San Lorenzo Sayula Weather Records (MXN00013029)
Record envelope, standing records and threshold days for San Lorenzo Sayula (MXN00013029), Mexico, with 52 years of record.
Key Facts for San Lorenzo Sayula
- San Lorenzo Sayula (MXN00013029) is a weather station in Mexico at 19.98 latitude and -98.28 longitude, 2,768 m (9,081 ft) above sea level.
- The station reports from 1961 to 2012, 52 years of record.
- 1,464 records set at San Lorenzo Sayula still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- San Lorenzo Sayula tied a daily record high minimum temperature of 7.8 C (46.0 F) on 18 December 2012.
About the Station
- Location: Mexico, 19.98 latitude, -98.28 longitude.
- Elevation: 2,768 m (9,081 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 | 27.8 C (82.0 F) | -8.3 C (17.1 F) | n/a | n/a |
| Feb | 30.0 C (86.0 F) | -7.2 C (19.0 F) | n/a | n/a |
| Mar | 30.6 C (87.1 F) | -6.1 C (21.0 F) | n/a | n/a |
| Apr | 32.8 C (91.0 F) | -6.1 C (21.0 F) | n/a | n/a |
| May | 32.8 C (91.0 F) | -4.4 C (24.1 F) | n/a | n/a |
| Jun | 30.0 C (86.0 F) | 1.7 C (35.1 F) | n/a | n/a |
| Jul | 28.9 C (84.0 F) | 0.0 C (32.0 F) | n/a | n/a |
| Aug | 28.9 C (84.0 F) | -3.3 C (26.1 F) | n/a | n/a |
| Sep | 27.8 C (82.0 F) | -6.1 C (21.0 F) | n/a | n/a |
| Oct | 26.7 C (80.1 F) | -6.1 C (21.0 F) | n/a | n/a |
| Nov | 28.3 C (82.9 F) | -7.2 C (19.0 F) | n/a | n/a |
| Dec | 26.7 C (80.1 F) | -8.3 C (17.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1967 | 28 |
| 1968 | 47 |
| 1969 | 53 |
| 1970 | 60 |
| 1971 | 24 |
| 1972 | 45 |
| 1973 | 72 |
| 1974 | 47 |
| 1975 | 47 |
| 1976 | 40 |
| 1977 | 27 |
| 1978 | 40 |
| 1979 | 64 |
| 1980 | 41 |
| 1981 | 31 |
| 1982 | 32 |
| 1983 | 61 |
| 1984 | 54 |
| 1985 | 26 |
| 1986 | 30 |
| 1987 | 57 |
| 1988 | 24 |
| 1989 | 31 |
| 1990 | 22 |
| 1991 | 30 |
| 1992 | 16 |
| 1993 | 10 |
| 1996 | 41 |
| 1997 | 21 |
| 1998 | 20 |
| 1999 | 35 |
| 2000 | 53 |
| 2005 | 56 |
| 2007 | 41 |
| 2008 | 22 |
| 2009 | 22 |
| 2010 | 15 |
| 2011 | 20 |
| 2012 | 59 |
All-Time Record Progression
1 new records| Date | Kind | Detail |
|---|---|---|
| 1999-10-05 | Record daily precipitation | Record daily precipitation 140.0 mm (5.5 in) |
Wettest Day of Each Month
Oct: 140.0 mm (5.5 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 34.8 mm (1.4 in) | 29 January 1992 |
| Feb | 24.9 mm (1.0 in) | 3 February 2007 |
| Mar | 26.4 mm (1.0 in) | 16 March 1978 |
| Apr | 37.3 mm (1.5 in) | 20 April 1979 |
| May | 79.8 mm (3.1 in) | 10 May 1969 |
| Jun | 101.9 mm (4.0 in) | 30 June 2011 |
