La Reforma Weather Records (MXN00024073)
Record envelope, standing records and threshold days for La Reforma (MXN00024073), Mexico, with 47 years of record.
Key Facts for La Reforma
- La Reforma (MXN00024073) is a weather station in Mexico at 22.75 latitude and -101.63 longitude, 2,044 m (6,706 ft) above sea level.
- The station reports from 1965 to 2011, 47 years of record.
- 1,464 records set at La Reforma still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- La Reforma set a monthly record low minimum temperature of -8.3 C (17.1 F) on 29 November 2011.
About the Station
- Location: Mexico, 22.75 latitude, -101.63 longitude.
- Elevation: 2,044 m (6,706 ft).
- Period of record: 1965 to 2011, 47 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 | 35.6 C (96.1 F) | -10.0 C (14.0 F) | n/a | n/a |
| Feb | 31.7 C (89.1 F) | -9.4 C (15.1 F) | n/a | n/a |
| Mar | 33.9 C (93.0 F) | -7.2 C (19.0 F) | n/a | n/a |
| Apr | 38.9 C (102.0 F) | -1.1 C (30.0 F) | n/a | n/a |
| May | 38.9 C (102.0 F) | 1.7 C (35.1 F) | n/a | n/a |
| Jun | 35.6 C (96.1 F) | 3.9 C (39.0 F) | n/a | n/a |
| Jul | 36.7 C (98.1 F) | 6.7 C (44.1 F) | n/a | n/a |
| Aug | 35.0 C (95.0 F) | 6.7 C (44.1 F) | n/a | n/a |
| Sep | 32.8 C (91.0 F) | 1.7 C (35.1 F) | n/a | n/a |
| Oct | 32.8 C (91.0 F) | -4.4 C (24.1 F) | n/a | n/a |
| Nov | 30.6 C (87.1 F) | -8.3 C (17.1 F) | n/a | n/a |
| Dec | 28.9 C (84.0 F) | -11.1 C (12.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1965 | 23 |
| 1966 | 39 |
| 1967 | 32 |
| 1968 | 23 |
| 1969 | 166 |
| 1970 | 51 |
| 1971 | 65 |
| 1972 | 171 |
| 1973 | 20 |
| 1974 | 20 |
| 1975 | 21 |
| 1976 | 25 |
| 1977 | 17 |
| 1978 | 9 |
| 1979 | 29 |
| 1980 | 12 |
| 1981 | 4 |
| 1982 | 22 |
| 1983 | 24 |
| 1984 | 24 |
| 1985 | 24 |
| 1986 | 26 |
| 1987 | 46 |
| 1988 | 28 |
| 1989 | 41 |
| 1990 | 17 |
| 1991 | 59 |
| 1992 | 41 |
| 1993 | 16 |
| 1994 | 24 |
| 1995 | 34 |
| 1996 | 24 |
| 1997 | 23 |
| 1998 | 46 |
| 1999 | 39 |
| 2000 | 37 |
| 2001 | 17 |
| 2002 | 13 |
| 2003 | 18 |
| 2004 | 22 |
| 2005 | 3 |
| 2006 | 8 |
| 2007 | 10 |
| 2008 | 14 |
| 2009 | 7 |
| 2010 | 22 |
| 2011 | 8 |
All-Time Record Progression
1 new records| Date | Kind | Detail |
|---|---|---|
| 1997-12-14 | Record low minimum temperature | Record low minimum temperature -11.1 C (12.0 F) |
Wettest Day of Each Month
Jul: 97.3 mm (3.8 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 57.9 mm (2.3 in) | 30 January 1984 |
| Feb | 35.8 mm (1.4 in) | 23 February 1970 |
| Mar | 34.8 mm (1.4 in) | 4 March 1968 |
| Apr | 34.8 mm (1.4 in) | 26 April 1967 |
| May | 63.5 mm (2.5 in) | 15 May 1985 |
| Jun | 81.3 mm (3.2 in) | 22 June 1971 |
| Jul | 97.3 mm (3.8 in) | 7 July 1973 |
| Aug | 81.8 mm (3.2 in) | 24 August 1994 |
