San Luis Potosi (Smn) Weather Records (MXN00024111)
Record envelope, standing records and threshold days for San Luis Potosi (Smn) (MXN00024111), Mexico, with 46 years of record.
Key Facts for San Luis Potosi (Smn)
- San Luis Potosi (Smn) (MXN00024111) is a weather station in Mexico at 22.13 latitude and -100.97 longitude, 1,871 m (6,138 ft) above sea level.
- The station reports from 1966 to 2011, 46 years of record.
- 1,464 records set at San Luis Potosi (Smn) still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- San Luis Potosi (Smn) set a monthly record daily precipitation of 52.6 mm (2.1 in) on 22 June 2011.
About the Station
- Location: Mexico, 22.13 latitude, -100.97 longitude.
- Elevation: 1,871 m (6,138 ft).
- Period of record: 1966 to 2011, 46 years.
- Eligible elements: tmax, tmin, prcp.
Daily Record Envelope and 2026
0 days at or beyond a record| Month | Highest record high | Lowest record low | 2026 highest maximum | 2026 lowest minimum |
|---|---|---|---|---|
| Jan | 28.9 C (84.0 F) | -8.3 C (17.1 F) | n/a | n/a |
| Feb | 31.7 C (89.1 F) | -5.0 C (23.0 F) | n/a | n/a |
| Mar | 33.9 C (93.0 F) | -5.6 C (21.9 F) | n/a | n/a |
| Apr | 36.1 C (97.0 F) | 1.1 C (34.0 F) | n/a | n/a |
| May | 37.8 C (100.0 F) | 3.3 C (37.9 F) | n/a | n/a |
| Jun | 36.7 C (98.1 F) | 6.7 C (44.1 F) | n/a | n/a |
| Jul | 34.4 C (93.9 F) | 6.1 C (43.0 F) | n/a | n/a |
| Aug | 33.9 C (93.0 F) | 5.6 C (42.1 F) | n/a | n/a |
| Sep | 31.7 C (89.1 F) | 1.7 C (35.1 F) | n/a | n/a |
| Oct | 32.8 C (91.0 F) | -2.2 C (28.0 F) | n/a | n/a |
| Nov | 33.9 C (93.0 F) | -6.1 C (21.0 F) | n/a | n/a |
| Dec | 32.8 C (91.0 F) | -8.9 C (16.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1966 | 46 |
| 1967 | 88 |
| 1968 | 79 |
| 1969 | 126 |
| 1970 | 58 |
| 1979 | 39 |
| 1980 | 36 |
| 1981 | 41 |
| 1982 | 23 |
| 1983 | 39 |
| 1989 | 30 |
| 1990 | 25 |
| 1991 | 59 |
| 1992 | 43 |
| 1993 | 31 |
| 1994 | 29 |
| 1995 | 33 |
| 1996 | 45 |
| 1997 | 85 |
| 1998 | 61 |
| 1999 | 47 |
| 2000 | 31 |
| 2001 | 39 |
| 2002 | 29 |
| 2003 | 26 |
| 2004 | 30 |
| 2005 | 25 |
| 2006 | 29 |
| 2007 | 19 |
| 2008 | 43 |
| 2009 | 38 |
| 2010 | 57 |
| 2011 | 35 |
Wettest Day of Each Month
Dec: 107.7 mm (4.2 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 36.1 mm (1.4 in) | 12 January 2002 |
| Feb | 28.7 mm (1.1 in) | 25 February 2005 |
| Mar | 28.4 mm (1.1 in) | 19 March 1997 |
| Apr | 16.3 mm (0.6 in) | 1 April 2007 |
| May | 70.1 mm (2.8 in) | 31 May 2003 |
| Jun | 52.6 mm (2.1 in) | 22 June 2011 |
| Jul | 76.5 mm (3.0 in) | 12 July 1994 |
| Aug | 44.2 mm (1.7 in) | 11 August 1995 |
| Sep | 52.3 mm (2.1 in) | 20 September 1993 |
| Oct | 58.9 mm (2.3 in) | 15 October 1967 |
