Santa Clara Weather Records (MXN00010074)
Record envelope, standing records and threshold days for Santa Clara (MXN00010074), Mexico, with 47 years of record.
Key Facts for Santa Clara
- Santa Clara (MXN00010074) is a weather station in Mexico at 24.47 latitude and -103.35 longitude, 1,800 m (5,905 ft) above sea level.
- The station reports from 1963 to 2009, 47 years of record.
- 1,464 records set at Santa Clara still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Santa Clara set a daily record low maximum temperature of 18.9 C (66.0 F) on 31 August 2009.
About the Station
- Location: Mexico, 24.47 latitude, -103.35 longitude.
- Elevation: 1,800 m (5,905 ft).
- Period of record: 1963 to 2009, 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 | 30.6 C (87.1 F) | -12.2 C (10.0 F) | n/a | n/a |
| Feb | 33.3 C (91.9 F) | -8.3 C (17.1 F) | n/a | n/a |
| Mar | 37.8 C (100.0 F) | -8.3 C (17.1 F) | n/a | n/a |
| Apr | 38.9 C (102.0 F) | -4.4 C (24.1 F) | n/a | n/a |
| May | 40.6 C (105.1 F) | 1.7 C (35.1 F) | n/a | n/a |
| Jun | 42.2 C (108.0 F) | 3.9 C (39.0 F) | n/a | n/a |
| Jul | 39.4 C (102.9 F) | 6.7 C (44.1 F) | n/a | n/a |
| Aug | 38.3 C (100.9 F) | 6.7 C (44.1 F) | n/a | n/a |
| Sep | 35.0 C (95.0 F) | 0.0 C (32.0 F) | n/a | n/a |
| Oct | 35.0 C (95.0 F) | -5.0 C (23.0 F) | n/a | n/a |
| Nov | 35.0 C (95.0 F) | -8.3 C (17.1 F) | n/a | n/a |
| Dec | 30.6 C (87.1 F) | -13.3 C (8.1 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1963 | 29 |
| 1964 | 44 |
| 1965 | 36 |
| 1966 | 44 |
| 1967 | 68 |
| 1968 | 22 |
| 1969 | 55 |
| 1970 | 42 |
| 1971 | 57 |
| 1972 | 15 |
| 1973 | 64 |
| 1974 | 55 |
| 1975 | 25 |
| 1976 | 44 |
| 1977 | 10 |
| 1978 | 19 |
| 1979 | 38 |
| 1980 | 15 |
| 1981 | 12 |
| 1982 | 61 |
| 1983 | 32 |
| 1984 | 40 |
| 1985 | 19 |
| 1986 | 15 |
| 1987 | 30 |
| 1988 | 24 |
| 1989 | 30 |
| 1990 | 36 |
| 1991 | 32 |
| 1992 | 43 |
| 1993 | 62 |
| 1994 | 19 |
| 1995 | 18 |
| 1996 | 19 |
| 1997 | 39 |
| 1998 | 26 |
| 1999 | 26 |
| 2000 | 19 |
| 2001 | 13 |
| 2002 | 28 |
| 2003 | 31 |
| 2004 | 15 |
| 2005 | 18 |
| 2006 | 19 |
| 2007 | 17 |
| 2008 | 23 |
| 2009 | 16 |
All-Time Record Progression
1 new records| Date | Kind | Detail |
|---|---|---|
| 1997-12-13 | Record low minimum temperature | Record low minimum temperature -13.3 C (8.1 F) |
Wettest Day of Each Month
Aug: 86.9 mm (3.4 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 30.0 mm (1.2 in) | 12 January 1987 |
| Feb | 35.3 mm (1.4 in) | 26 February 1987 |
| Mar | 41.9 mm (1.6 in) | 3 March 1968 |
| Apr | 32.3 mm (1.3 in) | 14 April 1985 |
| May | 32.8 mm (1.3 in) | 16 May 2006 |
| Jun | 37.3 mm (1.5 in) | 10 June 2003 |
| Jul | 81.8 mm (3.2 in) | 26 July 2005 |
| Aug | 86.9 mm (3.4 in) | 21 August 1989 |
| Sep | 76.7 mm (3.0 in) | 10 September 2001 |
