San Francisco Oxtotilpan Weather Records (MXN00015088)
Record envelope, standing records and threshold days for San Francisco Oxtotilpan (MXN00015088), Mexico, with 49 years of record.
Key Facts for San Francisco Oxtotilpan
- San Francisco Oxtotilpan (MXN00015088) is a weather station in Mexico at 19.15 latitude and -99.90 longitude, 2,605 m (8,546 ft) above sea level.
- The station reports from 1961 to 2009, 49 years of record.
- 1,464 records set at San Francisco Oxtotilpan still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- San Francisco Oxtotilpan tied a daily record low minimum temperature of 0.0 C (32.0 F) on 27 December 2009.
About the Station
- Location: Mexico, 19.15 latitude, -99.90 longitude.
- Elevation: 2,605 m (8,546 ft).
- Period of record: 1961 to 2009, 49 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 | 28.3 C (82.9 F) | -9.4 C (15.1 F) | n/a | n/a |
| Feb | 28.9 C (84.0 F) | -5.0 C (23.0 F) | n/a | n/a |
| Mar | 32.8 C (91.0 F) | -5.0 C (23.0 F) | n/a | n/a |
| Apr | 30.6 C (87.1 F) | -5.0 C (23.0 F) | n/a | n/a |
| May | 28.9 C (84.0 F) | 0.0 C (32.0 F) | n/a | n/a |
| Jun | 28.9 C (84.0 F) | 0.0 C (32.0 F) | n/a | n/a |
| Jul | 27.8 C (82.0 F) | 0.0 C (32.0 F) | n/a | n/a |
| Aug | 27.8 C (82.0 F) | 0.0 C (32.0 F) | n/a | n/a |
| Sep | 26.7 C (80.1 F) | 0.0 C (32.0 F) | n/a | n/a |
| Oct | 30.6 C (87.1 F) | -1.1 C (30.0 F) | n/a | n/a |
| Nov | 30.0 C (86.0 F) | -5.0 C (23.0 F) | n/a | n/a |
| Dec | 30.0 C (86.0 F) | -5.0 C (23.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1961 | 52 |
| 1962 | 117 |
| 1963 | 64 |
| 1964 | 32 |
| 1965 | 33 |
| 1966 | 70 |
| 1967 | 34 |
| 1968 | 40 |
| 1969 | 46 |
| 1970 | 16 |
| 1971 | 33 |
| 1972 | 5 |
| 1973 | 36 |
| 1974 | 32 |
| 1975 | 31 |
| 1976 | 8 |
| 1977 | 20 |
| 1978 | 36 |
| 1979 | 22 |
| 1980 | 35 |
| 1981 | 21 |
| 1982 | 19 |
| 1983 | 47 |
| 1984 | 22 |
| 1985 | 16 |
| 1986 | 7 |
| 1987 | 5 |
| 1988 | 52 |
| 1989 | 22 |
| 1990 | 12 |
| 1991 | 32 |
| 1992 | 37 |
| 1993 | 40 |
| 1994 | 13 |
| 1995 | 31 |
| 1996 | 31 |
| 1997 | 31 |
| 1998 | 52 |
| 1999 | 13 |
| 2000 | 31 |
| 2001 | 69 |
| 2002 | 5 |
| 2003 | 33 |
| 2004 | 20 |
| 2005 | 15 |
| 2006 | 12 |
| 2007 | 8 |
| 2008 | 3 |
| 2009 | 3 |
All-Time Record Progression
3 new records| Date | Kind | Detail |
|---|---|---|
| 1997-01-13 | Record low minimum temperature | Record low minimum temperature -9.4 C (15.1 F) |
| 2001-03-21 | Record high maximum temperature | Record high maximum temperature 32.8 C (91.0 F) |
| 2001-05-02 | Record daily precipitation | Record daily precipitation 93.2 mm (3.7 in) |
Wettest Day of Each Month
May: 93.2 mm (3.7 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 86.4 mm (3.4 in) | 25 January 1980 |
