Presa San Ildefonso Weather Records (MXN00015190)
Record envelope, standing records and threshold days for Presa San Ildefonso (MXN00015190), Mexico, with 61 years of record.
Key Facts for Presa San Ildefonso
- Presa San Ildefonso (MXN00015190) is a weather station in Mexico at 20.18 latitude and -99.95 longitude, 2,290 m (7,513 ft) above sea level.
- The station reports from 1951 to 2011, 61 years of record.
- 1,464 records set at Presa San Ildefonso still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Presa San Ildefonso set a daily record low minimum temperature of 7.2 C (45.0 F) on 14 September 2011.
About the Station
- Location: Mexico, 20.18 latitude, -99.95 longitude.
- Elevation: 2,290 m (7,513 ft).
- Period of record: 1951 to 2011, 61 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 | 31.1 C (88.0 F) | -7.2 C (19.0 F) | n/a | n/a |
| Feb | 30.0 C (86.0 F) | -6.1 C (21.0 F) | n/a | n/a |
| Mar | 33.3 C (91.9 F) | -4.4 C (24.1 F) | n/a | n/a |
| Apr | 33.9 C (93.0 F) | 0.0 C (32.0 F) | n/a | n/a |
| May | 35.0 C (95.0 F) | 2.8 C (37.0 F) | n/a | n/a |
| Jun | 33.3 C (91.9 F) | 3.9 C (39.0 F) | n/a | n/a |
| Jul | 28.3 C (82.9 F) | 5.0 C (41.0 F) | n/a | n/a |
| Aug | 29.4 C (84.9 F) | 5.6 C (42.1 F) | n/a | n/a |
| Sep | 28.9 C (84.0 F) | -0.6 C (30.9 F) | n/a | n/a |
| Oct | 27.8 C (82.0 F) | -2.8 C (27.0 F) | n/a | n/a |
| Nov | 27.8 C (82.0 F) | -3.9 C (25.0 F) | n/a | n/a |
| Dec | 27.8 C (82.0 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 | 31 |
| 1952 | 46 |
| 1953 | 38 |
| 1954 | 28 |
| 1955 | 74 |
| 1956 | 29 |
| 1957 | 26 |
| 1958 | 47 |
| 1959 | 41 |
| 1960 | 27 |
| 1961 | 17 |
| 1962 | 32 |
| 1963 | 19 |
| 1964 | 33 |
| 1965 | 24 |
| 1966 | 26 |
| 1967 | 15 |
| 1968 | 14 |
| 1969 | 29 |
| 1970 | 19 |
| 1971 | 18 |
| 1972 | 23 |
| 1973 | 19 |
| 1974 | 26 |
| 1975 | 16 |
| 1976 | 31 |
| 1977 | 19 |
| 1978 | 18 |
| 1979 | 34 |
| 1980 | 23 |
| 1981 | 12 |
| 1982 | 21 |
| 1983 | 20 |
| 1984 | 18 |
| 1985 | 12 |
| 1986 | 18 |
| 1987 | 39 |
| 1988 | 28 |
| 1989 | 27 |
| 1990 | 15 |
| 1991 | 24 |
| 1992 | 20 |
| 1993 | 7 |
| 1994 | 17 |
| 1995 | 25 |
| 1996 | 10 |
| 1997 | 33 |
| 1998 | 72 |
| 1999 | 24 |
| 2000 | 18 |
| 2001 | 15 |
| 2002 | 13 |
| 2003 | 18 |
| 2004 | 19 |
| 2005 | 25 |
| 2006 | 17 |
| 2007 | 13 |
| 2008 | 18 |
| 2011 | 24 |
All-Time Record Progression
6 new records| Date | Kind | Detail |
|---|---|---|
| 1983-07-02 | Record daily precipitation | Record daily precipitation 100.8 mm (4.0 in) |
| 1992-01-16 | Record low maximum temperature | Record low maximum temperature 6.7 C (44.1 F) |
| 1998-03-31 | Record high maximum temperature | Record high maximum temperature 33.3 C (91.9 F) |
| 1998-04-16 | Record high maximum temperature | Record high maximum temperature 33.9 C (93.0 F) |
