San Antonio Las Alazanas (Smn Weather Records (MXN00005049)
Record envelope, standing records and threshold days for San Antonio Las Alazanas (Smn (MXN00005049), Mexico, with 65 years of record.
Key Facts for San Antonio Las Alazanas (Smn
- San Antonio Las Alazanas (Smn (MXN00005049) is a weather station in Mexico at 25.28 latitude and -100.62 longitude, 2,300 m (7,545 ft) above sea level.
- The station reports from 1947 to 2011, 65 years of record.
- 1,460 records set at San Antonio Las Alazanas (Smn still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- San Antonio Las Alazanas (Smn set a daily record low maximum temperature of 10.6 C (51.1 F) on 11 November 2011.
About the Station
- Location: Mexico, 25.28 latitude, -100.62 longitude.
- Elevation: 2,300 m (7,545 ft).
- Period of record: 1947 to 2011, 65 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 | 30.6 C (87.1 F) | -9.4 C (15.1 F) | n/a | n/a |
| Feb | 30.6 C (87.1 F) | -10.0 C (14.0 F) | n/a | n/a |
| Mar | 31.7 C (89.1 F) | -8.3 C (17.1 F) | n/a | n/a |
| Apr | 38.9 C (102.0 F) | -5.0 C (23.0 F) | n/a | n/a |
| May | 40.0 C (104.0 F) | 0.0 C (32.0 F) | n/a | n/a |
| Jun | 41.7 C (107.1 F) | 0.0 C (32.0 F) | n/a | n/a |
| Jul | 37.8 C (100.0 F) | 0.0 C (32.0 F) | n/a | n/a |
| Aug | 40.0 C (104.0 F) | 0.0 C (32.0 F) | n/a | n/a |
| Sep | 38.9 C (102.0 F) | -8.3 C (17.1 F) | n/a | n/a |
| Oct | 35.6 C (96.1 F) | -6.1 C (21.0 F) | n/a | n/a |
| Nov | 33.9 C (93.0 F) | -6.1 C (21.0 F) | n/a | n/a |
| Dec | 35.6 C (96.1 F) | -14.4 C (6.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,460 standing records| Year set | Standing records |
|---|---|
| 1967 | 50 |
| 1968 | 35 |
| 1969 | 12 |
| 1970 | 59 |
| 1971 | 14 |
| 1972 | 27 |
| 1973 | 89 |
| 1974 | 137 |
| 1975 | 68 |
| 1976 | 55 |
| 1977 | 75 |
| 1978 | 24 |
| 1979 | 8 |
| 1980 | 3 |
| 1981 | 13 |
| 1982 | 77 |
| 1983 | 67 |
| 1984 | 14 |
| 1985 | 8 |
| 1986 | 3 |
| 1987 | 16 |
| 1988 | 35 |
| 1989 | 32 |
| 1990 | 23 |
| 1991 | 22 |
| 1992 | 28 |
| 1993 | 13 |
| 1994 | 11 |
| 1995 | 17 |
| 1996 | 32 |
| 1997 | 34 |
| 1998 | 37 |
| 1999 | 40 |
| 2000 | 14 |
| 2001 | 9 |
| 2002 | 18 |
| 2003 | 18 |
| 2004 | 13 |
| 2005 | 10 |
| 2006 | 8 |
| 2007 | 10 |
| 2008 | 26 |
| 2009 | 13 |
| 2010 | 89 |
| 2011 | 54 |
All-Time Record Progression
6 new records| Date | Kind | Detail |
|---|---|---|
| 1988-09-16 | Record daily precipitation | Record daily precipitation 119.9 mm (4.7 in) |
| 2010-04-02 | Record high maximum temperature | Record high maximum temperature 36.7 C (98.1 F) |
| 2010-04-06 | Record high maximum temperature | Record high maximum temperature 37.8 C (100.0 F) |
| 2010-04-07 | Record high maximum temperature | Record high maximum temperature 38.9 C (102.0 F) |
