Ahuatepec Weather Records (MXN00021007)
Record envelope, standing records and threshold days for Ahuatepec (MXN00021007), Mexico, with 60 years of record.
Key Facts for Ahuatepec
- Ahuatepec (MXN00021007) is a weather station in Mexico at 18.87 latitude and -97.92 longitude, 2,026 m (6,646 ft) above sea level.
- The station reports from 1950 to 2009, 60 years of record.
- 1,464 records set at Ahuatepec still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Ahuatepec tied a daily record high maximum temperature of 27.8 C (82.0 F) on 30 December 2009.
About the Station
- Location: Mexico, 18.87 latitude, -97.92 longitude.
- Elevation: 2,026 m (6,646 ft).
- Period of record: 1950 to 2009, 60 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 | 32.8 C (91.0 F) | -6.1 C (21.0 F) | n/a | n/a |
| Feb | 33.9 C (93.0 F) | -5.0 C (23.0 F) | n/a | n/a |
| Mar | 35.6 C (96.1 F) | -1.7 C (28.9 F) | n/a | n/a |
| Apr | 38.9 C (102.0 F) | 0.0 C (32.0 F) | n/a | n/a |
| May | 40.0 C (104.0 F) | 0.6 C (33.1 F) | n/a | n/a |
| Jun | 40.6 C (105.1 F) | 0.0 C (32.0 F) | n/a | n/a |
| Jul | 35.0 C (95.0 F) | 0.6 C (33.1 F) | n/a | n/a |
| Aug | 32.8 C (91.0 F) | 1.7 C (35.1 F) | n/a | n/a |
| Sep | 33.9 C (93.0 F) | 0.6 C (33.1 F) | n/a | n/a |
| Oct | 32.8 C (91.0 F) | -5.0 C (23.0 F) | n/a | n/a |
| Nov | 31.7 C (89.1 F) | -6.1 C (21.0 F) | n/a | n/a |
| Dec | 31.7 C (89.1 F) | -5.0 C (23.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1951 | 69 |
| 1952 | 161 |
| 1953 | 115 |
| 1954 | 84 |
| 1955 | 81 |
| 1956 | 65 |
| 1957 | 3 |
| 1958 | 28 |
| 1959 | 7 |
| 1960 | 3 |
| 1961 | 9 |
| 1962 | 7 |
| 1963 | 7 |
| 1964 | 42 |
| 1965 | 83 |
| 1966 | 24 |
| 1967 | 9 |
| 1968 | 12 |
| 1969 | 8 |
| 1970 | 7 |
| 1971 | 3 |
| 1972 | 4 |
| 1973 | 4 |
| 1974 | 3 |
| 1975 | 1 |
| 1976 | 10 |
| 1977 | 9 |
| 1978 | 9 |
| 1979 | 5 |
| 1980 | 11 |
| 1981 | 6 |
| 1982 | 21 |
| 1983 | 31 |
| 1984 | 3 |
| 1985 | 8 |
| 1986 | 8 |
| 1987 | 2 |
| 1988 | 22 |
| 1990 | 10 |
| 1991 | 20 |
| 1992 | 12 |
| 1993 | 5 |
| 1994 | 15 |
| 1995 | 9 |
| 1996 | 6 |
| 1997 | 13 |
| 1998 | 61 |
| 1999 | 51 |
| 2000 | 11 |
| 2001 | 16 |
| 2002 | 52 |
| 2003 | 33 |
| 2004 | 6 |
| 2005 | 23 |
| 2006 | 23 |
| 2007 | 81 |
| 2008 | 7 |
| 2009 | 26 |
All-Time Record Progression
10 new records| Date | Kind | Detail |
|---|---|---|
| 1996-06-22 | Record daily precipitation | Record daily precipitation 78.0 mm (3.1 in) |
| 1998-05-05 | Record high maximum temperature | Record high maximum temperature 36.7 C (98.1 F) |
| 1998-08-03 | Record high minimum temperature | Record high minimum temperature 17.8 C (64.0 F) |
| 1998-08-11 | Record high minimum temperature | Record high minimum temperature 18.9 C (66.0 F) |
