Yes
1975365100%Yes
1976366100%Yes
1977365100%Yes
1978365100%Yes
1979365100%Yes
1980366100%Yes
1981365100%Yes
1982365100%Yes
1983365100%Yes
198430583%No
199136099%Yes
19929125%No
1993365100%Yes
1995365100%Yes
1996366100%Yes
199727375%No
200033491%Yes
200136399%Yes
2002365100%Yes
2003365100%Yes
2004366100%Yes
2005365100%Yes
2006365100%Yes
200718049%No
2008366100%Yes
2009364100%Yes
2010364100%Yes

Latest Records

20
Latest records at San Juan del Rio
DateStationRecordValueBeat old record byOld record stoodSignificance
29 December 2010San Juan del Rio, MXdaily low min (Tie)10.0 C (50.0 F)tie0 years1 of 100 (Routine)
26 December 2010San Juan del Rio, MXdaily rain30.2 mm (1.2 in)9.4 mm (0.37 in)53 years29 of 100 (Routine)
23 December 2010San Juan del Rio, MXdaily high max36.1 C (97.0 F)0.5 C (0.9 F)16 years12 of 100 (Routine)
15 December 2010San Juan del Rio, MXdaily high max (Tie)36.1 C (97.0 F)tie8 years2 of 100 (Routine)
12 December 2010San Juan del Rio, MXdaily high max36.1 C (97.0 F)0.5 C (0.9 F)13 years11 of 100 (Routine)
11 December 2010San Juan del Rio, MXdaily rain30.0 mm (1.2 in)1.8 mm (0.07 in)28 years15 of 100 (Routine)
5 December 2010San Juan del Rio, MXdaily low min (Tie)10.0 C (50.0 F)tie0 years1 of 100 (Routine)
4 December 2010San Juan del Rio, MXdaily high max (Tie)37.8 C (100.0 F)tie16 years2 of 100 (Routine)
29 November 2010San Juan del Rio, MXdaily low min10.0 C (50.0 F)0.6 C (1.1 F)56 years24 of 100 (Routine)
26 November 2010San Juan del Rio, MXdaily high max36.1 C (97.0 F)0.5 C (0.9 F)8 years9 of 100 (Routine)
18 November 2010San Juan del Rio, MXdaily high max36.7 C (98.1 F)1.1 C (2.0 F)45 years22 of 100 (Routine)
15 November 2010San Juan del Rio, MXdaily high max (Tie)36.1 C (97.0 F)tie8 years2 of 100 (Routine)
8 November 2010San Juan del Rio, MXdaily low min (Tie)10.0 C (50.0 F)tie60 years6 of 100 (Routine)
28 October 2010San Juan del Rio, MXmonthly low min (Tie)10.0 C (50.0 F)tie2 years4 of 100 (Routine)
26 October 2010San Juan del Rio, MXmonthly low min (Tie)10.0 C (50.0 F)tie2 years4 of 100 (Routine)
21 October 2010San Juan del Rio, MXmonthly low min (Tie)10.0 C (50.0 F)tie1 year4 of 100 (Routine)
18 October 2010San Juan del Rio, MXmonthly low min (Tie)10.0 C (50.0 F)tie1 year4 of 100 (Routine)
15 October 2010San Juan del Rio, MXdaily low min (Tie)11.7 C (53.1 F)tie4 years1 of 100 (Routine)
14 October 2010San Juan del Rio, MXdaily low max24.4 C (75.9 F)0.6 C (1.1 F)32 years16 of 100 (Routine)
11 October 2010San Juan del Rio, MXmonthly low min (Tie)10.0 C (50.0 F)tie1 year4 of 100 (Routine)