| 1998-05-07 | Record high maximum temperature | Record high maximum temperature 35.0 C (95.0 F) |
| 2006-01-07 | Record low minimum temperature | Record low minimum temperature -7.2 C (19.0 F) |
Wettest Day of Each Month
Jul: 100.8 mm (4.0 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 32.3 mm (1.3 in) | 18 January 1958 |
| Feb | 57.9 mm (2.3 in) | 1 February 1975 |
| Mar | 65.8 mm (2.6 in) | 9 March 1966 |
| Apr | 47.8 mm (1.9 in) | 21 April 1956 |
| May | 69.1 mm (2.7 in) | 20 May 2000 |
| Jun | 70.9 mm (2.8 in) | 17 June 1963 |
| Jul | 100.8 mm (4.0 in) | 2 July 1983 |
| Aug | 86.9 mm (3.4 in) | 26 August 2005 |
| Sep | 68.8 mm (2.7 in) | 13 September 1951 |
| Oct | 93.5 mm (3.7 in) | 13 October 1971 |
| Nov | 62.0 mm (2.4 in) | 1 November 1953 |
| Dec | 32.0 mm (1.3 in) | 13 December 1991 |
Period of Record Coverage
1951 to 2011| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1951 | 332 | 91% | Yes |
| 1952 | 364 | 99% | Yes |
| 1953 | 361 | 99% | Yes |
| 1954 | 360 | 99% | Yes |
| 1955 | 364 | 100% | Yes |
| 1956 | 366 | 100% | Yes |
| 1957 | 365 | 100% | Yes |
| 1958 | 363 | 99% | Yes |
| 1959 | 362 | 99% | Yes |
| 1960 | 363 | 99% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 364 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 364 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 364 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 364 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 364 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 363 | 99% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 343 | 94% | Yes |
| 1984 | 363 | 99% | Yes |
| 1985 | 334 | 92% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 363 | 99% | Yes |
| 1988 | 351 | 96% | Yes |
| 1989 | 327 | 90% | No |
| 1990 | 365 | 100% | Yes |
| 1991 | 362 | 99% | Yes |
| 1992 | 346 | 95% | Yes |
| 1993 | 198 | 54% | No |
| 1994 | 350 | 96% | Yes |
| 1995 | 363 | 99% | Yes |
| 1996 | 357 | 98% | Yes |
| 1997 | 358 | 98% | Yes |
| 1998 | 357 | 98% | Yes |
| 1999 | 342 | 94% | Yes |
| 2000 | 351 | 96% | Yes |
| 2001 | 364 | 100% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 363 | 99% | Yes |
| 2004 | 362 | 99% | Yes |
| 2005 | 333 | 91% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 356 | 97% | Yes |
| 2011 | 183 | 50% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 14 September 2011 | Presa San Ildefonso, MX | daily low min | 7.2 C (45.0 F) | 0.6 C (1.1 F) | 24 years | 16 of 100 (Routine) |
| 11 September 2011 | Presa San Ildefonso, MX | daily low min | 2.8 C (37.0 F) | 2.2 C (4.0 F) | 22 years | 23 of 100 (Routine) |
| 26 August 2011 | Presa San Ildefonso, MX | daily high max (Tie) | 25.0 C (77.0 F) | tie | 28 years | 3 of 100 (Routine) |