| 1998-08-15 | Record high minimum temperature | Record high minimum temperature 20.6 C (69.1 F) |
| 1999-08-22 | Record daily precipitation | Record daily precipitation 81.8 mm (3.2 in) |
| 2000-05-13 | Record high maximum temperature | Record high maximum temperature 38.9 C (102.0 F) |
| 2007-05-06 | Record high maximum temperature | Record high maximum temperature 39.4 C (102.9 F) |
| 2007-05-11 | Record high maximum temperature | Record high maximum temperature 40.0 C (104.0 F) |
| 2007-06-15 | Record high maximum temperature | Record high maximum temperature 40.6 C (105.1 F) |
Wettest Day of Each Month
Aug: 81.8 mm (3.2 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 35.6 mm (1.4 in) | 11 January 1984 |
| Feb | 30.0 mm (1.2 in) | 25 February 1982 |
| Mar | 27.9 mm (1.1 in) | 18 March 1997 |
| Apr | 69.9 mm (2.8 in) | 25 April 1995 |
| May | 65.3 mm (2.6 in) | 19 May 1958 |
| Jun | 78.0 mm (3.1 in) | 22 June 1996 |
| Jul | 63.0 mm (2.5 in) | 17 July 1980 |
| Aug | 81.8 mm (3.2 in) | 22 August 1999 |
| Sep | 68.8 mm (2.7 in) | 4 September 1988 |
| Oct | 59.9 mm (2.4 in) | 6 October 2004 |
| Nov | 49.3 mm (1.9 in) | 4 November 1952 |
| Dec | 21.1 mm (0.8 in) | 12 December 1958 |
Period of Record Coverage
1951 to 2009| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1951 | 158 | 43% | No |
| 1952 | 366 | 100% | Yes |
| 1953 | 364 | 100% | Yes |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 338 | 92% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 337 | 92% | Yes |
| 1959 | 364 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 334 | 92% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 273 | 75% | No |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 364 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 364 | 99% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 363 | 99% | Yes |
| 1987 | 120 | 33% | No |
| 1988 | 365 | 100% | Yes |
| 1990 | 301 | 82% | No |
| 1991 | 364 | 100% | Yes |
| 1992 | 362 | 99% | Yes |
| 1993 | 332 | 91% | Yes |
| 1994 | 364 | 100% | Yes |
| 1995 | 334 | 92% | Yes |
| 1996 | 275 | 75% | No |
| 1997 | 364 | 100% | Yes |
| 1998 | 335 | 92% | Yes |
| 1999 | 335 | 92% | Yes |
| 2000 | 304 | 83% | No |
| 2001 | 363 | 99% | Yes |
| 2002 | 364 | 100% | Yes |
| 2003 | 363 | 99% | Yes |
| 2004 | 121 | 33% | No |
| 2005 | 363 | 99% | Yes |
| 2006 | 347 | 95% | Yes |
| 2007 | 348 | 95% | Yes |
| 2008 | 290 | 79% | No |
| 2009 | 359 | 98% | Yes |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 30 December 2009 | Ahuatepec, MX | daily high max (Tie) | 27.8 C (82.0 F) | tie | 42 years | 4 of 100 (Routine) |