| Jul | 74.9 mm (2.9 in) | 5 July 2005 |
| Aug | 63.8 mm (2.5 in) | 16 August 1969 |
| Sep | 96.8 mm (3.8 in) | 20 September 1974 |
| Oct | 140.0 mm (5.5 in) | 5 October 1999 |
| Nov | 30.0 mm (1.2 in) | 29 November 1972 |
| Dec | 15.7 mm (0.6 in) | 3 December 1979 |
Period of Record Coverage
1967 to 2012| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1967 | 226 | 62% | No |
| 1968 | 362 | 99% | Yes |
| 1969 | 363 | 99% | Yes |
| 1970 | 364 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 337 | 92% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 364 | 100% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 364 | 100% | Yes |
| 1987 | 364 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 334 | 92% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 335 | 92% | Yes |
| 1993 | 181 | 50% | No |
| 1996 | 326 | 89% | No |
| 1997 | 364 | 100% | Yes |
| 1998 | 359 | 98% | Yes |
| 1999 | 353 | 97% | Yes |
| 2000 | 363 | 99% | Yes |
| 2005 | 364 | 100% | Yes |
| 2007 | 363 | 99% | Yes |
| 2008 | 366 | 100% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 181 | 50% | No |
| 2011 | 365 | 100% | Yes |
| 2012 | 362 | 99% | Yes |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 18 December 2012 | San Lorenzo Sayula, MX | daily high min (Tie) | 7.8 C (46.0 F) | tie | 23 years | 2 of 100 (Routine) |
| 17 December 2012 | San Lorenzo Sayula, MX | daily high max (Tie) | 23.9 C (75.0 F) | tie | 44 years | 4 of 100 (Routine) |
| 22 November 2012 | San Lorenzo Sayula, MX | daily high max (Tie) | 25.0 C (77.0 F) | tie | 39 years | 3 of 100 (Routine) |
| 15 November 2012 | San Lorenzo Sayula, MX | daily rain | 11.9 mm (0.5 in) | 0.7 mm (0.03 in) | 1 year | 6 of 100 (Routine) |
| 3 November 2012 | San Lorenzo Sayula, MX | daily low min | -4.4 C (24.1 F) | 1.1 C (2.0 F) | 3 years | 7 of 100 (Routine) |
| 2 November 2012 | San Lorenzo Sayula, MX | daily low min (Tie) | -2.2 C (28.0 F) | tie | 24 years | 2 of 100 (Routine) |
| 1 November 2012 | San Lorenzo Sayula, MX | daily low min (Tie) | -3.3 C (26.1 F) | tie | 25 years | 2 of 100 (Routine) |
| 9 October 2012 | San Lorenzo Sayula, MX | daily rain (Tie) | 11.9 mm (0.5 in) | tie | 21 years | 2 of 100 (Routine) |
| 29 September 2012 | San Lorenzo Sayula, MX | daily high max (Tie) | 25.0 C (77.0 F) | tie | 30 years | 3 of 100 (Routine) |
| 20 September 2012 | San Lorenzo Sayula, MX | daily low min (Tie) | 2.8 C (37.0 F) | tie | 5 years | 1 of 100 (Routine) |
| 18 September 2012 | San Lorenzo Sayula, MX | daily low min (Tie) | 2.8 C (37.0 F) | tie | 4 years | 1 of 100 (Routine) |
