Santa Rosa Weather Records (MXN00019059)
Record envelope, standing records and threshold days for Santa Rosa (MXN00019059), Mexico, with 51 years of record.
Key Facts for Santa Rosa
- Santa Rosa (MXN00019059) is a weather station in Mexico at 24.17 latitude and -100.28 longitude, 1,664 m (5,459 ft) above sea level.
- The station reports from 1961 to 2011, 51 years of record.
- 1,464 records set at Santa Rosa still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- Santa Rosa set a daily record low minimum temperature of -7.2 C (19.0 F) on 30 December 2011.
About the Station
- Location: Mexico, 24.17 latitude, -100.28 longitude.
- Elevation: 1,664 m (5,459 ft).
- Period of record: 1961 to 2011, 51 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) | -9.4 C (15.1 F) | n/a | n/a |
| Feb | 38.9 C (102.0 F) | -8.3 C (17.1 F) | n/a | n/a |
| Mar | 40.6 C (105.1 F) | -5.0 C (23.0 F) | n/a | n/a |
| Apr | 40.6 C (105.1 F) | -5.0 C (23.0 F) | n/a | n/a |
| May | 42.8 C (109.0 F) | -1.1 C (30.0 F) | n/a | n/a |
| Jun | 41.7 C (107.1 F) | -1.1 C (30.0 F) | n/a | n/a |
| Jul | 41.7 C (107.1 F) | 0.0 C (32.0 F) | n/a | n/a |
| Aug | 38.9 C (102.0 F) | 0.0 C (32.0 F) | n/a | n/a |
| Sep | 40.0 C (104.0 F) | -4.4 C (24.1 F) | n/a | n/a |
| Oct | 38.9 C (102.0 F) | -7.2 C (19.0 F) | n/a | n/a |
| Nov | 38.9 C (102.0 F) | -11.1 C (12.0 F) | n/a | n/a |
| Dec | 38.9 C (102.0 F) | -12.2 C (10.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1961 | 3 |
| 1962 | 35 |
| 1963 | 40 |
| 1964 | 21 |
| 1965 | 33 |
| 1966 | 27 |
| 1967 | 28 |
| 1968 | 14 |
| 1969 | 27 |
| 1970 | 23 |
| 1971 | 22 |
| 1972 | 9 |
| 1973 | 22 |
| 1974 | 17 |
| 1975 | 21 |
| 1976 | 51 |
| 1977 | 31 |
| 1978 | 62 |
| 1979 | 23 |
| 1980 | 57 |
| 1981 | 27 |
| 1982 | 57 |
| 1983 | 44 |
| 1984 | 41 |
| 1985 | 36 |
| 1986 | 57 |
| 1987 | 81 |
| 1988 | 28 |
| 1989 | 14 |
| 1990 | 1 |
| 1991 | 23 |
| 1992 | 30 |
| 1993 | 21 |
| 1994 | 10 |
| 1995 | 10 |
| 1996 | 73 |
| 1997 | 36 |
| 1998 | 5 |
| 1999 | 37 |
| 2000 | 21 |
| 2001 | 3 |
| 2002 | 4 |
| 2003 | 19 |
| 2004 | 5 |
| 2005 | 12 |
| 2006 | 20 |
| 2007 | 11 |
| 2008 | 15 |
| 2009 | 11 |
| 2010 | 22 |
| 2011 | 124 |
All-Time Record Progression
2 new records| Date | Kind | Detail |
|---|---|---|
| 1996-09-10 | Record high minimum temperature | Record high minimum temperature 22.8 C (73.0 F) |
| 1997-12-13 | Record low maximum temperature | Record low maximum temperature 3.9 C (39.0 F) |
Wettest Day of Each Month
