San Gregorio Weather Records (MXN00014125)
Record envelope, standing records and threshold days for San Gregorio (MXN00014125), Mexico, with 69 years of record.
Key Facts for San Gregorio
- San Gregorio (MXN00014125) is a weather station in Mexico at 20.62 latitude and -104.57 longitude, 1,640 m (5,380 ft) above sea level.
- The station reports from 1944 to 2012, 69 years of record.
- 1,464 records set at San Gregorio still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- San Gregorio tied a daily record low minimum temperature of -3.3 C (26.1 F) on 28 January 2012.
About the Station
- Location: Mexico, 20.62 latitude, -104.57 longitude.
- Elevation: 1,640 m (5,380 ft).
- Period of record: 1944 to 2012, 69 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 | 29.4 C (84.9 F) | -9.4 C (15.1 F) | n/a | n/a |
| Feb | 30.0 C (86.0 F) | -9.4 C (15.1 F) | n/a | n/a |
| Mar | 31.7 C (89.1 F) | -8.9 C (16.0 F) | n/a | n/a |
| Apr | 32.8 C (91.0 F) | -8.3 C (17.1 F) | n/a | n/a |
| May | 35.0 C (95.0 F) | -4.4 C (24.1 F) | n/a | n/a |
| Jun | 38.9 C (102.0 F) | 1.7 C (35.1 F) | n/a | n/a |
| Jul | 30.0 C (86.0 F) | 6.1 C (43.0 F) | n/a | n/a |
| Aug | 29.4 C (84.9 F) | 2.8 C (37.0 F) | n/a | n/a |
| Sep | 30.0 C (86.0 F) | 1.1 C (34.0 F) | n/a | n/a |
| Oct | 33.9 C (93.0 F) | -0.6 C (30.9 F) | n/a | n/a |
| Nov | 33.3 C (91.9 F) | -7.2 C (19.0 F) | n/a | n/a |
| Dec | 27.8 C (82.0 F) | -8.9 C (16.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1944 | 22 |
| 1945 | 43 |
| 1946 | 143 |
| 1947 | 41 |
| 1948 | 50 |
| 1949 | 30 |
| 1950 | 23 |
| 1951 | 46 |
| 1952 | 57 |
| 1953 | 29 |
| 1954 | 23 |
| 1955 | 29 |
| 1956 | 37 |
| 1957 | 54 |
| 1958 | 17 |
| 1959 | 26 |
| 1960 | 44 |
| 1961 | 23 |
| 1962 | 15 |
| 1963 | 15 |
| 1964 | 19 |
| 1965 | 17 |
| 1966 | 16 |
| 1967 | 20 |
| 1968 | 27 |
| 1969 | 2 |
| 1970 | 13 |
| 1971 | 23 |
| 1972 | 21 |
| 1973 | 16 |
| 1974 | 12 |
| 1975 | 13 |
| 1976 | 19 |
| 1977 | 12 |
| 1978 | 4 |
| 1979 | 43 |
| 1980 | 27 |
| 1981 | 11 |
| 1982 | 23 |
| 1983 | 27 |
| 1984 | 11 |
| 1985 | 8 |
| 1986 | 18 |
| 1987 | 17 |
| 1988 | 28 |
| 1989 | 14 |
| 1990 | 4 |
| 1991 | 23 |
| 1992 | 20 |
| 1993 | 9 |
| 1994 | 5 |
| 1995 | 5 |
| 1996 | 1 |
| 1997 | 10 |
| 1998 | 22 |
| 1999 | 8 |
| 2000 | 2 |
| 2001 | 1 |
| 2002 | 9 |
| 2003 | 10 |
| 2004 | 11 |
| 2005 | 16 |
| 2006 | 17 |
| 2007 | 8 |
| 2008 | 11 |
| 2009 | 14 |
| 2010 | 29 |
| 2012 | 1 |
All-Time Record Progression
3 new records| Date | Kind | Detail |
|---|---|---|
| 1981-07-21 | Record daily precipitation | Record daily precipitation 100.6 mm (4.0 in) |
| 1983-05-26 | Record daily precipitation | Record daily precipitation 123.4 mm (4.9 in) |