| 25 August 2011 | Presa San Ildefonso, MX | daily high max (Tie) | 25.0 C (77.0 F) | tie | 20 years | 3 of 100 (Routine) |
| 24 August 2011 | Presa San Ildefonso, MX | daily rain | 57.9 mm (2.3 in) | 22.8 mm (0.9 in) | 34 years | 34 of 100 (Routine) |
| 21 August 2011 | Presa San Ildefonso, MX | daily high max (Tie) | 25.0 C (77.0 F) | tie | 50 years | 5 of 100 (Routine) |
| 10 August 2011 | Presa San Ildefonso, MX | daily high max (Tie) | 25.6 C (78.1 F) | tie | 24 years | 3 of 100 (Routine) |
| 6 August 2011 | Presa San Ildefonso, MX | daily high max (Tie) | 25.6 C (78.1 F) | tie | 44 years | 4 of 100 (Routine) |
| 21 July 2011 | Presa San Ildefonso, MX | daily rain | 30.0 mm (1.2 in) | 8.2 mm (0.32 in) | 40 years | 24 of 100 (Routine) |
| 20 July 2011 | Presa San Ildefonso, MX | daily high max (Tie) | 25.6 C (78.1 F) | tie | 12 years | 2 of 100 (Routine) |
| 23 June 2011 | Presa San Ildefonso, MX | daily high min | 14.4 C (57.9 F) | 0.5 C (0.9 F) | 52 years | 23 of 100 (Routine) |
| 22 June 2011 | Presa San Ildefonso, MX | daily high min (Tie) | 13.9 C (57.0 F) | tie | 53 years | 5 of 100 (Routine) |
| 21 June 2011 | Presa San Ildefonso, MX | daily high max | 29.4 C (84.9 F) | 1.1 C (2.0 F) | 12 years | 12 of 100 (Routine) |
| 20 June 2011 | Presa San Ildefonso, MX | daily high max (Tie) | 30.0 C (86.0 F) | tie | 28 years | 3 of 100 (Routine) |
| 13 June 2011 | Presa San Ildefonso, MX | daily low min (Tie) | 6.1 C (43.0 F) | tie | 4 years | 1 of 100 (Routine) |
| 7 June 2011 | Presa San Ildefonso, MX | daily low min (Tie) | 6.7 C (44.1 F) | tie | 46 years | 5 of 100 (Routine) |
| 6 June 2011 | Presa San Ildefonso, MX | daily low min | 6.1 C (43.0 F) | 0.6 C (1.1 F) | 44 years | 22 of 100 (Routine) |
| 5 June 2011 | Presa San Ildefonso, MX | daily low min | 5.0 C (41.0 F) | 0.6 C (1.1 F) | 54 years | 25 of 100 (Routine) |
| 4 June 2011 | Presa San Ildefonso, MX | daily low min | 5.0 C (41.0 F) | 1.7 C (3.1 F) | 54 years | 31 of 100 (Routine) |
| 3 June 2011 | Presa San Ildefonso, MX | daily low min | 5.0 C (41.0 F) | 0.6 C (1.1 F) | 44 years | 22 of 100 (Routine) |
Climate Trend
51 complete years, 1952 to 2008| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1952 | 15.3 C | -0.35 C |
| 1953 | 15.5 C | -0.17 C |
| 1954 | 14.9 C | -0.71 C |
| 1955 | 13.9 C | -1.76 C |
| 1956 | 15.1 C | -0.52 C |
| 1957 | 16.2 C | +0.57 C |
| 1958 | 15.7 C | +0.03 C |
| 1959 | 15.5 C | -0.17 C |
| 1960 | 16.0 C | +0.41 C |
| 1961 | 15.7 C | +0.04 C |
| 1962 | 15.9 C | +0.22 C |
| 1963 | 15.6 C | -0.04 C |
| 1964 | 16.0 C | +0.32 C |
| 1965 | 15.6 C | +0.00 C |
| 1966 | 15.0 C | -0.59 C |
| 1967 | 15.2 C | -0.42 C |
| 1968 | 15.1 C | -0.55 C |
| 1969 | 16.2 C | +0.57 C |
| 1970 | 15.7 C | +0.10 C |
| 1971 | 15.5 C | -0.16 C |
| 1972 | 16.0 C | +0.36 C |
| 1973 | 15.9 C | +0.30 C |