| Oct | 47.8 mm (1.9 in) | 22 October 2006 |
| Nov | 39.4 mm (1.6 in) | 13 November 1986 |
| Dec | 31.5 mm (1.2 in) | 2 December 1965 |
Period of Record Coverage
1963 to 2009| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1963 | 214 | 59% | No |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 363 | 99% | Yes |
| 1967 | 363 | 99% | Yes |
| 1968 | 366 | 100% | Yes |
| 1969 | 360 | 99% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 167 | 46% | No |
| 1973 | 365 | 100% | Yes |
| 1974 | 334 | 92% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 364 | 100% | Yes |
| 1978 | 364 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 365 | 100% | Yes |
| 1984 | 366 | 100% | Yes |
| 1985 | 365 | 100% | Yes |
| 1986 | 365 | 100% | Yes |
| 1987 | 365 | 100% | Yes |
| 1988 | 365 | 100% | Yes |
| 1989 | 364 | 100% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 333 | 91% | Yes |
| 1992 | 366 | 100% | Yes |
| 1993 | 363 | 99% | Yes |
| 1994 | 364 | 100% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 365 | 100% | Yes |
| 1997 | 365 | 100% | Yes |
| 1998 | 364 | 100% | Yes |
| 1999 | 365 | 100% | Yes |
| 2000 | 364 | 99% | Yes |
| 2001 | 361 | 99% | Yes |
| 2002 | 364 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 363 | 99% | Yes |
| 2007 | 364 | 100% | Yes |
| 2008 | 365 | 100% | Yes |
| 2009 | 273 | 75% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 31 August 2009 | Santa Clara, MX | daily low max | 18.9 C (66.0 F) | 2.8 C (5.0 F) | 38 years | 24 of 100 (Routine) |
| 30 August 2009 | Santa Clara, MX | monthly low max (Tie) | 17.8 C (64.0 F) | tie | 38 years | 6 of 100 (Routine) |
| 6 August 2009 | Santa Clara, MX | daily high min | 17.8 C (64.0 F) | 0.6 C (1.1 F) | 16 years | 11 of 100 (Routine) |
| 29 July 2009 | Santa Clara, MX | daily high min | 17.8 C (64.0 F) | 0.6 C (1.1 F) | 44 years | 20 of 100 (Routine) |
| 8 June 2009 | Santa Clara, MX | daily rain | 22.4 mm (0.9 in) | 13.0 mm (0.5 in) | 36 years | 20 of 100 (Routine) |
| 20 May 2009 | Santa Clara, MX | daily rain | 11.9 mm (0.5 in) | 5.0 mm (0.20 in) | 42 years | 20 of 100 (Routine) |
| 5 May 2009 | Santa Clara, MX | daily high max | 38.3 C (100.9 F) | 1.1 C (2.0 F) | 44 years | 20 of 100 (Routine) |
| 29 April 2009 | Santa Clara, MX | daily high max (Tie) | 37.2 C (99.0 F) | tie | 26 years | 2 of 100 (Routine) |
| 28 April 2009 | Santa Clara, MX | daily high max | 36.7 C (98.1 F) | 1.7 C (3.1 F) | 43 years | 20 of 100 (Routine) |
| 3 April 2009 | Santa Clara, MX | daily low min | 1.1 C (34.0 F) | 0.6 C (1.1 F) | 22 years | 11 of 100 (Routine) |
| 14 March 2009 | Santa Clara, MX | daily low max | 13.9 C (57.0 F) | 2.8 C (5.0 F) | 35 years | 20 of 100 (Routine) |
| 4 March 2009 | Santa Clara, MX | daily high max | 32.2 C (90.0 F) | 0.5 C (0.9 F) | 12 years | 8 of 100 (Routine) |
