San Juan de Aragon Weather Records (MXN00009043)
Record envelope, standing records and threshold days for San Juan de Aragon (MXN00009043), Mexico, with 60 years of record.
Key Facts for San Juan de Aragon
- San Juan de Aragon (MXN00009043) is a weather station in Mexico at 19.45 latitude and -99.07 longitude, 2,240 m (7,349 ft) above sea level.
- The station reports from 1953 to 2012, 60 years of record.
- 1,464 records set at San Juan de Aragon still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- San Juan de Aragon tied a daily record high maximum temperature of 27.8 C (82.0 F) on 17 December 2012.
About the Station
- Location: Mexico, 19.45 latitude, -99.07 longitude.
- Elevation: 2,240 m (7,349 ft).
- Period of record: 1953 to 2012, 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 | 30.0 C (86.0 F) | -8.9 C (16.0 F) | n/a | n/a |
| Feb | 32.2 C (90.0 F) | -6.7 C (19.9 F) | n/a | n/a |
| Mar | 38.3 C (100.9 F) | -2.8 C (27.0 F) | n/a | n/a |
| Apr | 35.6 C (96.1 F) | -2.2 C (28.0 F) | n/a | n/a |
| May | 35.6 C (96.1 F) | 2.2 C (36.0 F) | n/a | n/a |
| Jun | 35.6 C (96.1 F) | 5.0 C (41.0 F) | n/a | n/a |
| Jul | 30.0 C (86.0 F) | 5.0 C (41.0 F) | n/a | n/a |
| Aug | 30.0 C (86.0 F) | 3.9 C (39.0 F) | n/a | n/a |
| Sep | 31.1 C (88.0 F) | 2.2 C (36.0 F) | n/a | n/a |
| Oct | 31.1 C (88.0 F) | -0.6 C (30.9 F) | n/a | n/a |
| Nov | 30.6 C (87.1 F) | -5.6 C (21.9 F) | n/a | n/a |
| Dec | 29.4 C (84.9 F) | -5.6 C (21.9 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1953 | 32 |
| 1954 | 29 |
| 1955 | 52 |
| 1956 | 57 |
| 1957 | 36 |
| 1958 | 24 |
| 1959 | 22 |
| 1960 | 36 |
| 1961 | 29 |
| 1962 | 28 |
| 1963 | 21 |
| 1964 | 16 |
| 1965 | 24 |
| 1966 | 38 |
| 1967 | 22 |
| 1968 | 21 |
| 1969 | 13 |
| 1970 | 16 |
| 1971 | 13 |
| 1972 | 16 |
| 1973 | 16 |
| 1974 | 16 |
| 1975 | 18 |
| 1976 | 21 |
| 1977 | 36 |
| 1978 | 30 |
| 1979 | 34 |
| 1980 | 27 |
| 1981 | 30 |
| 1982 | 32 |
| 1983 | 42 |
| 1984 | 19 |
| 1985 | 17 |
| 1986 | 21 |
| 1987 | 74 |
| 1988 | 24 |
| 1991 | 38 |
| 1992 | 11 |
| 1993 | 17 |
| 1994 | 14 |
| 1995 | 30 |
| 1996 | 15 |
| 1997 | 25 |
| 1998 | 57 |
| 1999 | 21 |
| 2000 | 12 |
| 2001 | 22 |
| 2002 | 24 |
| 2003 | 22 |
| 2004 | 15 |
| 2005 | 41 |
| 2006 | 21 |
| 2007 | 18 |
| 2008 | 22 |
| 2011 | 16 |
| 2012 | 21 |
All-Time Record Progression
5 new records| Date | Kind | Detail |
|---|---|---|
| 1983-05-18 | Record high minimum temperature | Record high minimum temperature 15.6 C (60.1 F) |
| 1983-06-05 | Record high minimum temperature | Record high minimum temperature 16.7 C (62.1 F) |
| 1984-09-04 | Record daily precipitation | Record daily precipitation 62.2 mm (2.4 in) |