| 17 September 2012 | San Lorenzo Sayula, MX | daily low min | 1.7 C (35.1 F) | 1.1 C (2.0 F) | 5 years | 8 of 100 (Routine) |
| 16 September 2012 | San Lorenzo Sayula, MX | daily low min (Tie) | 2.8 C (37.0 F) | tie | 5 years | 1 of 100 (Routine) |
| 1 September 2012 | San Lorenzo Sayula, MX | daily high max (Tie) | 23.9 C (75.0 F) | tie | 31 years | 3 of 100 (Routine) |
| 26 August 2012 | San Lorenzo Sayula, MX | daily low min (Tie) | 3.9 C (39.0 F) | tie | 5 years | 1 of 100 (Routine) |
| 24 August 2012 | San Lorenzo Sayula, MX | daily rain | 25.1 mm (1.0 in) | 10.6 mm (0.4 in) | 46 years | 30 of 100 (Routine) |
| 13 August 2012 | San Lorenzo Sayula, MX | daily high max (Tie) | 23.9 C (75.0 F) | tie | 40 years | 4 of 100 (Routine) |
| 7 August 2012 | San Lorenzo Sayula, MX | daily low min (Tie) | 3.9 C (39.0 F) | tie | 30 years | 3 of 100 (Routine) |
| 30 July 2012 | San Lorenzo Sayula, MX | daily low min (Tie) | 3.9 C (39.0 F) | tie | 14 years | 2 of 100 (Routine) |
| 28 July 2012 | San Lorenzo Sayula, MX | daily low min (Tie) | 2.8 C (37.0 F) | tie | 7 years | 1 of 100 (Routine) |
Climate Trend
32 complete years, 1968 to 2012| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1968 | 13.9 C | +0.24 C |
| 1969 | 14.4 C | +0.72 C |
| 1970 | 13.9 C | +0.24 C |
| 1971 | 14.1 C | +0.48 C |
| 1972 | 14.2 C | +0.50 C |
| 1973 | 14.6 C | +0.99 C |
| 1974 | 13.9 C | +0.23 C |
| 1976 | 13.7 C | +0.05 C |
| 1977 | 14.4 C | +0.78 C |
| 1978 | 14.0 C | +0.35 C |
| 1979 | 13.9 C | +0.27 C |
| 1980 | 14.1 C | +0.41 C |
| 1981 | 13.7 C | +0.06 C |
| 1982 | 14.5 C | +0.87 C |
| 1983 | 14.8 C | +1.15 C |
| 1984 | 14.1 C | +0.41 C |
| 1985 | 14.0 C | +0.31 C |
| 1986 | 13.7 C | +0.07 C |
| 1987 | 14.0 C | +0.37 C |
| 1988 | 14.1 C | +0.40 C |
| 1990 | 13.9 C | +0.24 C |
| 1991 | 14.3 C | +0.69 C |
| 1997 | 13.4 C | -0.22 C |
| 1998 | 13.9 C | +0.29 C |
| 1999 | 13.3 C | -0.31 C |
| 2000 | 13.4 C | -0.26 C |
| 2005 | 10.7 C | -2.94 C |
| 2007 | 12.1 C | -1.53 C |
| 2008 | 12.1 C | -1.51 C |
| 2009 | 12.4 C | -1.29 C |
| 2011 | 13.8 C | +0.16 C |
| 2012 | 11.5 C | -2.14 C |
The annual mean temperature here has fallen by 0.5 C (0.3 to 0.7) per decade over 1968 to 2012. In Fahrenheit: 0.9 F (0.6 to 1.2) per decade. The slope is a straight line fitted to 32 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | -0.5 C (-0.7 to -0.3) per decade | -0.9 F (-1.2 to -0.6) per decade | 1968 to 2012 | 32 | Fall |
| Mean daily maximum | -0.4 C (-0.6 to -0.2) per decade | -0.7 F (-1.0 to -0.4) per decade | 1968 to 2012 | 32 | Fall |