| Nov | 24.1 mm (0.9 in) | 11 November 2006 |
| Dec | 107.7 mm (4.2 in) | 4 December 1979 |
Period of Record Coverage
1966 to 2011| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1966 | 304 | 83% | No |
| 1967 | 335 | 92% | Yes |
| 1968 | 336 | 92% | Yes |
| 1969 | 359 | 98% | Yes |
| 1970 | 362 | 99% | Yes |
| 1979 | 264 | 72% | No |
| 1980 | 304 | 83% | No |
| 1981 | 334 | 92% | Yes |
| 1982 | 362 | 99% | Yes |
| 1983 | 365 | 100% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 365 | 100% | Yes |
| 1993 | 361 | 99% | Yes |
| 1994 | 364 | 100% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 366 | 100% | Yes |
| 1997 | 365 | 100% | Yes |
| 1998 | 365 | 100% | Yes |
| 1999 | 365 | 100% | Yes |
| 2000 | 366 | 100% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 360 | 99% | Yes |
| 2003 | 356 | 98% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 180 | 49% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 22 June 2011 | San Luis Potosi (Smn), MX | monthly rain | 52.6 mm (2.1 in) | 4.6 mm (0.18 in) | 16 years | 23 of 100 (Routine) |
| 21 June 2011 | San Luis Potosi (Smn), MX | daily high max | 33.9 C (93.0 F) | 0.6 C (1.1 F) | 41 years | 17 of 100 (Routine) |
| 12 June 2011 | San Luis Potosi (Smn), MX | daily low min (Tie) | 8.9 C (48.0 F) | tie | 14 years | 2 of 100 (Routine) |
| 8 June 2011 | San Luis Potosi (Smn), MX | daily low min | 9.4 C (48.9 F) | 0.6 C (1.1 F) | 14 years | 10 of 100 (Routine) |
| 7 June 2011 | San Luis Potosi (Smn), MX | daily low min | 7.8 C (46.0 F) | 1.1 C (2.0 F) | 1 year | 9 of 100 (Routine) |
| 3 June 2011 | San Luis Potosi (Smn), MX | monthly low min (Tie) | 6.7 C (44.1 F) | tie | 18 years | 4 of 100 (Routine) |
| 2 June 2011 | San Luis Potosi (Smn), MX | daily low min | 7.2 C (45.0 F) | 0.6 C (1.1 F) | 2 years | 6 of 100 (Routine) |
| 1 June 2011 | San Luis Potosi (Smn), MX | daily low min (Tie) | 7.8 C (46.0 F) | tie | 4 years | 1 of 100 (Routine) |
| 29 May 2011 | San Luis Potosi (Smn), MX | daily high max | 36.7 C (98.1 F) | 1.7 C (3.1 F) | 20 years | 15 of 100 (Routine) |
| 28 May 2011 | San Luis Potosi (Smn), MX | daily high max | 36.7 C (98.1 F) | 1.1 C (2.0 F) | 20 years | 13 of 100 (Routine) |
| 27 May 2011 | San Luis Potosi (Smn), MX | daily high max | 36.7 C (98.1 F) | 1.7 C (3.1 F) | 20 years | 15 of 100 (Routine) |
| 25 May 2011 | San Luis Potosi (Smn), MX | all-time high max (Tie) | 37.8 C (100.0 F) | tie | 13 years | 6 of 100 (Routine) |
| 24 May 2011 | San Luis Potosi (Smn), MX | daily high max | 36.7 C (98.1 F) | 1.7 C (3.1 F) | 0 years | 9 of 100 (Routine) |
| 23 May 2011 | San Luis Potosi (Smn), MX | daily high max | 36.7 C (98.1 F) | 1.7 C (3.1 F) | 0 years | 9 of 100 (Routine) |
