San Bartolo del Llano Weather Records (MXN00015085)
Record envelope, standing records and threshold days for San Bartolo del Llano (MXN00015085), Mexico, with 45 years of record.
Key Facts for San Bartolo del Llano
- San Bartolo del Llano (MXN00015085) is a weather station in Mexico at 19.52 latitude and -99.73 longitude, 2,587 m (8,487 ft) above sea level.
- The station reports from 1964 to 2008, 45 years of record.
- 1,464 records set at San Bartolo del Llano still stand.
- Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
- San Bartolo del Llano tied a daily record high maximum temperature of 22.8 C (73.0 F) on 29 December 2008.
About the Station
- Location: Mexico, 19.52 latitude, -99.73 longitude.
- Elevation: 2,587 m (8,487 ft).
- Period of record: 1964 to 2008, 45 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 | 25.0 C (77.0 F) | -8.9 C (16.0 F) | n/a | n/a |
| Feb | 26.7 C (80.1 F) | -8.9 C (16.0 F) | n/a | n/a |
| Mar | 30.0 C (86.0 F) | -6.7 C (19.9 F) | n/a | n/a |
| Apr | 30.6 C (87.1 F) | -2.8 C (27.0 F) | n/a | n/a |
| May | 31.1 C (88.0 F) | 0.6 C (33.1 F) | n/a | n/a |
| Jun | 30.0 C (86.0 F) | 0.6 C (33.1 F) | n/a | n/a |
| Jul | 25.0 C (77.0 F) | 0.0 C (32.0 F) | n/a | n/a |
| Aug | 25.6 C (78.1 F) | 2.8 C (37.0 F) | n/a | n/a |
| Sep | 25.0 C (77.0 F) | -2.2 C (28.0 F) | n/a | n/a |
| Oct | 26.1 C (79.0 F) | -5.0 C (23.0 F) | n/a | n/a |
| Nov | 26.1 C (79.0 F) | -6.7 C (19.9 F) | n/a | n/a |
| Dec | 25.0 C (77.0 F) | -7.8 C (18.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1965 | 45 |
| 1966 | 62 |
| 1967 | 47 |
| 1968 | 30 |
| 1969 | 92 |
| 1970 | 53 |
| 1971 | 35 |
| 1972 | 57 |
| 1973 | 51 |
| 1974 | 53 |
| 1975 | 39 |
| 1976 | 48 |
| 1977 | 31 |
| 1978 | 46 |
| 1979 | 58 |
| 1980 | 39 |
| 1981 | 43 |
| 1982 | 44 |
| 1983 | 55 |
| 1984 | 25 |
| 1985 | 25 |
| 1986 | 33 |
| 1987 | 41 |
| 1988 | 41 |
| 1989 | 24 |
| 1990 | 23 |
| 1991 | 14 |
| 1992 | 32 |
| 1993 | 11 |
| 1994 | 2 |
| 1995 | 21 |
| 1996 | 17 |
| 1997 | 39 |
| 1998 | 58 |
| 1999 | 25 |
| 2000 | 16 |
| 2001 | 19 |
| 2002 | 25 |
| 2003 | 18 |
| 2008 | 27 |
All-Time Record Progression
1 new records| Date | Kind | Detail |
|---|---|---|
| 1998-05-09 | Record high maximum temperature | Record high maximum temperature 31.1 C (88.0 F) |
Wettest Day of Each Month
Jul: 56.9 mm (2.2 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 46.5 mm (1.8 in) | 28 January 1992 |
| Feb | 19.8 mm (0.8 in) | 2 February 1992 |
| Mar | 39.4 mm (1.6 in) | 4 March 1988 |
| Apr | 31.5 mm (1.2 in) | 14 April 1973 |
| May | 26.2 mm (1.0 in) | 11 May 1980 |