| 2010-08-29 | Record daily precipitation | Record daily precipitation 128.3 mm (5.1 in) |
Wettest Day of Each Month
Aug: 128.3 mm (5.1 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 94.5 mm (3.7 in) | 25 January 1992 |
| Feb | 68.3 mm (2.7 in) | 3 February 2010 |
| Mar | 63.0 mm (2.5 in) | 3 March 1968 |
| Apr | 37.8 mm (1.5 in) | 13 April 1973 |
| May | 123.4 mm (4.9 in) | 26 May 1983 |
| Jun | 87.4 mm (3.4 in) | 7 June 1972 |
| Jul | 100.6 mm (4.0 in) | 21 July 1981 |
| Aug | 128.3 mm (5.1 in) | 29 August 2010 |
| Sep | 69.9 mm (2.8 in) | 10 September 1957 |
| Oct | 91.9 mm (3.6 in) | 16 October 1955 |
| Nov | 95.0 mm (3.7 in) | 26 November 1982 |
| Dec | 46.5 mm (1.8 in) | 15 December 1963 |
Period of Record Coverage
1944 to 2012| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1944 | 163 | 45% | No |
| 1945 | 329 | 90% | Yes |
| 1946 | 336 | 92% | Yes |
| 1947 | 241 | 66% | No |
| 1948 | 329 | 90% | No |
| 1949 | 330 | 90% | Yes |
| 1950 | 350 | 96% | Yes |
| 1951 | 327 | 90% | No |
| 1952 | 357 | 98% | Yes |
| 1953 | 361 | 99% | Yes |
| 1954 | 358 | 98% | Yes |
| 1955 | 362 | 99% | Yes |
| 1956 | 359 | 98% | Yes |
| 1957 | 353 | 97% | Yes |
| 1958 | 360 | 99% | Yes |
| 1959 | 360 | 99% | Yes |
| 1960 | 361 | 99% | Yes |
| 1961 | 357 | 98% | Yes |
| 1962 | 362 | 99% | Yes |
| 1963 | 354 | 97% | Yes |
| 1964 | 358 | 98% | Yes |
| 1965 | 302 | 83% | No |
| 1966 | 358 | 98% | Yes |
| 1967 | 355 | 97% | Yes |
| 1968 | 358 | 98% | Yes |
| 1969 | 59 | 16% | No |
| 1970 | 350 | 96% | Yes |
| 1971 | 357 | 98% | Yes |
| 1972 | 358 | 98% | Yes |
| 1973 | 349 | 96% | Yes |
| 1974 | 358 | 98% | Yes |
| 1975 | 349 | 96% | Yes |
| 1976 | 363 | 99% | Yes |
| 1977 | 355 | 97% | Yes |
| 1978 | 357 | 98% | Yes |
| 1979 | 355 | 97% | Yes |
| 1980 | 358 | 98% | Yes |
| 1981 | 356 | 98% | Yes |
| 1982 | 355 | 97% | Yes |
| 1983 | 358 | 98% | Yes |
| 1984 | 349 | 95% | Yes |
| 1985 | 357 | 98% | Yes |
| 1986 | 322 | 88% | No |
| 1987 | 352 | 96% | Yes |
| 1988 | 364 | 99% | Yes |
| 1989 | 330 | 90% | Yes |
| 1990 | 90 | 25% | No |
| 1991 | 365 | 100% | Yes |
| 1992 | 334 | 91% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 360 | 99% | Yes |
| 1995 | 358 | 98% | Yes |
| 1996 | 320 | 87% | No |
| 1997 | 329 | 90% | Yes |
| 1998 | 344 | 94% | Yes |
| 1999 | 348 | 95% | Yes |
| 2000 | 366 | 100% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 365 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 331 | 90% | Yes |
| 2005 | 365 | 100% | Yes |
| 2006 | 365 | 100% | Yes |
| 2007 | 332 | 91% | Yes |
| 2008 | 335 | 92% | Yes |
| 2009 | 365 | 100% | Yes |
| 2010 | 363 | 99% | Yes |