Climate Trend

44 complete years, 1951 to 2010
Annual mean temperature at San Juan del Rio as warming stripes, 1951 to 2010 One stripe for each of 44 complete years at San Juan del Rio, 1951 to 2010. Blue stripes are years cooler than the station's own mean of 24.0 C (75.3 F); red stripes are warmer. The coolest year was 2006, at 19.3 C (66.8 F), and the warmest was 1993, at 26.4 C (79.5 F). The strongest colour marks a difference of 4.8 C (8.6 F). 1951: 24.2 C, +0.1 C from the station mean1952: 24.5 C, +0.4 C from the station mean1953: 24.9 C, +0.8 C from the station mean1955: 23.8 C, -0.2 C from the station mean1957: 24.5 C, +0.4 C from the station mean1958: 24.7 C, +0.6 C from the station mean1959: 23.7 C, -0.3 C from the station mean1960: 23.8 C, -0.2 C from the station mean1961: 24.0 C, 0.0 C from the station mean1962: 25.0 C, +0.9 C from the station mean1963: 24.9 C, +0.8 C from the station mean1964: 25.2 C, +1.1 C from the station mean1965: 25.9 C, +1.8 C from the station mean1966: 25.0 C, +1.0 C from the station mean1967: 25.3 C, +1.2 C from the station mean1968: 23.9 C, -0.1 C from the station mean1969: 24.7 C, +0.6 C from the station mean1970: 24.0 C, 0.0 C from the station mean1971: 24.4 C, +0.3 C from the station mean1972: 24.4 C, +0.4 C from the station mean1973: 24.6 C, +0.5 C from the station mean1974: 24.1 C, 0.0 C from the station mean1975: 23.8 C, -0.2 C from the station mean1976: 23.6 C, -0.5 C from the station mean1977: 24.2 C, +0.1 C from the station mean1978: 23.8 C, -0.3 C from the station mean1979: 24.2 C, +0.1 C from the station mean1980: 24.0 C, -0.1 C from the station mean1981: 23.8 C, -0.3 C from the station mean1982: 24.2 C, +0.2 C from the station mean1983: 24.8 C, +0.8 C from the station mean1991: 25.8 C, +1.7 C from the station mean1993: 26.4 C, +2.4 C from the station mean1995: 24.4 C, +0.4 C from the station mean1996: 25.7 C, +1.7 C from the station mean2001: 24.0 C, 0.0 C from the station mean2002: 23.1 C, -1.0 C from the station mean2003: 22.4 C, -1.6 C from the station mean2004: 22.1 C, -1.9 C from the station mean2005: 20.2 C, -3.9 C from the station mean2006: 19.3 C, -4.7 C from the station mean2008: 23.1 C, -0.9 C from the station mean2009: 23.0 C, -1.0 C from the station mean2010: 22.4 C, -1.7 C from the station mean1951195519601965197019751980198519901995200020052010
One stripe for each of 44 complete years at San Juan del Rio, 1951 to 2010. Blue stripes are years cooler than the station's own mean of 24.0 C (75.3 F); red stripes are warmer. The coolest year was 2006, at 19.3 C (66.8 F), and the warmest was 1993, at 26.4 C (79.5 F). The strongest colour marks a difference of 4.8 C (8.6 F).
Annual mean temperature at San Juan del Rio as warming stripes, 1951 to 2010
YearAnnual mean temperatureDifference from the station mean
195124.2 C+0.15 C
195224.5 C+0.45 C
195324.9 C+0.82 C
195523.8 C-0.23 C
195724.5 C+0.42 C
195824.7 C+0.64 C
195923.7 C-0.30 C
196023.8 C-0.22 C
196124.0 C-0.02 C
196225.0 C+0.94 C
196324.9 C+0.82 C
196425.2 C+1.12 C
196525.9 C+1.85 C
196625.0 C+0.98 C
196725.3 C+1.24 C
196823.9 C-0.11 C
196924.7 C+0.65 C
197024.0 C0.00 C
197124.4 C+0.34 C
197224.4 C+0.41 C
197324.6 C+0.52 C
197424.1 C+0.02 C
197523.8 C-0.19 C
197623.6 C-0.47 C
197724.2 C+0.13 C
197823.8 C-0.27 C
197924.2 C+0.14 C
198024.0 C-0.06 C
198123.8 C-0.25 C
198224.2 C+0.16 C
198324.8 C+0.81 C
199125.8 C+1.74 C
199326.4 C+2.38 C
199524.4 C+0.37 C
199625.7 C+1.68 C
200124.0 C+0.01 C
200223.1 C-0.96 C
200322.4 C-1.59 C
200422.1 C-1.90 C
200520.2 C-3.87 C
200619.3 C-4.71 C
200823.1 C-0.91 C
200923.0 C-0.99 C
201022.4 C-1.68 C

