San Luis Ameca Weather Records (MXN00015094)
Record envelope, standing records and threshold days for San Luis Ameca (MXN00015094), Mexico, with 52 years of record.
Key Facts for San Luis Ameca
- San Luis Ameca (MXN00015094) is a weather station in Mexico at 19.18 latitude and -98.87 longitude, 2,285 m (7,496 ft) above sea level.
- The station reports from 1961 to 2012, 52 years of record.
- 1,464 records set at San Luis Ameca still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- San Luis Ameca tied a daily record high minimum temperature of 10.6 C (51.1 F) on 6 November 2012.
About the Station
- Location: Mexico, 19.18 latitude, -98.87 longitude.
- Elevation: 2,285 m (7,496 ft).
- Period of record: 1961 to 2012, 52 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 | 27.2 C (81.0 F) | -10.6 C (12.9 F) | n/a | n/a |
| Feb | 30.0 C (86.0 F) | -10.0 C (14.0 F) | n/a | n/a |
| Mar | 31.1 C (88.0 F) | -5.0 C (23.0 F) | n/a | n/a |
| Apr | 35.0 C (95.0 F) | -3.9 C (25.0 F) | n/a | n/a |
| May | 34.4 C (93.9 F) | 0.0 C (32.0 F) | n/a | n/a |
| Jun | 33.3 C (91.9 F) | 0.6 C (33.1 F) | n/a | n/a |
| Jul | 28.3 C (82.9 F) | 3.3 C (37.9 F) | n/a | n/a |
| Aug | 30.0 C (86.0 F) | 1.1 C (34.0 F) | n/a | n/a |
| Sep | 31.1 C (88.0 F) | 0.0 C (32.0 F) | n/a | n/a |
| Oct | 30.6 C (87.1 F) | -3.9 C (25.0 F) | n/a | n/a |
| Nov | 30.0 C (86.0 F) | -8.3 C (17.1 F) | n/a | n/a |
| Dec | 29.4 C (84.9 F) | -10.0 C (14.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1961 | 36 |
| 1962 | 26 |
| 1963 | 30 |
| 1964 | 19 |
| 1965 | 37 |
| 1966 | 58 |
| 1967 | 28 |
| 1968 | 35 |
| 1969 | 32 |
| 1970 | 25 |
| 1971 | 37 |
| 1972 | 46 |
| 1973 | 35 |
| 1974 | 36 |
| 1975 | 23 |
| 1976 | 39 |
| 1977 | 27 |
| 1978 | 72 |
| 1979 | 34 |
| 1980 | 41 |
| 1981 | 44 |
| 1982 | 81 |
| 1983 | 81 |
| 1984 | 20 |
| 1986 | 34 |
| 1987 | 56 |
| 1988 | 16 |
| 1995 | 4 |
| 1996 | 17 |
| 1997 | 31 |
| 1998 | 43 |
| 1999 | 19 |
| 2000 | 11 |
| 2001 | 13 |
| 2002 | 11 |
| 2003 | 14 |
| 2004 | 13 |
| 2005 | 19 |
| 2006 | 17 |
| 2007 | 31 |
| 2008 | 16 |
| 2009 | 31 |
| 2010 | 80 |
| 2011 | 19 |
| 2012 | 27 |
Wettest Day of Each Month
Jan: 72.4 mm (2.9 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 72.4 mm (2.9 in) | 10 January 1967 |
| Feb | 69.3 mm (2.7 in) | 4 February 2010 |
| Mar | 47.0 mm (1.9 in) | 4 March 1988 |
| Apr | 33.8 mm (1.3 in) | 1 April 2007 |
| May | 59.4 mm (2.3 in) | 31 May 1975 |
| Jun | 63.8 mm (2.5 in) | 30 June 2011 |
| Jul | 45.5 mm (1.8 in) | 22 July 2006 |
| Aug | 45.2 mm (1.8 in) | 23 August 2005 |
| Sep | 59.9 mm (2.4 in) | 26 September 1998 |
| Oct | 63.0 mm (2.5 in) | 3 October 1996 |