| Feb | 36.3 mm (1.4 in) | 2 February 1968 |
| Mar | 59.2 mm (2.3 in) | 4 March 1988 |
| Apr | 56.9 mm (2.2 in) | 13 April 1962 |
| May | 93.2 mm (3.7 in) | 2 May 2001 |
| Jun | 79.5 mm (3.1 in) | 10 June 2003 |
| Jul | 72.9 mm (2.9 in) | 29 July 2001 |
| Aug | 63.0 mm (2.5 in) | 18 August 1993 |
| Sep | 63.8 mm (2.5 in) | 22 September 1967 |
| Oct | 68.8 mm (2.7 in) | 6 October 1978 |
| Nov | 35.8 mm (1.4 in) | 19 November 1968 |
| Dec | 44.5 mm (1.8 in) | 30 December 1995 |
Period of Record Coverage
1961 to 2009| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1961 | 54 | 15% | No |
| 1962 | 365 | 100% | Yes |
| 1963 | 361 | 99% | Yes |
| 1964 | 344 | 94% | Yes |
| 1965 | 340 | 93% | Yes |
| 1966 | 363 | 99% | Yes |
| 1967 | 297 | 81% | No |
| 1968 | 298 | 81% | No |
| 1969 | 340 | 93% | Yes |
| 1970 | 365 | 100% | Yes |
| 1971 | 255 | 70% | No |
| 1972 | 122 | 33% | No |
| 1973 | 365 | 100% | Yes |
| 1974 | 361 | 99% | Yes |
| 1975 | 361 | 99% | Yes |
| 1976 | 177 | 48% | No |
| 1977 | 365 | 100% | Yes |
| 1978 | 365 | 100% | Yes |
| 1979 | 353 | 97% | Yes |
| 1980 | 358 | 98% | Yes |
| 1981 | 334 | 92% | Yes |
| 1982 | 363 | 99% | Yes |
| 1983 | 363 | 99% | Yes |
| 1984 | 254 | 69% | No |
| 1985 | 293 | 80% | No |
| 1986 | 182 | 50% | No |
| 1987 | 111 | 30% | No |
| 1988 | 363 | 99% | Yes |
| 1989 | 345 | 95% | Yes |
| 1990 | 365 | 100% | Yes |
| 1991 | 363 | 99% | Yes |
| 1992 | 360 | 98% | Yes |
| 1993 | 287 | 79% | No |
| 1994 | 308 | 84% | No |
| 1995 | 348 | 95% | Yes |
| 1996 | 351 | 96% | Yes |
| 1997 | 332 | 91% | Yes |
| 1998 | 359 | 98% | Yes |
| 1999 | 311 | 85% | No |
| 2000 | 286 | 78% | No |
| 2001 | 333 | 91% | Yes |
| 2002 | 143 | 39% | No |
| 2003 | 190 | 52% | No |
| 2004 | 269 | 73% | No |
| 2005 | 318 | 87% | No |
| 2006 | 348 | 95% | Yes |
| 2007 | 166 | 45% | No |
| 2008 | 356 | 97% | Yes |
| 2009 | 343 | 94% | Yes |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 27 December 2009 | San Francisco Oxtotilpan, MX | daily low min (Tie) | 0.0 C (32.0 F) | tie | 40 years | 4 of 100 (Routine) |
| 23 December 2009 | San Francisco Oxtotilpan, MX | daily low max | 15.0 C (59.0 F) | 0.6 C (1.1 F) | 47 years | 20 of 100 (Routine) |
| 22 December 2009 | San Francisco Oxtotilpan, MX | daily low max (Tie) | 15.0 C (59.0 F) | tie | 47 years | 4 of 100 (Routine) |
| 9 December 2009 | San Francisco Oxtotilpan, MX | daily low min (Tie) | 0.0 C (32.0 F) | tie | 43 years | 4 of 100 (Routine) |
| 6 December 2009 | San Francisco Oxtotilpan, MX | daily low min (Tie) | 0.0 C (32.0 F) | tie | 27 years | 3 of 100 (Routine) |
| 27 November 2009 | San Francisco Oxtotilpan, MX | daily low min (Tie) | 0.0 C (32.0 F) | tie | 34 years | 3 of 100 (Routine) |