| 28 December 2009 | Ahuatepec, MX | daily high max | 30.0 C (86.0 F) | 1.1 C (2.0 F) | 4 years | 9 of 100 (Routine) |
| 25 December 2009 | Ahuatepec, MX | daily low min (Tie) | 0.6 C (33.1 F) | tie | 55 years | 5 of 100 (Routine) |
| 17 December 2009 | Ahuatepec, MX | daily rain | 6.4 mm (0.25 in) | 4.1 mm (0.16 in) | 52 years | 20 of 100 (Routine) |
| 15 December 2009 | Ahuatepec, MX | monthly high max | 31.7 C (89.1 F) | 1.1 C (2.0 F) | 0 years | 18 of 100 (Routine) |
| 13 December 2009 | Ahuatepec, MX | daily high max | 30.0 C (86.0 F) | 1.1 C (2.0 F) | 4 years | 9 of 100 (Routine) |
| 11 December 2009 | Ahuatepec, MX | daily high max | 30.0 C (86.0 F) | 1.1 C (2.0 F) | 8 years | 10 of 100 (Routine) |
| 10 December 2009 | Ahuatepec, MX | monthly high max (Tie) | 30.6 C (87.1 F) | tie | 0 years | 3 of 100 (Routine) |
| 9 December 2009 | Ahuatepec, MX | daily high max | 30.0 C (86.0 F) | 1.1 C (2.0 F) | 16 years | 13 of 100 (Routine) |
| 8 December 2009 | Ahuatepec, MX | daily high max | 30.0 C (86.0 F) | 1.1 C (2.0 F) | 11 years | 11 of 100 (Routine) |
| 7 December 2009 | Ahuatepec, MX | monthly high max | 30.6 C (87.1 F) | 0.6 C (1.1 F) | 18 years | 21 of 100 (Routine) |
| 2 December 2009 | Ahuatepec, MX | daily high min | 13.9 C (57.0 F) | 2.2 C (4.0 F) | 44 years | 25 of 100 (Routine) |
| 18 November 2009 | Ahuatepec, MX | daily high max (Tie) | 30.6 C (87.1 F) | tie | 6 years | 1 of 100 (Routine) |
| 17 November 2009 | Ahuatepec, MX | daily high max | 30.6 C (87.1 F) | 0.6 C (1.1 F) | 20 years | 12 of 100 (Routine) |
| 16 November 2009 | Ahuatepec, MX | daily high max | 30.6 C (87.1 F) | 0.6 C (1.1 F) | 6 years | 7 of 100 (Routine) |
| 28 October 2009 | Ahuatepec, MX | daily high min (Tie) | 12.8 C (55.0 F) | tie | 28 years | 3 of 100 (Routine) |
| 16 October 2009 | Ahuatepec, MX | daily high max (Tie) | 30.0 C (86.0 F) | tie | 30 years | 3 of 100 (Routine) |
| 15 October 2009 | Ahuatepec, MX | daily high max (Tie) | 30.0 C (86.0 F) | tie | 7 years | 1 of 100 (Routine) |
| 10 October 2009 | Ahuatepec, MX | daily high min | 13.3 C (55.9 F) | 0.5 C (0.9 F) | 44 years | 19 of 100 (Routine) |
| 9 October 2009 | Ahuatepec, MX | daily high min (Tie) | 13.9 C (57.0 F) | tie | 44 years | 4 of 100 (Routine) |
Climate Trend
43 complete years, 1952 to 2009| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1952 | 11.2 C | -5.74 C |
| 1953 | 11.4 C | -5.56 C |
| 1954 | 11.6 C | -5.39 C |
| 1955 | 11.6 C | -5.35 C |
| 1957 | 15.4 C | -1.56 C |
| 1959 | 17.1 C | +0.10 C |
| 1960 | 17.2 C | +0.21 C |
| 1961 | 17.0 C | -0.02 C |
| 1962 | 17.2 C | +0.27 C |
| 1964 | 17.8 C | +0.82 C |
| 1965 | 18.7 C | +1.68 C |
| 1967 | 16.6 C | -0.38 C |
| 1968 | 17.0 C | 0.00 C |