| Nov | 17.8 mm (0.7 in) | 25 November 1997 |
| Dec | 23.4 mm (0.9 in) | 2 December 1976 |
Period of Record Coverage
1961 to 2012| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1961 | 344 | 94% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 360 | 99% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 334 | 92% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 335 | 92% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 334 | 92% | Yes |
| 1978 | 364 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 365 | 100% | Yes |
| 1981 | 359 | 98% | Yes |
| 1982 | 364 | 100% | Yes |
| 1983 | 363 | 99% | Yes |
| 1984 | 366 | 100% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 364 | 100% | Yes |
| 1988 | 213 | 58% | No |
| 1995 | 120 | 33% | No |
| 1996 | 335 | 92% | Yes |
| 1997 | 365 | 100% | Yes |
| 1998 | 365 | 100% | Yes |
| 1999 | 365 | 100% | Yes |
| 2000 | 366 | 100% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 365 | 100% | Yes |
| 2005 | 352 | 96% | Yes |
| 2006 | 355 | 97% | Yes |
| 2007 | 324 | 89% | No |
| 2008 | 364 | 99% | Yes |
| 2009 | 334 | 92% | Yes |
| 2010 | 360 | 99% | Yes |
| 2011 | 364 | 100% | Yes |
| 2012 | 333 | 91% | Yes |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 6 November 2012 | San Luis Ameca, MX | daily high min (Tie) | 10.6 C (51.1 F) | tie | 37 years | 4 of 100 (Routine) |
| 5 November 2012 | San Luis Ameca, MX | daily rain | 13.7 mm (0.5 in) | 6.8 mm (0.27 in) | 32 years | 20 of 100 (Routine) |
| 5 November 2012 | San Luis Ameca, MX | daily high min (Tie) | 10.6 C (51.1 F) | tie | 10 years | 2 of 100 (Routine) |
| 3 November 2012 | San Luis Ameca, MX | daily high min | 11.7 C (53.1 F) | 1.1 C (2.0 F) | 9 years | 9 of 100 (Routine) |
| 3 November 2012 | San Luis Ameca, MX | daily low max (Tie) | 16.7 C (62.1 F) | tie | 10 years | 2 of 100 (Routine) |
| 5 October 2012 | San Luis Ameca, MX | daily low min | 1.1 C (34.0 F) | 2.2 C (4.0 F) | 25 years | 18 of 100 (Routine) |
| 20 September 2012 | San Luis Ameca, MX | daily low max | 16.7 C (62.1 F) | 1.6 C (2.9 F) | 50 years | 27 of 100 (Routine) |
| 20 September 2012 | San Luis Ameca, MX | daily low min (Tie) | 3.9 C (39.0 F) | tie | 13 years | 2 of 100 (Routine) |
| 19 September 2012 | San Luis Ameca, MX | daily low max | 17.8 C (64.0 F) | 0.5 C (0.9 F) | 33 years | 16 of 100 (Routine) |
| 17 September 2012 | San Luis Ameca, MX | daily rain | 31.0 mm (1.2 in) | 7.1 mm (0.28 in) | 14 years | 18 of 100 (Routine) |
| 17 September 2012 | San Luis Ameca, MX | daily low min (Tie) | 5.6 C (42.1 F) | tie | 30 years | 3 of 100 (Routine) |
| 10 September 2012 | San Luis Ameca, MX | daily low max | 18.9 C (66.0 F) | 0.5 C (0.9 F) | 51 years | 22 of 100 (Routine) |