| 2012 | 31 | 8% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 28 January 2012 | San Gregorio, MX | daily low min (Tie) | -3.3 C (26.1 F) | tie | 38 years | 4 of 100 (Routine) |
| 21 January 2012 | San Gregorio, MX | daily high max (Tie) | 25.0 C (77.0 F) | tie | 24 years | 3 of 100 (Routine) |
| 18 January 2012 | San Gregorio, MX | daily high max | 25.6 C (78.1 F) | 0.6 C (1.1 F) | 29 years | 16 of 100 (Routine) |
| 17 January 2012 | San Gregorio, MX | daily high max (Tie) | 25.0 C (77.0 F) | tie | 52 years | 5 of 100 (Routine) |
| 16 January 2012 | San Gregorio, MX | daily high max (Tie) | 25.0 C (77.0 F) | tie | 54 years | 5 of 100 (Routine) |
| 1 January 2012 | San Gregorio, MX | daily high max (Tie) | 25.0 C (77.0 F) | tie | 54 years | 5 of 100 (Routine) |
| 21 December 2010 | San Gregorio, MX | daily high max (Tie) | 25.0 C (77.0 F) | tie | 65 years | 6 of 100 (Routine) |
| 19 December 2010 | San Gregorio, MX | daily low min | -4.4 C (24.1 F) | 1.1 C (2.0 F) | 51 years | 24 of 100 (Routine) |
| 18 December 2010 | San Gregorio, MX | daily low min | -6.1 C (21.0 F) | 2.2 C (4.0 F) | 51 years | 28 of 100 (Routine) |
| 17 December 2010 | San Gregorio, MX | daily low min (Tie) | -5.0 C (23.0 F) | tie | 32 years | 3 of 100 (Routine) |
| 14 December 2010 | San Gregorio, MX | daily low min | -4.4 C (24.1 F) | 0.5 C (0.9 F) | 53 years | 23 of 100 (Routine) |
| 13 December 2010 | San Gregorio, MX | daily low min | -5.0 C (23.0 F) | 0.6 C (1.1 F) | 56 years | 24 of 100 (Routine) |
| 10 December 2010 | San Gregorio, MX | daily low min | -7.2 C (19.0 F) | 2.8 C (5.0 F) | 52 years | 30 of 100 (Routine) |
| 6 December 2010 | San Gregorio, MX | daily low min (Tie) | -3.3 C (26.1 F) | tie | 64 years | 6 of 100 (Routine) |
| 4 December 2010 | San Gregorio, MX | daily low min | -3.3 C (26.1 F) | 0.5 C (0.9 F) | 28 years | 15 of 100 (Routine) |
| 30 November 2010 | San Gregorio, MX | daily low min (Tie) | -2.2 C (28.0 F) | tie | 44 years | 4 of 100 (Routine) |
| 23 November 2010 | San Gregorio, MX | daily high max (Tie) | 25.6 C (78.1 F) | tie | 28 years | 3 of 100 (Routine) |
| 22 November 2010 | San Gregorio, MX | daily high max | 26.7 C (80.1 F) | 1.1 C (2.0 F) | 24 years | 18 of 100 (Routine) |
| 17 November 2010 | San Gregorio, MX | daily low min | -3.3 C (26.1 F) | 0.5 C (0.9 F) | 40 years | 19 of 100 (Routine) |
| 10 November 2010 | San Gregorio, MX | daily low min | -1.1 C (30.0 F) | 1.1 C (2.0 F) | 31 years | 18 of 100 (Routine) |
Climate Trend
49 complete years, 1945 to 2010| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1945 | 15.6 C | +0.40 C |
| 1948 | 16.1 C | +0.98 C |
| 1949 | 15.0 C | -0.19 C |