| Mean daily minimum | -0.6 C (-0.8 to -0.3) per decade | -1.0 F (-1.4 to -0.6) per decade | 1968 to 2012 | 32 | Fall |
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) | 32.8 C (91.0 F) | 1983 | 30.0 C (86.0 F) | 39 |
| Coldest night (TNn) | -8.3 C (17.1 F) | 1970 | -4.4 C (24.1 F) | 39 |
| Wettest day (Rx1day) | 140.0 mm (5.5 in) | 1999 | 37.3 mm (1.5 in) | 45 |
| Wettest five days (Rx5day) | 236.8 mm (9.3 in) | 1999 | 86.9 mm (3.4 in) | 45 |
| Longest dry spell (CDD) | 106 days | 1986 | 41 days | 45 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1961 | n/a |
| 1962 | n/a |
| 1963 | n/a |
| 1964 | n/a |
| 1965 | n/a |
| 1966 | n/a |
| 1967 | 27.8 C (82.0 F) |
| 1968 | 31.7 C (89.1 F) |
| 1969 | 30.0 C (86.0 F) |
| 1970 | 31.7 C (89.1 F) |
| 1971 | 30.6 C (87.1 F) |
| 1972 | 30.0 C (86.0 F) |
| 1973 | 31.7 C (89.1 F) |
| 1974 | 30.0 C (86.0 F) |
| 1975 | 30.6 C (87.1 F) |
| 1976 | 30.6 C (87.1 F) |
| 1977 | 30.0 C (86.0 F) |
| 1978 | 29.4 C (84.9 F) |
| 1979 | 28.9 C (84.0 F) |
| 1980 | 28.9 C (84.0 F) |
| 1981 | 28.3 C (82.9 F) |
| 1982 | 30.0 C (86.0 F) |
| 1983 | 32.8 C (91.0 F) |
| 1984 | 31.7 C (89.1 F) |
| 1985 | 28.9 C (84.0 F) |
| 1986 | 30.0 C (86.0 F) |
| 1987 | 32.8 C (91.0 F) |
| 1988 | 30.0 C (86.0 F) |
| 1989 | 30.0 C (86.0 F) |
| 1990 | 30.0 C (86.0 F) |
| 1991 | 30.6 C (87.1 F) |
| 1992 | 31.7 C (89.1 F) |
| 1993 | 28.9 C (84.0 F) |
| 1996 | 28.9 C (84.0 F) |
| 1997 | 28.9 C (84.0 F) |
| 1998 | 30.6 C (87.1 F) |
| 1999 | 30.6 C (87.1 F) |
| 2000 | 30.0 C (86.0 F) |
| 2005 | 26.7 C (80.1 F) |
| 2007 | 28.9 C (84.0 F) |
| 2008 | 30.0 C (86.0 F) |
| 2009 | 32.8 C (91.0 F) |
| 2010 | 26.7 C (80.1 F) |
| 2011 | 31.7 C (89.1 F) |
| 2012 | 27.2 C (81.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1961 | n/a |
| 1962 | n/a |
| 1963 | n/a |
| 1964 | n/a |
| 1965 | n/a |
| 1966 | n/a |
| 1967 | -1.1 C (30.0 F) |
| 1968 | -4.4 C (24.1 F) |
| 1969 | -3.3 C (26.1 F) |
| 1970 | -8.3 C (17.1 F) |
| 1971 | -6.1 C (21.0 F) |
| 1972 | -6.1 C (21.0 F) |
| 1973 | -5.0 C (23.0 F) |
| 1974 | -6.1 C (21.0 F) |
| 1975 | -8.3 C (17.1 F) |
| 1976 | -6.1 C (21.0 F) |
| 1977 | -4.4 C (24.1 F) |
| 1978 | -7.2 C (19.0 F) |
| 1979 | -5.0 C (23.0 F) |
| 1980 | -6.1 C (21.0 F) |
| 1981 | -6.1 C (21.0 F) |
| 1982 | -3.3 C (26.1 F) |
| 1983 | -3.3 C (26.1 F) |
| 1984 | -3.3 C (26.1 F) |
| 1985 | -4.4 C (24.1 F) |
| 1986 | -7.2 C (19.0 F) |
| 1987 | -5.0 C (23.0 F) |
| 1988 | -8.3 C (17.1 F) |
| 1989 | -6.1 C (21.0 F) |
| 1990 | -4.4 C (24.1 F) |
| 1991 | -1.1 C (30.0 F) |
| 1992 | 0.0 C (32.0 F) |