| 2011-05-19 | Record high maximum temperature | Record high maximum temperature 40.0 C (104.0 F) |
| 2011-06-05 | Record high maximum temperature | Record high maximum temperature 41.7 C (107.1 F) |
Wettest Day of Each Month
Sep: 119.9 mm (4.7 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 34.8 mm (1.4 in) | 6 January 1959 |
| Feb | 39.9 mm (1.6 in) | 7 February 2003 |
| Mar | 34.8 mm (1.4 in) | 18 March 1951 |
| Apr | 77.0 mm (3.0 in) | 21 April 1950 |
| May | 79.8 mm (3.1 in) | 11 May 1994 |
| Jun | 75.9 mm (3.0 in) | 20 June 1948 |
| Jul | 99.8 mm (3.9 in) | 11 July 1969 |
| Aug | 47.8 mm (1.9 in) | 2 August 2000 |
| Sep | 119.9 mm (4.7 in) | 16 September 1988 |
| Oct | 63.0 mm (2.5 in) | 11 October 2003 |
| Nov | 81.8 mm (3.2 in) | 16 November 1976 |
| Dec | 31.8 mm (1.3 in) | 3 December 1989 |
Period of Record Coverage
1954 to 2011| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1954 | 1 | 0% | No |
| 1967 | 345 | 95% | Yes |
| 1968 | 345 | 94% | Yes |
| 1969 | 347 | 95% | Yes |
| 1970 | 351 | 96% | Yes |
| 1971 | 349 | 96% | Yes |
| 1972 | 141 | 39% | No |
| 1973 | 131 | 36% | No |
| 1974 | 352 | 96% | Yes |
| 1975 | 353 | 97% | Yes |
| 1976 | 355 | 97% | Yes |
| 1977 | 353 | 97% | Yes |
| 1978 | 326 | 89% | No |
| 1979 | 350 | 96% | Yes |
| 1980 | 353 | 96% | Yes |
| 1981 | 324 | 89% | No |
| 1982 | 152 | 42% | No |
| 1983 | 142 | 39% | No |
| 1984 | 348 | 95% | Yes |
| 1985 | 353 | 97% | Yes |
| 1986 | 351 | 96% | Yes |
| 1987 | 353 | 97% | Yes |
| 1988 | 289 | 79% | No |
| 1989 | 294 | 81% | No |
| 1990 | 269 | 74% | No |
| 1991 | 237 | 65% | No |
| 1992 | 201 | 55% | No |
| 1993 | 128 | 35% | No |
| 1994 | 352 | 96% | Yes |
| 1995 | 353 | 97% | Yes |
| 1996 | 347 | 95% | Yes |
| 1997 | 352 | 96% | Yes |
| 1998 | 352 | 96% | Yes |
| 1999 | 345 | 95% | Yes |
| 2000 | 354 | 97% | Yes |
| 2001 | 324 | 89% | No |
| 2002 | 350 | 96% | Yes |
| 2003 | 335 | 92% | Yes |
| 2004 | 333 | 91% | Yes |
| 2005 | 337 | 92% | Yes |
| 2006 | 356 | 98% | Yes |
| 2007 | 359 | 98% | Yes |
| 2008 | 354 | 97% | Yes |
| 2009 | 351 | 96% | Yes |
| 2010 | 289 | 79% | No |
| 2011 | 346 | 95% | Yes |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 11 November 2011 | San Antonio Las Alazanas (Smn, MX | daily low max | 10.6 C (51.1 F) | 4.4 C (7.9 F) | 13 years | 21 of 100 (Routine) |
| 31 October 2011 | San Antonio Las Alazanas (Smn, MX | daily high max (Tie) | 26.7 C (80.1 F) | tie | 21 years | 2 of 100 (Routine) |
| 30 September 2011 | San Antonio Las Alazanas (Smn, MX | daily high min | 10.6 C (51.1 F) | 0.6 C (1.1 F) | 28 years | 13 of 100 (Routine) |
| 13 September 2011 | San Antonio Las Alazanas (Smn, MX | daily high max (Tie) | 30.0 C (86.0 F) | tie | 33 years | 3 of 100 (Routine) |