| 1986-03-17 | Record high maximum temperature | Record high maximum temperature 38.3 C (100.9 F) |
| 2002-09-19 | Record daily precipitation | Record daily precipitation 71.9 mm (2.8 in) |
Wettest Day of Each Month
Sep: 71.9 mm (2.8 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 41.4 mm (1.6 in) | 10 January 1967 |
| Feb | 24.4 mm (1.0 in) | 26 February 1991 |
| Mar | 33.8 mm (1.3 in) | 4 March 1988 |
| Apr | 38.4 mm (1.5 in) | 13 April 1962 |
| May | 46.0 mm (1.8 in) | 25 May 1995 |
| Jun | 59.9 mm (2.4 in) | 30 June 2011 |
| Jul | 63.0 mm (2.5 in) | 31 July 2007 |
| Aug | 59.9 mm (2.4 in) | 14 August 1980 |
| Sep | 71.9 mm (2.8 in) | 19 September 2002 |
| Oct | 65.3 mm (2.6 in) | 11 October 2002 |
| Nov | 25.9 mm (1.0 in) | 10 November 1958 |
| Dec | 27.2 mm (1.1 in) | 30 December 1995 |
Period of Record Coverage
1953 to 2012| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1953 | 196 | 54% | No |
| 1954 | 365 | 100% | Yes |
| 1955 | 365 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 334 | 92% | Yes |
| 1959 | 364 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 364 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 364 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 332 | 91% | Yes |
| 1970 | 365 | 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 | 361 | 99% | 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 | 365 | 100% | Yes |
| 1987 | 364 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1991 | 304 | 83% | No |
| 1992 | 91 | 25% | No |
| 1993 | 339 | 93% | Yes |
| 1994 | 333 | 91% | Yes |
| 1995 | 350 | 96% | Yes |
| 1996 | 366 | 100% | Yes |
| 1997 | 365 | 100% | Yes |
| 1998 | 335 | 92% | Yes |
| 1999 | 365 | 100% | Yes |
| 2000 | 336 | 92% | Yes |
| 2001 | 363 | 99% | Yes |
| 2002 | 356 | 98% | Yes |
| 2003 | 364 | 100% | Yes |
| 2004 | 365 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 363 | 99% | Yes |
| 2008 | 352 | 96% | Yes |
| 2010 | 31 | 8% | No |
| 2011 | 333 | 91% | Yes |
| 2012 | 365 | 100% | Yes |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 17 December 2012 | San Juan de Aragon, MX | daily high max (Tie) | 27.8 C (82.0 F) | tie | 47 years | 5 of 100 (Routine) |
| 12 December 2012 | San Juan de Aragon, MX | daily high min (Tie) | 9.4 C (48.9 F) | tie | 34 years | 4 of 100 (Routine) |
| 10 December 2012 | San Juan de Aragon, MX | daily high max (Tie) | 26.7 C (80.1 F) | tie | 40 years | 4 of 100 (Routine) |
| 9 December 2012 | San Juan de Aragon, MX | daily high max (Tie) | 26.7 C (80.1 F) | tie | 29 years | 3 of 100 (Routine) |
| 14 November 2012 | San Juan de Aragon, MX | daily high min (Tie) | 10.0 C (50.0 F) | tie | 19 years | 2 of 100 (Routine) |