| 1969 | 17.7 C | +0.75 C |
| 1970 | 17.1 C | +0.13 C |
| 1971 | 17.1 C | +0.11 C |
| 1972 | 17.4 C | +0.38 C |
| 1973 | 17.3 C | +0.35 C |
| 1974 | 17.0 C | +0.05 C |
| 1975 | 16.7 C | -0.25 C |
| 1976 | 16.8 C | -0.17 C |
| 1977 | 17.1 C | +0.12 C |
| 1978 | 17.0 C | -0.01 C |
| 1979 | 16.8 C | -0.13 C |
| 1980 | 17.6 C | +0.64 C |
| 1981 | 17.4 C | +0.43 C |
| 1982 | 18.1 C | +1.12 C |
| 1983 | 18.2 C | +1.21 C |
| 1984 | 17.4 C | +0.44 C |
| 1985 | 17.4 C | +0.39 C |
| 1986 | 17.3 C | +0.32 C |
| 1988 | 17.8 C | +0.81 C |
| 1991 | 18.1 C | +1.13 C |
| 1992 | 17.6 C | +0.64 C |
| 1994 | 18.5 C | +1.50 C |
| 1997 | 18.1 C | +1.10 C |
| 2001 | 17.7 C | +0.77 C |
| 2002 | 19.3 C | +2.28 C |
| 2003 | 18.6 C | +1.62 C |
| 2005 | 18.8 C | +1.79 C |
| 2006 | 18.2 C | +1.18 C |
| 2007 | 18.0 C | +0.98 C |
| 2009 | 18.3 C | +1.35 C |
The annual mean temperature here has risen by 0.8 C (0.5 to 1.1) per decade over 1952 to 2009. In Fahrenheit: 1.4 F (0.9 to 1.9) per decade. The slope is a straight line fitted to 43 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.8 C (0.5 to 1.1) per decade | 1.4 F (0.9 to 1.9) per decade | 1952 to 2009 | 43 | Rise |
| Mean daily maximum | 1.0 C (0.7 to 1.3) per decade | 1.9 F (1.3 to 2.4) per decade | 1952 to 2009 | 43 | Rise |
| Mean daily minimum | 0.5 C (0.3 to 0.8) per decade | 1.0 F (0.5 to 1.4) per decade | 1952 to 2009 | 43 | 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
1950 to 2009| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 40.6 C (105.1 F) | 2007 | 33.3 C (91.9 F) | 58 |
| Coldest night (TNn) | -6.1 C (21.0 F) | 1966 | 0.0 C (32.0 F) | 58 |
| Wettest day (Rx1day) | 81.8 mm (3.2 in) | 1999 | 44.5 mm (1.8 in) | 59 |
| Wettest five days (Rx5day) | 186.7 mm (7.4 in) | 1996 | 97.6 mm (3.8 in) | 59 |
| Longest dry spell (CDD) | 162 days | 2000 | 77 days | 59 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1950 | n/a |
| 1951 | 22.8 C (73.0 F) |
| 1952 | 23.3 C (73.9 F) |
| 1953 | 25.0 C (77.0 F) |
| 1954 | 23.3 C (73.9 F) |
| 1955 | 25.0 C (77.0 F) |
| 1956 | 28.3 C (82.9 F) |
| 1957 | 28.9 C (84.0 F) |
| 1958 | 31.7 C (89.1 F) |
| 1959 | 31.1 C (88.0 F) |
| 1960 | 33.3 C (91.9 F) |
| 1961 | 31.7 C (89.1 F) |
| 1962 | 32.8 C (91.0 F) |
| 1963 | 35.0 C (95.0 F) |
| 1964 | 32.8 C (91.0 F) |
| 1965 | 32.8 C (91.0 F) |
| 1966 | 30.6 C (87.1 F) |
| 1967 | 32.8 C (91.0 F) |
| 1968 | 32.8 C (91.0 F) |
| 1969 | 32.8 C (91.0 F) |
| 1970 | 33.9 C (93.0 F) |
| 1971 | 33.3 C (91.9 F) |
| 1972 | 33.3 C (91.9 F) |
| 1973 | 33.9 C (93.0 F) |
| 1974 | 33.9 C (93.0 F) |
| 1975 | 33.3 C (91.9 F) |
| 1976 | 32.8 C (91.0 F) |
| 1977 | 35.6 C (96.1 F) |
| 1978 | 33.9 C (93.0 F) |
| 1979 | 32.8 C (91.0 F) |
