San Isidro Weather Records (MXN00026082)
Record envelope, standing records and threshold days for San Isidro (MXN00026082), Mexico, with 57 years of record.
Key Facts for San Isidro
- San Isidro (MXN00026082) is a weather station in Mexico at 28.82 latitude and -111.65 longitude, 30 m (98 ft) above sea level.
- The station reports from 1956 to 2012, 57 years of record.
- 1,464 records set at San Isidro still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- San Isidro tied a daily record high minimum temperature of 11.7 C (53.1 F) on 20 November 2012.
About the Station
- Location: Mexico, 28.82 latitude, -111.65 longitude.
- Elevation: 30 m (98 ft).
- Period of record: 1956 to 2012, 57 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 | 37.8 C (100.0 F) | -6.7 C (19.9 F) | n/a | n/a |
| Feb | 37.8 C (100.0 F) | -5.0 C (23.0 F) | n/a | n/a |
| Mar | 40.6 C (105.1 F) | -1.7 C (28.9 F) | n/a | n/a |
| Apr | 43.9 C (111.0 F) | 1.1 C (34.0 F) | n/a | n/a |
| May | 47.8 C (118.0 F) | 2.8 C (37.0 F) | n/a | n/a |
| Jun | 50.6 C (123.1 F) | 8.9 C (48.0 F) | n/a | n/a |
| Jul | 50.0 C (122.0 F) | 12.8 C (55.0 F) | n/a | n/a |
| Aug | 46.7 C (116.1 F) | 15.0 C (59.0 F) | n/a | n/a |
| Sep | 47.8 C (118.0 F) | 10.6 C (51.1 F) | n/a | n/a |
| Oct | 45.6 C (114.1 F) | 1.7 C (35.1 F) | n/a | n/a |
| Nov | 41.7 C (107.1 F) | -1.1 C (30.0 F) | n/a | n/a |
| Dec | 33.9 C (93.0 F) | -3.9 C (25.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1956 | 10 |
| 1957 | 40 |
| 1958 | 20 |
| 1959 | 23 |
| 1960 | 20 |
| 1961 | 31 |
| 1962 | 47 |
| 1963 | 23 |
| 1964 | 49 |
| 1965 | 41 |
| 1966 | 27 |
| 1967 | 34 |
| 1968 | 28 |
| 1969 | 28 |
| 1970 | 17 |
| 1971 | 60 |
| 1972 | 16 |
| 1973 | 37 |
| 1974 | 14 |
| 1975 | 50 |
| 1976 | 24 |
| 1977 | 24 |
| 1978 | 17 |
| 1979 | 31 |
| 1980 | 20 |
| 1981 | 23 |
| 1982 | 12 |
| 1983 | 20 |
| 1984 | 10 |
| 1985 | 19 |
| 1986 | 33 |
| 1987 | 18 |
| 1988 | 24 |
| 1989 | 1 |
| 1992 | 17 |
| 1993 | 17 |
| 1994 | 12 |
| 1995 | 20 |
| 1996 | 26 |
| 1997 | 30 |
| 1998 | 41 |
| 1999 | 35 |
| 2000 | 41 |
| 2001 | 18 |
| 2002 | 13 |
| 2003 | 26 |
| 2004 | 20 |
| 2005 | 12 |
| 2006 | 18 |
| 2007 | 25 |
| 2008 | 97 |
| 2009 | 41 |
| 2010 | 21 |
| 2011 | 23 |
| 2012 | 20 |
All-Time Record Progression
4 new records| Date | Kind | Detail |
|---|---|---|
| 1998-06-22 | Record high maximum temperature | Record high maximum temperature 50.6 C (123.1 F) |
| 1998-07-09 | Record high minimum temperature | Record high minimum temperature 30.6 C (87.1 F) |