| 6 November 2012 | San Juan de Aragon, MX | daily high min | 12.8 C (55.0 F) | 1.1 C (2.0 F) | 26 years | 16 of 100 (Routine) |
| 2 November 2012 | San Juan de Aragon, MX | daily low max (Tie) | 20.0 C (68.0 F) | tie | 46 years | 4 of 100 (Routine) |
| 26 October 2012 | San Juan de Aragon, MX | daily high max (Tie) | 28.9 C (84.0 F) | tie | 25 years | 3 of 100 (Routine) |
| 25 October 2012 | San Juan de Aragon, MX | daily high max (Tie) | 28.9 C (84.0 F) | tie | 4 years | 1 of 100 (Routine) |
| 23 October 2012 | San Juan de Aragon, MX | daily high max | 28.9 C (84.0 F) | 1.1 C (2.0 F) | 18 years | 14 of 100 (Routine) |
| 30 September 2012 | San Juan de Aragon, MX | daily high min | 14.4 C (57.9 F) | 0.5 C (0.9 F) | 34 years | 18 of 100 (Routine) |
| 28 September 2012 | San Juan de Aragon, MX | daily high min (Tie) | 15.0 C (59.0 F) | tie | 14 years | 2 of 100 (Routine) |
| 27 September 2012 | San Juan de Aragon, MX | daily rain | 40.9 mm (1.6 in) | 25.9 mm (1.0 in) | 45 years | 49 of 100 (Notable) |
| 17 September 2012 | San Juan de Aragon, MX | daily high min (Tie) | 13.9 C (57.0 F) | tie | 15 years | 2 of 100 (Routine) |
| 15 September 2012 | San Juan de Aragon, MX | daily rain | 19.3 mm (0.8 in) | 5.3 mm (0.21 in) | 37 years | 20 of 100 (Routine) |
| 3 September 2012 | San Juan de Aragon, MX | daily high max (Tie) | 28.3 C (82.9 F) | tie | 27 years | 3 of 100 (Routine) |
| 31 August 2012 | San Juan de Aragon, MX | daily high max (Tie) | 27.8 C (82.0 F) | tie | 34 years | 4 of 100 (Routine) |
| 28 August 2012 | San Juan de Aragon, MX | monthly high min (Tie) | 15.0 C (59.0 F) | tie | 32 years | 6 of 100 (Routine) |
| 27 August 2012 | San Juan de Aragon, MX | daily high min (Tie) | 13.9 C (57.0 F) | tie | 31 years | 3 of 100 (Routine) |
| 24 August 2012 | San Juan de Aragon, MX | daily high min (Tie) | 13.9 C (57.0 F) | tie | 6 years | 1 of 100 (Routine) |
Climate Trend
44 complete years, 1954 to 2012| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1954 | 15.2 C | -1.23 C |
| 1955 | 15.1 C | -1.28 C |
| 1956 | 14.9 C | -1.54 C |
| 1957 | 15.7 C | -0.72 C |
| 1959 | 15.4 C | -1.05 C |
| 1960 | 15.3 C | -1.16 C |
| 1961 | 15.1 C | -1.30 C |
| 1962 | 15.3 C | -1.17 C |
| 1963 | 15.3 C | -1.10 C |
| 1964 | 16.0 C | -0.45 C |
| 1965 | 15.6 C | -0.83 C |
| 1966 | 15.5 C | -0.94 C |
| 1967 | 15.4 C | -0.99 C |
| 1968 | 15.4 C | -0.98 C |
| 1970 | 15.8 C | -0.66 C |
| 1971 | 15.8 C | -0.67 C |
| 1972 | 16.1 C | -0.32 C |
| 1973 | 16.2 C | -0.22 C |
| 1974 | 15.5 C | -0.90 C |
| 1976 | 15.9 C | -0.51 C |
| 1977 | 16.8 C | +0.40 C |
| 1978 | 17.2 C | +0.80 C |
| 1979 | 17.1 C | +0.69 C |
| 1980 | 17.3 C | +0.87 C |
| 1981 | 17.1 C | +0.68 C |