May: 96.8 mm (3.8 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 50.8 mm (2.0 in) | 30 January 1984 |
| Feb | 66.8 mm (2.6 in) | 14 February 2010 |
| Mar | 39.9 mm (1.6 in) | 12 March 1983 |
| Apr | 62.0 mm (2.4 in) | 5 April 1980 |
| May | 96.8 mm (3.8 in) | 18 May 1968 |
| Jun | 49.8 mm (2.0 in) | 8 June 1979 |
| Jul | 79.8 mm (3.1 in) | 20 July 1992 |
| Aug | 57.9 mm (2.3 in) | 13 August 1966 |
| Sep | 59.9 mm (2.4 in) | 7 September 1962 |
| Oct | 39.9 mm (1.6 in) | 3 October 1990 |
| Nov | 67.8 mm (2.7 in) | 30 November 2009 |
| Dec | 45.0 mm (1.8 in) | 21 December 1985 |
Period of Record Coverage
1961 to 2011| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1961 | 42 | 12% | No |
| 1962 | 365 | 100% | Yes |
| 1963 | 363 | 99% | Yes |
| 1964 | 366 | 100% | Yes |
| 1965 | 365 | 100% | Yes |
| 1966 | 362 | 99% | Yes |
| 1967 | 358 | 98% | Yes |
| 1968 | 363 | 99% | Yes |
| 1969 | 363 | 99% | Yes |
| 1970 | 364 | 100% | Yes |
| 1971 | 364 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 337 | 92% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 337 | 92% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 365 | 100% | Yes |
| 1980 | 366 | 100% | Yes |
| 1981 | 365 | 100% | Yes |
| 1982 | 365 | 100% | Yes |
| 1983 | 362 | 99% | Yes |
| 1984 | 303 | 83% | No |
| 1985 | 364 | 100% | Yes |
| 1986 | 348 | 95% | Yes |
| 1987 | 346 | 95% | Yes |
| 1988 | 364 | 99% | Yes |
| 1989 | 31 | 8% | No |
| 1990 | 153 | 42% | No |
| 1991 | 365 | 100% | Yes |
| 1992 | 366 | 100% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 364 | 100% | Yes |
| 1995 | 334 | 92% | Yes |
| 1996 | 101 | 28% | No |
| 1997 | 364 | 100% | Yes |
| 1998 | 362 | 99% | Yes |
| 1999 | 361 | 99% | Yes |
| 2000 | 366 | 100% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 364 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 366 | 100% | Yes |
| 2005 | 364 | 100% | Yes |
| 2006 | 362 | 99% | Yes |
| 2007 | 365 | 100% | Yes |
| 2008 | 365 | 100% | Yes |
| 2009 | 364 | 100% | Yes |
| 2010 | 365 | 100% | Yes |
| 2011 | 354 | 97% | Yes |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 30 December 2011 | Santa Rosa, MX | daily low min | -7.2 C (19.0 F) | 2.2 C (4.0 F) | 0 years | 10 of 100 (Routine) |
| 28 December 2011 | Santa Rosa, MX | daily low min | -7.2 C (19.0 F) | 2.2 C (4.0 F) | 13 years | 14 of 100 (Routine) |
| 18 December 2011 | Santa Rosa, MX | daily low max | 12.8 C (55.0 F) | 1.1 C (2.0 F) | 48 years | 21 of 100 (Routine) |
| 10 December 2011 | Santa Rosa, MX | daily low max | 8.9 C (48.0 F) | 1.7 C (3.1 F) | 46 years | 22 of 100 (Routine) |