| 2008-07-01 | Record high minimum temperature | Record high minimum temperature 32.8 C (91.0 F) |
| 2008-07-23 | Record high minimum temperature | Record high minimum temperature 35.6 C (96.1 F) |
Wettest Day of Each Month
Sep: 143.5 mm (5.6 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 56.9 mm (2.2 in) | 19 January 1961 |
| Feb | 31.8 mm (1.3 in) | 6 February 1992 |
| Mar | 46.2 mm (1.8 in) | 2 March 1983 |
| Apr | 7.1 mm (0.28 in) | 26 April 1985 |
| May | 27.2 mm (1.1 in) | 29 May 1972 |
| Jun | 20.8 mm (0.8 in) | 24 June 2006 |
| Jul | 74.9 mm (2.9 in) | 29 July 1963 |
| Aug | 101.9 mm (4.0 in) | 5 August 1959 |
| Sep | 143.5 mm (5.6 in) | 22 September 1976 |
| Oct | 57.9 mm (2.3 in) | 23 October 2006 |
| Nov | 65.3 mm (2.6 in) | 11 November 1994 |
| Dec | 102.6 mm (4.0 in) | 8 December 1988 |
Period of Record Coverage
1956 to 2012| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1956 | 136 | 37% | No |
| 1957 | 365 | 100% | Yes |
| 1958 | 358 | 98% | Yes |
| 1959 | 365 | 100% | Yes |
| 1960 | 366 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 365 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 364 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 363 | 99% | 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 | 365 | 100% | Yes |
| 1980 | 365 | 100% | Yes |
| 1981 | 364 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 364 | 100% | Yes |
| 1986 | 304 | 83% | No |
| 1987 | 365 | 100% | Yes |
| 1988 | 335 | 92% | Yes |
| 1989 | 60 | 16% | No |
| 1992 | 316 | 86% | No |
| 1993 | 360 | 99% | Yes |
| 1994 | 336 | 92% | Yes |
| 1995 | 354 | 97% | Yes |
| 1996 | 366 | 100% | Yes |
| 1997 | 365 | 100% | Yes |
| 1998 | 365 | 100% | Yes |
| 1999 | 306 | 84% | No |
| 2000 | 366 | 100% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 221 | 61% | No |
| 2003 | 333 | 91% | Yes |
| 2004 | 257 | 70% | No |
| 2005 | 162 | 44% | No |
| 2006 | 346 | 95% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 351 | 96% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 364 | 100% | Yes |
| 2012 | 335 | 92% | Yes |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 20 November 2012 | San Isidro, MX | daily high min (Tie) | 11.7 C (53.1 F) | tie | 4 years | 1 of 100 (Routine) |
| 18 November 2012 | San Isidro, MX | daily high min | 17.8 C (64.0 F) | 2.8 C (5.0 F) | 26 years | 20 of 100 (Routine) |
| 17 November 2012 | San Isidro, MX | daily high min | 18.9 C (66.0 F) | 1.1 C (2.0 F) | 26 years | 15 of 100 (Routine) |
| 15 November 2012 | San Isidro, MX | daily low max | 18.9 C (66.0 F) | 1.7 C (3.1 F) | 48 years | 23 of 100 (Routine) |