| Jun | 55.9 mm (2.2 in) | 24 June 1970 |
| Jul | 56.9 mm (2.2 in) | 9 July 1972 |
| Aug | 50.8 mm (2.0 in) | 28 August 1981 |
| Sep | 42.4 mm (1.7 in) | 7 September 1996 |
| Oct | 35.8 mm (1.4 in) | 17 October 1994 |
| Nov | 52.8 mm (2.1 in) | 4 November 1967 |
| Dec | 23.9 mm (0.9 in) | 30 December 1995 |
Period of Record Coverage
1965 to 2008| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1965 | 298 | 82% | No |
| 1966 | 365 | 100% | Yes |
| 1967 | 359 | 98% | Yes |
| 1968 | 365 | 100% | Yes |
| 1969 | 334 | 92% | Yes |
| 1970 | 364 | 100% | Yes |
| 1971 | 365 | 100% | Yes |
| 1972 | 366 | 100% | Yes |
| 1973 | 365 | 100% | Yes |
| 1974 | 365 | 100% | Yes |
| 1975 | 365 | 100% | Yes |
| 1976 | 366 | 100% | Yes |
| 1977 | 365 | 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 | 328 | 90% | No |
| 1987 | 360 | 99% | Yes |
| 1988 | 361 | 99% | Yes |
| 1989 | 352 | 96% | Yes |
| 1990 | 363 | 99% | Yes |
| 1991 | 365 | 100% | Yes |
| 1992 | 366 | 100% | Yes |
| 1993 | 301 | 82% | No |
| 1994 | 93 | 25% | No |
| 1995 | 319 | 87% | No |
| 1996 | 352 | 96% | Yes |
| 1997 | 344 | 94% | Yes |
| 1998 | 338 | 93% | Yes |
| 1999 | 338 | 93% | Yes |
| 2000 | 354 | 97% | Yes |
| 2001 | 362 | 99% | Yes |
| 2002 | 364 | 100% | Yes |
| 2003 | 182 | 50% | No |
| 2008 | 366 | 100% | Yes |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 29 December 2008 | San Bartolo del Llano, MX | daily high max (Tie) | 22.8 C (73.0 F) | tie | 42 years | 4 of 100 (Routine) |
| 21 December 2008 | San Bartolo del Llano, MX | daily high max | 23.9 C (75.0 F) | 0.6 C (1.1 F) | 41 years | 18 of 100 (Routine) |
| 19 December 2008 | San Bartolo del Llano, MX | daily high max | 23.9 C (75.0 F) | 0.6 C (1.1 F) | 10 years | 9 of 100 (Routine) |
| 17 December 2008 | San Bartolo del Llano, MX | monthly high max | 25.0 C (77.0 F) | 0.6 C (1.1 F) | 42 years | 28 of 100 (Routine) |
| 15 December 2008 | San Bartolo del Llano, MX | daily high max | 23.3 C (73.9 F) | 0.5 C (0.9 F) | 41 years | 18 of 100 (Routine) |
| 14 December 2008 | San Bartolo del Llano, MX | daily high max (Tie) | 22.8 C (73.0 F) | tie | 38 years | 3 of 100 (Routine) |
| 11 December 2008 | San Bartolo del Llano, MX | daily low min | -5.0 C (23.0 F) | 0.6 C (1.1 F) | 42 years | 18 of 100 (Routine) |
| 5 December 2008 | San Bartolo del Llano, MX | daily high max (Tie) | 22.8 C (73.0 F) | tie | 42 years | 4 of 100 (Routine) |
| 29 November 2008 | San Bartolo del Llano, MX | daily high max | 23.9 C (75.0 F) | 1.1 C (2.0 F) | 39 years | 19 of 100 (Routine) |
| 20 November 2008 | San Bartolo del Llano, MX | daily low min (Tie) | -4.4 C (24.1 F) | tie | 38 years | 3 of 100 (Routine) |