| 1950 | 14.8 C | -0.35 C |
| 1952 | 14.8 C | -0.38 C |
| 1953 | 14.9 C | -0.30 C |
| 1954 | 15.0 C | -0.19 C |
| 1955 | 14.6 C | -0.60 C |
| 1956 | 14.6 C | -0.52 C |
| 1957 | 15.2 C | +0.09 C |
| 1958 | 15.3 C | +0.12 C |
| 1959 | 15.3 C | +0.12 C |
| 1960 | 15.1 C | -0.09 C |
| 1961 | 14.8 C | -0.31 C |
| 1962 | 15.0 C | -0.20 C |
| 1963 | 15.0 C | -0.16 C |
| 1964 | 14.7 C | -0.42 C |
| 1966 | 14.8 C | -0.40 C |
| 1967 | 14.5 C | -0.61 C |
| 1968 | 14.7 C | -0.45 C |
| 1970 | 14.8 C | -0.40 C |
| 1971 | 14.5 C | -0.67 C |
| 1972 | 15.3 C | +0.10 C |
| 1973 | 15.0 C | -0.17 C |
| 1974 | 14.6 C | -0.58 C |
| 1975 | 14.6 C | -0.60 C |
| 1976 | 14.9 C | -0.28 C |
| 1977 | 15.1 C | -0.03 C |
| 1978 | 15.2 C | +0.07 C |
| 1979 | 14.8 C | -0.35 C |
| 1980 | 15.4 C | +0.25 C |
| 1981 | 15.4 C | +0.24 C |
| 1982 | 15.5 C | +0.38 C |
| 1983 | 14.9 C | -0.22 C |
| 1984 | 15.2 C | +0.06 C |
| 1985 | 15.2 C | +0.05 C |
| 1987 | 15.4 C | +0.22 C |
| 1988 | 15.5 C | +0.30 C |
| 1994 | 15.7 C | +0.53 C |
| 1995 | 15.7 C | +0.55 C |
| 1999 | 15.4 C | +0.22 C |
| 2000 | 15.8 C | +0.68 C |
| 2001 | 15.6 C | +0.48 C |
| 2002 | 15.9 C | +0.77 C |
| 2003 | 15.8 C | +0.61 C |
| 2005 | 15.7 C | +0.50 C |
| 2006 | 15.7 C | +0.57 C |
| 2009 | 15.5 C | +0.38 C |
| 2010 | 14.9 C | -0.30 C |
The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1945 to 2010. In Fahrenheit: 0.2 F (0.1 to 0.3) per decade. The slope is a straight line fitted to 49 complete years; the brackets give its 95 percent interval.
| Measure | Per decade (C) | Per decade (F) | Period | Complete years | Reading |
|---|---|---|---|---|---|
| Annual mean temperature | 0.1 C (0.1 to 0.2) per decade | 0.2 F (0.1 to 0.3) per decade | 1945 to 2010 | 49 | Rise |
| Mean daily maximum | 0.3 C (0.2 to 0.4) per decade | 0.6 F (0.4 to 0.8) per decade | 1945 to 2010 | 49 | Rise |
| Mean daily minimum | -0.11 C (-0.21 to -0.01) per decade | -0.19 F (-0.37 to -0.01) per decade | 1945 to 2010 | 49 | 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
1944 to 2012| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 38.9 C (102.0 F) | 1946 | 30.6 C (87.1 F) | 68 |
| Coldest night (TNn) | -9.4 C (15.1 F) | 1955 | -5.0 C (23.0 F) | 68 |
| Wettest day (Rx1day) | 128.3 mm (5.1 in) | 2010 | 57.6 mm (2.3 in) | 68 |
| Wettest five days (Rx5day) | 212.8 mm (8.4 in) | 1987 | 115.8 mm (4.6 in) | 68 |
| Longest dry spell (CDD) | 142 days | 2000 | 70 days | 68 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1944 | 30.6 C (87.1 F) |
| 1945 | 32.8 C (91.0 F) |
| 1946 | 38.9 C (102.0 F) |
| 1947 | 29.4 C (84.9 F) |
| 1948 | 31.7 C (89.1 F) |
| 1949 | 29.4 C (84.9 F) |
| 1950 | 35.0 C (95.0 F) |