| 8 September 2011 | San Antonio Las Alazanas (Smn, MX | daily low min | 2.8 C (37.0 F) | 2.2 C (4.0 F) | 44 years | 23 of 100 (Routine) |
| 7 September 2011 | San Antonio Las Alazanas (Smn, MX | daily low min | 2.8 C (37.0 F) | 2.2 C (4.0 F) | 40 years | 22 of 100 (Routine) |
| 5 September 2011 | San Antonio Las Alazanas (Smn, MX | daily high min (Tie) | 12.8 C (55.0 F) | tie | 33 years | 3 of 100 (Routine) |
| 3 September 2011 | San Antonio Las Alazanas (Smn, MX | daily high min (Tie) | 13.9 C (57.0 F) | tie | 1 year | 1 of 100 (Routine) |
| 2 September 2011 | San Antonio Las Alazanas (Smn, MX | daily high min | 15.0 C (59.0 F) | 1.1 C (2.0 F) | 12 years | 10 of 100 (Routine) |
| 31 August 2011 | San Antonio Las Alazanas (Smn, MX | monthly high max | 40.0 C (104.0 F) | 1.1 C (2.0 F) | 1 year | 17 of 100 (Routine) |
| 26 August 2011 | San Antonio Las Alazanas (Smn, MX | daily high min (Tie) | 11.7 C (53.1 F) | tie | 33 years | 3 of 100 (Routine) |
| 17 July 2011 | San Antonio Las Alazanas (Smn, MX | daily high max | 30.0 C (86.0 F) | 1.1 C (2.0 F) | 33 years | 18 of 100 (Routine) |
| 13 July 2011 | San Antonio Las Alazanas (Smn, MX | monthly high max | 37.8 C (100.0 F) | 2.2 C (4.0 F) | 24 years | 29 of 100 (Routine) |
| 12 July 2011 | San Antonio Las Alazanas (Smn, MX | daily low min | 2.8 C (37.0 F) | 2.8 C (5.0 F) | 21 years | 22 of 100 (Routine) |
| 30 June 2011 | San Antonio Las Alazanas (Smn, MX | daily high max (Tie) | 30.6 C (87.1 F) | tie | 0 years | 1 of 100 (Routine) |
| 30 June 2011 | San Antonio Las Alazanas (Smn, MX | daily high min (Tie) | 15.0 C (59.0 F) | tie | 0 years | 1 of 100 (Routine) |
| 29 June 2011 | San Antonio Las Alazanas (Smn, MX | daily high max | 40.0 C (104.0 F) | 8.3 C (14.9 F) | 36 years | 39 of 100 (Notable) |
| 28 June 2011 | San Antonio Las Alazanas (Smn, MX | daily high max | 35.6 C (96.1 F) | 5.0 C (9.0 F) | 36 years | 30 of 100 (Routine) |
| 27 June 2011 | San Antonio Las Alazanas (Smn, MX | daily high max | 35.6 C (96.1 F) | 5.0 C (9.0 F) | 36 years | 30 of 100 (Routine) |
| 26 June 2011 | San Antonio Las Alazanas (Smn, MX | daily high max | 33.9 C (93.0 F) | 3.9 C (7.0 F) | 41 years | 28 of 100 (Routine) |
Climate Trend
30 complete years, 1967 to 2011| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1967 | 12.5 C | -2.87 C |
| 1968 | 12.6 C | -2.77 C |
| 1969 | 13.6 C | -1.79 C |
| 1970 | 13.3 C | -2.04 C |
| 1971 | 13.6 C | -1.78 C |
| 1974 | 18.6 C | +3.18 C |
| 1975 | 18.1 C | +2.77 C |
| 1976 | 17.2 C | +1.86 C |
| 1977 | 18.1 C | +2.70 C |
| 1979 | 15.8 C | +0.47 C |
| 1980 | 14.5 C | -0.92 C |
| 1984 | 17.7 C | +2.34 C |
| 1985 | 18.1 C | +2.76 C |
| 1986 | 18.1 C | +2.73 C |
| 1987 | 18.2 C | +2.82 C |
| 1994 | 14.6 C | -0.73 C |
| 1995 | 14.4 C | -0.94 C |