| 1 September 2012 | San Luis Ameca, MX | daily low max (Tie) | 18.9 C (66.0 F) | tie | 5 years | 1 of 100 (Routine) |
| 29 August 2012 | San Luis Ameca, MX | daily low max (Tie) | 20.0 C (68.0 F) | tie | 47 years | 4 of 100 (Routine) |
| 28 August 2012 | San Luis Ameca, MX | daily low max (Tie) | 18.9 C (66.0 F) | tie | 31 years | 3 of 100 (Routine) |
| 27 August 2012 | San Luis Ameca, MX | daily low max | 16.7 C (62.1 F) | 2.2 C (4.0 F) | 2 years | 16 of 100 (Routine) |
| 25 August 2012 | San Luis Ameca, MX | daily rain | 29.0 mm (1.1 in) | 5.6 mm (0.22 in) | 49 years | 26 of 100 (Routine) |
| 24 August 2012 | San Luis Ameca, MX | daily rain | 30.0 mm (1.2 in) | 13.0 mm (0.5 in) | 36 years | 32 of 100 (Routine) |
| 24 August 2012 | San Luis Ameca, MX | daily low max | 18.9 C (66.0 F) | 1.1 C (2.0 F) | 47 years | 24 of 100 (Routine) |
| 21 August 2012 | San Luis Ameca, MX | daily low max | 17.8 C (64.0 F) | 1.1 C (2.0 F) | 44 years | 23 of 100 (Routine) |
Climate Trend
34 complete years, 1962 to 2011| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1962 | 14.2 C | -0.78 C |
| 1963 | 14.3 C | -0.67 C |
| 1964 | 14.5 C | -0.54 C |
| 1965 | 13.9 C | -1.10 C |
| 1966 | 13.7 C | -1.26 C |
| 1967 | 13.7 C | -1.27 C |
| 1968 | 13.8 C | -1.22 C |
| 1969 | 14.6 C | -0.38 C |
| 1971 | 13.2 C | -1.76 C |
| 1972 | 13.3 C | -1.67 C |
| 1973 | 13.8 C | -1.25 C |
| 1975 | 14.5 C | -0.49 C |
| 1976 | 15.0 C | -0.03 C |
| 1978 | 15.8 C | +0.78 C |
| 1979 | 15.7 C | +0.70 C |
| 1980 | 16.0 C | +0.99 C |
| 1981 | 15.9 C | +0.88 C |
| 1982 | 16.5 C | +1.46 C |
| 1983 | 16.3 C | +1.29 C |
| 1984 | 15.8 C | +0.83 C |
| 1986 | 15.7 C | +0.68 C |
| 1987 | 16.0 C | +1.00 C |
| 1997 | 15.2 C | +0.19 C |
| 1998 | 16.0 C | +0.98 C |
| 1999 | 14.8 C | -0.17 C |
| 2000 | 15.2 C | +0.18 C |
| 2001 | 15.0 C | +0.00 C |
| 2002 | 15.5 C | +0.48 C |
| 2003 | 15.6 C | +0.63 C |
| 2004 | 15.1 C | +0.09 C |
| 2006 | 15.3 C | +0.32 C |
| 2008 | 15.3 C | +0.34 C |
| 2010 | 15.5 C | +0.47 C |
| 2011 | 15.2 C | +0.20 C |
The annual mean temperature here has risen by 0.3 C (0.1 to 0.5) per decade over 1962 to 2011. In Fahrenheit: 0.6 F (0.2 to 0.9) per decade. The slope is a straight line fitted to 34 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.3 C (0.1 to 0.5) per decade | 0.6 F (0.2 to 0.9) per decade | 1962 to 2011 | 34 | Rise |
| Mean daily maximum | 0.21 C (0.02 to 0.40) per decade | 0.37 F (0.03 to 0.71) per decade | 1962 to 2011 | 34 | Rise |
| Mean daily minimum | 0.4 C (0.2 to 0.6) per decade | 0.7 F (0.4 to 1.1) per decade | 1962 to 2011 | 34 | Rise |