| 1982 | 17.5 C | +1.04 C |
| 1983 | 17.1 C | +0.72 C |
| 1984 | 16.9 C | +0.52 C |
| 1985 | 17.0 C | +0.59 C |
| 1986 | 17.1 C | +0.69 C |
| 1987 | 17.4 C | +1.00 C |
| 1988 | 17.2 C | +0.74 C |
| 1996 | 17.1 C | +0.65 C |
| 1997 | 17.0 C | +0.60 C |
| 1999 | 16.6 C | +0.18 C |
| 2001 | 16.8 C | +0.41 C |
| 2002 | 17.3 C | +0.86 C |
| 2003 | 17.5 C | +1.11 C |
| 2004 | 17.1 C | +0.70 C |
| 2005 | 17.6 C | +1.20 C |
| 2006 | 17.1 C | +0.72 C |
| 2007 | 17.3 C | +0.88 C |
| 2008 | 17.4 C | +1.00 C |
| 2012 | 17.4 C | +1.02 C |
The annual mean temperature here has risen by 0.4 C (0.4 to 0.5) per decade over 1954 to 2012. In Fahrenheit: 0.8 F (0.7 to 0.9) per decade. The slope is a straight line fitted to 44 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.4 C (0.4 to 0.5) per decade | 0.8 F (0.7 to 0.9) per decade | 1954 to 2012 | 44 | Rise |
| Mean daily maximum | 0.3 C (0.2 to 0.4) per decade | 0.5 F (0.3 to 0.8) per decade | 1954 to 2012 | 44 | Rise |
| Mean daily minimum | 0.6 C (0.5 to 0.7) per decade | 1.1 F (0.9 to 1.2) per decade | 1954 to 2012 | 44 | 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
1953 to 2012| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 38.3 C (100.9 F) | 1986 | 32.8 C (91.0 F) | 57 |
| Coldest night (TNn) | -8.9 C (16.0 F) | 1956 | -2.8 C (27.0 F) | 57 |
| Wettest day (Rx1day) | 71.9 mm (2.8 in) | 2002 | 38.9 mm (1.5 in) | 57 |
| Wettest five days (Rx5day) | 161.6 mm (6.4 in) | 2002 | 68.9 mm (2.7 in) | 57 |
| Longest dry spell (CDD) | 113 days | 1986 | 56 days | 57 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1953 | 27.8 C (82.0 F) |
| 1954 | 31.7 C (89.1 F) |
| 1955 | 31.7 C (89.1 F) |
| 1956 | 32.2 C (90.0 F) |
| 1957 | 32.8 C (91.0 F) |
| 1958 | 31.7 C (89.1 F) |
| 1959 | 28.9 C (84.0 F) |
| 1960 | 33.3 C (91.9 F) |
| 1961 | 30.6 C (87.1 F) |
| 1962 | 30.6 C (87.1 F) |
| 1963 | 30.0 C (86.0 F) |
| 1964 | 31.1 C (88.0 F) |
| 1965 | 30.0 C (86.0 F) |
| 1966 | 31.1 C (88.0 F) |
| 1967 | 31.7 C (89.1 F) |
| 1968 | 30.0 C (86.0 F) |
| 1969 | 31.7 C (89.1 F) |
| 1970 | 32.8 C (91.0 F) |
| 1971 | 32.2 C (90.0 F) |
| 1972 | 31.1 C (88.0 F) |
| 1973 | 32.8 C (91.0 F) |
| 1974 | 31.7 C (89.1 F) |
| 1975 | 30.6 C (87.1 F) |
| 1976 | 30.6 C (87.1 F) |
| 1977 | 33.9 C (93.0 F) |
| 1978 | 33.9 C (93.0 F) |
| 1979 | 32.2 C (90.0 F) |
| 1980 | 33.3 C (91.9 F) |
| 1981 | 35.6 C (96.1 F) |
| 1982 | 33.9 C (93.0 F) |
| 1983 | 35.6 C (96.1 F) |
| 1984 | 33.9 C (93.0 F) |
| 1985 | 33.3 C (91.9 F) |
| 1986 | 38.3 C (100.9 F) |
| 1987 | 33.9 C (93.0 F) |
| 1988 | 33.3 C (91.9 F) |
| 1991 | 34.4 C (93.9 F) |
| 1992 | 31.7 C (89.1 F) |
| 1993 | 34.4 C (93.9 F) |
| 1994 | 33.3 C (91.9 F) |
| 1995 | 33.9 C (93.0 F) |