| 22 May 2011 | San Luis Potosi (Smn), MX | daily high max | 36.1 C (97.0 F) | 1.7 C (3.1 F) | 44 years | 22 of 100 (Routine) |
| 21 May 2011 | San Luis Potosi (Smn), MX | daily high max (Tie) | 35.0 C (95.0 F) | tie | 20 years | 2 of 100 (Routine) |
| 20 May 2011 | San Luis Potosi (Smn), MX | daily high max | 35.6 C (96.1 F) | 1.7 C (3.1 F) | 44 years | 22 of 100 (Routine) |
| 19 May 2011 | San Luis Potosi (Smn), MX | daily high max | 35.0 C (95.0 F) | 0.6 C (1.1 F) | 8 years | 7 of 100 (Routine) |
| 18 May 2011 | San Luis Potosi (Smn), MX | daily high max | 35.6 C (96.1 F) | 0.6 C (1.1 F) | 44 years | 18 of 100 (Routine) |
| 17 May 2011 | San Luis Potosi (Smn), MX | daily high max (Tie) | 35.6 C (96.1 F) | tie | 44 years | 4 of 100 (Routine) |
Climate Trend
26 complete years, 1969 to 2010| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1969 | 19.8 C | +2.52 C |
| 1970 | 17.1 C | -0.16 C |
| 1982 | 17.4 C | +0.09 C |
| 1983 | 17.3 C | +0.02 C |
| 1989 | 17.6 C | +0.30 C |
| 1990 | 17.9 C | +0.56 C |
| 1991 | 17.7 C | +0.38 C |
| 1992 | 16.7 C | -0.59 C |
| 1993 | 17.0 C | -0.27 C |
| 1994 | 17.4 C | +0.14 C |
| 1995 | 17.2 C | -0.14 C |
| 1996 | 16.6 C | -0.70 C |
| 1997 | 17.2 C | -0.11 C |
| 1998 | 18.4 C | +1.11 C |
| 1999 | 17.0 C | -0.33 C |
| 2000 | 16.9 C | -0.39 C |
| 2001 | 16.6 C | -0.73 C |
| 2002 | 16.9 C | -0.45 C |
| 2003 | 17.5 C | +0.15 C |
| 2004 | 17.0 C | -0.35 C |
| 2005 | 17.1 C | -0.19 C |
| 2006 | 17.4 C | +0.07 C |
| 2007 | 17.2 C | -0.13 C |
| 2008 | 16.7 C | -0.59 C |
| 2009 | 17.6 C | +0.31 C |
| 2010 | 16.7 C | -0.62 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
1966 to 2011| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 37.8 C (100.0 F) | 1998 | 35.0 C (95.0 F) | 33 |
| Coldest night (TNn) | -8.9 C (16.0 F) | 1997 | -3.3 C (26.1 F) | 33 |
| Wettest day (Rx1day) | 107.7 mm (4.2 in) | 1979 | 41.4 mm (1.6 in) | 33 |
| Wettest five days (Rx5day) | 168.5 mm (6.6 in) | 1979 | 67.3 mm (2.6 in) | 33 |
| Longest dry spell (CDD) | 117 days | 2000 | 62 days | 33 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1966 | 35.6 C (96.1 F) |
| 1967 | 36.7 C (98.1 F) |
| 1968 | 36.1 C (97.0 F) |
| 1969 | 36.7 C (98.1 F) |
| 1970 | 35.0 C (95.0 F) |
| 1979 | 33.9 C (93.0 F) |
| 1980 | 33.9 C (93.0 F) |
| 1981 | 32.2 C (90.0 F) |
| 1982 | 33.9 C (93.0 F) |
| 1983 | 36.1 C (97.0 F) |
| 1989 | 35.0 C (95.0 F) |
| 1990 | 35.6 C (96.1 F) |
| 1991 | 35.0 C (95.0 F) |
| 1992 | 32.8 C (91.0 F) |
| 1993 | 33.9 C (93.0 F) |
| 1994 | 34.4 C (93.9 F) |
| 1995 | 35.0 C (95.0 F) |
| 1996 | 35.0 C (95.0 F) |
| 1997 | 33.9 C (93.0 F) |