| 2 December 2011 | Santa Rosa, MX | daily low min | -8.3 C (17.1 F) | 1.1 C (2.0 F) | 0 years | 7 of 100 (Routine) |
| 1 December 2011 | Santa Rosa, MX | daily low min | -9.4 C (15.1 F) | 2.2 C (4.0 F) | 0 years | 10 of 100 (Routine) |
| 30 November 2011 | Santa Rosa, MX | daily low min | -10.0 C (14.0 F) | 0.6 C (1.1 F) | 5 years | 7 of 100 (Routine) |
| 29 November 2011 | Santa Rosa, MX | daily low min | -10.0 C (14.0 F) | 5.6 C (10.1 F) | 49 years | 32 of 100 (Routine) |
| 28 November 2011 | Santa Rosa, MX | monthly low min | -11.1 C (12.0 F) | 1.7 C (3.1 F) | 49 years | 33 of 100 (Routine) |
| 17 November 2011 | Santa Rosa, MX | daily low max | 12.8 C (55.0 F) | 3.9 C (7.0 F) | 44 years | 27 of 100 (Routine) |
| 10 November 2011 | Santa Rosa, MX | monthly low max | 6.7 C (44.1 F) | 1.1 C (2.0 F) | 30 years | 26 of 100 (Routine) |
| 9 November 2011 | Santa Rosa, MX | daily low max (Tie) | 20.0 C (68.0 F) | tie | 48 years | 4 of 100 (Routine) |
| 4 November 2011 | Santa Rosa, MX | daily low max | 17.8 C (64.0 F) | 1.1 C (2.0 F) | 12 years | 10 of 100 (Routine) |
| 3 November 2011 | Santa Rosa, MX | daily low max (Tie) | 16.7 C (62.1 F) | tie | 0 years | 1 of 100 (Routine) |
| 1 November 2011 | Santa Rosa, MX | daily low min | -2.2 C (28.0 F) | 1.1 C (2.0 F) | 48 years | 21 of 100 (Routine) |
| 21 October 2011 | Santa Rosa, MX | daily low min (Tie) | 0.0 C (32.0 F) | tie | 17 years | 2 of 100 (Routine) |
| 14 October 2011 | Santa Rosa, MX | daily low max | 16.7 C (62.1 F) | 3.9 C (7.0 F) | 44 years | 27 of 100 (Routine) |
| 12 October 2011 | Santa Rosa, MX | daily low max | 13.9 C (57.0 F) | 1.1 C (2.0 F) | 28 years | 15 of 100 (Routine) |
| 11 October 2011 | Santa Rosa, MX | daily low max | 13.9 C (57.0 F) | 3.9 C (7.0 F) | 22 years | 20 of 100 (Routine) |
| 10 October 2011 | Santa Rosa, MX | daily low max | 15.0 C (59.0 F) | 2.8 C (5.0 F) | 44 years | 25 of 100 (Routine) |
Climate Trend
43 complete years, 1962 to 2011| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1962 | 16.4 C | -0.57 C |
| 1963 | 16.4 C | -0.53 C |
| 1964 | 16.5 C | -0.44 C |
| 1965 | 14.9 C | -2.07 C |
| 1966 | 14.4 C | -2.54 C |
| 1967 | 14.6 C | -2.32 C |
| 1968 | 14.8 C | -2.16 C |
| 1969 | 15.3 C | -1.67 C |
| 1970 | 15.1 C | -1.80 C |
| 1971 | 15.5 C | -1.39 C |
| 1972 | 15.6 C | -1.34 C |
| 1974 | 17.7 C | +0.74 C |
| 1976 | 19.8 C | +2.85 C |
| 1977 | 17.1 C | +0.16 C |
| 1978 | 17.6 C | +0.70 C |
| 1979 | 17.6 C | +0.69 C |