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
1961 to 2012| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 35.0 C (95.0 F) | 1983 | 30.0 C (86.0 F) | 45 |
| Coldest night (TNn) | -10.6 C (12.9 F) | 1973 | -5.6 C (21.9 F) | 45 |
| Wettest day (Rx1day) | 72.4 mm (2.9 in) | 1967 | 39.9 mm (1.6 in) | 45 |
| Wettest five days (Rx5day) | 161.8 mm (6.4 in) | 2010 | 68.8 mm (2.7 in) | 45 |
| Longest dry spell (CDD) | 128 days | 1998 | 68 days | 45 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1961 | 30.6 C (87.1 F) |
| 1962 | 30.0 C (86.0 F) |
| 1963 | 29.4 C (84.9 F) |
| 1964 | 30.0 C (86.0 F) |
| 1965 | 29.4 C (84.9 F) |
| 1966 | 29.4 C (84.9 F) |
| 1967 | 30.0 C (86.0 F) |
| 1968 | 28.3 C (82.9 F) |
| 1969 | 30.0 C (86.0 F) |
| 1970 | 29.4 C (84.9 F) |
| 1971 | 30.0 C (86.0 F) |
| 1972 | 30.0 C (86.0 F) |
| 1973 | 30.0 C (86.0 F) |
| 1974 | 30.0 C (86.0 F) |
| 1975 | 30.0 C (86.0 F) |
| 1976 | 28.3 C (82.9 F) |
| 1977 | 31.1 C (88.0 F) |
| 1978 | 30.6 C (87.1 F) |
| 1979 | 30.0 C (86.0 F) |
| 1980 | 31.1 C (88.0 F) |
| 1981 | 32.2 C (90.0 F) |
| 1982 | 33.3 C (91.9 F) |
| 1983 | 35.0 C (95.0 F) |
| 1984 | 31.1 C (88.0 F) |
| 1986 | 31.7 C (89.1 F) |
| 1987 | 30.6 C (87.1 F) |
| 1988 | 33.3 C (91.9 F) |
| 1995 | 30.6 C (87.1 F) |
| 1996 | 30.0 C (86.0 F) |
| 1997 | 30.0 C (86.0 F) |
| 1998 | 34.4 C (93.9 F) |
| 1999 | 30.0 C (86.0 F) |
| 2000 | 30.6 C (87.1 F) |
| 2001 | 30.0 C (86.0 F) |
| 2002 | 30.6 C (87.1 F) |
| 2003 | 31.7 C (89.1 F) |
| 2004 | 29.4 C (84.9 F) |
| 2005 | 31.7 C (89.1 F) |
| 2006 | 30.0 C (86.0 F) |
| 2007 | 29.4 C (84.9 F) |
| 2008 | 31.1 C (88.0 F) |
| 2009 | 30.0 C (86.0 F) |
| 2010 | 31.7 C (89.1 F) |
| 2011 | 31.1 C (88.0 F) |
| 2012 | 30.0 C (86.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1961 | -10.0 C (14.0 F) |
| 1962 | -6.1 C (21.0 F) |
| 1963 | -10.0 C (14.0 F) |
| 1964 | -3.3 C (26.1 F) |
| 1965 | -8.3 C (17.1 F) |
| 1966 | -7.8 C (18.0 F) |
| 1967 | -9.4 C (15.1 F) |
| 1968 | -7.2 C (19.0 F) |
| 1969 | -6.1 C (21.0 F) |
| 1970 | -7.8 C (18.0 F) |
| 1971 | -5.6 C (21.9 F) |
| 1972 | -9.4 C (15.1 F) |
| 1973 | -10.6 C (12.9 F) |
| 1974 | -6.7 C (19.9 F) |
| 1975 | -6.7 C (19.9 F) |
| 1976 | -7.8 C (18.0 F) |
| 1977 | -4.4 C (24.1 F) |
| 1978 | -2.2 C (28.0 F) |
| 1979 | -2.2 C (28.0 F) |
| 1980 | -4.4 C (24.1 F) |
| 1981 | -4.4 C (24.1 F) |
| 1982 | -5.0 C (23.0 F) |
| 1983 | -3.9 C (25.0 F) |
| 1984 | -1.7 C (28.9 F) |
| 1986 | 0.0 C (32.0 F) |
| 1987 | 0.0 C (32.0 F) |
| 1988 | 0.0 C (32.0 F) |
| 1995 | -1.1 C (30.0 F) |
| 1996 | -6.1 C (21.0 F) |
| 1997 | -7.2 C (19.0 F) |
| 1998 | -7.8 C (18.0 F) |
| 1999 | -6.7 C (19.9 F) |
| 2000 | -5.0 C (23.0 F) |