| 2 March 2009 | Santa Clara, MX | daily low min (Tie) | -2.2 C (28.0 F) | tie | 12 years | 1 of 100 (Routine) |
| 27 February 2009 | Santa Clara, MX | daily high max | 30.6 C (87.1 F) | 0.6 C (1.1 F) | 20 years | 11 of 100 (Routine) |
| 26 February 2009 | Santa Clara, MX | monthly high max | 33.3 C (91.9 F) | 1.1 C (2.0 F) | 21 years | 22 of 100 (Routine) |
| 17 February 2009 | Santa Clara, MX | daily high max (Tie) | 31.1 C (88.0 F) | tie | 3 years | 1 of 100 (Routine) |
| 16 February 2009 | Santa Clara, MX | daily high max | 31.1 C (88.0 F) | 1.1 C (2.0 F) | 33 years | 15 of 100 (Routine) |
| 26 January 2009 | Santa Clara, MX | daily high max (Tie) | 29.4 C (84.9 F) | tie | 9 years | 1 of 100 (Routine) |
| 9 January 2009 | Santa Clara, MX | monthly high max (Tie) | 30.6 C (87.1 F) | tie | 34 years | 6 of 100 (Routine) |
| 6 January 2009 | Santa Clara, MX | daily high min | 10.6 C (51.1 F) | 0.6 C (1.1 F) | 16 years | 9 of 100 (Routine) |
Climate Trend
42 complete years, 1964 to 2008| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1964 | 18.3 C | +0.89 C |
| 1965 | 18.3 C | +0.86 C |
| 1966 | 18.0 C | +0.56 C |
| 1967 | 16.5 C | -0.93 C |
| 1968 | 17.7 C | +0.22 C |
| 1969 | 18.7 C | +1.30 C |
| 1970 | 18.3 C | +0.88 C |
| 1971 | 16.8 C | -0.61 C |
| 1973 | 16.8 C | -0.60 C |
| 1975 | 16.9 C | -0.55 C |
| 1976 | 17.0 C | -0.40 C |
| 1977 | 17.1 C | -0.37 C |
| 1978 | 17.3 C | -0.14 C |
| 1979 | 16.3 C | -1.11 C |
| 1980 | 17.2 C | -0.26 C |
| 1981 | 17.3 C | -0.11 C |
| 1982 | 17.8 C | +0.36 C |
| 1983 | 16.9 C | -0.53 C |
| 1984 | 17.3 C | -0.17 C |
| 1985 | 17.5 C | +0.04 C |
| 1986 | 17.1 C | -0.30 C |
| 1987 | 16.5 C | -0.91 C |
| 1988 | 17.2 C | -0.21 C |
| 1989 | 17.7 C | +0.24 C |
| 1990 | 17.9 C | +0.44 C |
| 1992 | 17.2 C | -0.24 C |
| 1993 | 18.6 C | +1.11 C |
| 1994 | 18.2 C | +0.73 C |
| 1995 | 17.9 C | +0.50 C |
| 1996 | 17.3 C | -0.11 C |
| 1997 | 16.8 C | -0.67 C |
| 1998 | 17.8 C | +0.36 C |
| 1999 | 17.2 C | -0.25 C |
| 2000 | 17.5 C | +0.09 C |
| 2001 | 17.7 C | +0.26 C |
| 2002 | 17.6 C | +0.15 C |
| 2003 | 17.3 C | -0.13 C |
| 2004 | 16.9 C | -0.54 C |
| 2005 | 17.5 C | +0.06 C |
| 2006 | 17.7 C | +0.25 C |
| 2007 | 17.4 C | -0.04 C |
| 2008 | 17.3 C | -0.11 C |
The fitted trend in annual mean temperature here over 1964 to 2008 is -0.03 C (-0.16 to 0.11) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.3 to 0.2) per decade. The slope is a straight line fitted to 42 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | -0.03 C (-0.16 to 0.11) per decade | -0.1 F (-0.3 to 0.2) per decade | 1964 to 2008 | 42 | Not clearly different from zero |
| Mean daily maximum | -0.13 C (-0.31 to 0.05) per decade | -0.2 F (-0.6 to 0.1) per decade | 1964 to 2008 | 42 | Not clearly different from zero |