| 6 November 2009 | San Francisco Oxtotilpan, MX | daily low min (Tie) | 0.0 C (32.0 F) | tie | 27 years | 3 of 100 (Routine) |
| 27 October 2009 | San Francisco Oxtotilpan, MX | daily high min (Tie) | 10.0 C (50.0 F) | tie | 32 years | 3 of 100 (Routine) |
| 26 October 2009 | San Francisco Oxtotilpan, MX | daily high min (Tie) | 10.0 C (50.0 F) | tie | 32 years | 3 of 100 (Routine) |
| 17 October 2009 | San Francisco Oxtotilpan, MX | monthly high min (Tie) | 11.7 C (53.1 F) | tie | 46 years | 6 of 100 (Routine) |
| 17 October 2009 | San Francisco Oxtotilpan, MX | daily high max (Tie) | 23.9 C (75.0 F) | tie | 28 years | 3 of 100 (Routine) |
| 27 August 2009 | San Francisco Oxtotilpan, MX | daily high max (Tie) | 22.8 C (73.0 F) | tie | 31 years | 3 of 100 (Routine) |
| 25 August 2009 | San Francisco Oxtotilpan, MX | daily high max | 23.3 C (73.9 F) | 0.5 C (0.9 F) | 20 years | 12 of 100 (Routine) |
| 21 August 2009 | San Francisco Oxtotilpan, MX | daily high max (Tie) | 22.8 C (73.0 F) | tie | 28 years | 3 of 100 (Routine) |
| 23 July 2009 | San Francisco Oxtotilpan, MX | daily low min (Tie) | 5.0 C (41.0 F) | tie | 47 years | 4 of 100 (Routine) |
| 12 July 2009 | San Francisco Oxtotilpan, MX | daily low min (Tie) | 5.0 C (41.0 F) | tie | 44 years | 4 of 100 (Routine) |
| 8 July 2009 | San Francisco Oxtotilpan, MX | daily high max (Tie) | 22.2 C (72.0 F) | tie | 27 years | 3 of 100 (Routine) |
| 27 June 2009 | San Francisco Oxtotilpan, MX | daily high max (Tie) | 21.7 C (71.1 F) | tie | 32 years | 3 of 100 (Routine) |
| 26 June 2009 | San Francisco Oxtotilpan, MX | daily rain | 42.7 mm (1.7 in) | 5.4 mm (0.21 in) | 32 years | 18 of 100 (Routine) |
| 24 March 2009 | San Francisco Oxtotilpan, MX | daily rain | 16.3 mm (0.6 in) | 7.2 mm (0.28 in) | 0 years | 12 of 100 (Routine) |
Climate Trend
23 complete years, 1962 to 2008| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1962 | 13.3 C | +0.39 C |
| 1963 | 12.9 C | -0.10 C |
| 1964 | 12.4 C | -0.54 C |
| 1965 | 12.2 C | -0.75 C |
| 1966 | 12.9 C | -0.04 C |
| 1970 | 12.8 C | -0.20 C |
| 1973 | 12.8 C | -0.20 C |
| 1974 | 12.4 C | -0.55 C |
| 1975 | 12.3 C | -0.63 C |
| 1977 | 13.4 C | +0.48 C |
| 1978 | 13.4 C | +0.42 C |
| 1979 | 13.4 C | +0.41 C |
| 1980 | 13.5 C | +0.52 C |
| 1982 | 13.4 C | +0.47 C |
| 1983 | 13.3 C | +0.31 C |
| 1988 | 13.0 C | +0.07 C |
| 1989 | 13.1 C | +0.17 C |
| 1990 | 13.4 C | +0.41 C |
| 1991 | 13.1 C | +0.19 C |
| 1992 | 12.9 C | -0.02 C |
| 1995 | 13.2 C | +0.24 C |
| 1998 | 12.3 C | -0.68 C |
| 2008 | 12.5 C | -0.44 C |
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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 2009| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 32.8 C (91.0 F) | 2001 | 26.7 C (80.1 F) | 49 |