| 12 November 2008 | San Bartolo del Llano, MX | daily high max | 25.0 C (77.0 F) | 0.6 C (1.1 F) | 8 years | 8 of 100 (Routine) |
| 29 October 2008 | San Bartolo del Llano, MX | daily low max | 14.4 C (57.9 F) | 0.6 C (1.1 F) | 7 years | 8 of 100 (Routine) |
| 19 October 2008 | San Bartolo del Llano, MX | daily low max (Tie) | 15.6 C (60.1 F) | tie | 42 years | 4 of 100 (Routine) |
| 13 September 2008 | San Bartolo del Llano, MX | monthly high max (Tie) | 25.0 C (77.0 F) | tie | 36 years | 6 of 100 (Routine) |
| 13 September 2008 | San Bartolo del Llano, MX | daily high min (Tie) | 11.7 C (53.1 F) | tie | 19 years | 2 of 100 (Routine) |
| 12 September 2008 | San Bartolo del Llano, MX | daily high max (Tie) | 23.3 C (73.9 F) | tie | 36 years | 3 of 100 (Routine) |
| 12 September 2008 | San Bartolo del Llano, MX | daily high min (Tie) | 12.2 C (54.0 F) | tie | 10 years | 1 of 100 (Routine) |
| 11 September 2008 | San Bartolo del Llano, MX | daily rain | 22.9 mm (0.9 in) | 0.5 mm (0.02 in) | 26 years | 11 of 100 (Routine) |
| 11 September 2008 | San Bartolo del Llano, MX | daily high min (Tie) | 11.7 C (53.1 F) | tie | 10 years | 1 of 100 (Routine) |
| 10 September 2008 | San Bartolo del Llano, MX | daily high min (Tie) | 11.7 C (53.1 F) | tie | 39 years | 3 of 100 (Routine) |
Climate Trend
33 complete years, 1966 to 2008| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1966 | 13.0 C | +0.12 C |
| 1967 | 13.3 C | +0.41 C |
| 1968 | 13.2 C | +0.28 C |
| 1970 | 13.2 C | +0.33 C |
| 1971 | 13.1 C | +0.20 C |
| 1972 | 13.5 C | +0.60 C |
| 1973 | 13.6 C | +0.72 C |
| 1974 | 13.1 C | +0.24 C |
| 1975 | 12.3 C | -0.57 C |
| 1976 | 12.5 C | -0.34 C |
| 1977 | 12.4 C | -0.44 C |
| 1978 | 12.6 C | -0.29 C |
| 1979 | 12.5 C | -0.39 C |
| 1980 | 12.8 C | -0.12 C |
| 1981 | 12.8 C | -0.11 C |
| 1982 | 13.0 C | +0.07 C |
| 1983 | 12.6 C | -0.25 C |
| 1984 | 12.6 C | -0.25 C |
| 1985 | 12.6 C | -0.30 C |
| 1987 | 12.6 C | -0.26 C |
| 1988 | 12.7 C | -0.16 C |
| 1989 | 12.4 C | -0.53 C |
| 1990 | 12.9 C | +0.02 C |
| 1991 | 13.2 C | +0.29 C |
| 1992 | 12.6 C | -0.24 C |
| 1996 | 12.9 C | +0.05 C |
| 1997 | 13.1 C | +0.24 C |
| 1998 | 13.6 C | +0.74 C |
| 1999 | 12.6 C | -0.28 C |
| 2000 | 12.7 C | -0.19 C |
| 2001 | 12.8 C | -0.13 C |
| 2002 | 13.2 C | +0.31 C |
| 2008 | 13.0 C | +0.14 C |
The fitted trend in annual mean temperature here over 1966 to 2008 is -0.03 C (-0.14 to 0.08) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.3 to 0.1) per decade. The slope is a straight line fitted to 33 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 (-0.14 to 0.08) per decade | -0.1 F (-0.3 to 0.1) per decade | 1966 to 2008 | 33 | Not clearly different from zero |