| 1996 | 32.2 C (90.0 F) |
| 1997 | 32.8 C (91.0 F) |
| 1998 | 35.6 C (96.1 F) |
| 1999 | 35.0 C (95.0 F) |
| 2000 | 35.0 C (95.0 F) |
| 2001 | 34.4 C (93.9 F) |
| 2002 | 33.9 C (93.0 F) |
| 2003 | 33.9 C (93.0 F) |
| 2004 | 31.7 C (89.1 F) |
| 2005 | 33.3 C (91.9 F) |
| 2006 | 32.8 C (91.0 F) |
| 2007 | 32.2 C (90.0 F) |
| 2008 | 33.3 C (91.9 F) |
| 2010 | 26.7 C (80.1 F) |
| 2011 | 32.8 C (91.0 F) |
| 2012 | 32.2 C (90.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1953 | -5.0 C (23.0 F) |
| 1954 | -5.6 C (21.9 F) |
| 1955 | -5.0 C (23.0 F) |
| 1956 | -8.9 C (16.0 F) |
| 1957 | -5.0 C (23.0 F) |
| 1958 | -3.3 C (26.1 F) |
| 1959 | -4.4 C (24.1 F) |
| 1960 | -6.7 C (19.9 F) |
| 1961 | -6.1 C (21.0 F) |
| 1962 | -4.4 C (24.1 F) |
| 1963 | -5.6 C (21.9 F) |
| 1964 | -4.4 C (24.1 F) |
| 1965 | -5.0 C (23.0 F) |
| 1966 | -4.4 C (24.1 F) |
| 1967 | -4.4 C (24.1 F) |
| 1968 | -2.8 C (27.0 F) |
| 1969 | -2.8 C (27.0 F) |
| 1970 | -3.3 C (26.1 F) |
| 1971 | -1.7 C (28.9 F) |
| 1972 | -3.9 C (25.0 F) |
| 1973 | -5.0 C (23.0 F) |
| 1974 | -5.0 C (23.0 F) |
| 1975 | -4.4 C (24.1 F) |
| 1976 | -5.6 C (21.9 F) |
| 1977 | -1.7 C (28.9 F) |
| 1978 | 0.0 C (32.0 F) |
| 1979 | 0.0 C (32.0 F) |
| 1980 | -2.8 C (27.0 F) |
| 1981 | -2.2 C (28.0 F) |
| 1982 | -1.7 C (28.9 F) |
| 1983 | -1.1 C (30.0 F) |
| 1984 | -0.6 C (30.9 F) |
| 1985 | -1.1 C (30.0 F) |
| 1986 | -5.0 C (23.0 F) |
| 1987 | -2.8 C (27.0 F) |
| 1988 | -2.8 C (27.0 F) |
| 1991 | 1.7 C (35.1 F) |
| 1992 | 0.0 C (32.0 F) |
| 1993 | 0.6 C (33.1 F) |
| 1994 | 3.9 C (39.0 F) |
| 1995 | 0.0 C (32.0 F) |
| 1996 | -2.2 C (28.0 F) |
| 1997 | -2.2 C (28.0 F) |
| 1998 | -1.7 C (28.9 F) |
| 1999 | -2.8 C (27.0 F) |
| 2000 | 0.6 C (33.1 F) |
| 2001 | 1.1 C (34.0 F) |
| 2002 | -5.0 C (23.0 F) |
| 2003 | -1.1 C (30.0 F) |
| 2004 | -1.1 C (30.0 F) |
| 2005 | 0.0 C (32.0 F) |
| 2006 | -5.0 C (23.0 F) |
| 2007 | 0.0 C (32.0 F) |
| 2008 | -1.1 C (30.0 F) |
| 2010 | -1.1 C (30.0 F) |
| 2011 | -0.6 C (30.9 F) |
| 2012 | 2.8 C (37.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1953 | 40.1 mm (1.6 in) |
| 1954 | 37.3 mm (1.5 in) |
| 1955 | 38.9 mm (1.5 in) |
| 1956 | 45.0 mm (1.8 in) |
| 1957 | 22.9 mm (0.9 in) |
| 1958 | 30.5 mm (1.2 in) |
| 1959 | 53.8 mm (2.1 in) |
| 1960 | 40.9 mm (1.6 in) |
| 1961 | 34.8 mm (1.4 in) |
| 1962 | 38.4 mm (1.5 in) |
| 1963 | 58.4 mm (2.3 in) |
| 1964 | 39.4 mm (1.6 in) |
| 1965 | 53.1 mm (2.1 in) |
| 1966 | 21.3 mm (0.8 in) |
| 1967 | 41.4 mm (1.6 in) |
| 1968 | 44.5 mm (1.8 in) |
| 1969 | 55.9 mm (2.2 in) |
| 1970 | 39.9 mm (1.6 in) |
| 1971 | 39.9 mm (1.6 in) |
| 1972 | 30.0 mm (1.2 in) |
| 1973 | 36.8 mm (1.4 in) |
| 1974 | 30.5 mm (1.2 in) |