| 1996 | 14.4 C | -1.01 C |
| 1997 | 13.5 C | -1.85 C |
| 1998 | 14.8 C | -0.56 C |
| 1999 | 14.8 C | -0.53 C |
| 2000 | 15.0 C | -0.34 C |
| 2002 | 14.4 C | -0.97 C |
| 2003 | 14.5 C | -0.90 C |
| 2005 | 14.9 C | -0.45 C |
| 2006 | 14.5 C | -0.89 C |
| 2007 | 14.6 C | -0.78 C |
| 2008 | 14.6 C | -0.82 C |
| 2009 | 15.2 C | -0.13 C |
| 2011 | 16.8 C | +1.43 C |
The fitted trend in annual mean temperature here over 1967 to 2011 is -0.1 C (-0.6 to 0.4) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-1.0 to 0.8) per decade. The slope is a straight line fitted to 30 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | -0.1 C (-0.6 to 0.4) per decade | -0.1 F (-1.0 to 0.8) per decade | 1967 to 2011 | 30 | Not clearly different from zero |
| Mean daily maximum | -0.02 C (-0.53 to 0.49) per decade | -0.04 F (-0.96 to 0.87) per decade | 1967 to 2011 | 30 | Not clearly different from zero |
| Mean daily minimum | -0.1 C (-0.7 to 0.4) per decade | -0.2 F (-1.2 to 0.8) per decade | 1967 to 2011 | 30 | Not 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
1947 to 2011| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 41.7 C (107.1 F) | 2011 | 30.6 C (87.1 F) | 46 |
| Coldest night (TNn) | -14.4 C (6.1 F) | 1997 | -4.4 C (24.1 F) | 45 |
| Wettest day (Rx1day) | 119.9 mm (4.7 in) | 1988 | 30.0 mm (1.2 in) | 64 |
| Wettest five days (Rx5day) | 139.7 mm (5.5 in) | 1988 | 56.9 mm (2.2 in) | 64 |
| Longest dry spell (CDD) | 177 days | 1956 | 66 days | 64 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1947 | n/a |
| 1948 | n/a |
| 1949 | n/a |
| 1950 | n/a |
| 1951 | n/a |
| 1952 | n/a |
| 1953 | n/a |
| 1954 | 33.9 C (93.0 F) |
| 1955 | n/a |
| 1956 | n/a |
| 1957 | n/a |
| 1958 | n/a |
| 1959 | n/a |
| 1960 | n/a |
| 1961 | n/a |
| 1962 | n/a |
| 1963 | n/a |
| 1964 | n/a |
| 1965 | n/a |
| 1966 | n/a |
| 1967 | 31.7 C (89.1 F) |
| 1968 | 28.3 C (82.9 F) |
| 1969 | 31.7 C (89.1 F) |
| 1970 | 29.4 C (84.9 F) |
| 1971 | 30.0 C (86.0 F) |
| 1972 | 27.2 C (81.0 F) |
| 1973 | 31.7 C (89.1 F) |
| 1974 | 31.7 C (89.1 F) |
| 1975 | 32.8 C (91.0 F) |
| 1976 | 30.6 C (87.1 F) |
| 1977 | 30.6 C (87.1 F) |
| 1978 | 30.6 C (87.1 F) |
| 1979 | 30.0 C (86.0 F) |
| 1980 | 28.9 C (84.0 F) |
| 1981 | 25.0 C (77.0 F) |
| 1982 | 18.9 C (66.0 F) |
| 1983 | 36.1 C (97.0 F) |
| 1984 | 28.9 C (84.0 F) |
| 1985 | 26.7 C (80.1 F) |
| 1986 | 27.8 C (82.0 F) |
| 1987 | 35.6 C (96.1 F) |
| 1988 | 32.2 C (90.0 F) |
| 1989 | 35.6 C (96.1 F) |
| 1990 | 33.9 C (93.0 F) |
| 1991 | 35.6 C (96.1 F) |
| 1992 | 35.0 C (95.0 F) |
| 1993 | 30.0 C (86.0 F) |
| 1994 | 30.6 C (87.1 F) |
| 1995 | 31.7 C (89.1 F) |
| 1996 | 31.7 C (89.1 F) |
| 1997 | 30.0 C (86.0 F) |
| 1998 | 33.9 C (93.0 F) |
| 1999 | 31.7 C (89.1 F) |