| Mean daily maximum | -0.2 C (-0.4 to 0.1) per decade | -0.3 F (-0.8 to 0.2) per decade | 1966 to 2008 | 33 | Not clearly different from zero |
| Mean daily minimum | 0.1 C (-0.1 to 0.3) per decade | 0.2 F (-0.1 to 0.5) per decade | 1966 to 2008 | 33 | 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
1964 to 2008| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 31.1 C (88.0 F) | 1998 | 28.6 C (83.5 F) | 40 |
| Coldest night (TNn) | -8.9 C (16.0 F) | 1976 | -6.1 C (21.0 F) | 40 |
| Wettest day (Rx1day) | 56.9 mm (2.2 in) | 1972 | 40.4 mm (1.6 in) | 41 |
| Wettest five days (Rx5day) | 129.4 mm (5.1 in) | 1970 | 76.7 mm (3.0 in) | 41 |
| Longest dry spell (CDD) | 115 days | 2000 | 50 days | 41 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1964 | n/a |
| 1965 | 28.9 C (84.0 F) |
| 1966 | 28.9 C (84.0 F) |
| 1967 | 30.0 C (86.0 F) |
| 1968 | 28.9 C (84.0 F) |
| 1969 | 30.0 C (86.0 F) |
| 1970 | 30.6 C (87.1 F) |
| 1971 | 30.6 C (87.1 F) |
| 1972 | 28.9 C (84.0 F) |
| 1973 | 30.0 C (86.0 F) |
| 1974 | 30.0 C (86.0 F) |
| 1975 | 28.3 C (82.9 F) |
| 1976 | 26.1 C (79.0 F) |
| 1977 | 28.9 C (84.0 F) |
| 1978 | 27.8 C (82.0 F) |
| 1979 | 26.1 C (79.0 F) |
| 1980 | 26.7 C (80.1 F) |
| 1981 | 26.7 C (80.1 F) |
| 1982 | 27.8 C (82.0 F) |
| 1983 | 30.0 C (86.0 F) |
| 1984 | 28.3 C (82.9 F) |
| 1985 | 27.8 C (82.0 F) |
| 1986 | 27.2 C (81.0 F) |
| 1987 | 26.7 C (80.1 F) |
| 1988 | 28.9 C (84.0 F) |
| 1989 | 27.8 C (82.0 F) |
| 1990 | 26.7 C (80.1 F) |
| 1991 | 28.3 C (82.9 F) |
| 1992 | 26.1 C (79.0 F) |
| 1993 | 28.3 C (82.9 F) |
| 1994 | 23.3 C (73.9 F) |
| 1995 | 30.0 C (86.0 F) |
| 1996 | 27.8 C (82.0 F) |
| 1997 | 27.2 C (81.0 F) |
| 1998 | 31.1 C (88.0 F) |
| 1999 | 30.0 C (86.0 F) |
| 2000 | 27.8 C (82.0 F) |
| 2001 | 28.9 C (84.0 F) |
| 2002 | 28.9 C (84.0 F) |
| 2003 | 31.1 C (88.0 F) |
| 2008 | 30.0 C (86.0 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1964 | n/a |
| 1965 | -2.2 C (28.0 F) |
| 1966 | -8.3 C (17.1 F) |
| 1967 | -6.1 C (21.0 F) |
| 1968 | -5.0 C (23.0 F) |
| 1969 | -6.1 C (21.0 F) |
| 1970 | -6.1 C (21.0 F) |
| 1971 | -6.7 C (19.9 F) |
| 1972 | -5.6 C (21.9 F) |
| 1973 | -6.7 C (19.9 F) |
| 1974 | -6.1 C (21.0 F) |
| 1975 | -7.8 C (18.0 F) |
| 1976 | -8.9 C (16.0 F) |
| 1977 | -4.4 C (24.1 F) |
| 1978 | -4.4 C (24.1 F) |
| 1979 | -4.4 C (24.1 F) |
| 1980 | -7.2 C (19.0 F) |
| 1981 | -6.7 C (19.9 F) |
| 1982 | -7.2 C (19.0 F) |