| 2001 | -3.3 C (26.1 F) |
| 2002 | -7.2 C (19.0 F) |
| 2003 | -5.0 C (23.0 F) |
| 2004 | -5.0 C (23.0 F) |
| 2005 | -5.6 C (21.9 F) |
| 2006 | -7.8 C (18.0 F) |
| 2007 | -5.6 C (21.9 F) |
| 2008 | -4.4 C (24.1 F) |
| 2009 | -5.0 C (23.0 F) |
| 2010 | -7.2 C (19.0 F) |
| 2011 | -3.9 C (25.0 F) |
| 2012 | -2.2 C (28.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1961 | 33.8 mm (1.3 in) |
| 1962 | 38.4 mm (1.5 in) |
| 1963 | 23.9 mm (0.9 in) |
| 1964 | 43.4 mm (1.7 in) |
| 1965 | 37.3 mm (1.5 in) |
| 1966 | 30.5 mm (1.2 in) |
| 1967 | 72.4 mm (2.9 in) |
| 1968 | 39.9 mm (1.6 in) |
| 1969 | 42.9 mm (1.7 in) |
| 1970 | 36.8 mm (1.4 in) |
| 1971 | 27.9 mm (1.1 in) |
| 1972 | 45.0 mm (1.8 in) |
| 1973 | 39.9 mm (1.6 in) |
| 1974 | 40.1 mm (1.6 in) |
| 1975 | 59.4 mm (2.3 in) |
| 1976 | 42.2 mm (1.7 in) |
| 1977 | 29.0 mm (1.1 in) |
| 1978 | 39.9 mm (1.6 in) |
| 1979 | 36.8 mm (1.4 in) |
| 1980 | 39.9 mm (1.6 in) |
| 1981 | 26.9 mm (1.1 in) |
| 1982 | 29.0 mm (1.1 in) |
| 1983 | 30.2 mm (1.2 in) |
| 1984 | 39.9 mm (1.6 in) |
| 1986 | 40.1 mm (1.6 in) |
| 1987 | 32.3 mm (1.3 in) |
| 1988 | 47.0 mm (1.9 in) |
| 1995 | 15.5 mm (0.6 in) |
| 1996 | 63.0 mm (2.5 in) |
| 1997 | 24.9 mm (1.0 in) |
| 1998 | 59.9 mm (2.4 in) |
| 1999 | 25.9 mm (1.0 in) |
| 2000 | 35.3 mm (1.4 in) |
| 2001 | 52.3 mm (2.1 in) |
| 2002 | 55.6 mm (2.2 in) |
| 2003 | 43.4 mm (1.7 in) |
| 2004 | 32.8 mm (1.3 in) |
| 2005 | 45.2 mm (1.8 in) |
| 2006 | 46.5 mm (1.8 in) |
| 2007 | 36.6 mm (1.4 in) |
| 2008 | 27.7 mm (1.1 in) |
| 2009 | 34.8 mm (1.4 in) |
| 2010 | 69.3 mm (2.7 in) |
| 2011 | 63.8 mm (2.5 in) |
| 2012 | 31.0 mm (1.2 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1961 | 72.2 mm (2.8 in) |
| 1962 | 61.0 mm (2.4 in) |
| 1963 | 57.2 mm (2.3 in) |
| 1964 | 118.8 mm (4.7 in) |
| 1965 | 75.7 mm (3.0 in) |
| 1966 | 69.0 mm (2.7 in) |
| 1967 | 102.6 mm (4.0 in) |
| 1968 | 65.9 mm (2.6 in) |
| 1969 | 114.9 mm (4.5 in) |
| 1970 | 90.4 mm (3.6 in) |
| 1971 | 54.2 mm (2.1 in) |
| 1972 | 58.7 mm (2.3 in) |
| 1973 | 62.0 mm (2.4 in) |
| 1974 | 77.0 mm (3.0 in) |
| 1975 | 89.9 mm (3.5 in) |
| 1976 | 115.9 mm (4.6 in) |
| 1977 | 57.8 mm (2.3 in) |
| 1978 | 95.3 mm (3.8 in) |
| 1979 | 106.2 mm (4.2 in) |
| 1980 | 97.1 mm (3.8 in) |
| 1981 | 52.3 mm (2.1 in) |
| 1982 | 55.5 mm (2.2 in) |
| 1983 | 77.7 mm (3.1 in) |
| 1984 | 69.6 mm (2.7 in) |
| 1986 | 61.4 mm (2.4 in) |
| 1987 | 63.4 mm (2.5 in) |
| 1988 | 54.3 mm (2.1 in) |
| 1995 | 39.9 mm (1.6 in) |
| 1996 | 68.6 mm (2.7 in) |
| 1997 | 43.8 mm (1.7 in) |
| 1998 | 133.6 mm (5.3 in) |
| 1999 | 67.0 mm (2.6 in) |
| 2000 | 67.9 mm (2.7 in) |
| 2001 | 82.8 mm (3.3 in) |