| 1951 | 30.0 C (86.0 F) |
| 1952 | 30.0 C (86.0 F) |
| 1953 | 30.0 C (86.0 F) |
| 1954 | 28.9 C (84.0 F) |
| 1955 | 28.9 C (84.0 F) |
| 1956 | 28.9 C (84.0 F) |
| 1957 | 31.7 C (89.1 F) |
| 1958 | 31.7 C (89.1 F) |
| 1959 | 30.0 C (86.0 F) |
| 1960 | 31.7 C (89.1 F) |
| 1961 | 31.1 C (88.0 F) |
| 1962 | 30.0 C (86.0 F) |
| 1963 | 30.6 C (87.1 F) |
| 1964 | 30.6 C (87.1 F) |
| 1965 | 30.6 C (87.1 F) |
| 1966 | 30.0 C (86.0 F) |
| 1967 | 30.0 C (86.0 F) |
| 1968 | 30.0 C (86.0 F) |
| 1969 | 26.1 C (79.0 F) |
| 1970 | 30.0 C (86.0 F) |
| 1971 | 30.0 C (86.0 F) |
| 1972 | 30.6 C (87.1 F) |
| 1973 | 30.6 C (87.1 F) |
| 1974 | 30.6 C (87.1 F) |
| 1975 | 30.0 C (86.0 F) |
| 1976 | 30.6 C (87.1 F) |
| 1977 | 30.0 C (86.0 F) |
| 1978 | 30.6 C (87.1 F) |
| 1979 | 30.0 C (86.0 F) |
| 1980 | 30.6 C (87.1 F) |
| 1981 | 30.6 C (87.1 F) |
| 1982 | 32.2 C (90.0 F) |
| 1983 | 33.3 C (91.9 F) |
| 1984 | 30.0 C (86.0 F) |
| 1985 | 30.6 C (87.1 F) |
| 1986 | 31.7 C (89.1 F) |
| 1987 | 30.6 C (87.1 F) |
| 1988 | 30.6 C (87.1 F) |
| 1989 | 30.6 C (87.1 F) |
| 1990 | 25.6 C (78.1 F) |
| 1991 | 31.7 C (89.1 F) |
| 1992 | 30.6 C (87.1 F) |
| 1993 | 30.0 C (86.0 F) |
| 1994 | 30.6 C (87.1 F) |
| 1995 | 31.7 C (89.1 F) |
| 1996 | 30.6 C (87.1 F) |
| 1997 | 30.0 C (86.0 F) |
| 1998 | 32.8 C (91.0 F) |
| 1999 | 31.7 C (89.1 F) |
| 2000 | 30.6 C (87.1 F) |
| 2001 | 30.0 C (86.0 F) |
| 2002 | 31.7 C (89.1 F) |
| 2003 | 32.8 C (91.0 F) |
| 2004 | 33.9 C (93.0 F) |
| 2005 | 32.8 C (91.0 F) |
| 2006 | 30.6 C (87.1 F) |
| 2007 | 30.0 C (86.0 F) |
| 2008 | 31.7 C (89.1 F) |
| 2009 | 30.0 C (86.0 F) |
| 2010 | 30.6 C (87.1 F) |
| 2012 | 25.6 C (78.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1944 | -4.4 C (24.1 F) |
| 1945 | -5.0 C (23.0 F) |
| 1946 | -4.4 C (24.1 F) |
| 1947 | -8.3 C (17.1 F) |
| 1948 | -2.2 C (28.0 F) |
| 1949 | -2.8 C (27.0 F) |
| 1950 | -5.0 C (23.0 F) |
| 1951 | -5.0 C (23.0 F) |
| 1952 | -5.0 C (23.0 F) |
| 1953 | -6.1 C (21.0 F) |
| 1954 | -2.8 C (27.0 F) |
| 1955 | -9.4 C (15.1 F) |
| 1956 | -6.1 C (21.0 F) |
| 1957 | -8.9 C (16.0 F) |
| 1958 | -6.1 C (21.0 F) |
| 1959 | -6.1 C (21.0 F) |
| 1960 | -9.4 C (15.1 F) |
| 1961 | -8.9 C (16.0 F) |
| 1962 | -6.7 C (19.9 F) |
| 1963 | -6.1 C (21.0 F) |
| 1964 | -5.0 C (23.0 F) |
| 1965 | -4.4 C (24.1 F) |
| 1966 | -5.0 C (23.0 F) |
| 1967 | -8.9 C (16.0 F) |
| 1968 | -5.0 C (23.0 F) |
| 1969 | -2.2 C (28.0 F) |
| 1970 | -7.2 C (19.0 F) |
| 1971 | -8.3 C (17.1 F) |
| 1972 | -5.6 C (21.9 F) |
| 1973 | -7.2 C (19.0 F) |
| 1974 | -3.3 C (26.1 F) |
| 1975 | -8.9 C (16.0 F) |
| 1976 | -5.0 C (23.0 F) |
| 1977 | -5.0 C (23.0 F) |
| 1978 | -6.7 C (19.9 F) |