| Coldest night (TNn) | -9.4 C (15.1 F) | 1997 | 0.0 C (32.0 F) | 49 |
| Wettest day (Rx1day) | 93.2 mm (3.7 in) | 2001 | 48.8 mm (1.9 in) | 49 |
| Wettest five days (Rx5day) | 221.3 mm (8.7 in) | 1980 | 105.4 mm (4.1 in) | 49 |
| Longest dry spell (CDD) | 134 days | 2002 | 44 days | 49 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1961 | 25.0 C (77.0 F) |
| 1962 | 28.3 C (82.9 F) |
| 1963 | 26.1 C (79.0 F) |
| 1964 | 26.1 C (79.0 F) |
| 1965 | 25.0 C (77.0 F) |
| 1966 | 26.1 C (79.0 F) |
| 1967 | 26.1 C (79.0 F) |
| 1968 | 24.4 C (75.9 F) |
| 1969 | 25.6 C (78.1 F) |
| 1970 | 25.6 C (78.1 F) |
| 1971 | 25.0 C (77.0 F) |
| 1972 | 21.7 C (71.1 F) |
| 1973 | 27.2 C (81.0 F) |
| 1974 | 26.1 C (79.0 F) |
| 1975 | 28.9 C (84.0 F) |
| 1976 | 28.9 C (84.0 F) |
| 1977 | 27.8 C (82.0 F) |
| 1978 | 28.9 C (84.0 F) |
| 1979 | 26.7 C (80.1 F) |
| 1980 | 27.8 C (82.0 F) |
| 1981 | 27.8 C (82.0 F) |
| 1982 | 27.8 C (82.0 F) |
| 1983 | 29.4 C (84.9 F) |
| 1984 | 27.8 C (82.0 F) |
| 1985 | 26.7 C (80.1 F) |
| 1986 | 30.0 C (86.0 F) |
| 1987 | 26.7 C (80.1 F) |
| 1988 | 26.7 C (80.1 F) |
| 1989 | 26.7 C (80.1 F) |
| 1990 | 27.8 C (82.0 F) |
| 1991 | 30.6 C (87.1 F) |
| 1992 | 27.8 C (82.0 F) |
| 1993 | 27.8 C (82.0 F) |
| 1994 | 27.8 C (82.0 F) |
| 1995 | 28.9 C (84.0 F) |
| 1996 | 26.7 C (80.1 F) |
| 1997 | 25.0 C (77.0 F) |
| 1998 | 26.7 C (80.1 F) |
| 1999 | 30.0 C (86.0 F) |
| 2000 | 30.6 C (87.1 F) |
| 2001 | 32.8 C (91.0 F) |
| 2002 | 25.6 C (78.1 F) |
| 2003 | 30.6 C (87.1 F) |
| 2004 | 30.0 C (86.0 F) |
| 2005 | 25.6 C (78.1 F) |
| 2006 | 26.7 C (80.1 F) |
| 2007 | 26.7 C (80.1 F) |
| 2008 | 26.1 C (79.0 F) |
| 2009 | 25.0 C (77.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1961 | 2.8 C (37.0 F) |
| 1962 | 0.0 C (32.0 F) |
| 1963 | -5.0 C (23.0 F) |
| 1964 | 0.0 C (32.0 F) |
| 1965 | -2.8 C (27.0 F) |
| 1966 | 0.0 C (32.0 F) |
| 1967 | 0.0 C (32.0 F) |
| 1968 | 0.0 C (32.0 F) |
| 1969 | 0.0 C (32.0 F) |
| 1970 | 0.0 C (32.0 F) |
| 1971 | 0.6 C (33.1 F) |
| 1972 | -2.8 C (27.0 F) |
| 1973 | -3.9 C (25.0 F) |
| 1974 | 0.0 C (32.0 F) |
| 1975 | -5.0 C (23.0 F) |
| 1976 | -5.0 C (23.0 F) |
| 1977 | 0.0 C (32.0 F) |
| 1978 | -2.2 C (28.0 F) |
| 1979 | 0.0 C (32.0 F) |
| 1980 | 0.0 C (32.0 F) |
| 1981 | -1.1 C (30.0 F) |
| 1982 | -3.3 C (26.1 F) |
| 1983 | -5.0 C (23.0 F) |
| 1984 | 0.0 C (32.0 F) |
| 1985 | 0.0 C (32.0 F) |
| 1986 | 0.0 C (32.0 F) |
| 1987 | 0.0 C (32.0 F) |
| 1988 | -7.2 C (19.0 F) |
| 1989 | 0.0 C (32.0 F) |
| 1990 | -2.2 C (28.0 F) |
| 1991 | -0.6 C (30.9 F) |
| 1992 | -4.4 C (24.1 F) |
| 1993 | -5.0 C (23.0 F) |
| 1994 | -3.3 C (26.1 F) |
| 1995 | -5.0 C (23.0 F) |
| 1996 | -5.0 C (23.0 F) |
| 1997 | -9.4 C (15.1 F) |
| 1998 | -0.6 C (30.9 F) |
| 1999 | -1.1 C (30.0 F) |