| 1980 | 18.9 C | +1.94 C |
| 1981 | 17.0 C | +0.06 C |
| 1982 | 18.5 C | +1.58 C |
| 1983 | 17.0 C | +0.04 C |
| 1985 | 18.0 C | +1.09 C |
| 1986 | 19.0 C | +2.07 C |
| 1987 | 19.3 C | +2.36 C |
| 1988 | 16.7 C | -0.23 C |
| 1991 | 17.4 C | +0.51 C |
| 1992 | 15.5 C | -1.44 C |
| 1993 | 17.1 C | +0.19 C |
| 1994 | 17.5 C | +0.53 C |
| 1997 | 16.4 C | -0.49 C |
| 1998 | 18.5 C | +1.60 C |
| 1999 | 18.7 C | +1.75 C |
| 2000 | 17.7 C | +0.78 C |
| 2001 | 15.9 C | -1.03 C |
| 2002 | 17.0 C | +0.02 C |
| 2003 | 17.1 C | +0.18 C |
| 2004 | 17.2 C | +0.22 C |
| 2005 | 17.4 C | +0.51 C |
| 2006 | 17.7 C | +0.75 C |
| 2007 | 17.6 C | +0.65 C |
| 2008 | 17.3 C | +0.32 C |
| 2009 | 18.3 C | +1.37 C |
| 2010 | 16.6 C | -0.38 C |
| 2011 | 13.6 C | -3.34 C |
The fitted trend in annual mean temperature here over 1962 to 2011 is 0.27 C (-0.01 to 0.55) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.48 F (-0.01 to 0.98) 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 | 0.27 C (-0.01 to 0.55) per decade | 0.48 F (-0.01 to 0.98) per decade | 1962 to 2011 | 43 | Not clearly different from zero |
| Mean daily maximum | 0.3 C (-0.1 to 0.7) per decade | 0.5 F (-0.3 to 1.2) per decade | 1962 to 2011 | 43 | Not clearly different from zero |
| Mean daily minimum | 0.27 C (-0.03 to 0.57) per decade | 0.5 F (-0.1 to 1.0) per decade | 1962 to 2011 | 43 | 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
1961 to 2011| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 42.8 C (109.0 F) | 1983 | 37.8 C (100.0 F) | 51 |
| Coldest night (TNn) | -12.2 C (10.0 F) | 1977 | -5.0 C (23.0 F) | 51 |
| Wettest day (Rx1day) | 96.8 mm (3.8 in) | 1968 | 39.9 mm (1.6 in) | 51 |
| Wettest five days (Rx5day) | 131.6 mm (5.2 in) | 1978 | 59.1 mm (2.3 in) | 51 |
| Longest dry spell (CDD) | 130 days | 1971 | 64 days | 51 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1961 | 32.8 C (91.0 F) |
| 1962 | 35.0 C (95.0 F) |
| 1963 | 35.0 C (95.0 F) |
| 1964 | 35.6 C (96.1 F) |
| 1965 | 36.7 C (98.1 F) |
| 1966 | 35.0 C (95.0 F) |
| 1967 | 35.6 C (96.1 F) |
| 1968 | 33.9 C (93.0 F) |
| 1969 | 37.8 C (100.0 F) |
| 1970 | 38.9 C (102.0 F) |
| 1971 | 35.0 C (95.0 F) |
| 1972 | 33.9 C (93.0 F) |
| 1973 | 38.9 C (102.0 F) |
| 1974 | 37.8 C (100.0 F) |
| 1975 | 38.9 C (102.0 F) |
| 1976 | 40.0 C (104.0 F) |
| 1977 | 38.9 C (102.0 F) |
| 1978 | 38.9 C (102.0 F) |
| 1979 | 36.7 C (98.1 F) |
| 1980 | 40.0 C (104.0 F) |
| 1981 | 38.3 C (100.9 F) |
| 1982 | 41.7 C (107.1 F) |
| 1983 | 42.8 C (109.0 F) |