| 1980 | 34.4 C (93.9 F) |
| 1981 | 33.9 C (93.0 F) |
| 1982 | 32.8 C (91.0 F) |
| 1983 | 32.8 C (91.0 F) |
| 1984 | 31.7 C (89.1 F) |
| 1985 | 31.7 C (89.1 F) |
| 1986 | 30.0 C (86.0 F) |
| 1987 | 31.1 C (88.0 F) |
| 1988 | 32.8 C (91.0 F) |
| 1990 | 33.3 C (91.9 F) |
| 1991 | 35.0 C (95.0 F) |
| 1992 | 32.8 C (91.0 F) |
| 1993 | 33.9 C (93.0 F) |
| 1994 | 33.9 C (93.0 F) |
| 1995 | 33.9 C (93.0 F) |
| 1996 | 35.0 C (95.0 F) |
| 1997 | 35.0 C (95.0 F) |
| 1998 | 36.7 C (98.1 F) |
| 1999 | 35.6 C (96.1 F) |
| 2000 | 38.9 C (102.0 F) |
| 2001 | 35.0 C (95.0 F) |
| 2002 | 35.0 C (95.0 F) |
| 2003 | 35.6 C (96.1 F) |
| 2004 | 33.9 C (93.0 F) |
| 2005 | 35.0 C (95.0 F) |
| 2006 | 36.7 C (98.1 F) |
| 2007 | 40.6 C (105.1 F) |
| 2008 | 35.0 C (95.0 F) |
| 2009 | 34.4 C (93.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1950 | n/a |
| 1951 | -5.0 C (23.0 F) |
| 1952 | -5.0 C (23.0 F) |
| 1953 | -5.0 C (23.0 F) |
| 1954 | -2.2 C (28.0 F) |
| 1955 | -1.7 C (28.9 F) |
| 1956 | -2.2 C (28.0 F) |
| 1957 | -0.6 C (30.9 F) |
| 1958 | 0.0 C (32.0 F) |
| 1959 | 0.6 C (33.1 F) |
| 1960 | 0.0 C (32.0 F) |
| 1961 | -3.3 C (26.1 F) |
| 1962 | 0.6 C (33.1 F) |
| 1963 | -2.2 C (28.0 F) |
| 1964 | 2.8 C (37.0 F) |
| 1965 | 2.8 C (37.0 F) |
| 1966 | -6.1 C (21.0 F) |
| 1967 | -4.4 C (24.1 F) |
| 1968 | -5.0 C (23.0 F) |
| 1969 | 0.6 C (33.1 F) |
| 1970 | -2.2 C (28.0 F) |
| 1971 | -1.1 C (30.0 F) |
| 1972 | 1.1 C (34.0 F) |
| 1973 | -4.4 C (24.1 F) |
| 1974 | -5.0 C (23.0 F) |
| 1975 | 0.0 C (32.0 F) |
| 1976 | -4.4 C (24.1 F) |
| 1977 | 0.0 C (32.0 F) |
| 1978 | 0.0 C (32.0 F) |
| 1979 | -2.2 C (28.0 F) |
| 1980 | -4.4 C (24.1 F) |
| 1981 | 0.0 C (32.0 F) |
| 1982 | 1.7 C (35.1 F) |
| 1983 | -5.0 C (23.0 F) |
| 1984 | -1.1 C (30.0 F) |
| 1985 | -6.1 C (21.0 F) |
| 1986 | 0.0 C (32.0 F) |
| 1987 | 1.7 C (35.1 F) |
| 1988 | 0.6 C (33.1 F) |
| 1990 | -1.1 C (30.0 F) |
| 1991 | 1.7 C (35.1 F) |
| 1992 | 0.0 C (32.0 F) |
| 1993 | 1.7 C (35.1 F) |
| 1994 | 0.6 C (33.1 F) |
| 1995 | 0.0 C (32.0 F) |
| 1996 | 0.0 C (32.0 F) |
| 1997 | -2.2 C (28.0 F) |
| 1998 | 0.0 C (32.0 F) |
| 1999 | 0.0 C (32.0 F) |
| 2000 | 0.0 C (32.0 F) |
| 2001 | 0.0 C (32.0 F) |
| 2002 | 2.8 C (37.0 F) |
| 2003 | 0.0 C (32.0 F) |
| 2004 | 0.6 C (33.1 F) |
| 2005 | -2.2 C (28.0 F) |
| 2006 | 0.0 C (32.0 F) |
| 2007 | 2.8 C (37.0 F) |
| 2008 | -1.7 C (28.9 F) |
| 2009 | -1.1 C (30.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1950 | 51.8 mm (2.0 in) |
| 1951 | 39.9 mm (1.6 in) |
| 1952 | 60.5 mm (2.4 in) |
| 1953 | 41.1 mm (1.6 in) |
| 1954 | 48.3 mm (1.9 in) |
| 1955 | 33.3 mm (1.3 in) |
| 1956 | 48.0 mm (1.9 in) |
| 1957 | 36.3 mm (1.4 in) |
| 1958 | 65.3 mm (2.6 in) |