| Mean daily minimum | 0.1 C (-0.1 to 0.3) per decade | 0.1 F (-0.2 to 0.5) per decade | 1964 to 2008 | 42 | Not clearly different from zero |
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
1963 to 2009| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 42.2 C (108.0 F) | 1993 | 37.8 C (100.0 F) | 47 |
| Coldest night (TNn) | -13.3 C (8.1 F) | 1997 | -7.2 C (19.0 F) | 47 |
| Wettest day (Rx1day) | 86.9 mm (3.4 in) | 1989 | 42.2 mm (1.7 in) | 47 |
| Wettest five days (Rx5day) | 155.0 mm (6.1 in) | 1971 | 76.5 mm (3.0 in) | 47 |
| Longest dry spell (CDD) | 138 days | 1969 | 86 days | 47 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1963 | 37.8 C (100.0 F) |
| 1964 | 38.9 C (102.0 F) |
| 1965 | 37.8 C (100.0 F) |
| 1966 | 38.3 C (100.9 F) |
| 1967 | 36.7 C (98.1 F) |
| 1968 | 40.0 C (104.0 F) |
| 1969 | 38.9 C (102.0 F) |
| 1970 | 40.0 C (104.0 F) |
| 1971 | 38.9 C (102.0 F) |
| 1972 | 33.9 C (93.0 F) |
| 1973 | 37.8 C (100.0 F) |
| 1974 | 38.9 C (102.0 F) |
| 1975 | 36.7 C (98.1 F) |
| 1976 | 40.6 C (105.1 F) |
| 1977 | 35.0 C (95.0 F) |
| 1978 | 37.8 C (100.0 F) |
| 1979 | 35.0 C (95.0 F) |
| 1980 | 37.8 C (100.0 F) |
| 1981 | 37.8 C (100.0 F) |
| 1982 | 40.6 C (105.1 F) |
| 1983 | 40.0 C (104.0 F) |
| 1984 | 37.2 C (99.0 F) |
| 1985 | 36.7 C (98.1 F) |
| 1986 | 35.6 C (96.1 F) |
| 1987 | 35.6 C (96.1 F) |
| 1988 | 36.1 C (97.0 F) |
| 1989 | 40.0 C (104.0 F) |
| 1990 | 38.9 C (102.0 F) |
| 1991 | 38.3 C (100.9 F) |
| 1992 | 39.4 C (102.9 F) |
| 1993 | 42.2 C (108.0 F) |
| 1994 | 35.0 C (95.0 F) |
| 1995 | 37.2 C (99.0 F) |
| 1996 | 36.7 C (98.1 F) |
| 1997 | 37.8 C (100.0 F) |
| 1998 | 37.2 C (99.0 F) |
| 1999 | 37.2 C (99.0 F) |
| 2000 | 35.0 C (95.0 F) |
| 2001 | 38.9 C (102.0 F) |
| 2002 | 36.1 C (97.0 F) |
| 2003 | 38.3 C (100.9 F) |
| 2004 | 36.7 C (98.1 F) |
| 2005 | 38.3 C (100.9 F) |
| 2006 | 37.2 C (99.0 F) |
| 2007 | 37.8 C (100.0 F) |
| 2008 | 38.3 C (100.9 F) |
| 2009 | 38.3 C (100.9 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1963 | -10.0 C (14.0 F) |
| 1964 | -10.6 C (12.9 F) |
| 1965 | -6.1 C (21.0 F) |
| 1966 | -3.9 C (25.0 F) |
| 1967 | -6.1 C (21.0 F) |
| 1968 | -6.7 C (19.9 F) |
| 1969 | -3.3 C (26.1 F) |
| 1970 | -5.0 C (23.0 F) |
| 1971 | -4.4 C (24.1 F) |
| 1972 | -2.2 C (28.0 F) |
| 1973 | -8.3 C (17.1 F) |
| 1974 | -6.1 C (21.0 F) |
| 1975 | -10.0 C (14.0 F) |
| 1976 | -6.1 C (21.0 F) |
| 1977 | -4.4 C (24.1 F) |
| 1978 | -7.2 C (19.0 F) |
| 1979 | -8.3 C (17.1 F) |
| 1980 | -6.1 C (21.0 F) |
| 1981 | -6.1 C (21.0 F) |
| 1982 | -6.1 C (21.0 F) |
| 1983 | -10.0 C (14.0 F) |
| 1984 | -6.1 C (21.0 F) |
| 1985 | -11.1 C (12.0 F) |
| 1986 | -6.1 C (21.0 F) |
| 1987 | -7.2 C (19.0 F) |
| 1988 | -9.4 C (15.1 F) |
| 1989 | -8.3 C (17.1 F) |
| 1990 | -9.4 C (15.1 F) |
| 1991 | -8.3 C (17.1 F) |
| 1992 | -8.3 C (17.1 F) |