| 12 November 2012 | San Isidro, MX | daily low max | 20.6 C (69.1 F) | 1.6 C (2.9 F) | 40 years | 20 of 100 (Routine) |
| 11 November 2012 | San Isidro, MX | daily low max | 18.9 C (66.0 F) | 3.9 C (7.0 F) | 20 years | 20 of 100 (Routine) |
| 9 November 2012 | San Isidro, MX | daily high min | 17.8 C (64.0 F) | 2.2 C (4.0 F) | 38 years | 22 of 100 (Routine) |
| 17 October 2012 | San Isidro, MX | daily high min | 22.8 C (73.0 F) | 1.1 C (2.0 F) | 50 years | 22 of 100 (Routine) |
| 27 September 2012 | San Isidro, MX | daily low max (Tie) | 30.0 C (86.0 F) | tie | 50 years | 5 of 100 (Routine) |
| 10 September 2012 | San Isidro, MX | daily rain | 16.0 mm (0.6 in) | 1.0 mm (0.04 in) | 43 years | 17 of 100 (Routine) |
| 19 August 2012 | San Isidro, MX | daily rain | 12.7 mm (0.5 in) | 3.6 mm (0.14 in) | 9 years | 9 of 100 (Routine) |
| 17 August 2012 | San Isidro, MX | daily low max | 30.6 C (87.1 F) | 2.2 C (4.0 F) | 41 years | 24 of 100 (Routine) |
| 13 August 2012 | San Isidro, MX | daily high min (Tie) | 27.8 C (82.0 F) | tie | 45 years | 4 of 100 (Routine) |
| 12 August 2012 | San Isidro, MX | daily high min (Tie) | 28.9 C (84.0 F) | tie | 4 years | 1 of 100 (Routine) |
| 11 August 2012 | San Isidro, MX | daily high min | 28.9 C (84.0 F) | 1.1 C (2.0 F) | 9 years | 12 of 100 (Routine) |
| 10 August 2012 | San Isidro, MX | daily high max | 43.9 C (111.0 F) | 1.1 C (2.0 F) | 50 years | 23 of 100 (Routine) |
| 7 August 2012 | San Isidro, MX | daily high min (Tie) | 28.9 C (84.0 F) | tie | 3 years | 1 of 100 (Routine) |
| 14 July 2012 | San Isidro, MX | daily high min (Tie) | 28.9 C (84.0 F) | tie | 4 years | 1 of 100 (Routine) |
| 11 July 2012 | San Isidro, MX | daily high min (Tie) | 28.9 C (84.0 F) | tie | 4 years | 1 of 100 (Routine) |
| 10 July 2012 | San Isidro, MX | daily high max | 43.9 C (111.0 F) | 1.7 C (3.1 F) | 40 years | 22 of 100 (Routine) |
Climate Trend
43 complete years, 1957 to 2011| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1957 | 21.9 C | -0.26 C |
| 1958 | 22.5 C | +0.34 C |
| 1959 | 22.3 C | +0.09 C |
| 1960 | 21.2 C | -0.96 C |
| 1961 | 21.1 C | -1.12 C |
| 1962 | 21.3 C | -0.86 C |
| 1963 | 21.8 C | -0.35 C |
| 1964 | 20.5 C | -1.72 C |
| 1965 | 20.9 C | -1.28 C |
| 1966 | 21.6 C | -0.57 C |
| 1967 | 21.5 C | -0.65 C |
| 1968 | 21.2 C | -0.96 C |
| 1969 | 21.2 C | -0.97 C |
| 1970 | 21.2 C | -1.02 C |
| 1971 | 20.2 C | -1.96 C |
| 1972 | 21.3 C | -0.87 C |
| 1973 | 20.7 C | -1.53 C |
| 1974 | 20.9 C | -1.32 C |
| 1975 | 20.1 C | -2.09 C |
| 1976 | 21.0 C | -1.21 C |