| Sep | 70.1 mm (2.8 in) | 15 September 1991 |
| Oct | 67.8 mm (2.7 in) | 9 October 1990 |
| Nov | 35.3 mm (1.4 in) | 2 November 1993 |
| Dec | 44.5 mm (1.8 in) | 2 December 1979 |
Period of Record Coverage
1965 to 2011| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1965 | 342 | 94% | Yes |
| 1966 | 365 | 100% | Yes |
| 1967 | 365 | 100% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 365 | 100% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 335 | 92% | Yes |
| 1972 | 305 | 83% | No |
| 1973 | 303 | 83% | No |
| 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 | 244 | 67% | No |
| 1981 | 247 | 68% | No |
| 1982 | 303 | 83% | No |
| 1983 | 365 | 100% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 366 | 100% | Yes |
| 1989 | 365 | 100% | Yes |
| 1990 | 364 | 100% | Yes |
| 1991 | 343 | 94% | Yes |
| 1992 | 364 | 99% | Yes |
| 1993 | 364 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 365 | 100% | Yes |
| 1997 | 275 | 75% | No |
| 1998 | 358 | 98% | Yes |
| 1999 | 365 | 100% | Yes |
| 2000 | 336 | 92% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 363 | 99% | Yes |
| 2003 | 364 | 100% | Yes |
| 2004 | 326 | 89% | No |
| 2005 | 365 | 100% | Yes |
| 2006 | 364 | 100% | Yes |
| 2007 | 364 | 100% | Yes |
| 2008 | 364 | 99% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 333 | 91% | Yes |
| 2011 | 327 | 90% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 29 November 2011 | La Reforma, MX | monthly low min | -8.3 C (17.1 F) | 1.1 C (2.0 F) | 36 years | 26 of 100 (Routine) |
| 27 November 2011 | La Reforma, MX | daily low max | 10.6 C (51.1 F) | 1.1 C (2.0 F) | 1 year | 7 of 100 (Routine) |
| 27 November 2011 | La Reforma, MX | daily rain | 2.8 mm (0.11 in) | 1.5 mm (0.06 in) | 1 year | 5 of 100 (Routine) |
| 22 November 2011 | La Reforma, MX | daily high max (Tie) | 26.7 C (80.1 F) | tie | 44 years | 4 of 100 (Routine) |
| 20 November 2011 | La Reforma, MX | daily high max (Tie) | 27.8 C (82.0 F) | tie | 24 years | 2 of 100 (Routine) |
| 18 September 2011 | La Reforma, MX | daily rain | 23.1 mm (0.9 in) | 4.0 mm (0.16 in) | 12 years | 10 of 100 (Routine) |
| 14 September 2011 | La Reforma, MX | daily high max (Tie) | 30.6 C (87.1 F) | tie | 40 years | 4 of 100 (Routine) |
| 13 September 2011 | La Reforma, MX | daily low min (Tie) | 10.0 C (50.0 F) | tie | 34 years | 3 of 100 (Routine) |
| 12 September 2011 | La Reforma, MX | daily low min | 7.8 C (46.0 F) | 1.1 C (2.0 F) | 22 years | 14 of 100 (Routine) |
| 9 September 2011 | La Reforma, MX | daily low min | 6.7 C (44.1 F) | 1.1 C (2.0 F) | 25 years | 15 of 100 (Routine) |
| 8 September 2011 | La Reforma, MX | daily low min | 6.7 C (44.1 F) | 2.2 C (4.0 F) | 16 years | 17 of 100 (Routine) |