| 1975 | 26.9 mm (1.1 in) |
| 1976 | 36.8 mm (1.4 in) |
| 1977 | 27.4 mm (1.1 in) |
| 1978 | 34.3 mm (1.4 in) |
| 1979 | 31.5 mm (1.2 in) |
| 1980 | 59.9 mm (2.4 in) |
| 1981 | 27.2 mm (1.1 in) |
| 1982 | 58.9 mm (2.3 in) |
| 1983 | 33.3 mm (1.3 in) |
| 1984 | 62.2 mm (2.4 in) |
| 1985 | 49.3 mm (1.9 in) |
| 1986 | 40.4 mm (1.6 in) |
| 1987 | 47.0 mm (1.9 in) |
| 1988 | 35.8 mm (1.4 in) |
| 1991 | 45.0 mm (1.8 in) |
| 1992 | 10.2 mm (0.4 in) |
| 1993 | 38.4 mm (1.5 in) |
| 1994 | 37.8 mm (1.5 in) |
| 1995 | 47.8 mm (1.9 in) |
| 1996 | 33.0 mm (1.3 in) |
| 1997 | 33.5 mm (1.3 in) |
| 1998 | 23.9 mm (0.9 in) |
| 1999 | 37.8 mm (1.5 in) |
| 2000 | 48.8 mm (1.9 in) |
| 2001 | 31.8 mm (1.3 in) |
| 2002 | 71.9 mm (2.8 in) |
| 2003 | 39.6 mm (1.6 in) |
| 2004 | 32.5 mm (1.3 in) |
| 2005 | 45.0 mm (1.8 in) |
| 2006 | 35.3 mm (1.4 in) |
| 2007 | 63.0 mm (2.5 in) |
| 2008 | 48.0 mm (1.9 in) |
| 2010 | 0.0 mm (0.00 in) |
| 2011 | 59.9 mm (2.4 in) |
| 2012 | 40.9 mm (1.6 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1953 | 58.9 mm (2.3 in) |
| 1954 | 68.9 mm (2.7 in) |
| 1955 | 67.1 mm (2.6 in) |
| 1956 | 58.5 mm (2.3 in) |
| 1957 | 41.4 mm (1.6 in) |
| 1958 | 67.0 mm (2.6 in) |
| 1959 | 58.7 mm (2.3 in) |
| 1960 | 81.0 mm (3.2 in) |
| 1961 | 69.2 mm (2.7 in) |
| 1962 | 63.6 mm (2.5 in) |
| 1963 | 65.9 mm (2.6 in) |
| 1964 | 58.2 mm (2.3 in) |
| 1965 | 78.6 mm (3.1 in) |
| 1966 | 42.2 mm (1.7 in) |
| 1967 | 75.5 mm (3.0 in) |
| 1968 | 99.8 mm (3.9 in) |
| 1969 | 112.7 mm (4.4 in) |
| 1970 | 61.1 mm (2.4 in) |
| 1971 | 82.6 mm (3.3 in) |
| 1972 | 55.7 mm (2.2 in) |
| 1973 | 85.1 mm (3.4 in) |
| 1974 | 90.4 mm (3.6 in) |
| 1975 | 60.9 mm (2.4 in) |
| 1976 | 73.2 mm (2.9 in) |
| 1977 | 59.2 mm (2.3 in) |
| 1978 | 59.7 mm (2.4 in) |
| 1979 | 70.9 mm (2.8 in) |
| 1980 | 68.4 mm (2.7 in) |
| 1981 | 67.4 mm (2.7 in) |
| 1982 | 59.9 mm (2.4 in) |
| 1983 | 72.4 mm (2.9 in) |
| 1984 | 126.8 mm (5.0 in) |
| 1985 | 60.2 mm (2.4 in) |
| 1986 | 89.1 mm (3.5 in) |
| 1987 | 88.9 mm (3.5 in) |
| 1988 | 64.5 mm (2.5 in) |
| 1991 | 74.5 mm (2.9 in) |
| 1992 | 28.0 mm (1.1 in) |
| 1993 | 104.6 mm (4.1 in) |
| 1994 | 76.9 mm (3.0 in) |
| 1995 | 79.1 mm (3.1 in) |
| 1996 | 53.4 mm (2.1 in) |
| 1997 | 58.2 mm (2.3 in) |
| 1998 | 58.7 mm (2.3 in) |
| 1999 | 116.9 mm (4.6 in) |
| 2000 | 119.7 mm (4.7 in) |
| 2001 | 60.8 mm (2.4 in) |
| 2002 | 161.6 mm (6.4 in) |
| 2003 | 61.4 mm (2.4 in) |
| 2004 | 69.4 mm (2.7 in) |
| 2005 | 61.0 mm (2.4 in) |
| 2006 | 80.8 mm (3.2 in) |
| 2007 | 105.9 mm (4.2 in) |
| 2008 | 136.5 mm (5.4 in) |
| 2010 | 0.0 mm (0.00 in) |
| 2011 | 127.5 mm (5.0 in) |
| 2012 | 94.6 mm (3.7 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1953 | 38 days |