| 1993 | -5.0 C (23.0 F) |
| 1994 | -1.1 C (30.0 F) |
| 1995 | -5.0 C (23.0 F) |
| 1996 | -7.2 C (19.0 F) |
| 1997 | -13.3 C (8.1 F) |
| 1998 | -8.3 C (17.1 F) |
| 1999 | -9.4 C (15.1 F) |
| 2000 | -7.2 C (19.0 F) |
| 2001 | -10.0 C (14.0 F) |
| 2002 | -8.3 C (17.1 F) |
| 2003 | -8.3 C (17.1 F) |
| 2004 | -10.0 C (14.0 F) |
| 2005 | -8.3 C (17.1 F) |
| 2006 | -12.2 C (10.0 F) |
| 2007 | -5.0 C (23.0 F) |
| 2008 | -10.0 C (14.0 F) |
| 2009 | -5.0 C (23.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1963 | 23.9 mm (0.9 in) |
| 1964 | 27.9 mm (1.1 in) |
| 1965 | 31.5 mm (1.2 in) |
| 1966 | 47.0 mm (1.9 in) |
| 1967 | 50.8 mm (2.0 in) |
| 1968 | 59.9 mm (2.4 in) |
| 1969 | 25.9 mm (1.0 in) |
| 1970 | 64.8 mm (2.6 in) |
| 1971 | 66.8 mm (2.6 in) |
| 1972 | 42.4 mm (1.7 in) |
| 1973 | 51.8 mm (2.0 in) |
| 1974 | 27.9 mm (1.1 in) |
| 1975 | 59.9 mm (2.4 in) |
| 1976 | 37.3 mm (1.5 in) |
| 1977 | 38.4 mm (1.5 in) |
| 1978 | 45.2 mm (1.8 in) |
| 1979 | 26.4 mm (1.0 in) |
| 1980 | 42.4 mm (1.7 in) |
| 1981 | 36.3 mm (1.4 in) |
| 1982 | 42.2 mm (1.7 in) |
| 1983 | 45.5 mm (1.8 in) |
| 1984 | 42.7 mm (1.7 in) |
| 1985 | 33.3 mm (1.3 in) |
| 1986 | 39.4 mm (1.6 in) |
| 1987 | 39.4 mm (1.6 in) |
| 1988 | 34.3 mm (1.4 in) |
| 1989 | 86.9 mm (3.4 in) |
| 1990 | 37.6 mm (1.5 in) |
| 1991 | 55.9 mm (2.2 in) |
| 1992 | 31.0 mm (1.2 in) |
| 1993 | 40.4 mm (1.6 in) |
| 1994 | 19.3 mm (0.8 in) |
| 1995 | 60.7 mm (2.4 in) |
| 1996 | 36.8 mm (1.4 in) |
| 1997 | 27.4 mm (1.1 in) |
| 1998 | 40.9 mm (1.6 in) |
| 1999 | 33.3 mm (1.3 in) |
| 2000 | 43.9 mm (1.7 in) |
| 2001 | 76.7 mm (3.0 in) |
| 2002 | 48.8 mm (1.9 in) |
| 2003 | 50.8 mm (2.0 in) |
| 2004 | 55.1 mm (2.2 in) |
| 2005 | 81.8 mm (3.2 in) |
| 2006 | 47.8 mm (1.9 in) |
| 2007 | 33.8 mm (1.3 in) |
| 2008 | 47.8 mm (1.9 in) |
| 2009 | 22.4 mm (0.9 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1963 | 51.7 mm (2.0 in) |
| 1964 | 48.2 mm (1.9 in) |
| 1965 | 49.8 mm (2.0 in) |
| 1966 | 76.9 mm (3.0 in) |
| 1967 | 80.3 mm (3.2 in) |
| 1968 | 88.1 mm (3.5 in) |
| 1969 | 63.7 mm (2.5 in) |
| 1970 | 93.3 mm (3.7 in) |
| 1971 | 155.0 mm (6.1 in) |
| 1972 | 104.7 mm (4.1 in) |
| 1973 | 123.7 mm (4.9 in) |
| 1974 | 56.7 mm (2.2 in) |
| 1975 | 103.1 mm (4.1 in) |
| 1976 | 99.9 mm (3.9 in) |
| 1977 | 46.4 mm (1.8 in) |
| 1978 | 125.7 mm (4.9 in) |
| 1979 | 50.7 mm (2.0 in) |
| 1980 | 101.3 mm (4.0 in) |
| 1981 | 69.3 mm (2.7 in) |
| 1982 | 70.0 mm (2.8 in) |
| 1983 | 107.1 mm (4.2 in) |
| 1984 | 82.1 mm (3.2 in) |
| 1985 | 59.5 mm (2.3 in) |
| 1986 | 70.9 mm (2.8 in) |
| 1987 | 61.5 mm (2.4 in) |
| 1988 | 65.6 mm (2.6 in) |
| 1989 | 127.1 mm (5.0 in) |
| 1990 | 64.3 mm (2.5 in) |
| 1991 | 93.3 mm (3.7 in) |
| 1992 | 56.4 mm (2.2 in) |
| 1993 | 51.7 mm (2.0 in) |
| 1994 | 33.0 mm (1.3 in) |