| 2000 | 31.7 C (89.1 F) |
| 2001 | 30.0 C (86.0 F) |
| 2002 | 30.6 C (87.1 F) |
| 2003 | 31.7 C (89.1 F) |
| 2004 | 31.7 C (89.1 F) |
| 2005 | 30.6 C (87.1 F) |
| 2006 | 30.6 C (87.1 F) |
| 2007 | 30.0 C (86.0 F) |
| 2008 | 30.6 C (87.1 F) |
| 2009 | 30.0 C (86.0 F) |
| 2010 | 38.9 C (102.0 F) |
| 2011 | 41.7 C (107.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1947 | n/a |
| 1948 | n/a |
| 1949 | n/a |
| 1950 | n/a |
| 1951 | n/a |
| 1952 | n/a |
| 1953 | n/a |
| 1954 | n/a |
| 1955 | n/a |
| 1956 | n/a |
| 1957 | n/a |
| 1958 | n/a |
| 1959 | n/a |
| 1960 | n/a |
| 1961 | n/a |
| 1962 | n/a |
| 1963 | n/a |
| 1964 | n/a |
| 1965 | n/a |
| 1966 | n/a |
| 1967 | -9.4 C (15.1 F) |
| 1968 | -5.0 C (23.0 F) |
| 1969 | -5.0 C (23.0 F) |
| 1970 | -1.7 C (28.9 F) |
| 1971 | -2.8 C (27.0 F) |
| 1972 | -1.7 C (28.9 F) |
| 1973 | -0.6 C (30.9 F) |
| 1974 | 0.0 C (32.0 F) |
| 1975 | -4.4 C (24.1 F) |
| 1976 | 0.0 C (32.0 F) |
| 1977 | -5.0 C (23.0 F) |
| 1978 | 0.6 C (33.1 F) |
| 1979 | -8.3 C (17.1 F) |
| 1980 | 5.0 C (41.0 F) |
| 1981 | 1.7 C (35.1 F) |
| 1982 | 1.7 C (35.1 F) |
| 1983 | 5.0 C (41.0 F) |
| 1984 | 7.8 C (46.0 F) |
| 1985 | 2.2 C (36.0 F) |
| 1986 | 10.0 C (50.0 F) |
| 1987 | 3.9 C (39.0 F) |
| 1988 | -2.2 C (28.0 F) |
| 1989 | -7.2 C (19.0 F) |
| 1990 | -6.1 C (21.0 F) |
| 1991 | 0.0 C (32.0 F) |
| 1992 | -4.4 C (24.1 F) |
| 1993 | 0.0 C (32.0 F) |
| 1994 | -6.1 C (21.0 F) |
| 1995 | -5.0 C (23.0 F) |
| 1996 | -10.0 C (14.0 F) |
| 1997 | -14.4 C (6.1 F) |
| 1998 | -9.4 C (15.1 F) |
| 1999 | -6.1 C (21.0 F) |
| 2000 | -5.0 C (23.0 F) |
| 2001 | -6.1 C (21.0 F) |
| 2002 | -6.1 C (21.0 F) |
| 2003 | -5.0 C (23.0 F) |
| 2004 | -9.4 C (15.1 F) |
| 2005 | -4.4 C (24.1 F) |
| 2006 | -8.3 C (17.1 F) |
| 2007 | -6.1 C (21.0 F) |
| 2008 | -8.3 C (17.1 F) |
| 2009 | -7.2 C (19.0 F) |
| 2010 | -3.3 C (26.1 F) |
| 2011 | -3.3 C (26.1 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1947 | 4.8 mm (0.19 in) |
| 1948 | 75.9 mm (3.0 in) |
| 1949 | 19.8 mm (0.8 in) |
| 1950 | 77.0 mm (3.0 in) |
| 1951 | 34.8 mm (1.4 in) |
| 1952 | 38.1 mm (1.5 in) |
| 1953 | 0.0 mm (0.00 in) |
| 1954 | 25.9 mm (1.0 in) |
| 1955 | 23.9 mm (0.9 in) |
| 1956 | 19.8 mm (0.8 in) |
| 1957 | 30.0 mm (1.2 in) |
| 1958 | 39.9 mm (1.6 in) |
| 1959 | 36.8 mm (1.4 in) |
| 1960 | 19.8 mm (0.8 in) |
| 1961 | 21.8 mm (0.9 in) |
| 1962 | 19.8 mm (0.8 in) |
| 1963 | 27.9 mm (1.1 in) |
| 1964 | 23.9 mm (0.9 in) |
| 1965 | 19.8 mm (0.8 in) |
| 1966 | 14.0 mm (0.6 in) |
| 1967 | 27.9 mm (1.1 in) |
| 1968 | 19.8 mm (0.8 in) |
| 1969 | 99.8 mm (3.9 in) |
| 1970 | 19.8 mm (0.8 in) |
| 1971 | 30.0 mm (1.2 in) |
| 1972 | 19.8 mm (0.8 in) |
| 1973 | 30.7 mm (1.2 in) |
| 1974 | 30.0 mm (1.2 in) |
| 1975 | 30.0 mm (1.2 in) |
| 1976 | 81.8 mm (3.2 in) |