The annual mean temperature here has fallen by 0.4 C (0.2 to 0.6) per decade over 1951 to 2010. In Fahrenheit: 0.7 F (0.3 to 1.0) per decade. The slope is a straight line fitted to 44 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at San Juan del Rio
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.4 C (-0.6 to -0.2) per decade-0.7 F (-1.0 to -0.3) per decade1951 to 201044Fall
Mean daily maximum0.1 C (-0.1 to 0.4) per decade0.3 F (-0.2 to 0.8) per decade1951 to 201044Not clearly different from zero
Mean daily minimum-0.9 C (-1.1 to -0.6) per decade-1.6 F (-2.1 to -1.1) per decade1951 to 201044Fall

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

1948 to 2010
Yearly extremes at San Juan del Rio: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)47.8 C (118.0 F)195040.0 C (104.0 F)53
Coldest night (TNn)0.6 C (33.1 F)195110.0 C (50.0 F)53
Wettest day (Rx1day)239.8 mm (9.4 in)1976100.6 mm (4.0 in)52
Wettest five days (Rx5day)458.7 mm (18.1 in)1958228.5 mm (9.0 in)52
Longest dry spell (CDD)72 days196430 days52

Hottest day (TXx)

Hottest day (TXx) at San Juan del Rio by year The hottest day of the year at San Juan del Rio, 1948 to 2010. The record is 47.8 C (118.0 F) in 1950, marked on the chart; the median year is 40.0 C (104.0 F). 253035404550196019802000Record: 47.8 C (118.0 F) in 1950
The hottest day of the year at San Juan del Rio, 1948 to 2010. The record is 47.8 C (118.0 F) in 1950, marked on the chart; the median year is 40.0 C (104.0 F).
Hottest day (TXx) at San Juan del Rio by year
YearHottest day (TXx)
194835.6 C (96.1 F)
195047.8 C (118.0 F)
195138.9 C (102.0 F)
195240.0 C (104.0 F)
195341.7 C (107.1 F)
195440.6 C (105.1 F)
195541.7 C (107.1 F)
195641.7 C (107.1 F)
195741.7 C (107.1 F)
195842.8 C (109.0 F)
195938.9 C (102.0 F)
196045.0 C (113.0 F)
196141.7 C (107.1 F)
196240.0 C (104.0 F)
196340.6 C (105.1 F)
196440.0 C (104.0 F)
196541.7 C (107.1 F)
196638.9 C (102.0 F)
196740.0 C (104.0 F)
196841.7 C (107.1 F)
196940.0 C (104.0 F)
197041.7 C (107.1 F)
197138.9 C (102.0 F)
197240.0 C (104.0 F)
197341.1 C (106.0 F)
197439.4 C (102.9 F)
197540.0 C (104.0 F)
197638.9 C (102.0 F)
197738.3 C (100.9 F)
197840.6 C (105.1 F)
197940.6 C (105.1 F)
198040.0 C (104.0 F)
198140.0 C (104.0 F)
198238.3 C (100.9 F)
198341.1 C (106.0 F)
198442.2 C (108.0 F)
199140.0 C (104.0 F)
199240.0 C (104.0 F)
199339.4 C (102.9 F)
199540.0 C (104.0 F)
199640.0 C (104.0 F)
199740.0 C (104.0 F)
200040.0 C (104.0 F)
200140.0 C (104.0 F)
200238.3 C (100.9 F)
200338.3 C (100.9 F)
200440.0 C (104.0 F)
200536.1 C (97.0 F)
200629.4 C (84.9 F)
200740.0 C (104.0 F)
200844.4 C (111.9 F)
200944.4 C (111.9 F)
201042.2 C (108.0 F)

Coldest night (TNn)