| 3 September 2011 | La Reforma, MX | daily rain | 59.2 mm (2.3 in) | 9.9 mm (0.39 in) | 22 years | 17 of 100 (Routine) |
| 29 August 2011 | La Reforma, MX | daily low min (Tie) | 8.9 C (48.0 F) | tie | 18 years | 2 of 100 (Routine) |
| 2 July 2011 | La Reforma, MX | daily low max (Tie) | 20.0 C (68.0 F) | tie | 25 years | 2 of 100 (Routine) |
| 1 July 2011 | La Reforma, MX | daily low max | 18.9 C (66.0 F) | 1.1 C (2.0 F) | 25 years | 14 of 100 (Routine) |
| 7 June 2011 | La Reforma, MX | daily low min (Tie) | 10.0 C (50.0 F) | tie | 37 years | 3 of 100 (Routine) |
| 29 May 2011 | La Reforma, MX | daily high max | 36.7 C (98.1 F) | 1.7 C (3.1 F) | 40 years | 21 of 100 (Routine) |
| 3 May 2011 | La Reforma, MX | daily low max | 20.0 C (68.0 F) | 1.7 C (3.1 F) | 44 years | 22 of 100 (Routine) |
| 10 April 2011 | La Reforma, MX | daily high max (Tie) | 33.9 C (93.0 F) | tie | 38 years | 3 of 100 (Routine) |
| 9 April 2011 | La Reforma, MX | daily high max (Tie) | 32.8 C (91.0 F) | tie | 38 years | 3 of 100 (Routine) |
Climate Trend
34 complete years, 1966 to 2009| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1966 | 17.0 C | +0.57 C |
| 1967 | 17.7 C | +1.24 C |
| 1968 | 17.5 C | +1.06 C |
| 1969 | 19.6 C | +3.12 C |
| 1970 | 18.7 C | +2.19 C |
| 1974 | 16.6 C | +0.08 C |
| 1975 | 16.3 C | -0.22 C |
| 1976 | 15.8 C | -0.68 C |
| 1977 | 16.3 C | -0.20 C |
| 1978 | 16.1 C | -0.38 C |
| 1979 | 16.5 C | 0.00 C |
| 1983 | 15.4 C | -1.08 C |
| 1984 | 15.4 C | -1.09 C |
| 1985 | 15.6 C | -0.88 C |
| 1986 | 15.5 C | -0.95 C |
| 1987 | 15.1 C | -1.41 C |
| 1988 | 15.7 C | -0.82 C |
| 1989 | 15.8 C | -0.70 C |
| 1990 | 16.1 C | -0.40 C |
| 1992 | 16.0 C | -0.49 C |
| 1993 | 16.9 C | +0.42 C |
| 1994 | 17.7 C | +1.20 C |
| 1995 | 17.3 C | +0.87 C |
| 1996 | 16.9 C | +0.39 C |
| 1998 | 16.1 C | -0.38 C |
| 1999 | 15.8 C | -0.65 C |
| 2001 | 17.3 C | +0.82 C |
| 2002 | 16.5 C | -0.01 C |
| 2003 | 16.0 C | -0.52 C |
| 2005 | 16.6 C | +0.16 C |
| 2006 | 16.4 C | -0.06 C |
| 2007 | 16.1 C | -0.36 C |
| 2008 | 15.7 C | -0.75 C |
| 2009 | 16.5 C | +0.06 C |
The fitted trend in annual mean temperature here over 1966 to 2009 is -0.24 C (-0.49 to 0.01) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.44 F (-0.89 to 0.01) per decade. The slope is a straight line fitted to 34 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | -0.24 C (-0.49 to 0.01) per decade | -0.44 F (-0.89 to 0.01) per decade | 1966 to 2009 | 34 | Not clearly different from zero |
| Mean daily maximum | -0.2 C (-0.5 to 0.2) per decade | -0.3 F (-0.9 to 0.3) per decade | 1966 to 2009 | 34 | Not clearly different from zero |
| Mean daily minimum | -0.3 C (-0.6 to -0.1) per decade | -0.6 F (-1.1 to -0.2) per decade | 1966 to 2009 | 34 | 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