| 1993 | 0.0 C (32.0 F) |
| 1996 | 0.0 C (32.0 F) |
| 1997 | -4.4 C (24.1 F) |
| 1998 | -5.0 C (23.0 F) |
| 1999 | -4.4 C (24.1 F) |
| 2000 | 0.0 C (32.0 F) |
| 2005 | -4.4 C (24.1 F) |
| 2007 | 0.6 C (33.1 F) |
| 2008 | -3.3 C (26.1 F) |
| 2009 | -5.0 C (23.0 F) |
| 2010 | -4.4 C (24.1 F) |
| 2011 | -5.0 C (23.0 F) |
| 2012 | -4.4 C (24.1 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1961 | 31.5 mm (1.2 in) |
| 1962 | 32.8 mm (1.3 in) |
| 1963 | 25.9 mm (1.0 in) |
| 1964 | 31.5 mm (1.2 in) |
| 1965 | 26.9 mm (1.1 in) |
| 1966 | 37.3 mm (1.5 in) |
| 1967 | 72.4 mm (2.9 in) |
| 1968 | 32.3 mm (1.3 in) |
| 1969 | 79.8 mm (3.1 in) |
| 1970 | 33.3 mm (1.3 in) |
| 1971 | 42.4 mm (1.7 in) |
| 1972 | 32.3 mm (1.3 in) |
| 1973 | 42.9 mm (1.7 in) |
| 1974 | 96.8 mm (3.8 in) |
| 1975 | 63.0 mm (2.5 in) |
| 1976 | 58.9 mm (2.3 in) |
| 1977 | 33.3 mm (1.3 in) |
| 1978 | 53.3 mm (2.1 in) |
| 1979 | 49.8 mm (2.0 in) |
| 1980 | 32.3 mm (1.3 in) |
| 1981 | 43.4 mm (1.7 in) |
| 1982 | 83.8 mm (3.3 in) |
| 1983 | 61.5 mm (2.4 in) |
| 1984 | 47.0 mm (1.9 in) |
| 1985 | 47.0 mm (1.9 in) |
| 1986 | 71.9 mm (2.8 in) |
| 1987 | 31.5 mm (1.2 in) |
| 1988 | 63.8 mm (2.5 in) |
| 1989 | 25.9 mm (1.0 in) |
| 1990 | 34.8 mm (1.4 in) |
| 1991 | 45.0 mm (1.8 in) |
| 1992 | 34.8 mm (1.4 in) |
| 1993 | 18.8 mm (0.7 in) |
| 1996 | 24.9 mm (1.0 in) |
| 1997 | 32.8 mm (1.3 in) |
| 1998 | 61.5 mm (2.4 in) |
| 1999 | 140.0 mm (5.5 in) |
| 2000 | 19.8 mm (0.8 in) |
| 2005 | 74.9 mm (2.9 in) |
| 2007 | 79.0 mm (3.1 in) |
| 2008 | 20.8 mm (0.8 in) |
| 2009 | 31.2 mm (1.2 in) |
| 2010 | 20.3 mm (0.8 in) |
| 2011 | 101.9 mm (4.0 in) |
| 2012 | 30.5 mm (1.2 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1961 | 82.8 mm (3.3 in) |
| 1962 | 93.7 mm (3.7 in) |
| 1963 | 79.5 mm (3.1 in) |
| 1964 | 55.4 mm (2.2 in) |
| 1965 | 92.0 mm (3.6 in) |
| 1966 | 78.5 mm (3.1 in) |
| 1967 | 101.5 mm (4.0 in) |
| 1968 | 84.0 mm (3.3 in) |
| 1969 | 116.9 mm (4.6 in) |
| 1970 | 76.0 mm (3.0 in) |
| 1971 | 76.5 mm (3.0 in) |
| 1972 | 59.0 mm (2.3 in) |
| 1973 | 89.3 mm (3.5 in) |
| 1974 | 215.5 mm (8.5 in) |
| 1975 | 113.0 mm (4.4 in) |
| 1976 | 71.2 mm (2.8 in) |
| 1977 | 100.4 mm (4.0 in) |
| 1978 | 86.9 mm (3.4 in) |
| 1979 | 87.9 mm (3.5 in) |
| 1980 | 87.2 mm (3.4 in) |
| 1981 | 100.1 mm (3.9 in) |
| 1982 | 85.1 mm (3.4 in) |
| 1983 | 118.2 mm (4.7 in) |
| 1984 | 105.9 mm (4.2 in) |
| 1985 | 129.3 mm (5.1 in) |
| 1986 | 120.7 mm (4.8 in) |
| 1987 | 67.1 mm (2.6 in) |
| 1988 | 144.3 mm (5.7 in) |
| 1989 | 71.8 mm (2.8 in) |
| 1990 | 52.9 mm (2.1 in) |