| 1984 | 41.7 C (107.1 F) |
| 1985 | 40.6 C (105.1 F) |
| 1986 | 41.7 C (107.1 F) |
| 1987 | 38.9 C (102.0 F) |
| 1988 | 35.6 C (96.1 F) |
| 1989 | 28.3 C (82.9 F) |
| 1990 | 35.0 C (95.0 F) |
| 1991 | 36.7 C (98.1 F) |
| 1992 | 35.6 C (96.1 F) |
| 1993 | 35.0 C (95.0 F) |
| 1994 | 35.0 C (95.0 F) |
| 1995 | 35.6 C (96.1 F) |
| 1996 | 40.0 C (104.0 F) |
| 1997 | 40.6 C (105.1 F) |
| 1998 | 40.0 C (104.0 F) |
| 1999 | 38.9 C (102.0 F) |
| 2000 | 37.8 C (100.0 F) |
| 2001 | 35.6 C (96.1 F) |
| 2002 | 38.9 C (102.0 F) |
| 2003 | 40.6 C (105.1 F) |
| 2004 | 37.8 C (100.0 F) |
| 2005 | 36.7 C (98.1 F) |
| 2006 | 37.8 C (100.0 F) |
| 2007 | 36.7 C (98.1 F) |
| 2008 | 36.7 C (98.1 F) |
| 2009 | 38.9 C (102.0 F) |
| 2010 | 38.9 C (102.0 F) |
| 2011 | 32.8 C (91.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1961 | -5.0 C (23.0 F) |
| 1962 | -9.4 C (15.1 F) |
| 1963 | -6.1 C (21.0 F) |
| 1964 | -9.4 C (15.1 F) |
| 1965 | -9.4 C (15.1 F) |
| 1966 | -4.4 C (24.1 F) |
| 1967 | 0.0 C (32.0 F) |
| 1968 | -5.0 C (23.0 F) |
| 1969 | -4.4 C (24.1 F) |
| 1970 | -3.3 C (26.1 F) |
| 1971 | -5.0 C (23.0 F) |
| 1972 | -3.3 C (26.1 F) |
| 1973 | -5.0 C (23.0 F) |
| 1974 | -3.3 C (26.1 F) |
| 1975 | -5.0 C (23.0 F) |
| 1976 | -7.2 C (19.0 F) |
| 1977 | -12.2 C (10.0 F) |
| 1978 | -8.3 C (17.1 F) |
| 1979 | -7.2 C (19.0 F) |
| 1980 | -5.0 C (23.0 F) |
| 1981 | -4.4 C (24.1 F) |
| 1982 | 0.0 C (32.0 F) |
| 1983 | -9.4 C (15.1 F) |
| 1984 | -8.3 C (17.1 F) |
| 1985 | -6.1 C (21.0 F) |
| 1986 | -2.2 C (28.0 F) |
| 1987 | -4.4 C (24.1 F) |
| 1988 | -4.4 C (24.1 F) |
| 1989 | 0.0 C (32.0 F) |
| 1990 | 0.0 C (32.0 F) |
| 1991 | -3.3 C (26.1 F) |
| 1992 | 0.0 C (32.0 F) |
| 1993 | -1.1 C (30.0 F) |
| 1994 | -1.1 C (30.0 F) |
| 1995 | -1.1 C (30.0 F) |
| 1996 | -1.1 C (30.0 F) |
| 1997 | -9.4 C (15.1 F) |
| 1998 | -3.3 C (26.1 F) |
| 1999 | -5.0 C (23.0 F) |
| 2000 | -2.2 C (28.0 F) |
| 2001 | -3.3 C (26.1 F) |
| 2002 | 0.0 C (32.0 F) |
| 2003 | -10.0 C (14.0 F) |
| 2004 | -9.4 C (15.1 F) |
| 2005 | -9.4 C (15.1 F) |
| 2006 | -9.4 C (15.1 F) |
| 2007 | -4.4 C (24.1 F) |
| 2008 | -8.3 C (17.1 F) |
| 2009 | -5.0 C (23.0 F) |
| 2010 | -8.3 C (17.1 F) |
| 2011 | -11.1 C (12.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1961 | 4.8 mm (0.19 in) |
| 1962 | 59.9 mm (2.4 in) |
| 1963 | 32.8 mm (1.3 in) |
| 1964 | 41.9 mm (1.6 in) |
| 1965 | 19.8 mm (0.8 in) |
| 1966 | 57.9 mm (2.3 in) |
| 1967 | 34.8 mm (1.4 in) |
| 1968 | 96.8 mm (3.8 in) |
| 1969 | 43.9 mm (1.7 in) |
| 1970 | 30.0 mm (1.2 in) |