1965 to 2011| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 38.9 C (102.0 F) | 1969 | 33.9 C (93.0 F) | 47 |
| Coldest night (TNn) | -11.1 C (12.0 F) | 1997 | -5.0 C (23.0 F) | 47 |
| Wettest day (Rx1day) | 97.3 mm (3.8 in) | 1973 | 44.5 mm (1.8 in) | 47 |
| Wettest five days (Rx5day) | 253.5 mm (10.0 in) | 1973 | 77.5 mm (3.1 in) | 47 |
| Longest dry spell (CDD) | 195 days | 1996 | 78 days | 47 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1965 | 35.6 C (96.1 F) |
| 1966 | 33.9 C (93.0 F) |
| 1967 | 35.0 C (95.0 F) |
| 1968 | 33.3 C (91.9 F) |
| 1969 | 38.9 C (102.0 F) |
| 1970 | 35.0 C (95.0 F) |
| 1971 | 35.6 C (96.1 F) |
| 1972 | 38.9 C (102.0 F) |
| 1973 | 33.9 C (93.0 F) |
| 1974 | 33.9 C (93.0 F) |
| 1975 | 33.9 C (93.0 F) |
| 1976 | 32.8 C (91.0 F) |
| 1977 | 32.2 C (90.0 F) |
| 1978 | 33.9 C (93.0 F) |
| 1979 | 33.3 C (91.9 F) |
| 1980 | 35.0 C (95.0 F) |
| 1981 | 30.6 C (87.1 F) |
| 1982 | 32.8 C (91.0 F) |
| 1983 | 33.9 C (93.0 F) |
| 1984 | 31.7 C (89.1 F) |
| 1985 | 33.9 C (93.0 F) |
| 1986 | 31.7 C (89.1 F) |
| 1987 | 30.6 C (87.1 F) |
| 1988 | 31.7 C (89.1 F) |
| 1989 | 35.0 C (95.0 F) |
| 1990 | 35.0 C (95.0 F) |
| 1991 | 35.0 C (95.0 F) |
| 1992 | 32.8 C (91.0 F) |
| 1993 | 36.7 C (98.1 F) |
| 1994 | 35.0 C (95.0 F) |
| 1995 | 36.7 C (98.1 F) |
| 1996 | 36.7 C (98.1 F) |
| 1997 | 32.8 C (91.0 F) |
| 1998 | 35.6 C (96.1 F) |
| 1999 | 33.9 C (93.0 F) |
| 2000 | 35.0 C (95.0 F) |
| 2001 | 35.0 C (95.0 F) |
| 2002 | 36.7 C (98.1 F) |
| 2003 | 35.0 C (95.0 F) |
| 2004 | 33.9 C (93.0 F) |
| 2005 | 35.0 C (95.0 F) |
| 2006 | 32.8 C (91.0 F) |
| 2007 | 33.9 C (93.0 F) |
| 2008 | 35.0 C (95.0 F) |
| 2009 | 33.9 C (93.0 F) |
| 2010 | 35.0 C (95.0 F) |
| 2011 | 36.7 C (98.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1965 | -3.3 C (26.1 F) |
| 1966 | -4.4 C (24.1 F) |
| 1967 | -7.2 C (19.0 F) |
| 1968 | -2.2 C (28.0 F) |
| 1969 | 0.6 C (33.1 F) |
| 1970 | -5.0 C (23.0 F) |
| 1971 | 0.6 C (33.1 F) |
| 1972 | -8.9 C (16.0 F) |
| 1973 | -5.0 C (23.0 F) |
| 1974 | -4.4 C (24.1 F) |
| 1975 | -9.4 C (15.1 F) |
| 1976 | -9.4 C (15.1 F) |
| 1977 | -5.0 C (23.0 F) |
| 1978 | -4.4 C (24.1 F) |
| 1979 | -7.2 C (19.0 F) |
| 1980 | -3.3 C (26.1 F) |
| 1981 | -4.4 C (24.1 F) |
| 1982 | -6.1 C (21.0 F) |
| 1983 | -4.4 C (24.1 F) |
| 1984 | -5.6 C (21.9 F) |
| 1985 | -10.0 C (14.0 F) |
| 1986 | -6.1 C (21.0 F) |
| 1987 | -6.1 C (21.0 F) |
| 1988 | -8.3 C (17.1 F) |
| 1989 | -7.2 C (19.0 F) |
| 1990 | -7.2 C (19.0 F) |
| 1991 | -5.0 C (23.0 F) |
| 1992 | -3.3 C (26.1 F) |
| 1993 | -2.2 C (28.0 F) |
| 1994 | -3.3 C (26.1 F) |
| 1995 | -4.4 C (24.1 F) |
| 1996 | -6.1 C (21.0 F) |
| 1997 | -11.1 C (12.0 F) |