| 2002 | 60.7 mm (2.4 in) |
| 2003 | 68.8 mm (2.7 in) |
| 2004 | 59.5 mm (2.3 in) |
| 2005 | 70.6 mm (2.8 in) |
| 2006 | 86.9 mm (3.4 in) |
| 2007 | 50.9 mm (2.0 in) |
| 2008 | 55.6 mm (2.2 in) |
| 2009 | 59.2 mm (2.3 in) |
| 2010 | 161.8 mm (6.4 in) |
| 2011 | 106.8 mm (4.2 in) |
| 2012 | 100.3 mm (3.9 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1961 | 56 days |
| 1962 | 86 days |
| 1963 | 78 days |
| 1964 | 78 days |
| 1965 | 40 days |
| 1966 | 52 days |
| 1967 | 67 days |
| 1968 | 30 days |
| 1969 | 50 days |
| 1970 | 43 days |
| 1971 | 77 days |
| 1972 | 65 days |
| 1973 | 56 days |
| 1974 | 40 days |
| 1975 | 75 days |
| 1976 | 90 days |
| 1977 | 39 days |
| 1978 | 43 days |
| 1979 | 45 days |
| 1980 | 69 days |
| 1981 | 57 days |
| 1982 | 79 days |
| 1983 | 72 days |
| 1984 | 70 days |
| 1986 | 92 days |
| 1987 | 52 days |
| 1988 | 43 days |
| 1995 | 51 days |
| 1996 | 67 days |
| 1997 | 70 days |
| 1998 | 128 days |
| 1999 | 73 days |
| 2000 | 68 days |
| 2001 | 68 days |
| 2002 | 47 days |
| 2003 | 88 days |
| 2004 | 77 days |
| 2005 | 72 days |
| 2006 | 111 days |
| 2007 | 33 days |
| 2008 | 72 days |
| 2009 | 53 days |
| 2010 | 98 days |
| 2011 | 105 days |
| 2012 | 47 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
33 years with a frostAcross 33 years with a frost, the median last spring frost at San Luis Ameca falls on 6 March and the median first autumn frost on 2 November, which leaves a median of 244 days between them.
Fitted over all years, the growing season changes by +9.8 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1965 to 2011) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 6 March | n/a | 3 March | n/a | -8.5 days per decade |
| First autumn frost | 2 November | n/a | 4 November | n/a | +1.2 days per decade |
| Growing days | 244 days | n/a | 246 days | n/a | +9.8 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
42 years, 1961 to 2011A day with at least 38.4 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 83.3 mm (3.3 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 38.4 mm (1.5 in) | |
| 5 years | 49.3 mm (1.9 in) | |
| 10 years | 56.9 mm (2.2 in) | |
| 25 years | 67.1 mm (2.6 in) | |
| 50 years | 75.1 mm (3.0 in) | Longer than the 42 years of record |
| 100 years | 83.3 mm (3.3 in) | Longer than the 42 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, 42 years of values from 1961 to 2011.
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: 72.4 mm (2.9 in) in 1967; 69.3 mm (2.7 in) in 2010; 63.8 mm (2.5 in) in 2011.
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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).