| 1979 | -7.2 C (19.0 F) |
| 1980 | -5.6 C (21.9 F) |
| 1981 | -5.0 C (23.0 F) |
| 1982 | -5.0 C (23.0 F) |
| 1983 | -7.2 C (19.0 F) |
| 1984 | -3.9 C (25.0 F) |
| 1985 | -3.3 C (26.1 F) |
| 1986 | -5.0 C (23.0 F) |
| 1987 | -3.3 C (26.1 F) |
| 1988 | 0.0 C (32.0 F) |
| 1989 | 0.0 C (32.0 F) |
| 1990 | 0.0 C (32.0 F) |
| 1991 | 0.0 C (32.0 F) |
| 1992 | 0.0 C (32.0 F) |
| 1993 | 0.0 C (32.0 F) |
| 1994 | 0.6 C (33.1 F) |
| 1995 | -3.3 C (26.1 F) |
| 1996 | 0.0 C (32.0 F) |
| 1997 | 0.0 C (32.0 F) |
| 1998 | -7.2 C (19.0 F) |
| 1999 | -6.1 C (21.0 F) |
| 2000 | -0.6 C (30.9 F) |
| 2001 | 0.0 C (32.0 F) |
| 2002 | 0.0 C (32.0 F) |
| 2003 | 0.0 C (32.0 F) |
| 2004 | -5.0 C (23.0 F) |
| 2005 | 0.0 C (32.0 F) |
| 2006 | -8.3 C (17.1 F) |
| 2007 | -4.4 C (24.1 F) |
| 2008 | -6.1 C (21.0 F) |
| 2009 | -5.0 C (23.0 F) |
| 2010 | -7.2 C (19.0 F) |
| 2012 | -3.3 C (26.1 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1944 | 58.2 mm (2.3 in) |
| 1945 | 74.4 mm (2.9 in) |
| 1946 | 44.2 mm (1.7 in) |
| 1947 | 62.5 mm (2.5 in) |
| 1948 | 47.8 mm (1.9 in) |
| 1949 | 46.0 mm (1.8 in) |
| 1950 | 55.4 mm (2.2 in) |
| 1951 | 70.9 mm (2.8 in) |
| 1952 | 52.8 mm (2.1 in) |
| 1953 | 74.9 mm (2.9 in) |
| 1954 | 45.5 mm (1.8 in) |
| 1955 | 91.9 mm (3.6 in) |
| 1956 | 52.8 mm (2.1 in) |
| 1957 | 69.9 mm (2.8 in) |
| 1958 | 57.9 mm (2.3 in) |
| 1959 | 89.4 mm (3.5 in) |
| 1960 | 51.8 mm (2.0 in) |
| 1961 | 50.3 mm (2.0 in) |
| 1962 | 52.3 mm (2.1 in) |
| 1963 | 58.9 mm (2.3 in) |
| 1964 | 59.9 mm (2.4 in) |
| 1965 | 49.8 mm (2.0 in) |
| 1966 | 47.8 mm (1.9 in) |
| 1967 | 66.8 mm (2.6 in) |
| 1968 | 63.8 mm (2.5 in) |
| 1969 | 0.8 mm (0.03 in) |
| 1970 | 59.9 mm (2.4 in) |
| 1971 | 43.9 mm (1.7 in) |
| 1972 | 87.4 mm (3.4 in) |
| 1973 | 37.8 mm (1.5 in) |
| 1974 | 54.9 mm (2.2 in) |
| 1975 | 34.8 mm (1.4 in) |
| 1976 | 69.9 mm (2.8 in) |
| 1977 | 42.4 mm (1.7 in) |
| 1978 | 30.0 mm (1.2 in) |
| 1979 | 32.8 mm (1.3 in) |
| 1980 | 73.9 mm (2.9 in) |
| 1981 | 100.6 mm (4.0 in) |
| 1982 | 95.0 mm (3.7 in) |
| 1983 | 123.4 mm (4.9 in) |
| 1984 | 57.2 mm (2.3 in) |
| 1985 | 59.2 mm (2.3 in) |
| 1986 | 50.5 mm (2.0 in) |
| 1987 | 83.6 mm (3.3 in) |
| 1988 | 46.0 mm (1.8 in) |
| 1989 | 23.9 mm (0.9 in) |
| 1990 | 18.3 mm (0.7 in) |
| 1991 | 36.1 mm (1.4 in) |
| 1992 | 94.5 mm (3.7 in) |
| 1993 | 71.4 mm (2.8 in) |
| 1994 | 42.2 mm (1.7 in) |
| 1995 | 60.2 mm (2.4 in) |
| 1996 | 73.2 mm (2.9 in) |
| 1997 | 60.2 mm (2.4 in) |
| 1998 | 55.4 mm (2.2 in) |
| 1999 | 69.1 mm (2.7 in) |
| 2000 | 47.0 mm (1.9 in) |
| 2001 | 60.2 mm (2.4 in) |
| 2002 | 58.2 mm (2.3 in) |
| 2003 | 72.4 mm (2.9 in) |
| 2004 | 53.8 mm (2.1 in) |
| 2005 | 35.1 mm (1.4 in) |