| 1977 | 27.9 mm (1.1 in) |
| 1978 | 30.0 mm (1.2 in) |
| 1979 | 19.8 mm (0.8 in) |
| 1980 | 19.8 mm (0.8 in) |
| 1981 | 59.9 mm (2.4 in) |
| 1982 | 0.0 mm (0.00 in) |
| 1983 | 39.9 mm (1.6 in) |
| 1984 | 10.9 mm (0.4 in) |
| 1985 | 3.8 mm (0.15 in) |
| 1986 | 39.9 mm (1.6 in) |
| 1987 | 17.8 mm (0.7 in) |
| 1988 | 119.9 mm (4.7 in) |
| 1989 | 31.8 mm (1.3 in) |
| 1990 | 33.8 mm (1.3 in) |
| 1991 | 39.9 mm (1.6 in) |
| 1992 | 32.8 mm (1.3 in) |
| 1993 | 34.8 mm (1.4 in) |
| 1994 | 79.8 mm (3.1 in) |
| 1995 | 52.8 mm (2.1 in) |
| 1996 | 39.9 mm (1.6 in) |
| 1997 | 79.8 mm (3.1 in) |
| 1998 | 26.9 mm (1.1 in) |
| 1999 | 22.9 mm (0.9 in) |
| 2000 | 47.8 mm (1.9 in) |
| 2001 | 42.9 mm (1.7 in) |
| 2002 | 52.8 mm (2.1 in) |
| 2003 | 63.0 mm (2.5 in) |
| 2004 | 54.9 mm (2.2 in) |
| 2005 | 69.9 mm (2.8 in) |
| 2006 | 34.8 mm (1.4 in) |
| 2007 | 35.8 mm (1.4 in) |
| 2008 | 24.9 mm (1.0 in) |
| 2009 | 21.8 mm (0.9 in) |
| 2010 | 21.8 mm (0.9 in) |
| 2011 | n/a |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1947 | 4.8 mm (0.19 in) |
| 1948 | 94.7 mm (3.7 in) |
| 1949 | 37.6 mm (1.5 in) |
| 1950 | 79.8 mm (3.1 in) |
| 1951 | 66.6 mm (2.6 in) |
| 1952 | 38.1 mm (1.5 in) |
| 1953 | 0.0 mm (0.00 in) |
| 1954 | 45.7 mm (1.8 in) |
| 1955 | 55.4 mm (2.2 in) |
| 1956 | 20.6 mm (0.8 in) |
| 1957 | 86.4 mm (3.4 in) |
| 1958 | 63.3 mm (2.5 in) |
| 1959 | 58.5 mm (2.3 in) |
| 1960 | 58.4 mm (2.3 in) |
| 1961 | 47.5 mm (1.9 in) |
| 1962 | 39.6 mm (1.6 in) |
| 1963 | 61.4 mm (2.4 in) |
| 1964 | 44.5 mm (1.8 in) |
| 1965 | 19.8 mm (0.8 in) |
| 1966 | 31.7 mm (1.2 in) |
| 1967 | 89.3 mm (3.5 in) |
| 1968 | 51.5 mm (2.0 in) |
| 1969 | 104.6 mm (4.1 in) |
| 1970 | 40.4 mm (1.6 in) |
| 1971 | 99.6 mm (3.9 in) |
| 1972 | 31.5 mm (1.2 in) |
| 1973 | 73.7 mm (2.9 in) |
| 1974 | 41.9 mm (1.6 in) |
| 1975 | 85.3 mm (3.4 in) |
| 1976 | 84.9 mm (3.3 in) |
| 1977 | 59.4 mm (2.3 in) |
| 1978 | 54.3 mm (2.1 in) |
| 1979 | 31.7 mm (1.2 in) |
| 1980 | 26.7 mm (1.1 in) |
| 1981 | 77.7 mm (3.1 in) |
| 1982 | 0.0 mm (0.00 in) |
| 1983 | 53.9 mm (2.1 in) |
| 1984 | 15.5 mm (0.6 in) |
| 1985 | 8.9 mm (0.35 in) |
| 1986 | 69.9 mm (2.8 in) |
| 1987 | 28.3 mm (1.1 in) |
| 1988 | 139.7 mm (5.5 in) |
| 1989 | 45.2 mm (1.8 in) |
| 1990 | 64.3 mm (2.5 in) |
| 1991 | 81.3 mm (3.2 in) |
| 1992 | 67.8 mm (2.7 in) |
| 1993 | 36.8 mm (1.4 in) |
| 1994 | 83.1 mm (3.3 in) |
| 1995 | 65.2 mm (2.6 in) |
| 1996 | 44.5 mm (1.8 in) |
| 1997 | 129.3 mm (5.1 in) |
| 1998 | 26.9 mm (1.1 in) |
| 1999 | 42.8 mm (1.7 in) |
| 2000 | 60.5 mm (2.4 in) |
| 2001 | 92.7 mm (3.6 in) |
| 2002 | 137.4 mm (5.4 in) |
| 2003 | 123.7 mm (4.9 in) |
| 2004 | 78.2 mm (3.1 in) |
| 2005 | 91.5 mm (3.6 in) |
| 2006 | 80.5 mm (3.2 in) |
| 2007 | 60.4 mm (2.4 in) |