| 1995 | 89.6 mm (3.5 in) |
| 1996 | 65.0 mm (2.6 in) |
| 1997 | 39.4 mm (1.6 in) |
| 1998 | 66.0 mm (2.6 in) |
| 1999 | 76.5 mm (3.0 in) |
| 2000 | 69.6 mm (2.7 in) |
| 2001 | 84.6 mm (3.3 in) |
| 2002 | 85.2 mm (3.4 in) |
| 2003 | 93.1 mm (3.7 in) |
| 2004 | 91.3 mm (3.6 in) |
| 2005 | 97.5 mm (3.8 in) |
| 2006 | 102.4 mm (4.0 in) |
| 2007 | 63.4 mm (2.5 in) |
| 2008 | 99.4 mm (3.9 in) |
| 2009 | 68.6 mm (2.7 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1963 | 23 days |
| 1964 | 105 days |
| 1965 | 71 days |
| 1966 | 53 days |
| 1967 | 57 days |
| 1968 | 48 days |
| 1969 | 138 days |
| 1970 | 89 days |
| 1971 | 96 days |
| 1972 | 76 days |
| 1973 | 70 days |
| 1974 | 104 days |
| 1975 | 120 days |
| 1976 | 94 days |
| 1977 | 65 days |
| 1978 | 63 days |
| 1979 | 66 days |
| 1980 | 88 days |
| 1981 | 46 days |
| 1982 | 111 days |
| 1983 | 128 days |
| 1984 | 105 days |
| 1985 | 82 days |
| 1986 | 62 days |
| 1987 | 59 days |
| 1988 | 95 days |
| 1989 | 104 days |
| 1990 | 86 days |
| 1991 | 86 days |
| 1992 | 45 days |
| 1993 | 104 days |
| 1994 | 55 days |
| 1995 | 127 days |
| 1996 | 70 days |
| 1997 | 34 days |
| 1998 | 80 days |
| 1999 | 114 days |
| 2000 | 117 days |
| 2001 | 59 days |
| 2002 | 89 days |
| 2003 | 109 days |
| 2004 | 53 days |
| 2005 | 66 days |
| 2006 | 108 days |
| 2007 | 136 days |
| 2008 | 136 days |
| 2009 | 72 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
42 years with a frostAcross 42 years with a frost, the median last spring frost at Santa Clara falls on 20 March and the median first autumn frost on 8 November, which leaves a median of 233 days between them.
Fitted over all years, the growing season changes by -6.7 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1978 to 2008) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 20 March | n/a | 27 March | n/a | +5.0 days per decade |
| First autumn frost | 8 November | n/a | 7 November | n/a | -1.7 days per decade |
| Growing days | 233 days | n/a | 221 days | n/a | -6.7 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
45 years, 1964 to 2008A day with at least 42.1 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 93.9 mm (3.7 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 42.1 mm (1.7 in) | |
| 5 years | 55.4 mm (2.2 in) | |
| 10 years | 64.4 mm (2.5 in) | |
| 25 years | 76.1 mm (3.0 in) | |
| 50 years | 85.0 mm (3.3 in) | Longer than the 45 years of record |
| 100 years | 93.9 mm (3.7 in) | Longer than the 45 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, 45 years of values from 1964 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: 86.9 mm (3.4 in) in 1989; 81.8 mm (3.2 in) in 2005; 76.7 mm (3.0 in) in 2001.
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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).