| 1971 | 16.8 mm (0.7 in) |
| 1972 | 24.9 mm (1.0 in) |
| 1973 | 40.9 mm (1.6 in) |
| 1974 | 32.8 mm (1.3 in) |
| 1975 | 48.8 mm (1.9 in) |
| 1976 | 45.5 mm (1.8 in) |
| 1977 | 47.8 mm (1.9 in) |
| 1978 | 30.0 mm (1.2 in) |
| 1979 | 79.8 mm (3.1 in) |
| 1980 | 62.0 mm (2.4 in) |
| 1981 | 43.2 mm (1.7 in) |
| 1982 | 54.9 mm (2.2 in) |
| 1983 | 39.9 mm (1.6 in) |
| 1984 | 50.8 mm (2.0 in) |
| 1985 | 45.0 mm (1.8 in) |
| 1986 | 33.8 mm (1.3 in) |
| 1987 | 59.9 mm (2.4 in) |
| 1988 | 39.9 mm (1.6 in) |
| 1989 | 19.8 mm (0.8 in) |
| 1990 | 39.9 mm (1.6 in) |
| 1991 | 30.0 mm (1.2 in) |
| 1992 | 79.8 mm (3.1 in) |
| 1993 | 24.9 mm (1.0 in) |
| 1994 | 34.8 mm (1.4 in) |
| 1995 | 24.9 mm (1.0 in) |
| 1996 | 15.0 mm (0.6 in) |
| 1997 | 19.8 mm (0.8 in) |
| 1998 | 19.8 mm (0.8 in) |
| 1999 | 19.8 mm (0.8 in) |
| 2000 | 18.8 mm (0.7 in) |
| 2001 | 31.8 mm (1.3 in) |
| 2002 | 43.9 mm (1.7 in) |
| 2003 | 39.9 mm (1.6 in) |
| 2004 | 38.9 mm (1.5 in) |
| 2005 | 40.9 mm (1.6 in) |
| 2006 | 39.9 mm (1.6 in) |
| 2007 | 39.9 mm (1.6 in) |
| 2008 | 34.8 mm (1.4 in) |
| 2009 | 67.8 mm (2.7 in) |
| 2010 | 66.8 mm (2.6 in) |
| 2011 | 17.8 mm (0.7 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1961 | 4.8 mm (0.19 in) |
| 1962 | 69.3 mm (2.7 in) |
| 1963 | 51.0 mm (2.0 in) |
| 1964 | 88.7 mm (3.5 in) |
| 1965 | 28.7 mm (1.1 in) |
| 1966 | 108.5 mm (4.3 in) |
| 1967 | 71.1 mm (2.8 in) |
| 1968 | 99.6 mm (3.9 in) |
| 1969 | 56.4 mm (2.2 in) |
| 1970 | 30.0 mm (1.2 in) |
| 1971 | 21.6 mm (0.9 in) |
| 1972 | 40.6 mm (1.6 in) |
| 1973 | 90.4 mm (3.6 in) |
| 1974 | 41.7 mm (1.6 in) |
| 1975 | 71.7 mm (2.8 in) |
| 1976 | 98.3 mm (3.9 in) |
| 1977 | 63.5 mm (2.5 in) |
| 1978 | 131.6 mm (5.2 in) |
| 1979 | 127.3 mm (5.0 in) |
| 1980 | 65.8 mm (2.6 in) |
| 1981 | 59.1 mm (2.3 in) |
| 1982 | 54.9 mm (2.2 in) |
| 1983 | 63.2 mm (2.5 in) |
| 1984 | 57.2 mm (2.3 in) |
| 1985 | 77.8 mm (3.1 in) |
| 1986 | 55.4 mm (2.2 in) |
| 1987 | 77.2 mm (3.0 in) |
| 1988 | 45.4 mm (1.8 in) |
| 1989 | 38.9 mm (1.5 in) |
| 1990 | 74.7 mm (2.9 in) |
| 1991 | 71.4 mm (2.8 in) |
| 1992 | 79.8 mm (3.1 in) |
| 1993 | 54.3 mm (2.1 in) |
| 1994 | 40.4 mm (1.6 in) |
| 1995 | 56.1 mm (2.2 in) |
| 1996 | 24.9 mm (1.0 in) |
| 1997 | 62.7 mm (2.5 in) |
| 1998 | 54.4 mm (2.1 in) |
| 1999 | 22.6 mm (0.9 in) |
| 2000 | 35.3 mm (1.4 in) |
| 2001 | 55.9 mm (2.2 in) |
| 2002 | 68.3 mm (2.7 in) |
| 2003 | 51.1 mm (2.0 in) |
| 2004 | 58.7 mm (2.3 in) |
| 2005 | 71.9 mm (2.8 in) |
| 2006 | 68.6 mm (2.7 in) |
| 2007 | 70.9 mm (2.8 in) |