| 1998 | -6.1 C (21.0 F) |
| 1999 | -8.3 C (17.1 F) |
| 2000 | -8.3 C (17.1 F) |
| 2001 | -5.0 C (23.0 F) |
| 2002 | -4.4 C (24.1 F) |
| 2003 | -9.4 C (15.1 F) |
| 2004 | -7.2 C (19.0 F) |
| 2005 | -4.4 C (24.1 F) |
| 2006 | -8.3 C (17.1 F) |
| 2007 | -4.4 C (24.1 F) |
| 2008 | -5.0 C (23.0 F) |
| 2009 | -5.0 C (23.0 F) |
| 2010 | -7.2 C (19.0 F) |
| 2011 | -8.3 C (17.1 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1965 | 27.7 mm (1.1 in) |
| 1966 | 63.0 mm (2.5 in) |
| 1967 | 61.0 mm (2.4 in) |
| 1968 | 43.9 mm (1.7 in) |
| 1969 | 43.4 mm (1.7 in) |
| 1970 | 63.0 mm (2.5 in) |
| 1971 | 81.3 mm (3.2 in) |
| 1972 | 41.9 mm (1.6 in) |
| 1973 | 97.3 mm (3.8 in) |
| 1974 | 38.9 mm (1.5 in) |
| 1975 | 40.1 mm (1.6 in) |
| 1976 | 64.3 mm (2.5 in) |
| 1977 | 38.4 mm (1.5 in) |
| 1978 | 42.7 mm (1.7 in) |
| 1979 | 44.5 mm (1.8 in) |
| 1980 | 31.8 mm (1.3 in) |
| 1981 | 70.1 mm (2.8 in) |
| 1982 | 50.0 mm (2.0 in) |
| 1983 | 43.4 mm (1.7 in) |
| 1984 | 57.9 mm (2.3 in) |
| 1985 | 63.5 mm (2.5 in) |
| 1986 | 27.7 mm (1.1 in) |
| 1987 | 43.9 mm (1.7 in) |
| 1988 | 67.1 mm (2.6 in) |
| 1989 | 23.9 mm (0.9 in) |
| 1990 | 67.8 mm (2.7 in) |
| 1991 | 70.1 mm (2.8 in) |
| 1992 | 44.7 mm (1.8 in) |
| 1993 | 73.9 mm (2.9 in) |
| 1994 | 81.8 mm (3.2 in) |
| 1995 | 59.9 mm (2.4 in) |
| 1996 | 21.3 mm (0.8 in) |
| 1997 | 39.9 mm (1.6 in) |
| 1998 | 42.4 mm (1.7 in) |
| 1999 | 32.8 mm (1.3 in) |
| 2000 | 19.8 mm (0.8 in) |
| 2001 | 37.8 mm (1.5 in) |
| 2002 | 59.9 mm (2.4 in) |
| 2003 | 51.1 mm (2.0 in) |
| 2004 | 36.8 mm (1.4 in) |
| 2005 | 48.0 mm (1.9 in) |
| 2006 | 26.2 mm (1.0 in) |
| 2007 | 48.8 mm (1.9 in) |
| 2008 | 22.1 mm (0.9 in) |
| 2009 | 53.3 mm (2.1 in) |
| 2010 | 30.2 mm (1.2 in) |
| 2011 | 59.2 mm (2.3 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1965 | 93.5 mm (3.7 in) |
| 1966 | 112.5 mm (4.4 in) |
| 1967 | 98.8 mm (3.9 in) |
| 1968 | 62.3 mm (2.5 in) |
| 1969 | 87.1 mm (3.4 in) |
| 1970 | 79.0 mm (3.1 in) |
| 1971 | 124.2 mm (4.9 in) |
| 1972 | 70.4 mm (2.8 in) |
| 1973 | 253.5 mm (10.0 in) |
| 1974 | 48.5 mm (1.9 in) |
| 1975 | 93.8 mm (3.7 in) |
| 1976 | 164.9 mm (6.5 in) |
| 1977 | 74.8 mm (2.9 in) |
| 1978 | 75.7 mm (3.0 in) |
| 1979 | 68.0 mm (2.7 in) |
| 1980 | 34.0 mm (1.3 in) |
| 1981 | 70.1 mm (2.8 in) |
| 1982 | 114.8 mm (4.5 in) |
| 1983 | 69.1 mm (2.7 in) |
| 1984 | 85.4 mm (3.4 in) |
| 1985 | 63.5 mm (2.5 in) |
| 1986 | 39.7 mm (1.6 in) |
| 1987 | 50.1 mm (2.0 in) |
| 1988 | 123.2 mm (4.9 in) |
| 1989 | 33.3 mm (1.3 in) |
| 1990 | 79.3 mm (3.1 in) |
| 1991 | 153.7 mm (6.1 in) |
| 1992 | 77.5 mm (3.1 in) |
| 1993 | 104.3 mm (4.1 in) |
| 1994 | 127.4 mm (5.0 in) |
| 1995 | 108.9 mm (4.3 in) |
| 1996 | 41.1 mm (1.6 in) |
| 1997 | 54.2 mm (2.1 in) |
| 1998 | 68.3 mm (2.7 in) |