| 1977 | 21.6 C | -0.58 C |
| 1978 | 22.0 C | -0.17 C |
| 1979 | 21.5 C | -0.67 C |
| 1980 | 22.8 C | +0.62 C |
| 1981 | 23.6 C | +1.43 C |
| 1982 | 22.7 C | +0.50 C |
| 1983 | 23.1 C | +0.95 C |
| 1984 | 23.1 C | +0.89 C |
| 1985 | 22.7 C | +0.53 C |
| 1987 | 22.7 C | +0.50 C |
| 1993 | 23.3 C | +1.12 C |
| 1994 | 23.0 C | +0.84 C |
| 1995 | 23.2 C | +0.97 C |
| 1996 | 23.7 C | +1.50 C |
| 1997 | 23.7 C | +1.54 C |
| 1998 | 23.2 C | +1.01 C |
| 2000 | 23.6 C | +1.38 C |
| 2001 | 23.9 C | +1.76 C |
| 2007 | 23.4 C | +1.25 C |
| 2008 | 22.5 C | +0.34 C |
| 2009 | 23.6 C | +1.43 C |
| 2010 | 23.1 C | +0.93 C |
| 2011 | 23.4 C | +1.20 C |
The annual mean temperature here has risen by 0.5 C (0.4 to 0.7) per decade over 1957 to 2011. In Fahrenheit: 0.9 F (0.7 to 1.2) 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 | 0.5 C (0.4 to 0.7) per decade | 0.9 F (0.7 to 1.2) per decade | 1957 to 2011 | 43 | Rise |
| Mean daily maximum | 0.6 C (0.4 to 0.8) per decade | 1.1 F (0.7 to 1.5) per decade | 1957 to 2011 | 43 | Rise |
| Mean daily minimum | 0.4 C (0.3 to 0.6) per decade | 0.7 F (0.5 to 1.0) per decade | 1957 to 2011 | 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
1956 to 2012| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 50.6 C (123.1 F) | 1998 | 45.0 C (113.0 F) | 55 |
| Coldest night (TNn) | -6.7 C (19.9 F) | 1971 | -1.1 C (30.0 F) | 55 |
| Wettest day (Rx1day) | 143.5 mm (5.6 in) | 1976 | 42.2 mm (1.7 in) | 55 |
| Wettest five days (Rx5day) | 146.3 mm (5.8 in) | 1976 | 54.1 mm (2.1 in) | 55 |
| Longest dry spell (CDD) | 263 days | 2010 | 149 days | 55 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1956 | 42.2 C (108.0 F) |
| 1957 | 43.3 C (109.9 F) |
| 1958 | 47.8 C (118.0 F) |
| 1959 | 45.6 C (114.1 F) |
| 1960 | 45.6 C (114.1 F) |
| 1961 | 42.8 C (109.0 F) |
| 1962 | 42.8 C (109.0 F) |
| 1963 | 42.8 C (109.0 F) |
| 1964 | 42.8 C (109.0 F) |
| 1965 | 40.0 C (104.0 F) |
| 1966 | 41.1 C (106.0 F) |
| 1967 | 41.7 C (107.1 F) |
| 1968 | 44.4 C (111.9 F) |
| 1969 | 43.9 C (111.0 F) |
| 1970 | 43.9 C (111.0 F) |
| 1971 | 40.6 C (105.1 F) |
| 1972 | 42.8 C (109.0 F) |
| 1973 | 43.3 C (109.9 F) |
| 1974 | 42.2 C (108.0 F) |
| 1975 | 40.6 C (105.1 F) |
| 1976 | 40.6 C (105.1 F) |
| 1977 | 46.7 C (116.1 F) |
| 1978 | 42.8 C (109.0 F) |
| 1979 | 45.0 C (113.0 F) |
| 1980 | 45.6 C (114.1 F) |
| 1981 | 46.7 C (116.1 F) |
| 1982 | 45.0 C (113.0 F) |
| 1983 | 45.0 C (113.0 F) |
| 1984 | 43.9 C (111.0 F) |
| 1985 | 45.6 C (114.1 F) |
| 1986 | 45.6 C (114.1 F) |
| 1987 | 45.6 C (114.1 F) |