| 1991 | 106.2 mm (4.2 in) |
| 1992 | 83.6 mm (3.3 in) |
| 1993 | 33.6 mm (1.3 in) |
| 1996 | 58.5 mm (2.3 in) |
| 1997 | 84.8 mm (3.3 in) |
| 1998 | 183.4 mm (7.2 in) |
| 1999 | 236.8 mm (9.3 in) |
| 2000 | 53.3 mm (2.1 in) |
| 2005 | 164.8 mm (6.5 in) |
| 2007 | 82.1 mm (3.2 in) |
| 2008 | 62.5 mm (2.5 in) |
| 2009 | 113.8 mm (4.5 in) |
| 2010 | 55.9 mm (2.2 in) |
| 2011 | 149.2 mm (5.9 in) |
| 2012 | 78.8 mm (3.1 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1961 | 36 days |
| 1962 | 47 days |
| 1963 | 58 days |
| 1964 | 37 days |
| 1965 | 28 days |
| 1966 | 35 days |
| 1967 | 44 days |
| 1968 | 37 days |
| 1969 | 35 days |
| 1970 | 76 days |
| 1971 | 61 days |
| 1972 | 41 days |
| 1973 | 55 days |
| 1974 | 41 days |
| 1975 | 57 days |
| 1976 | 32 days |
| 1977 | 80 days |
| 1978 | 37 days |
| 1979 | 32 days |
| 1980 | 34 days |
| 1981 | 37 days |
| 1982 | 56 days |
| 1983 | 56 days |
| 1984 | 32 days |
| 1985 | 55 days |
| 1986 | 106 days |
| 1987 | 63 days |
| 1988 | 30 days |
| 1989 | 37 days |
| 1990 | 32 days |
| 1991 | 57 days |
| 1992 | 31 days |
| 1993 | 85 days |
| 1996 | 34 days |
| 1997 | 28 days |
| 1998 | 78 days |
| 1999 | 43 days |
| 2000 | 45 days |
| 2005 | 61 days |
| 2007 | 41 days |
| 2008 | 58 days |
| 2009 | 29 days |
| 2010 | 28 days |
| 2011 | 44 days |
| 2012 | 43 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
22 years with a frostAcross 22 years with a frost, the median last spring frost at San Lorenzo Sayula falls on 1 March and the median first autumn frost on 5 November, which leaves a median of 243 days between them.
| Measure | Median, all years | Earliest period | Recent period (1969 to 2011) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 1 March | n/a | 1 March | n/a | n/a |
| First autumn frost | 5 November | n/a | 5 November | n/a | n/a |
| Growing days | 243 days | n/a | 243 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
42 years, 1961 to 2012A day with at least 42.9 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 155.1 mm (6.1 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 42.9 mm (1.7 in) | |
| 5 years | 63.8 mm (2.5 in) | |
| 10 years | 80.7 mm (3.2 in) | |
| 25 years | 106.4 mm (4.2 in) | |
| 50 years | 129.0 mm (5.1 in) | Longer than the 42 years of record |
| 100 years | 155.1 mm (6.1 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 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: 140.0 mm (5.5 in) in 1999; 101.9 mm (4.0 in) in 2011; 96.8 mm (3.8 in) in 1974.
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).