| 2000 | 0.0 C (32.0 F) |
| 2001 | 0.0 C (32.0 F) |
| 2002 | 0.0 C (32.0 F) |
| 2003 | 0.0 C (32.0 F) |
| 2004 | 0.0 C (32.0 F) |
| 2005 | 0.0 C (32.0 F) |
| 2006 | 0.0 C (32.0 F) |
| 2007 | 0.0 C (32.0 F) |
| 2008 | 0.0 C (32.0 F) |
| 2009 | 0.0 C (32.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1961 | 25.9 mm (1.0 in) |
| 1962 | 56.9 mm (2.2 in) |
| 1963 | 29.5 mm (1.2 in) |
| 1964 | 47.8 mm (1.9 in) |
| 1965 | 54.9 mm (2.2 in) |
| 1966 | 37.8 mm (1.5 in) |
| 1967 | 70.9 mm (2.8 in) |
| 1968 | 47.0 mm (1.9 in) |
| 1969 | 40.9 mm (1.6 in) |
| 1970 | 41.4 mm (1.6 in) |
| 1971 | 42.9 mm (1.7 in) |
| 1972 | 19.3 mm (0.8 in) |
| 1973 | 49.8 mm (2.0 in) |
| 1974 | 34.8 mm (1.4 in) |
| 1975 | 39.9 mm (1.6 in) |
| 1976 | 48.8 mm (1.9 in) |
| 1977 | 24.4 mm (1.0 in) |
| 1978 | 68.8 mm (2.7 in) |
| 1979 | 48.8 mm (1.9 in) |
| 1980 | 86.4 mm (3.4 in) |
| 1981 | 47.0 mm (1.9 in) |
| 1982 | 34.5 mm (1.4 in) |
| 1983 | 65.3 mm (2.6 in) |
| 1984 | 53.3 mm (2.1 in) |
| 1985 | 53.6 mm (2.1 in) |
| 1986 | 51.6 mm (2.0 in) |
| 1987 | 18.8 mm (0.7 in) |
| 1988 | 59.2 mm (2.3 in) |
| 1989 | 40.9 mm (1.6 in) |
| 1990 | 58.4 mm (2.3 in) |
| 1991 | 65.8 mm (2.6 in) |
| 1992 | 83.3 mm (3.3 in) |
| 1993 | 63.0 mm (2.5 in) |
| 1994 | 51.3 mm (2.0 in) |
| 1995 | 57.7 mm (2.3 in) |
| 1996 | 42.4 mm (1.7 in) |
| 1997 | 45.5 mm (1.8 in) |
| 1998 | 58.7 mm (2.3 in) |
| 1999 | 30.7 mm (1.2 in) |
| 2000 | 38.9 mm (1.5 in) |
| 2001 | 93.2 mm (3.7 in) |
| 2002 | 28.4 mm (1.1 in) |
| 2003 | 79.5 mm (3.1 in) |
| 2004 | 45.0 mm (1.8 in) |
| 2005 | 54.9 mm (2.2 in) |
| 2006 | 62.0 mm (2.4 in) |
| 2007 | 65.5 mm (2.6 in) |
| 2008 | 37.3 mm (1.5 in) |
| 2009 | 42.7 mm (1.7 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1961 | 32.8 mm (1.3 in) |
| 1962 | 87.6 mm (3.4 in) |
| 1963 | 102.1 mm (4.0 in) |
| 1964 | 87.9 mm (3.5 in) |
| 1965 | 102.4 mm (4.0 in) |
| 1966 | 90.8 mm (3.6 in) |
| 1967 | 91.3 mm (3.6 in) |
| 1968 | 129.3 mm (5.1 in) |
| 1969 | 123.7 mm (4.9 in) |
| 1970 | 105.4 mm (4.1 in) |
| 1971 | 94.5 mm (3.7 in) |
| 1972 | 54.4 mm (2.1 in) |
| 1973 | 109.9 mm (4.3 in) |
| 1974 | 109.5 mm (4.3 in) |
| 1975 | 84.4 mm (3.3 in) |
| 1976 | 103.2 mm (4.1 in) |
| 1977 | 68.9 mm (2.7 in) |
| 1978 | 122.7 mm (4.8 in) |
| 1979 | 101.4 mm (4.0 in) |
| 1980 | 221.3 mm (8.7 in) |
| 1981 | 132.6 mm (5.2 in) |
| 1982 | 101.8 mm (4.0 in) |
| 1983 | 128.9 mm (5.1 in) |
| 1984 | 110.4 mm (4.3 in) |
| 1985 | 114.4 mm (4.5 in) |
| 1986 | 123.5 mm (4.9 in) |
| 1987 | 60.5 mm (2.4 in) |
| 1988 | 87.0 mm (3.4 in) |
| 1989 | 77.0 mm (3.0 in) |
| 1990 | 95.3 mm (3.8 in) |
| 1991 | 154.9 mm (6.1 in) |
| 1992 | 147.9 mm (5.8 in) |
| 1993 | 103.6 mm (4.1 in) |
| 1994 | 88.6 mm (3.5 in) |
| 1995 | 113.6 mm (4.5 in) |