Coldest night (TNn) at San Juan del Rio by year The coldest night of the year at San Juan del Rio, 1948 to 2010. The record is 0.6 C (33.1 F) in 1951, marked on the chart; the median year is 10.0 C (50.0 F). 05101520196019802000Record: 0.6 C (33.1 F) in 1951
The coldest night of the year at San Juan del Rio, 1948 to 2010. The record is 0.6 C (33.1 F) in 1951, marked on the chart; the median year is 10.0 C (50.0 F).
Coldest night (TNn) at San Juan del Rio by year
YearColdest night (TNn)
194811.7 C (53.1 F)
19506.7 C (44.1 F)
19510.6 C (33.1 F)
195210.6 C (51.1 F)
195310.0 C (50.0 F)
19545.6 C (42.1 F)
19556.7 C (44.1 F)
19560.6 C (33.1 F)
19577.8 C (46.0 F)
19586.7 C (44.1 F)
19597.8 C (46.0 F)
196010.0 C (50.0 F)
196110.0 C (50.0 F)
196210.0 C (50.0 F)
196310.0 C (50.0 F)
196411.1 C (52.0 F)
196510.6 C (51.1 F)
196610.6 C (51.1 F)
19678.9 C (48.0 F)
19688.9 C (48.0 F)
196910.0 C (50.0 F)
19707.8 C (46.0 F)
19718.9 C (48.0 F)
197210.6 C (51.1 F)
19739.4 C (48.9 F)
197411.7 C (53.1 F)
197510.6 C (51.1 F)
197610.6 C (51.1 F)
197710.6 C (51.1 F)
197810.0 C (50.0 F)
197910.0 C (50.0 F)
198010.6 C (51.1 F)
198110.0 C (50.0 F)
198210.6 C (51.1 F)
198311.1 C (52.0 F)
198411.1 C (52.0 F)
199111.7 C (53.1 F)
199215.6 C (60.1 F)
199316.7 C (62.1 F)
199512.8 C (55.0 F)
199610.0 C (50.0 F)
199712.8 C (55.0 F)
200011.7 C (53.1 F)
200111.7 C (53.1 F)
200211.7 C (53.1 F)
200311.7 C (53.1 F)
200410.6 C (51.1 F)
200510.0 C (50.0 F)
200611.7 C (53.1 F)
200710.0 C (50.0 F)
200810.0 C (50.0 F)
200910.0 C (50.0 F)
201010.0 C (50.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at San Juan del Rio by year The wettest day of the year at San Juan del Rio, 1948 to 2010. The record is 239.8 mm (9.4 in) in 1976, marked on the chart; the median year is 100.6 mm (4.0 in). 0100200300196019802000Record: 239.8 mm (9.4 in) in 1976
The wettest day of the year at San Juan del Rio, 1948 to 2010. The record is 239.8 mm (9.4 in) in 1976, marked on the chart; the median year is 100.6 mm (4.0 in).
Wettest day (Rx1day) at San Juan del Rio by year
YearWettest day (Rx1day)
194896.8 mm (3.8 in)
1950170.9 mm (6.7 in)
195199.8 mm (3.9 in)
195286.9 mm (3.4 in)
195346.0 mm (1.8 in)
1954140.0 mm (5.5 in)
1955146.8 mm (5.8 in)
1956101.9 mm (4.0 in)
1957150.9 mm (5.9 in)
1958169.9 mm (6.7 in)
1959104.9 mm (4.1 in)
1960179.8 mm (7.1 in)
1961169.9 mm (6.7 in)
1962100.3 mm (3.9 in)
1963159.8 mm (6.3 in)
1964119.4 mm (4.7 in)
1965119.9 mm (4.7 in)
1966199.9 mm (7.9 in)
1967120.1 mm (4.7 in)
1968114.3 mm (4.5 in)
1969113.3 mm (4.5 in)
197069.3 mm (2.7 in)
197159.9 mm (2.4 in)
197289.9 mm (3.5 in)
1973129.3 mm (5.1 in)
1974158.0 mm (6.2 in)
1975132.8 mm (5.2 in)
1976239.8 mm (9.4 in)
1977119.9 mm (4.7 in)
197899.8 mm (3.9 in)
1979110.2 mm (4.3 in)
198059.9 mm (2.4 in)
1981106.9 mm (4.2 in)
198288.4 mm (3.5 in)
1983140.0 mm (5.5 in)
198488.6 mm (3.5 in)
199179.8 mm (3.1 in)
199230.0 mm (1.2 in)
1993n/a
199539.9 mm (1.6 in)
1996100.8 mm (4.0 in)
199740.4 mm (1.6 in)
200080.3 mm (3.2 in)
200180.0 mm (3.1 in)
200260.2 mm (2.4 in)
200340.4 mm (1.6 in)
200498.3 mm (3.9 in)
200560.2 mm (2.4 in)
200650.3 mm (2.0 in)
200740.4 mm (1.6 in)
2008101.9 mm (4.0 in)
200980.3 mm (3.2 in)
201080.0 mm (3.1 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at San Juan del Rio by year The wettest five days of the year at San Juan del Rio, 1948 to 2010. The record is 458.7 mm (18.1 in) in 1958, marked on the chart; the median year is 228.5 mm (9.0 in). 0100200300400500196019802000Record: 458.7 mm (18.1 in) in 1958