| 1974 | 15.3 C | -0.30 C |
| 1975 | 15.3 C | -0.29 C |
| 1976 | 15.1 C | -0.57 C |
| 1977 | 15.5 C | -0.17 C |
| 1978 | 15.5 C | -0.11 C |
| 1979 | 15.4 C | -0.22 C |
| 1980 | 16.0 C | +0.39 C |
| 1981 | 15.6 C | -0.03 C |
| 1982 | 16.4 C | +0.73 C |
| 1984 | 15.8 C | +0.19 C |
| 1986 | 15.6 C | -0.08 C |
| 1987 | 15.8 C | +0.18 C |
| 1988 | 16.0 C | +0.32 C |
| 1990 | 15.8 C | +0.12 C |
| 1991 | 16.2 C | +0.52 C |
| 1994 | 16.1 C | +0.48 C |
| 1995 | 16.5 C | +0.83 C |
| 1996 | 15.8 C | +0.12 C |
| 1997 | 15.9 C | +0.25 C |
| 1998 | 16.6 C | +1.00 C |
| 1999 | 15.3 C | -0.30 C |
| 2000 | 15.5 C | -0.09 C |
| 2001 | 15.4 C | -0.25 C |
| 2002 | 15.6 C | -0.01 C |
| 2003 | 16.0 C | +0.32 C |
| 2004 | 15.3 C | -0.29 C |
| 2006 | 15.4 C | -0.20 C |
| 2007 | 15.6 C | -0.06 C |
| 2008 | 15.5 C | -0.15 C |
The annual mean temperature here has risen by 0.08 C (0.00 to 0.15) per decade over 1952 to 2008. In Fahrenheit: 0.14 F (0.01 to 0.27) per decade. The slope is a straight line fitted to 51 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.08 C (0.00 to 0.15) per decade | 0.14 F (0.01 to 0.27) per decade | 1952 to 2008 | 51 | Rise |
| Mean daily maximum | 0.4 C (0.3 to 0.5) per decade | 0.7 F (0.5 to 0.9) per decade | 1952 to 2008 | 51 | Rise |
| Mean daily minimum | -0.2 C (-0.3 to -0.1) per decade | -0.4 F (-0.5 to -0.3) per decade | 1952 to 2008 | 51 | 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
1951 to 2011| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 35.0 C (95.0 F) | 1998 | 31.1 C (88.0 F) | 59 |
| Coldest night (TNn) | -7.2 C (19.0 F) | 2006 | -3.3 C (26.1 F) | 59 |
| Wettest day (Rx1day) | 100.8 mm (4.0 in) | 1983 | 54.6 mm (2.1 in) | 59 |
| Wettest five days (Rx5day) | 200.1 mm (7.9 in) | 1983 | 104.9 mm (4.1 in) | 59 |
| Longest dry spell (CDD) | 120 days | 1970 | 60 days | 59 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1951 | 28.9 C (84.0 F) |
| 1952 | 31.1 C (88.0 F) |
| 1953 | 31.1 C (88.0 F) |
| 1954 | 31.7 C (89.1 F) |
| 1955 | 29.4 C (84.9 F) |
| 1956 | 30.0 C (86.0 F) |
| 1957 | 30.0 C (86.0 F) |
| 1958 | 30.0 C (86.0 F) |
| 1959 | 28.9 C (84.0 F) |
| 1960 | 31.1 C (88.0 F) |
| 1961 | 32.2 C (90.0 F) |
| 1962 | 31.1 C (88.0 F) |
| 1963 | 30.0 C (86.0 F) |
| 1964 | 32.2 C (90.0 F) |
| 1965 | 30.0 C (86.0 F) |
| 1966 | 30.6 C (87.1 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 | 32.8 C (91.0 F) |
| 1972 | 31.1 C (88.0 F) |
| 1973 | 31.7 C (89.1 F) |
| 1974 | 30.6 C (87.1 F) |
| 1975 | 31.1 C (88.0 F) |
| 1976 | 28.9 C (84.0 F) |
| 1977 | 30.0 C (86.0 F) |
| 1978 | 32.2 C (90.0 F) |
| 1979 | 30.0 C (86.0 F) |
| 1980 | 30.0 C (86.0 F) |
| 1981 | 30.0 C (86.0 F) |
| 1982 | 31.1 C (88.0 F) |
| 1983 | 31.7 C (89.1 F) |
| 1984 | 30.6 C (87.1 F) |
| 1985 | 30.0 C (86.0 F) |