| 1998 | 37.8 C (100.0 F) |
| 1999 | 35.6 C (96.1 F) |
| 2000 | 33.9 C (93.0 F) |
| 2001 | 33.9 C (93.0 F) |
| 2002 | 34.4 C (93.9 F) |
| 2003 | 37.2 C (99.0 F) |
| 2004 | 34.4 C (93.9 F) |
| 2005 | 36.1 C (97.0 F) |
| 2006 | 35.0 C (95.0 F) |
| 2007 | 33.9 C (93.0 F) |
| 2008 | 35.0 C (95.0 F) |
| 2009 | 36.7 C (98.1 F) |
| 2010 | 35.6 C (96.1 F) |
| 2011 | 37.8 C (100.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1966 | -2.2 C (28.0 F) |
| 1967 | -1.1 C (30.0 F) |
| 1968 | 1.7 C (35.1 F) |
| 1969 | 0.0 C (32.0 F) |
| 1970 | -5.0 C (23.0 F) |
| 1979 | -2.2 C (28.0 F) |
| 1980 | -1.1 C (30.0 F) |
| 1981 | -1.7 C (28.9 F) |
| 1982 | -2.2 C (28.0 F) |
| 1983 | -4.4 C (24.1 F) |
| 1989 | -3.3 C (26.1 F) |
| 1990 | -2.8 C (27.0 F) |
| 1991 | -1.7 C (28.9 F) |
| 1992 | -3.3 C (26.1 F) |
| 1993 | -3.9 C (25.0 F) |
| 1994 | -3.3 C (26.1 F) |
| 1995 | -3.3 C (26.1 F) |
| 1996 | -6.7 C (19.9 F) |
| 1997 | -8.9 C (16.0 F) |
| 1998 | -3.3 C (26.1 F) |
| 1999 | -5.0 C (23.0 F) |
| 2000 | -6.1 C (21.0 F) |
| 2001 | -4.4 C (24.1 F) |
| 2002 | -5.0 C (23.0 F) |
| 2003 | -7.2 C (19.0 F) |
| 2004 | -5.6 C (21.9 F) |
| 2005 | -3.3 C (26.1 F) |
| 2006 | -8.3 C (17.1 F) |
| 2007 | -2.2 C (28.0 F) |
| 2008 | -3.3 C (26.1 F) |
| 2009 | -5.0 C (23.0 F) |
| 2010 | -6.1 C (21.0 F) |
| 2011 | -2.8 C (27.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1966 | 35.3 mm (1.4 in) |
| 1967 | 58.9 mm (2.3 in) |
| 1968 | 37.3 mm (1.5 in) |
| 1969 | 30.0 mm (1.2 in) |
| 1970 | 37.8 mm (1.5 in) |
| 1979 | 107.7 mm (4.2 in) |
| 1980 | 28.4 mm (1.1 in) |
| 1981 | 46.0 mm (1.8 in) |
| 1982 | 45.5 mm (1.8 in) |
| 1983 | 61.2 mm (2.4 in) |
| 1989 | 36.3 mm (1.4 in) |
| 1990 | 27.2 mm (1.1 in) |
| 1991 | 61.0 mm (2.4 in) |
| 1992 | 23.4 mm (0.9 in) |
| 1993 | 52.3 mm (2.1 in) |
| 1994 | 76.5 mm (3.0 in) |
| 1995 | 44.2 mm (1.7 in) |
| 1996 | 46.7 mm (1.8 in) |
| 1997 | 29.7 mm (1.2 in) |
| 1998 | 33.5 mm (1.3 in) |
| 1999 | 38.6 mm (1.5 in) |
| 2000 | 25.7 mm (1.0 in) |
| 2001 | 35.3 mm (1.4 in) |
| 2002 | 46.7 mm (1.8 in) |
| 2003 | 70.1 mm (2.8 in) |
| 2004 | 41.1 mm (1.6 in) |
| 2005 | 28.7 mm (1.1 in) |
| 2006 | 41.7 mm (1.6 in) |
| 2007 | 41.7 mm (1.6 in) |
| 2008 | 41.4 mm (1.6 in) |
| 2009 | 40.4 mm (1.6 in) |
| 2010 | 42.7 mm (1.7 in) |
| 2011 | 52.6 mm (2.1 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1966 | 66.0 mm (2.6 in) |
| 1967 | 63.5 mm (2.5 in) |
| 1968 | 58.6 mm (2.3 in) |
| 1969 | 56.4 mm (2.2 in) |
| 1970 | 73.6 mm (2.9 in) |
| 1979 | 168.5 mm (6.6 in) |
| 1980 | 46.7 mm (1.8 in) |
| 1981 | 72.2 mm (2.8 in) |
| 1982 | 64.0 mm (2.5 in) |
| 1983 | 70.3 mm (2.8 in) |
| 1989 | 38.1 mm (1.5 in) |
| 1990 | 39.4 mm (1.6 in) |