| 1959 | 44.2 mm (1.7 in) |
| 1960 | 33.0 mm (1.3 in) |
| 1961 | 31.0 mm (1.2 in) |
| 1962 | 70.9 mm (2.8 in) |
| 1963 | 38.9 mm (1.5 in) |
| 1964 | 32.8 mm (1.3 in) |
| 1965 | 30.0 mm (1.2 in) |
| 1966 | 63.0 mm (2.5 in) |
| 1967 | 55.9 mm (2.2 in) |
| 1968 | 57.9 mm (2.3 in) |
| 1969 | 35.8 mm (1.4 in) |
| 1970 | 37.3 mm (1.5 in) |
| 1971 | 51.8 mm (2.0 in) |
| 1972 | 52.8 mm (2.1 in) |
| 1973 | 42.4 mm (1.7 in) |
| 1974 | 47.8 mm (1.9 in) |
| 1975 | 49.3 mm (1.9 in) |
| 1976 | 49.8 mm (2.0 in) |
| 1977 | 37.3 mm (1.5 in) |
| 1978 | 56.9 mm (2.2 in) |
| 1979 | 44.5 mm (1.8 in) |
| 1980 | 65.5 mm (2.6 in) |
| 1981 | 62.0 mm (2.4 in) |
| 1982 | 49.3 mm (1.9 in) |
| 1983 | 39.4 mm (1.6 in) |
| 1984 | 35.6 mm (1.4 in) |
| 1985 | 45.0 mm (1.8 in) |
| 1986 | 33.8 mm (1.3 in) |
| 1987 | 7.9 mm (0.31 in) |
| 1988 | 68.8 mm (2.7 in) |
| 1990 | 50.3 mm (2.0 in) |
| 1991 | 39.9 mm (1.6 in) |
| 1992 | 39.9 mm (1.6 in) |
| 1993 | 36.3 mm (1.4 in) |
| 1994 | 39.9 mm (1.6 in) |
| 1995 | 69.9 mm (2.8 in) |
| 1996 | 78.0 mm (3.1 in) |
| 1997 | 51.1 mm (2.0 in) |
| 1998 | 37.8 mm (1.5 in) |
| 1999 | 81.8 mm (3.2 in) |
| 2000 | 45.0 mm (1.8 in) |
| 2001 | 59.9 mm (2.4 in) |
| 2002 | 36.8 mm (1.4 in) |
| 2003 | 67.1 mm (2.6 in) |
| 2004 | 59.9 mm (2.4 in) |
| 2005 | 39.9 mm (1.6 in) |
| 2006 | 41.9 mm (1.6 in) |
| 2007 | 25.4 mm (1.0 in) |
| 2008 | 21.8 mm (0.9 in) |
| 2009 | 42.4 mm (1.7 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1950 | 100.8 mm (4.0 in) |
| 1951 | 78.2 mm (3.1 in) |
| 1952 | 98.4 mm (3.9 in) |
| 1953 | 54.7 mm (2.2 in) |
| 1954 | 104.9 mm (4.1 in) |
| 1955 | 82.4 mm (3.2 in) |
| 1956 | 102.7 mm (4.0 in) |
| 1957 | 51.6 mm (2.0 in) |
| 1958 | 106.5 mm (4.2 in) |
| 1959 | 117.1 mm (4.6 in) |
| 1960 | 69.5 mm (2.7 in) |
| 1961 | 86.7 mm (3.4 in) |
| 1962 | 124.8 mm (4.9 in) |
| 1963 | 79.8 mm (3.1 in) |
| 1964 | 58.4 mm (2.3 in) |
| 1965 | 52.6 mm (2.1 in) |
| 1966 | 111.0 mm (4.4 in) |
| 1967 | 95.5 mm (3.8 in) |
| 1968 | 78.9 mm (3.1 in) |
| 1969 | 114.5 mm (4.5 in) |
| 1970 | 95.8 mm (3.8 in) |
| 1971 | 85.9 mm (3.4 in) |
| 1972 | 138.1 mm (5.4 in) |
| 1973 | 80.8 mm (3.2 in) |
| 1974 | 90.7 mm (3.6 in) |
| 1975 | 113.3 mm (4.5 in) |
| 1976 | 112.7 mm (4.4 in) |
| 1977 | 89.1 mm (3.5 in) |
| 1978 | 142.2 mm (5.6 in) |
| 1979 | 86.4 mm (3.4 in) |
| 1980 | 124.5 mm (4.9 in) |
| 1981 | 127.6 mm (5.0 in) |
| 1982 | 126.5 mm (5.0 in) |
| 1983 | 117.9 mm (4.6 in) |
| 1984 | 82.8 mm (3.3 in) |
| 1985 | 113.4 mm (4.5 in) |
| 1986 | 50.8 mm (2.0 in) |
| 1987 | 7.9 mm (0.31 in) |
| 1988 | 136.6 mm (5.4 in) |
| 1990 | 63.3 mm (2.5 in) |
| 1991 | 118.5 mm (4.7 in) |
| 1992 | 55.6 mm (2.2 in) |
| 1993 | 73.4 mm (2.9 in) |