| 1999 | 39.4 mm (1.6 in) |
| 2000 | 33.3 mm (1.3 in) |
| 2001 | 81.2 mm (3.2 in) |
| 2002 | 81.7 mm (3.2 in) |
| 2003 | 131.6 mm (5.2 in) |
| 2004 | 82.5 mm (3.2 in) |
| 2005 | 48.0 mm (1.9 in) |
| 2006 | 39.9 mm (1.6 in) |
| 2007 | 97.4 mm (3.8 in) |
| 2008 | 60.4 mm (2.4 in) |
| 2009 | 110.2 mm (4.3 in) |
| 2010 | 55.8 mm (2.2 in) |
| 2011 | 70.2 mm (2.8 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1965 | 54 days |
| 1966 | 72 days |
| 1967 | 43 days |
| 1968 | 36 days |
| 1969 | 62 days |
| 1970 | 77 days |
| 1971 | 72 days |
| 1972 | 52 days |
| 1973 | 75 days |
| 1974 | 75 days |
| 1975 | 116 days |
| 1976 | 76 days |
| 1977 | 99 days |
| 1978 | 53 days |
| 1979 | 45 days |
| 1980 | 53 days |
| 1981 | 31 days |
| 1982 | 79 days |
| 1983 | 74 days |
| 1984 | 81 days |
| 1985 | 89 days |
| 1986 | 87 days |
| 1987 | 78 days |
| 1988 | 106 days |
| 1989 | 130 days |
| 1990 | 68 days |
| 1991 | 123 days |
| 1992 | 95 days |
| 1993 | 103 days |
| 1994 | 120 days |
| 1995 | 94 days |
| 1996 | 195 days |
| 1997 | 67 days |
| 1998 | 159 days |
| 1999 | 176 days |
| 2000 | 117 days |
| 2001 | 116 days |
| 2002 | 89 days |
| 2003 | 119 days |
| 2004 | 30 days |
| 2005 | 72 days |
| 2006 | 110 days |
| 2007 | 57 days |
| 2008 | 65 days |
| 2009 | 77 days |
| 2010 | 92 days |
| 2011 | 172 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
31 years with a frostAcross 31 years with a frost, the median last spring frost at La Reforma falls on 6 March and the median first autumn frost on 11 November, which leaves a median of 253 days between them.
Fitted over all years, the growing season changes by -5.4 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1967 to 2009) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 6 March | n/a | 6 March | n/a | +4.0 days per decade |
| First autumn frost | 11 November | n/a | 10 November | n/a | -1.4 days per decade |
| Growing days | 253 days | n/a | 253 days | n/a | -5.4 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
40 years, 1965 to 2011A day with at least 47.8 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 88.2 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 | 47.8 mm (1.9 in) | |
| 5 years | 62.9 mm (2.5 in) | |
| 10 years | 70.9 mm (2.8 in) | |
| 25 years | 79.1 mm (3.1 in) | |
| 50 years | 84.0 mm (3.3 in) | Longer than the 40 years of record |
| 100 years | 88.2 mm (3.5 in) | Longer than the 40 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, 40 years of values from 1965 to 2011.
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 1994; 81.3 mm (3.2 in) in 1971; 73.9 mm (2.9 in) in 1993.
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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).