| 1988 | 45.6 C (114.1 F) |
| 1989 | 35.6 C (96.1 F) |
| 1992 | 46.7 C (116.1 F) |
| 1993 | 46.7 C (116.1 F) |
| 1994 | 45.0 C (113.0 F) |
| 1995 | 45.0 C (113.0 F) |
| 1996 | 45.6 C (114.1 F) |
| 1997 | 46.7 C (116.1 F) |
| 1998 | 50.6 C (123.1 F) |
| 1999 | 47.8 C (118.0 F) |
| 2000 | 47.8 C (118.0 F) |
| 2001 | 45.6 C (114.1 F) |
| 2002 | 46.7 C (116.1 F) |
| 2003 | 42.8 C (109.0 F) |
| 2004 | 43.9 C (111.0 F) |
| 2005 | 40.0 C (104.0 F) |
| 2006 | 45.0 C (113.0 F) |
| 2007 | 45.0 C (113.0 F) |
| 2008 | 43.9 C (111.0 F) |
| 2009 | 42.8 C (109.0 F) |
| 2010 | 43.9 C (111.0 F) |
| 2011 | 45.6 C (114.1 F) |
| 2012 | 47.8 C (118.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1956 | -1.7 C (28.9 F) |
| 1957 | 0.6 C (33.1 F) |
| 1958 | -1.1 C (30.0 F) |
| 1959 | -1.1 C (30.0 F) |
| 1960 | -3.3 C (26.1 F) |
| 1961 | 0.6 C (33.1 F) |
| 1962 | -3.9 C (25.0 F) |
| 1963 | -2.2 C (28.0 F) |
| 1964 | -4.4 C (24.1 F) |
| 1965 | -2.2 C (28.0 F) |
| 1966 | -2.8 C (27.0 F) |
| 1967 | -0.6 C (30.9 F) |
| 1968 | -2.8 C (27.0 F) |
| 1969 | 0.0 C (32.0 F) |
| 1970 | -2.2 C (28.0 F) |
| 1971 | -6.7 C (19.9 F) |
| 1972 | -2.2 C (28.0 F) |
| 1973 | -2.8 C (27.0 F) |
| 1974 | -3.9 C (25.0 F) |
| 1975 | -2.2 C (28.0 F) |
| 1976 | -2.2 C (28.0 F) |
| 1977 | -2.2 C (28.0 F) |
| 1978 | -3.3 C (26.1 F) |
| 1979 | -1.1 C (30.0 F) |
| 1980 | 0.0 C (32.0 F) |
| 1981 | 0.0 C (32.0 F) |
| 1982 | 0.0 C (32.0 F) |
| 1983 | 1.7 C (35.1 F) |
| 1984 | 0.6 C (33.1 F) |
| 1985 | -5.0 C (23.0 F) |
| 1986 | 0.6 C (33.1 F) |
| 1987 | -4.4 C (24.1 F) |
| 1988 | -1.1 C (30.0 F) |
| 1989 | 0.0 C (32.0 F) |
| 1992 | 0.0 C (32.0 F) |
| 1993 | 0.6 C (33.1 F) |
| 1994 | 0.0 C (32.0 F) |
| 1995 | 1.7 C (35.1 F) |
| 1996 | -1.1 C (30.0 F) |
| 1997 | -1.1 C (30.0 F) |
| 1998 | -1.1 C (30.0 F) |
| 1999 | 0.0 C (32.0 F) |
| 2000 | -1.1 C (30.0 F) |
| 2001 | 0.0 C (32.0 F) |
| 2002 | -3.3 C (26.1 F) |
| 2003 | 0.6 C (33.1 F) |
| 2004 | 1.7 C (35.1 F) |
| 2005 | 0.6 C (33.1 F) |
| 2006 | 0.0 C (32.0 F) |
| 2007 | -1.1 C (30.0 F) |
| 2008 | 0.6 C (33.1 F) |
| 2009 | 0.6 C (33.1 F) |
| 2010 | 2.8 C (37.0 F) |
| 2011 | -1.1 C (30.0 F) |
| 2012 | 2.8 C (37.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1956 | 11.9 mm (0.5 in) |
| 1957 | 29.0 mm (1.1 in) |
| 1958 | 77.0 mm (3.0 in) |
| 1959 | 101.9 mm (4.0 in) |
| 1960 | 54.9 mm (2.2 in) |
| 1961 | 56.9 mm (2.2 in) |
| 1962 | 50.8 mm (2.0 in) |
| 1963 | 74.9 mm (2.9 in) |
| 1964 | 83.8 mm (3.3 in) |
| 1965 | 21.1 mm (0.8 in) |
| 1966 | 45.7 mm (1.8 in) |
| 1967 | 51.6 mm (2.0 in) |