| 2008 | 55.4 mm (2.2 in) |
| 2009 | 67.8 mm (2.7 in) |
| 2010 | 92.7 mm (3.6 in) |
| 2011 | 24.2 mm (1.0 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1961 | 26 days |
| 1962 | 50 days |
| 1963 | 53 days |
| 1964 | 33 days |
| 1965 | 60 days |
| 1966 | 61 days |
| 1967 | 55 days |
| 1968 | 38 days |
| 1969 | 65 days |
| 1970 | 110 days |
| 1971 | 130 days |
| 1972 | 121 days |
| 1973 | 76 days |
| 1974 | 65 days |
| 1975 | 74 days |
| 1976 | 54 days |
| 1977 | 69 days |
| 1978 | 79 days |
| 1979 | 74 days |
| 1980 | 64 days |
| 1981 | 45 days |
| 1982 | 55 days |
| 1983 | 72 days |
| 1984 | 104 days |
| 1985 | 59 days |
| 1986 | 33 days |
| 1987 | 47 days |
| 1988 | 62 days |
| 1989 | 54 days |
| 1990 | 76 days |
| 1991 | 118 days |
| 1992 | 41 days |
| 1993 | 59 days |
| 1994 | 55 days |
| 1995 | 130 days |
| 1996 | 32 days |
| 1997 | 43 days |
| 1998 | 65 days |
| 1999 | 119 days |
| 2000 | 117 days |
| 2001 | 50 days |
| 2002 | 50 days |
| 2003 | 124 days |
| 2004 | 83 days |
| 2005 | 118 days |
| 2006 | 57 days |
| 2007 | 46 days |
| 2008 | 110 days |
| 2009 | 71 days |
| 2010 | 101 days |
| 2011 | 106 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
40 years with a frostAcross 40 years with a frost, the median last spring frost at Santa Rosa falls on 2 April and the median first autumn frost on 1 November, which leaves a median of 215 days between them.
Fitted over all years, the growing season changes by 0.0 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1972 to 2011) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 2 April | n/a | 29 March | n/a | -1.4 days per decade |
| First autumn frost | 1 November | n/a | 2 November | n/a | -1.4 days per decade |
| Growing days | 215 days | n/a | 218 days | n/a | 0.0 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
47 years, 1962 to 2011A day with at least 38.1 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 99.2 mm (3.9 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 38.1 mm (1.5 in) | |
| 5 years | 53.7 mm (2.1 in) | |
| 10 years | 64.4 mm (2.5 in) | |
| 25 years | 78.2 mm (3.1 in) | |
| 50 years | 88.6 mm (3.5 in) | Longer than the 47 years of record |
| 100 years | 99.2 mm (3.9 in) | Longer than the 47 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, 47 years of values from 1962 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: 96.8 mm (3.8 in) in 1968; 79.8 mm (3.1 in) in 1979; 79.8 mm (3.1 in) in 1992.
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).