| 1983 | -7.2 C (19.0 F) |
| 1984 | -3.9 C (25.0 F) |
| 1985 | -5.0 C (23.0 F) |
| 1986 | -8.9 C (16.0 F) |
| 1987 | -7.2 C (19.0 F) |
| 1988 | -8.9 C (16.0 F) |
| 1989 | -6.7 C (19.9 F) |
| 1990 | -5.0 C (23.0 F) |
| 1991 | -5.6 C (21.9 F) |
| 1992 | -3.3 C (26.1 F) |
| 1993 | -3.3 C (26.1 F) |
| 1994 | -4.4 C (24.1 F) |
| 1995 | -4.4 C (24.1 F) |
| 1996 | -7.2 C (19.0 F) |
| 1997 | -8.9 C (16.0 F) |
| 1998 | -8.3 C (17.1 F) |
| 1999 | -6.1 C (21.0 F) |
| 2000 | -5.6 C (21.9 F) |
| 2001 | -5.0 C (23.0 F) |
| 2002 | -6.7 C (19.9 F) |
| 2003 | -3.9 C (25.0 F) |
| 2008 | -6.1 C (21.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1964 | 26.7 mm (1.1 in) |
| 1965 | 37.8 mm (1.5 in) |
| 1966 | 39.9 mm (1.6 in) |
| 1967 | 52.8 mm (2.1 in) |
| 1968 | 48.3 mm (1.9 in) |
| 1969 | 47.8 mm (1.9 in) |
| 1970 | 55.9 mm (2.2 in) |
| 1971 | 50.5 mm (2.0 in) |
| 1972 | 56.9 mm (2.2 in) |
| 1973 | 41.7 mm (1.6 in) |
| 1974 | 32.8 mm (1.3 in) |
| 1975 | 52.1 mm (2.1 in) |
| 1976 | 36.6 mm (1.4 in) |
| 1977 | 33.8 mm (1.3 in) |
| 1978 | 31.5 mm (1.2 in) |
| 1979 | 40.4 mm (1.6 in) |
| 1980 | 32.8 mm (1.3 in) |
| 1981 | 50.8 mm (2.0 in) |
| 1982 | 25.9 mm (1.0 in) |
| 1983 | 37.8 mm (1.5 in) |
| 1984 | 25.9 mm (1.0 in) |
| 1985 | 42.2 mm (1.7 in) |
| 1986 | 24.4 mm (1.0 in) |
| 1987 | 33.8 mm (1.3 in) |
| 1988 | 50.0 mm (2.0 in) |
| 1989 | 40.9 mm (1.6 in) |
| 1990 | 41.1 mm (1.6 in) |
| 1991 | 23.9 mm (0.9 in) |
| 1992 | 46.5 mm (1.8 in) |
| 1993 | 49.3 mm (1.9 in) |
| 1994 | 35.8 mm (1.4 in) |
| 1995 | 50.8 mm (2.0 in) |
| 1996 | 42.4 mm (1.7 in) |
| 1997 | 32.3 mm (1.3 in) |
| 1998 | 31.8 mm (1.3 in) |
| 1999 | 40.9 mm (1.6 in) |
| 2000 | 33.8 mm (1.3 in) |
| 2001 | 40.4 mm (1.6 in) |
| 2002 | 42.9 mm (1.7 in) |
| 2003 | 39.9 mm (1.6 in) |
| 2008 | 31.0 mm (1.2 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1964 | 54.4 mm (2.1 in) |
| 1965 | 78.0 mm (3.1 in) |
| 1966 | 87.4 mm (3.4 in) |
| 1967 | 74.8 mm (2.9 in) |
| 1968 | 91.5 mm (3.6 in) |
| 1969 | 107.2 mm (4.2 in) |
| 1970 | 129.4 mm (5.1 in) |
| 1971 | 99.6 mm (3.9 in) |
| 1972 | 66.9 mm (2.6 in) |
| 1973 | 112.8 mm (4.4 in) |
| 1974 | 62.0 mm (2.4 in) |
| 1975 | 81.9 mm (3.2 in) |
| 1976 | 101.6 mm (4.0 in) |
| 1977 | 70.7 mm (2.8 in) |
| 1978 | 57.5 mm (2.3 in) |
| 1979 | 76.7 mm (3.0 in) |
| 1980 | 95.8 mm (3.8 in) |
| 1981 | 83.8 mm (3.3 in) |
| 1982 | 56.2 mm (2.2 in) |
| 1983 | 77.5 mm (3.1 in) |
| 1984 | 62.7 mm (2.5 in) |
| 1985 | 67.5 mm (2.7 in) |
| 1986 | 54.2 mm (2.1 in) |
| 1987 | 80.6 mm (3.2 in) |
| 1988 | 69.2 mm (2.7 in) |
| 1989 | 102.7 mm (4.0 in) |
| 1990 | 77.8 mm (3.1 in) |