| 1968 | 57.7 mm (2.3 in) |
| 1969 | 35.6 mm (1.4 in) |
| 1970 | 52.1 mm (2.1 in) |
| 1971 | 83.6 mm (3.3 in) |
| 1972 | 31.0 mm (1.2 in) |
| 1973 | 29.0 mm (1.1 in) |
| 1974 | 24.9 mm (1.0 in) |
| 1975 | 22.1 mm (0.9 in) |
| 1976 | 143.5 mm (5.6 in) |
| 1977 | 21.6 mm (0.9 in) |
| 1978 | 25.9 mm (1.0 in) |
| 1979 | 25.9 mm (1.0 in) |
| 1980 | 24.9 mm (1.0 in) |
| 1981 | 32.8 mm (1.3 in) |
| 1982 | 65.8 mm (2.6 in) |
| 1983 | 46.2 mm (1.8 in) |
| 1984 | 20.1 mm (0.8 in) |
| 1985 | 79.8 mm (3.1 in) |
| 1986 | 79.8 mm (3.1 in) |
| 1987 | 42.2 mm (1.7 in) |
| 1988 | 102.6 mm (4.0 in) |
| 1989 | 17.5 mm (0.7 in) |
| 1992 | 78.0 mm (3.1 in) |
| 1993 | 88.1 mm (3.5 in) |
| 1994 | 97.3 mm (3.8 in) |
| 1995 | 33.8 mm (1.3 in) |
| 1996 | 45.0 mm (1.8 in) |
| 1997 | 36.8 mm (1.4 in) |
| 1998 | 47.8 mm (1.9 in) |
| 1999 | 7.4 mm (0.29 in) |
| 2000 | 17.8 mm (0.7 in) |
| 2001 | 47.8 mm (1.9 in) |
| 2002 | 34.3 mm (1.4 in) |
| 2003 | 81.8 mm (3.2 in) |
| 2004 | 53.8 mm (2.1 in) |
| 2005 | 26.9 mm (1.1 in) |
| 2006 | 57.9 mm (2.3 in) |
| 2007 | 41.9 mm (1.6 in) |
| 2008 | 35.8 mm (1.4 in) |
| 2009 | 1.8 mm (0.07 in) |
| 2010 | 2.3 mm (0.09 in) |
| 2011 | 17.8 mm (0.7 in) |
| 2012 | 16.0 mm (0.6 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1956 | 11.9 mm (0.5 in) |
| 1957 | 30.3 mm (1.2 in) |
| 1958 | 95.5 mm (3.8 in) |
| 1959 | 131.9 mm (5.2 in) |
| 1960 | 78.1 mm (3.1 in) |
| 1961 | 67.6 mm (2.7 in) |
| 1962 | 53.6 mm (2.1 in) |
| 1963 | 82.0 mm (3.2 in) |
| 1964 | 87.9 mm (3.5 in) |
| 1965 | 31.6 mm (1.2 in) |
| 1966 | 64.7 mm (2.5 in) |
| 1967 | 55.2 mm (2.2 in) |
| 1968 | 58.2 mm (2.3 in) |
| 1969 | 54.1 mm (2.1 in) |
| 1970 | 62.5 mm (2.5 in) |
| 1971 | 92.5 mm (3.6 in) |
| 1972 | 62.6 mm (2.5 in) |
| 1973 | 30.5 mm (1.2 in) |
| 1974 | 33.5 mm (1.3 in) |
| 1975 | 22.1 mm (0.9 in) |
| 1976 | 146.3 mm (5.8 in) |
| 1977 | 28.0 mm (1.1 in) |
| 1978 | 37.9 mm (1.5 in) |
| 1979 | 33.3 mm (1.3 in) |
| 1980 | 24.9 mm (1.0 in) |
| 1981 | 37.9 mm (1.5 in) |
| 1982 | 86.9 mm (3.4 in) |
| 1983 | 51.8 mm (2.0 in) |
| 1984 | 29.5 mm (1.2 in) |
| 1985 | 79.8 mm (3.1 in) |
| 1986 | 80.6 mm (3.2 in) |
| 1987 | 60.0 mm (2.4 in) |
| 1988 | 106.2 mm (4.2 in) |
| 1989 | 22.1 mm (0.9 in) |
| 1992 | 101.1 mm (4.0 in) |
| 1993 | 88.1 mm (3.5 in) |
| 1994 | 99.3 mm (3.9 in) |
| 1995 | 33.8 mm (1.3 in) |
| 1996 | 77.0 mm (3.0 in) |
| 1997 | 36.8 mm (1.4 in) |
| 1998 | 55.7 mm (2.2 in) |
| 1999 | 10.6 mm (0.4 in) |
| 2000 | 26.5 mm (1.0 in) |
| 2001 | 60.5 mm (2.4 in) |
| 2002 | 49.2 mm (1.9 in) |
| 2003 | 86.1 mm (3.4 in) |