The wettest five days of the year at San Juan del Rio, 1948 to 2010. The record is 458.7 mm (18.1 in) in 1958, marked on the chart; the median year is 228.5 mm (9.0 in).
Wettest five days (Rx5day) at San Juan del Rio by year
YearWettest five days (Rx5day)
1948209.6 mm (8.3 in)
1950282.7 mm (11.1 in)
1951228.6 mm (9.0 in)
1952225.6 mm (8.9 in)
1953116.8 mm (4.6 in)
1954380.2 mm (15.0 in)
1955367.9 mm (14.5 in)
1956172.0 mm (6.8 in)
1957236.5 mm (9.3 in)
1958458.7 mm (18.1 in)
1959198.7 mm (7.8 in)
1960426.5 mm (16.8 in)
1961354.2 mm (13.9 in)
1962173.2 mm (6.8 in)
1963284.7 mm (11.2 in)
1964231.7 mm (9.1 in)
1965354.8 mm (14.0 in)
1966428.2 mm (16.9 in)
1967236.7 mm (9.3 in)
1968338.1 mm (13.3 in)
1969370.4 mm (14.6 in)
1970228.4 mm (9.0 in)
1971220.5 mm (8.7 in)
1972212.7 mm (8.4 in)
1973235.2 mm (9.3 in)
1974363.2 mm (14.3 in)
1975215.1 mm (8.5 in)
1976365.6 mm (14.4 in)
1977250.2 mm (9.9 in)
1978280.9 mm (11.1 in)
1979229.1 mm (9.0 in)
1980127.5 mm (5.0 in)
1981241.1 mm (9.5 in)
1982220.9 mm (8.7 in)
1983259.7 mm (10.2 in)
1984223.7 mm (8.8 in)
1991289.3 mm (11.4 in)
199259.7 mm (2.4 in)
1993n/a
1995139.5 mm (5.5 in)
1996252.0 mm (9.9 in)
1997160.3 mm (6.3 in)
2000180.3 mm (7.1 in)
2001220.2 mm (8.7 in)
2002160.5 mm (6.3 in)
200390.5 mm (3.6 in)
2004172.2 mm (6.8 in)
2005180.8 mm (7.1 in)
2006120.4 mm (4.7 in)
200780.3 mm (3.2 in)
2008210.6 mm (8.3 in)
2009170.7 mm (6.7 in)
2010230.6 mm (9.1 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at San Juan del Rio by year The longest dry spell of the year at San Juan del Rio, 1948 to 2010. The record is 72 days in 1964, marked on the chart; the median year is 30 days. 020406080196019802000Record: 72 days in 1964
The longest dry spell of the year at San Juan del Rio, 1948 to 2010. The record is 72 days in 1964, marked on the chart; the median year is 30 days.
Longest dry spell (CDD) at San Juan del Rio by year
YearLongest dry spell (CDD)
19484 days
195029 days
195130 days
195220 days
195324 days
195414 days
195537 days
195616 days
195726 days
195848 days
195936 days
196031 days
196135 days
196236 days
196326 days
196472 days
196541 days
196632 days
196724 days
196825 days
196919 days
197022 days
197133 days
197241 days
197333 days
197432 days
197538 days
197635 days
197729 days
197830 days
197929 days
198037 days
198123 days
198229 days
198343 days
198424 days
199119 days
199212 days
1993n/a
199545 days
199648 days
199725 days
200053 days
200136 days
200268 days
200367 days
200428 days
200522 days
200655 days
200729 days
200841 days
200924 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

45 years, 1951 to 2010

A day with at least 104.1 mm (4.1 in) of rain is expected about once in 2 years. A day with at least 234.0 mm (9.2 in) of rain is expected about once in 100 years.

Rainfall return levels at San Juan del Rio: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years104.1 mm (4.1 in)
5 years143.5 mm (5.6 in)
10 years167.6 mm (6.6 in)
25 years196.0 mm (7.7 in)
50 years215.6 mm (8.5 in)Longer than the 45 years of record
100 years234.0 mm (9.2 in)Longer than the 45 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, 45 years of values from 1951 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: 239.8 mm (9.4 in) in 1976; 199.9 mm (7.9 in) in 1966; 179.8 mm (7.1 in) in 1960.

Download the Data

  • Data for San Juan del Rio standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for San Juan del Rio 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).