| 2006 | 64.3 mm (2.5 in) |
| 2007 | 63.2 mm (2.5 in) |
| 2008 | 49.5 mm (1.9 in) |
| 2009 | 53.8 mm (2.1 in) |
| 2010 | 128.3 mm (5.1 in) |
| 2012 | 0.0 mm (0.00 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1944 | 98.8 mm (3.9 in) |
| 1945 | 108.0 mm (4.3 in) |
| 1946 | 151.1 mm (5.9 in) |
| 1947 | 150.4 mm (5.9 in) |
| 1948 | 99.6 mm (3.9 in) |
| 1949 | 100.4 mm (4.0 in) |
| 1950 | 115.6 mm (4.6 in) |
| 1951 | 127.0 mm (5.0 in) |
| 1952 | 150.4 mm (5.9 in) |
| 1953 | 143.0 mm (5.6 in) |
| 1954 | 100.6 mm (4.0 in) |
| 1955 | 166.6 mm (6.6 in) |
| 1956 | 93.2 mm (3.7 in) |
| 1957 | 144.8 mm (5.7 in) |
| 1958 | 126.2 mm (5.0 in) |
| 1959 | 176.0 mm (6.9 in) |
| 1960 | 116.2 mm (4.6 in) |
| 1961 | 112.1 mm (4.4 in) |
| 1962 | 124.7 mm (4.9 in) |
| 1963 | 111.5 mm (4.4 in) |
| 1964 | 115.1 mm (4.5 in) |
| 1965 | 96.3 mm (3.8 in) |
| 1966 | 111.1 mm (4.4 in) |
| 1967 | 182.9 mm (7.2 in) |
| 1968 | 149.6 mm (5.9 in) |
| 1969 | 1.6 mm (0.06 in) |
| 1970 | 129.3 mm (5.1 in) |
| 1971 | 108.9 mm (4.3 in) |
| 1972 | 128.3 mm (5.1 in) |
| 1973 | 90.7 mm (3.6 in) |
| 1974 | 104.1 mm (4.1 in) |
| 1975 | 102.7 mm (4.0 in) |
| 1976 | 181.8 mm (7.2 in) |
| 1977 | 112.5 mm (4.4 in) |
| 1978 | 73.4 mm (2.9 in) |
| 1979 | 91.5 mm (3.6 in) |
| 1980 | 175.0 mm (6.9 in) |
| 1981 | 139.2 mm (5.5 in) |
| 1982 | 131.1 mm (5.2 in) |
| 1983 | 162.6 mm (6.4 in) |
| 1984 | 124.2 mm (4.9 in) |
| 1985 | 114.4 mm (4.5 in) |
| 1986 | 113.3 mm (4.5 in) |
| 1987 | 212.8 mm (8.4 in) |
| 1988 | 120.8 mm (4.8 in) |
| 1989 | 64.0 mm (2.5 in) |
| 1990 | 18.3 mm (0.7 in) |
| 1991 | 85.9 mm (3.4 in) |
| 1992 | 158.8 mm (6.3 in) |
| 1993 | 124.4 mm (4.9 in) |
| 1994 | 76.2 mm (3.0 in) |
| 1995 | 153.0 mm (6.0 in) |
| 1996 | 125.5 mm (4.9 in) |
| 1997 | 125.3 mm (4.9 in) |
| 1998 | 102.9 mm (4.1 in) |
| 1999 | 143.8 mm (5.7 in) |
| 2000 | 98.6 mm (3.9 in) |
| 2001 | 128.7 mm (5.1 in) |
| 2002 | 105.2 mm (4.1 in) |
| 2003 | 114.6 mm (4.5 in) |
| 2004 | 131.6 mm (5.2 in) |
| 2005 | 86.2 mm (3.4 in) |
| 2006 | 120.4 mm (4.7 in) |
| 2007 | 100.7 mm (4.0 in) |
| 2008 | 116.0 mm (4.6 in) |
| 2009 | 100.7 mm (4.0 in) |
| 2010 | 187.7 mm (7.4 in) |
| 2012 | 0.0 mm (0.00 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1944 | 31 days |
| 1945 | 69 days |
| 1946 | 59 days |
| 1947 | 73 days |
| 1948 | 44 days |
| 1949 | 95 days |
| 1950 | 70 days |
| 1951 | 74 days |
| 1952 | 45 days |
| 1953 | 86 days |
| 1954 | 123 days |
| 1955 | 119 days |
| 1956 | 113 days |
| 1957 | 68 days |
| 1958 | 68 days |
| 1959 | 56 days |
| 1960 | 131 days |
| 1961 | 76 days |
| 1962 | 74 days |
| 1963 | 58 days |
| 1964 | 129 days |
| 1965 | 38 days |
| 1966 | 48 days |