| 1986 | 30.6 C (87.1 F) |
| 1987 | 30.0 C (86.0 F) |
| 1988 | 31.7 C (89.1 F) |
| 1989 | 32.8 C (91.0 F) |
| 1990 | 32.2 C (90.0 F) |
| 1991 | 31.7 C (89.1 F) |
| 1992 | 29.4 C (84.9 F) |
| 1993 | 30.6 C (87.1 F) |
| 1994 | 30.6 C (87.1 F) |
| 1995 | 32.2 C (90.0 F) |
| 1996 | 31.1 C (88.0 F) |
| 1997 | 29.4 C (84.9 F) |
| 1998 | 35.0 C (95.0 F) |
| 1999 | 32.2 C (90.0 F) |
| 2000 | 31.1 C (88.0 F) |
| 2001 | 31.7 C (89.1 F) |
| 2002 | 32.2 C (90.0 F) |
| 2003 | 34.4 C (93.9 F) |
| 2004 | 30.0 C (86.0 F) |
| 2005 | 33.3 C (91.9 F) |
| 2006 | 31.7 C (89.1 F) |
| 2007 | 30.6 C (87.1 F) |
| 2008 | 32.2 C (90.0 F) |
| 2011 | 33.9 C (93.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1951 | -1.7 C (28.9 F) |
| 1952 | -1.7 C (28.9 F) |
| 1953 | -3.3 C (26.1 F) |
| 1954 | -3.3 C (26.1 F) |
| 1955 | -3.3 C (26.1 F) |
| 1956 | -6.7 C (19.9 F) |
| 1957 | -2.2 C (28.0 F) |
| 1958 | -1.1 C (30.0 F) |
| 1959 | -1.1 C (30.0 F) |
| 1960 | -4.4 C (24.1 F) |
| 1961 | -2.8 C (27.0 F) |
| 1962 | -3.3 C (26.1 F) |
| 1963 | -4.4 C (24.1 F) |
| 1964 | -1.1 C (30.0 F) |
| 1965 | -3.3 C (26.1 F) |
| 1966 | -4.4 C (24.1 F) |
| 1967 | -2.8 C (27.0 F) |
| 1968 | -3.3 C (26.1 F) |
| 1969 | -3.3 C (26.1 F) |
| 1970 | -2.8 C (27.0 F) |
| 1971 | -1.1 C (30.0 F) |
| 1972 | -3.9 C (25.0 F) |
| 1973 | -3.9 C (25.0 F) |
| 1974 | -2.2 C (28.0 F) |
| 1975 | -3.3 C (26.1 F) |
| 1976 | -6.1 C (21.0 F) |
| 1977 | -1.7 C (28.9 F) |
| 1978 | -1.1 C (30.0 F) |
| 1979 | -6.1 C (21.0 F) |
| 1980 | -2.2 C (28.0 F) |
| 1981 | -2.2 C (28.0 F) |
| 1982 | -2.2 C (28.0 F) |
| 1983 | -4.4 C (24.1 F) |
| 1984 | 0.6 C (33.1 F) |
| 1985 | -3.3 C (26.1 F) |
| 1986 | -6.1 C (21.0 F) |
| 1987 | -4.4 C (24.1 F) |
| 1988 | -4.4 C (24.1 F) |
| 1989 | -3.3 C (26.1 F) |
| 1990 | -2.8 C (27.0 F) |
| 1991 | 0.0 C (32.0 F) |
| 1992 | -0.6 C (30.9 F) |
| 1993 | -1.1 C (30.0 F) |
| 1994 | -2.2 C (28.0 F) |
| 1995 | -0.6 C (30.9 F) |
| 1996 | -3.9 C (25.0 F) |
| 1997 | -5.0 C (23.0 F) |
| 1998 | -3.3 C (26.1 F) |
| 1999 | -3.9 C (25.0 F) |
| 2000 | -4.4 C (24.1 F) |
| 2001 | -2.2 C (28.0 F) |
| 2002 | -3.3 C (26.1 F) |
| 2003 | -4.4 C (24.1 F) |
| 2004 | -2.2 C (28.0 F) |
| 2005 | -2.8 C (27.0 F) |
| 2006 | -7.2 C (19.0 F) |
| 2007 | -1.7 C (28.9 F) |
| 2008 | -4.4 C (24.1 F) |
| 2011 | 2.8 C (37.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1951 | 77.2 mm (3.0 in) |
| 1952 | 46.0 mm (1.8 in) |
| 1953 | 62.0 mm (2.4 in) |
| 1954 | 53.3 mm (2.1 in) |
| 1955 | 50.8 mm (2.0 in) |
| 1956 | 51.8 mm (2.0 in) |
| 1957 | 50.8 mm (2.0 in) |
| 1958 | 85.9 mm (3.4 in) |
| 1959 | 47.0 mm (1.9 in) |
| 1960 | 35.3 mm (1.4 in) |
| 1961 | 45.0 mm (1.8 in) |
| 1962 | 59.9 mm (2.4 in) |
| 1963 | 70.9 mm (2.8 in) |
| 1964 | 78.5 mm (3.1 in) |
| 1965 | 54.4 mm (2.1 in) |
| 1966 | 65.8 mm (2.6 in) |