| 1996 | 83.7 mm (3.3 in) |
| 1997 | 103.8 mm (4.1 in) |
| 1998 | 111.2 mm (4.4 in) |
| 1999 | 95.5 mm (3.8 in) |
| 2000 | 109.1 mm (4.3 in) |
| 2001 | 121.6 mm (4.8 in) |
| 2002 | 95.2 mm (3.7 in) |
| 2003 | 209.4 mm (8.2 in) |
| 2004 | 106.7 mm (4.2 in) |
| 2005 | 160.4 mm (6.3 in) |
| 2006 | 217.2 mm (8.6 in) |
| 2007 | 144.0 mm (5.7 in) |
| 2008 | 137.2 mm (5.4 in) |
| 2009 | 106.1 mm (4.2 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1961 | 21 days |
| 1962 | 78 days |
| 1963 | 78 days |
| 1964 | 42 days |
| 1965 | 39 days |
| 1966 | 26 days |
| 1967 | 39 days |
| 1968 | 25 days |
| 1969 | 53 days |
| 1970 | 62 days |
| 1971 | 74 days |
| 1972 | 15 days |
| 1973 | 83 days |
| 1974 | 26 days |
| 1975 | 93 days |
| 1976 | 42 days |
| 1977 | 43 days |
| 1978 | 27 days |
| 1979 | 39 days |
| 1980 | 35 days |
| 1981 | 35 days |
| 1982 | 43 days |
| 1983 | 84 days |
| 1984 | 64 days |
| 1985 | 24 days |
| 1986 | 61 days |
| 1987 | 33 days |
| 1988 | 62 days |
| 1989 | 63 days |
| 1990 | 70 days |
| 1991 | 38 days |
| 1992 | 65 days |
| 1993 | 61 days |
| 1994 | 34 days |
| 1995 | 32 days |
| 1996 | 53 days |
| 1997 | 44 days |
| 1998 | 128 days |
| 1999 | 47 days |
| 2000 | 44 days |
| 2001 | 29 days |
| 2002 | 134 days |
| 2003 | 61 days |
| 2004 | 56 days |
| 2005 | 116 days |
| 2006 | 91 days |
| 2007 | 44 days |
| 2008 | 57 days |
| 2009 | 26 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
20 years with a frostAcross 20 years with a frost, the median last spring frost at San Francisco Oxtotilpan falls on 7 March and the median first autumn frost on 16 November, which leaves a median of 244 days between them.
| Measure | Median, all years | Earliest period | Recent period (1963 to 2008) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 7 March | n/a | 7 March | n/a | n/a |
| First autumn frost | 16 November | n/a | 16 November | n/a | n/a |
| Growing days | 244 days | n/a | 244 days | n/a | n/a |
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
32 years, 1962 to 2009A day with at least 49.3 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 102.6 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 | 49.3 mm (1.9 in) | |
| 5 years | 63.8 mm (2.5 in) | |
| 10 years | 73.3 mm (2.9 in) | |
| 25 years | 85.2 mm (3.4 in) | |
| 50 years | 94.0 mm (3.7 in) | Longer than the 32 years of record |
| 100 years | 102.6 mm (4.0 in) | Longer than the 32 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, 32 years of values from 1962 to 2009.
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: 93.2 mm (3.7 in) in 2001; 86.4 mm (3.4 in) in 1980; 83.3 mm (3.3 in) in 1992.
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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).