| 1967 | 47 days |
| 1968 | 32 days |
| 1969 | 59 days |
| 1970 | 68 days |
| 1971 | 31 days |
| 1972 | 35 days |
| 1973 | 37 days |
| 1974 | 38 days |
| 1975 | 114 days |
| 1976 | 56 days |
| 1977 | 46 days |
| 1978 | 42 days |
| 1979 | 54 days |
| 1980 | 39 days |
| 1981 | 36 days |
| 1982 | 53 days |
| 1983 | 125 days |
| 1984 | 73 days |
| 1985 | 70 days |
| 1986 | 56 days |
| 1987 | 79 days |
| 1988 | 95 days |
| 1989 | 86 days |
| 1990 | 31 days |
| 1991 | 124 days |
| 1992 | 39 days |
| 1993 | 102 days |
| 1994 | 108 days |
| 1995 | 57 days |
| 1996 | 136 days |
| 1997 | 63 days |
| 1998 | 138 days |
| 1999 | 55 days |
| 2000 | 142 days |
| 2001 | 133 days |
| 2002 | 101 days |
| 2003 | 128 days |
| 2004 | 55 days |
| 2005 | 91 days |
| 2006 | 80 days |
| 2007 | 120 days |
| 2008 | 72 days |
| 2009 | 117 days |
| 2010 | 79 days |
| 2012 | 31 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
45 years with a frostAcross 45 years with a frost, the median last spring frost at San Gregorio falls on 10 April and the median first autumn frost on 17 November, which leaves a median of 218 days between them.
Fitted over all years, the growing season changes by -2.3 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1966 to 2010) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 10 April | n/a | 13 April | n/a | +1.3 days per decade |
| First autumn frost | 17 November | n/a | 17 November | n/a | -1.0 days per decade |
| Growing days | 218 days | n/a | 217 days | n/a | -2.3 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
62 years, 1945 to 2010A day with at least 56.7 mm (2.2 in) of rain is expected about once in 2 years. A day with at least 125.1 mm (4.9 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 56.7 mm (2.2 in) | |
| 5 years | 74.2 mm (2.9 in) | |
| 10 years | 86.1 mm (3.4 in) | |
| 25 years | 101.5 mm (4.0 in) | |
| 50 years | 113.2 mm (4.5 in) | |
| 100 years | 125.1 mm (4.9 in) | Longer than the 62 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, 62 years of values from 1945 to 2010.
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: 128.3 mm (5.1 in) in 2010; 123.4 mm (4.9 in) in 1983; 100.6 mm (4.0 in) in 1981.
Station Changes
1 suspectedOne change was suspected in the annual mean temperature of San Gregorio, at 1988. Each is measured against neighbouring stations.
- Relative to 5 neighbouring stations, the station's annual mean temperature from 1988 ran 0.8 C (1.5 F) lower than in the years before (likely change).
| Year | Shift (C) | Shift (F) | Strength | Neighbours |
|---|---|---|---|---|
| 1988 | -0.8 | -1.5 | 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).