| 2004 | 103.1 mm (4.1 in) |
| 2005 | 26.9 mm (1.1 in) |
| 2006 | 80.8 mm (3.2 in) |
| 2007 | 42.7 mm (1.7 in) |
| 2008 | 35.8 mm (1.4 in) |
| 2009 | 1.8 mm (0.07 in) |
| 2010 | 2.3 mm (0.09 in) |
| 2011 | 26.9 mm (1.1 in) |
| 2012 | 21.3 mm (0.8 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1956 | 118 days |
| 1957 | 106 days |
| 1958 | 138 days |
| 1959 | 153 days |
| 1960 | 143 days |
| 1961 | 158 days |
| 1962 | 155 days |
| 1963 | 193 days |
| 1964 | 124 days |
| 1965 | 125 days |
| 1966 | 153 days |
| 1967 | 199 days |
| 1968 | 157 days |
| 1969 | 191 days |
| 1970 | 113 days |
| 1971 | 189 days |
| 1972 | 148 days |
| 1973 | 135 days |
| 1974 | 183 days |
| 1975 | 156 days |
| 1976 | 149 days |
| 1977 | 167 days |
| 1978 | 135 days |
| 1979 | 77 days |
| 1980 | 149 days |
| 1981 | 122 days |
| 1982 | 187 days |
| 1983 | 104 days |
| 1984 | 170 days |
| 1985 | 80 days |
| 1986 | 85 days |
| 1987 | 150 days |
| 1988 | 206 days |
| 1989 | 56 days |
| 1992 | 99 days |
| 1993 | 50 days |
| 1994 | 150 days |
| 1995 | 149 days |
| 1996 | 160 days |
| 1997 | 227 days |
| 1998 | 199 days |
| 1999 | 90 days |
| 2000 | 143 days |
| 2001 | 91 days |
| 2002 | 46 days |
| 2003 | 75 days |
| 2004 | 126 days |
| 2005 | 84 days |
| 2006 | 174 days |
| 2007 | 118 days |
| 2008 | 155 days |
| 2009 | 185 days |
| 2010 | 263 days |
| 2011 | 180 days |
| 2012 | 189 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
48 years, 1957 to 2012A day with at least 44.1 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 145.5 mm (5.7 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 44.1 mm (1.7 in) | |
| 5 years | 70.8 mm (2.8 in) | |
| 10 years | 88.7 mm (3.5 in) | |
| 25 years | 111.4 mm (4.4 in) | |
| 50 years | 128.5 mm (5.1 in) | Longer than the 48 years of record |
| 100 years | 145.5 mm (5.7 in) | Longer than the 48 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, 48 years of values from 1957 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: 143.5 mm (5.6 in) in 1976; 102.6 mm (4.0 in) in 1988; 101.9 mm (4.0 in) in 1959.
Station Changes
2 suspected2 changes were suspected in the annual mean temperature of San Isidro, at 1971 and 1981. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1971 ran 0.6 C (1.0 F) lower than in the years before (likely change).
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1981 ran 1.2 C (2.1 F) higher than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1971 | -0.6 | -1.0 | likely | 5 |
| 1981 | +1.2 | +2.1 | 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).