| 1967 | 49.8 mm (2.0 in) |
| 1968 | 50.3 mm (2.0 in) |
| 1969 | 60.5 mm (2.4 in) |
| 1970 | 39.9 mm (1.6 in) |
| 1971 | 93.5 mm (3.7 in) |
| 1972 | 32.3 mm (1.3 in) |
| 1973 | 59.9 mm (2.4 in) |
| 1974 | 66.5 mm (2.6 in) |
| 1975 | 63.5 mm (2.5 in) |
| 1976 | 35.6 mm (1.4 in) |
| 1977 | 55.4 mm (2.2 in) |
| 1978 | 42.4 mm (1.7 in) |
| 1979 | 62.0 mm (2.4 in) |
| 1980 | 39.9 mm (1.6 in) |
| 1981 | 48.3 mm (1.9 in) |
| 1982 | 32.0 mm (1.3 in) |
| 1983 | 100.8 mm (4.0 in) |
| 1984 | 34.3 mm (1.4 in) |
| 1985 | 70.9 mm (2.8 in) |
| 1986 | 50.5 mm (2.0 in) |
| 1987 | 84.8 mm (3.3 in) |
| 1988 | 53.1 mm (2.1 in) |
| 1989 | 39.4 mm (1.6 in) |
| 1990 | 55.9 mm (2.2 in) |
| 1991 | 68.1 mm (2.7 in) |
| 1992 | 50.0 mm (2.0 in) |
| 1993 | 39.6 mm (1.6 in) |
| 1994 | 56.9 mm (2.2 in) |
| 1995 | 48.0 mm (1.9 in) |
| 1996 | 54.6 mm (2.1 in) |
| 1997 | 60.2 mm (2.4 in) |
| 1998 | 53.6 mm (2.1 in) |
| 1999 | 56.9 mm (2.2 in) |
| 2000 | 69.1 mm (2.7 in) |
| 2001 | 39.1 mm (1.5 in) |
| 2002 | 44.2 mm (1.7 in) |
| 2003 | 56.9 mm (2.2 in) |
| 2004 | 57.2 mm (2.3 in) |
| 2005 | 86.9 mm (3.4 in) |
| 2006 | 65.8 mm (2.6 in) |
| 2007 | 54.9 mm (2.2 in) |
| 2008 | 53.3 mm (2.1 in) |
| 2011 | 57.9 mm (2.3 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1951 | 108.4 mm (4.3 in) |
| 1952 | 113.3 mm (4.5 in) |
| 1953 | 109.4 mm (4.3 in) |
| 1954 | 95.5 mm (3.8 in) |
| 1955 | 103.7 mm (4.1 in) |
| 1956 | 117.3 mm (4.6 in) |
| 1957 | 76.7 mm (3.0 in) |
| 1958 | 130.1 mm (5.1 in) |
| 1959 | 120.3 mm (4.7 in) |
| 1960 | 62.5 mm (2.5 in) |
| 1961 | 91.0 mm (3.6 in) |
| 1962 | 137.8 mm (5.4 in) |
| 1963 | 138.0 mm (5.4 in) |
| 1964 | 88.7 mm (3.5 in) |
| 1965 | 96.0 mm (3.8 in) |
| 1966 | 98.7 mm (3.9 in) |
| 1967 | 82.8 mm (3.3 in) |
| 1968 | 121.9 mm (4.8 in) |
| 1969 | 111.3 mm (4.4 in) |
| 1970 | 92.4 mm (3.6 in) |
| 1971 | 148.1 mm (5.8 in) |
| 1972 | 81.0 mm (3.2 in) |
| 1973 | 112.7 mm (4.4 in) |
| 1974 | 137.4 mm (5.4 in) |
| 1975 | 105.4 mm (4.1 in) |
| 1976 | 129.1 mm (5.1 in) |
| 1977 | 90.5 mm (3.6 in) |
| 1978 | 119.6 mm (4.7 in) |
| 1979 | 140.3 mm (5.5 in) |
| 1980 | 97.9 mm (3.9 in) |
| 1981 | 123.8 mm (4.9 in) |
| 1982 | 86.6 mm (3.4 in) |
| 1983 | 200.1 mm (7.9 in) |
| 1984 | 93.2 mm (3.7 in) |
| 1985 | 146.5 mm (5.8 in) |
| 1986 | 82.7 mm (3.3 in) |
| 1987 | 134.9 mm (5.3 in) |
| 1988 | 84.6 mm (3.3 in) |
| 1989 | 63.5 mm (2.5 in) |
| 1990 | 134.1 mm (5.3 in) |
| 1991 | 114.1 mm (4.5 in) |
| 1992 | 115.6 mm (4.6 in) |
| 1993 | 74.4 mm (2.9 in) |
| 1994 | 104.9 mm (4.1 in) |
| 1995 | 93.8 mm (3.7 in) |
| 1996 | 95.7 mm (3.8 in) |
| 1997 | 109.8 mm (4.3 in) |
| 1998 | 87.7 mm (3.5 in) |
| 1999 | 111.8 mm (4.4 in) |
| 2000 | 94.8 mm (3.7 in) |
| 2001 | 88.3 mm (3.5 in) |
| 2002 | 80.0 mm (3.1 in) |
| 2003 | 138.5 mm (5.5 in) |