| 1954 | 46 days |
| 1955 | 99 days |
| 1956 | 110 days |
| 1957 | 52 days |
| 1958 | 52 days |
| 1959 | 96 days |
| 1960 | 65 days |
| 1961 | 94 days |
| 1962 | 46 days |
| 1963 | 79 days |
| 1964 | 64 days |
| 1965 | 30 days |
| 1966 | 58 days |
| 1967 | 67 days |
| 1968 | 52 days |
| 1969 | 62 days |
| 1970 | 80 days |
| 1971 | 76 days |
| 1972 | 86 days |
| 1973 | 57 days |
| 1974 | 64 days |
| 1975 | 65 days |
| 1976 | 55 days |
| 1977 | 63 days |
| 1978 | 43 days |
| 1979 | 42 days |
| 1980 | 34 days |
| 1981 | 58 days |
| 1982 | 55 days |
| 1983 | 56 days |
| 1984 | 83 days |
| 1985 | 73 days |
| 1986 | 113 days |
| 1987 | 63 days |
| 1988 | 43 days |
| 1991 | 61 days |
| 1992 | 36 days |
| 1993 | 43 days |
| 1994 | 49 days |
| 1995 | 31 days |
| 1996 | 54 days |
| 1997 | 69 days |
| 1998 | 71 days |
| 1999 | 60 days |
| 2000 | 59 days |
| 2001 | 46 days |
| 2002 | 45 days |
| 2003 | 50 days |
| 2004 | 43 days |
| 2005 | 42 days |
| 2006 | 82 days |
| 2007 | 31 days |
| 2008 | 41 days |
| 2010 | 31 days |
| 2011 | 38 days |
| 2012 | 56 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
26 years with a frostAcross 26 years with a frost, the median last spring frost at San Juan de Aragon falls on 23 February and the median first autumn frost on 27 November, which leaves a median of 271 days between them.
Fitted over all years, the growing season changes by +19.8 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1954 to 2006) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 23 February | n/a | 23 February | n/a | -13.7 days per decade |
| First autumn frost | 27 November | n/a | 27 November | n/a | +6.1 days per decade |
| Growing days | 271 days | n/a | 271 days | n/a | +19.8 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
54 years, 1954 to 2012A day with at least 39.4 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 75.4 mm (3.0 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 39.4 mm (1.6 in) | |
| 5 years | 49.7 mm (2.0 in) | |
| 10 years | 56.3 mm (2.2 in) | |
| 25 years | 64.2 mm (2.5 in) | |
| 50 years | 69.9 mm (2.8 in) | |
| 100 years | 75.4 mm (3.0 in) | Longer than the 54 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, 54 years of values from 1954 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: 71.9 mm (2.8 in) in 2002; 63.0 mm (2.5 in) in 2007; 62.2 mm (2.4 in) in 1984.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of San Juan de Aragon, at 1996. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1996 ran 0.5 C (1.0 F) lower than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1996 | -0.5 | -1.0 | likely | 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).