| 1991 | 142.5 mm (5.6 in) |
| 1992 | 42.2 mm (1.7 in) |
| 1993 | 68.6 mm (2.7 in) |
| 1994 | 89.2 mm (3.5 in) |
| 1995 | 135.0 mm (5.3 in) |
| 1996 | 46.7 mm (1.8 in) |
| 1997 | 55.6 mm (2.2 in) |
| 1998 | 71.9 mm (2.8 in) |
| 1999 | 69.1 mm (2.7 in) |
| 2000 | 41.2 mm (1.6 in) |
| 2001 | 58.2 mm (2.3 in) |
| 2002 | 55.3 mm (2.2 in) |
| 2003 | 91.7 mm (3.6 in) |
| 2004 | 97.3 mm (3.8 in) |
| 2005 | 38.1 mm (1.5 in) |
| 2006 | 68.9 mm (2.7 in) |
| 2007 | 76.1 mm (3.0 in) |
| 2008 | 67.3 mm (2.6 in) |
| 2009 | 68.9 mm (2.7 in) |
| 2010 | 95.5 mm (3.8 in) |
| 2011 | 58.0 mm (2.3 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1966 | 50 days |
| 1967 | 46 days |
| 1968 | 37 days |
| 1969 | 91 days |
| 1970 | 105 days |
| 1979 | 53 days |
| 1980 | 53 days |
| 1981 | 33 days |
| 1982 | 57 days |
| 1983 | 109 days |
| 1989 | 62 days |
| 1990 | 45 days |
| 1991 | 96 days |
| 1992 | 29 days |
| 1993 | 82 days |
| 1994 | 87 days |
| 1995 | 81 days |
| 1996 | 48 days |
| 1997 | 51 days |
| 1998 | 101 days |
| 1999 | 79 days |
| 2000 | 117 days |
| 2001 | 54 days |
| 2002 | 53 days |
| 2003 | 66 days |
| 2004 | 51 days |
| 2005 | 68 days |
| 2006 | 49 days |
| 2007 | 41 days |
| 2008 | 97 days |
| 2009 | 77 days |
| 2010 | 97 days |
| 2011 | 72 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
25 years with a frostAcross 25 years with a frost, the median last spring frost at San Luis Potosi (Smn) falls on 27 February and the median first autumn frost on 9 November, which leaves a median of 253 days between them.
Fitted over all years, the growing season changes by -11.1 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1970 to 2010) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 27 February | n/a | 27 February | n/a | +5.0 days per decade |
| First autumn frost | 9 November | n/a | 9 November | n/a | -6.1 days per decade |
| Growing days | 253 days | n/a | 253 days | n/a | -11.1 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
30 years, 1967 to 2010A day with at least 40.6 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 111.9 mm (4.4 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 40.6 mm (1.6 in) | |
| 5 years | 54.7 mm (2.2 in) | |
| 10 years | 65.7 mm (2.6 in) | |
| 25 years | 82.0 mm (3.2 in) | |
| 50 years | 96.1 mm (3.8 in) | Longer than the 30 years of record |
| 100 years | 111.9 mm (4.4 in) | Longer than the 30 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, 30 years of values from 1967 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: 107.7 mm (4.2 in) in 1979; 76.5 mm (3.0 in) in 1994; 70.1 mm (2.8 in) in 2003.
Download the Data
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).