| 2008 | 49.6 mm (2.0 in) |
| 2009 | 21.8 mm (0.9 in) |
| 2010 | 21.8 mm (0.9 in) |
| 2011 | n/a |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1947 | 19 days |
| 1948 | 46 days |
| 1949 | 70 days |
| 1950 | 88 days |
| 1951 | 73 days |
| 1952 | 101 days |
| 1953 | 61 days |
| 1954 | 102 days |
| 1955 | 121 days |
| 1956 | 177 days |
| 1957 | 148 days |
| 1958 | 102 days |
| 1959 | 63 days |
| 1960 | 129 days |
| 1961 | 54 days |
| 1962 | 94 days |
| 1963 | 102 days |
| 1964 | 104 days |
| 1965 | 66 days |
| 1966 | 117 days |
| 1967 | 66 days |
| 1968 | 53 days |
| 1969 | 81 days |
| 1970 | 97 days |
| 1971 | 99 days |
| 1972 | 71 days |
| 1973 | 76 days |
| 1974 | 107 days |
| 1975 | 64 days |
| 1976 | 40 days |
| 1977 | 45 days |
| 1978 | 50 days |
| 1979 | 93 days |
| 1980 | 69 days |
| 1981 | 37 days |
| 1982 | 151 days |
| 1983 | 86 days |
| 1984 | 105 days |
| 1985 | 30 days |
| 1986 | 30 days |
| 1987 | 58 days |
| 1988 | 34 days |
| 1989 | 58 days |
| 1990 | 36 days |
| 1991 | 69 days |
| 1992 | 22 days |
| 1993 | 21 days |
| 1994 | 55 days |
| 1995 | 65 days |
| 1996 | 61 days |
| 1997 | 36 days |
| 1998 | 86 days |
| 1999 | 84 days |
| 2000 | 70 days |
| 2001 | 42 days |
| 2002 | 51 days |
| 2003 | 39 days |
| 2004 | 49 days |
| 2005 | 45 days |
| 2006 | 45 days |
| 2007 | 58 days |
| 2008 | 112 days |
| 2009 | 21 days |
| 2010 | 24 days |
| 2011 | n/a |
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
23 years with a frostAcross 23 years with a frost, the median last spring frost at San Antonio Las Alazanas (Smn falls on 2 April and the median first autumn frost on 12 October, which leaves a median of 191 days between them.
| Measure | Median, all years | Earliest period | Recent period (1967 to 2011) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 2 April | n/a | 2 April | n/a | n/a |
| First autumn frost | 12 October | n/a | 12 October | n/a | n/a |
| Growing days | 191 days | n/a | 191 days | n/a | n/a |
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
52 years, 1950 to 2007A day with at least 31.4 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 133.4 mm (5.3 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 31.4 mm (1.2 in) | |
| 5 years | 51.4 mm (2.0 in) | |
| 10 years | 67.1 mm (2.6 in) | |
| 25 years | 90.4 mm (3.6 in) | |
| 50 years | 110.6 mm (4.4 in) | |
| 100 years | 133.4 mm (5.3 in) | Longer than the 52 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, 52 years of values from 1950 to 2007.
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: 119.9 mm (4.7 in) in 1988; 99.8 mm (3.9 in) in 1969; 81.8 mm (3.2 in) in 1976.
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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2025-12-31).