| 2004 | 97.9 mm (3.9 in) |
| 2005 | 101.6 mm (4.0 in) |
| 2006 | 119.1 mm (4.7 in) |
| 2007 | 88.9 mm (3.5 in) |
| 2008 | 115.3 mm (4.5 in) |
| 2011 | 85.4 mm (3.4 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1951 | 73 days |
| 1952 | 61 days |
| 1953 | 72 days |
| 1954 | 51 days |
| 1955 | 118 days |
| 1956 | 88 days |
| 1957 | 90 days |
| 1958 | 55 days |
| 1959 | 53 days |
| 1960 | 98 days |
| 1961 | 54 days |
| 1962 | 101 days |
| 1963 | 87 days |
| 1964 | 49 days |
| 1965 | 45 days |
| 1966 | 35 days |
| 1967 | 43 days |
| 1968 | 30 days |
| 1969 | 62 days |
| 1970 | 120 days |
| 1971 | 73 days |
| 1972 | 41 days |
| 1973 | 86 days |
| 1974 | 30 days |
| 1975 | 88 days |
| 1976 | 70 days |
| 1977 | 48 days |
| 1978 | 41 days |
| 1979 | 39 days |
| 1980 | 70 days |
| 1981 | 34 days |
| 1982 | 62 days |
| 1983 | 89 days |
| 1984 | 92 days |
| 1985 | 56 days |
| 1986 | 67 days |
| 1987 | 76 days |
| 1988 | 60 days |
| 1989 | 34 days |
| 1990 | 34 days |
| 1991 | 83 days |
| 1992 | 46 days |
| 1993 | 54 days |
| 1994 | 52 days |
| 1995 | 69 days |
| 1996 | 68 days |
| 1997 | 48 days |
| 1998 | 114 days |
| 1999 | 77 days |
| 2000 | 53 days |
| 2001 | 49 days |
| 2002 | 52 days |
| 2003 | 75 days |
| 2004 | 54 days |
| 2005 | 30 days |
| 2006 | 57 days |
| 2007 | 34 days |
| 2008 | 61 days |
| 2011 | 66 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
36 years with a frostAcross 36 years with a frost, the median last spring frost at Presa San Ildefonso falls on 20 February and the median first autumn frost on 16 November, which leaves a median of 267 days between them.
Fitted over all years, the growing season changes by -5.2 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1962 to 2008) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 20 February | n/a | 25 February | n/a | +2.6 days per decade |
| First autumn frost | 16 November | n/a | 17 November | n/a | -2.6 days per decade |
| Growing days | 267 days | n/a | 263 days | n/a | -5.2 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
58 years, 1951 to 2008A day with at least 54.2 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 102.5 mm (4.0 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 54.2 mm (2.1 in) | |
| 5 years | 67.9 mm (2.7 in) | |
| 10 years | 76.6 mm (3.0 in) | |
| 25 years | 87.3 mm (3.4 in) | |
| 50 years | 95.0 mm (3.7 in) | |
| 100 years | 102.5 mm (4.0 in) | Longer than the 58 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, 58 years of values from 1951 to 2008.
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: 100.8 mm (4.0 in) in 1983; 93.5 mm (3.7 in) in 1971; 86.9 mm (3.4 in) in 2005.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
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).