| 1991 | 58.3 mm (2.3 in) |
| 1992 | 72.9 mm (2.9 in) |
| 1993 | 69.4 mm (2.7 in) |
| 1994 | 61.3 mm (2.4 in) |
| 1995 | 76.2 mm (3.0 in) |
| 1996 | 100.6 mm (4.0 in) |
| 1997 | 64.0 mm (2.5 in) |
| 1998 | 93.8 mm (3.7 in) |
| 1999 | 104.2 mm (4.1 in) |
| 2000 | 56.7 mm (2.2 in) |
| 2001 | 77.3 mm (3.0 in) |
| 2002 | 67.9 mm (2.7 in) |
| 2003 | 68.7 mm (2.7 in) |
| 2008 | 80.8 mm (3.2 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1964 | 39 days |
| 1965 | 48 days |
| 1966 | 49 days |
| 1967 | 32 days |
| 1968 | 41 days |
| 1969 | 90 days |
| 1970 | 43 days |
| 1971 | 68 days |
| 1972 | 46 days |
| 1973 | 57 days |
| 1974 | 38 days |
| 1975 | 63 days |
| 1976 | 53 days |
| 1977 | 32 days |
| 1978 | 28 days |
| 1979 | 41 days |
| 1980 | 50 days |
| 1981 | 45 days |
| 1982 | 60 days |
| 1983 | 69 days |
| 1984 | 58 days |
| 1985 | 57 days |
| 1986 | 45 days |
| 1987 | 49 days |
| 1988 | 52 days |
| 1989 | 82 days |
| 1990 | 37 days |
| 1991 | 50 days |
| 1992 | 68 days |
| 1993 | 92 days |
| 1994 | 46 days |
| 1995 | 51 days |
| 1996 | 67 days |
| 1997 | 38 days |
| 1998 | 111 days |
| 1999 | 78 days |
| 2000 | 115 days |
| 2001 | 33 days |
| 2002 | 29 days |
| 2003 | 56 days |
| 2008 | 81 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
33 years with a frostAcross 33 years with a frost, the median last spring frost at San Bartolo del Llano falls on 22 March and the median first autumn frost on 2 November, which leaves a median of 221 days between them.
Fitted over all years, the growing season changes by +2.0 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1970 to 2008) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 22 March | n/a | 22 March | n/a | -3.0 days per decade |
| First autumn frost | 2 November | n/a | 5 November | n/a | -1.0 days per decade |
| Growing days | 221 days | n/a | 223 days | n/a | +2.0 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
37 years, 1965 to 2008A day with at least 39.8 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 61.1 mm (2.4 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 39.8 mm (1.6 in) | |
| 5 years | 47.9 mm (1.9 in) | |
| 10 years | 52.1 mm (2.1 in) | |
| 25 years | 56.4 mm (2.2 in) | |
| 50 years | 59.0 mm (2.3 in) | Longer than the 37 years of record |
| 100 years | 61.1 mm (2.4 in) | Longer than the 37 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, 37 years of values from 1965 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: 56.9 mm (2.2 in) in 1972; 55.9 mm (2.2 in) in 1970; 52.8 mm (2.1 in) in 1967.
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).