| 1994 | 72.2 mm (2.8 in) |
| 1995 | 87.9 mm (3.5 in) |
| 1996 | 186.7 mm (7.4 in) |
| 1997 | 111.3 mm (4.4 in) |
| 1998 | 137.8 mm (5.4 in) |
| 1999 | 134.4 mm (5.3 in) |
| 2000 | 73.4 mm (2.9 in) |
| 2001 | 98.3 mm (3.9 in) |
| 2002 | 55.2 mm (2.2 in) |
| 2003 | 130.1 mm (5.1 in) |
| 2004 | 106.9 mm (4.2 in) |
| 2005 | 97.6 mm (3.8 in) |
| 2006 | 97.8 mm (3.9 in) |
| 2007 | 51.0 mm (2.0 in) |
| 2008 | 43.4 mm (1.7 in) |
| 2009 | 134.3 mm (5.3 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1950 | 61 days |
| 1951 | 72 days |
| 1952 | 61 days |
| 1953 | 90 days |
| 1954 | 50 days |
| 1955 | 85 days |
| 1956 | 46 days |
| 1957 | 46 days |
| 1958 | 48 days |
| 1959 | 99 days |
| 1960 | 99 days |
| 1961 | 69 days |
| 1962 | 101 days |
| 1963 | 117 days |
| 1964 | 79 days |
| 1965 | 43 days |
| 1966 | 74 days |
| 1967 | 69 days |
| 1968 | 37 days |
| 1969 | 71 days |
| 1970 | 85 days |
| 1971 | 77 days |
| 1972 | 36 days |
| 1973 | 59 days |
| 1974 | 49 days |
| 1975 | 65 days |
| 1976 | 59 days |
| 1977 | 61 days |
| 1978 | 54 days |
| 1979 | 62 days |
| 1980 | 38 days |
| 1981 | 33 days |
| 1982 | 60 days |
| 1983 | 105 days |
| 1984 | 91 days |
| 1985 | 78 days |
| 1986 | 59 days |
| 1987 | 119 days |
| 1988 | 88 days |
| 1990 | 82 days |
| 1991 | 112 days |
| 1992 | 105 days |
| 1993 | 73 days |
| 1994 | 99 days |
| 1995 | 114 days |
| 1996 | 127 days |
| 1997 | 85 days |
| 1998 | 145 days |
| 1999 | 151 days |
| 2000 | 162 days |
| 2001 | 111 days |
| 2002 | 100 days |
| 2003 | 144 days |
| 2004 | 76 days |
| 2005 | 81 days |
| 2006 | 118 days |
| 2007 | 43 days |
| 2008 | 88 days |
| 2009 | 62 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
50 years, 1951 to 2009A day with at least 44.4 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 90.0 mm (3.5 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 44.4 mm (1.7 in) | |
| 5 years | 56.1 mm (2.2 in) | |
| 10 years | 64.0 mm (2.5 in) | |
| 25 years | 74.3 mm (2.9 in) | |
| 50 years | 82.1 mm (3.2 in) | |
| 100 years | 90.0 mm (3.5 in) | Longer than the 50 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, 50 years of values from 1951 to 2009.
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: 81.8 mm (3.2 in) in 1999; 70.9 mm (2.8 in) in 1962; 69.9 mm (2.8 in) in 1995.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of Ahuatepec, at 1965. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1965 ran 1.3 C (2.3 F) higher than in the years before (possible change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1965 | +1.3 | +2.3 | possible | 5 |
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
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).