Williamsburg Weather Records (USC00158709)
Record envelope, standing records and threshold days for Williamsburg (USC00158709), Kentucky, United States, with 48 years of record.
Key Facts for Williamsburg
- Williamsburg (USC00158709) is a weather station in Kentucky, United States at 36.73 latitude and -84.15 longitude, 287 m (940 ft) above sea level.
- The station reports from 1957 to 2004, 48 years of record.
- 1,464 records set at Williamsburg still stand.
- Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
- Williamsburg set a daily record precipitation of 31.0 mm (1.2 in) on 18 January 2004.
About the Station
- Location: Kentucky, United States, 36.73 latitude, -84.15 longitude.
- Elevation: 287 m (940 ft).
- Period of record: 1957 to 2004, 48 years.
- Eligible elements: tmax, tmin, prcp, snow, snwd.
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 | 23.9 C (75.0 F) | -29.4 C (-20.9 F) | n/a | n/a |
| Feb | 27.8 C (82.0 F) | -28.3 C (-18.9 F) | n/a | n/a |
| Mar | 31.1 C (88.0 F) | -20.0 C (-4.0 F) | n/a | n/a |
| Apr | 33.3 C (91.9 F) | -7.2 C (19.0 F) | n/a | n/a |
| May | 35.0 C (95.0 F) | -2.2 C (28.0 F) | n/a | n/a |
| Jun | 38.3 C (100.9 F) | 2.2 C (36.0 F) | n/a | n/a |
| Jul | 39.4 C (102.9 F) | 7.2 C (45.0 F) | n/a | n/a |
| Aug | 37.8 C (100.0 F) | 5.6 C (42.1 F) | n/a | n/a |
| Sep | 37.2 C (99.0 F) | -0.6 C (30.9 F) | n/a | n/a |
| Oct | 32.8 C (91.0 F) | -6.7 C (19.9 F) | n/a | n/a |
| Nov | 28.3 C (82.9 F) | -11.7 C (10.9 F) | n/a | n/a |
| Dec | 25.0 C (77.0 F) | -23.9 C (-11.0 F) | n/a | n/a |
Which Years Hold Standing Records
1,464 standing records| Year set | Standing records |
|---|---|
| 1957 | 17 |
| 1958 | 24 |
| 1959 | 43 |
| 1960 | 47 |
| 1961 | 52 |
| 1962 | 59 |
| 1963 | 46 |
| 1964 | 34 |
| 1965 | 24 |
| 1966 | 38 |
| 1967 | 47 |
| 1968 | 29 |
| 1969 | 25 |
| 1970 | 32 |
| 1971 | 31 |
| 1972 | 25 |
| 1973 | 22 |
| 1974 | 34 |
| 1975 | 13 |
| 1976 | 35 |
| 1977 | 34 |
| 1978 | 16 |
| 1979 | 27 |
| 1980 | 37 |
| 1981 | 20 |
| 1982 | 31 |
| 1983 | 40 |
| 1984 | 31 |
| 1985 | 27 |
| 1986 | 40 |
| 1987 | 34 |
| 1988 | 45 |
| 1989 | 36 |
| 1990 | 28 |
| 1991 | 40 |
| 1992 | 13 |
| 1993 | 18 |
| 1994 | 19 |
| 1995 | 31 |
| 1996 | 55 |
| 1997 | 34 |
| 1998 | 24 |
| 1999 | 12 |
| 2000 | 25 |
| 2001 | 19 |
| 2002 | 31 |
| 2003 | 17 |
| 2004 | 3 |
All-Time Record Progression
3 new records| Date | Kind | Detail |
|---|---|---|
| 1988-07-09 | Record high maximum temperature | Record high maximum temperature 39.4 C (102.9 F) |
| 1994-01-18 | Record daily snowfall | Record daily snowfall 21.6 cm (8.5 in) |
| 1994-01-19 | Record low minimum temperature | Record low minimum temperature -29.4 C (-20.9 F) |
Wettest Day of Each Month
May: 117.6 mm (4.6 in)| Month | Record daily precipitation (mm) | Date |
|---|---|---|
| Jan | 71.9 mm (2.8 in) | 19 January 2001 |
| Feb | 67.6 mm (2.7 in) | 11 February 1994 |
| Mar | 109.0 mm (4.3 in) | 18 March 2002 |
| Apr | 60.7 mm (2.4 in) | 19 April 1998 |
| May | 117.6 mm (4.6 in) | 7 May 1984 |
| Jun | 69.9 mm (2.8 in) | 15 June 1997 |
| Jul | 95.5 mm (3.8 in) | 11 July 1960 |
| Aug | 82.0 mm (3.2 in) | 26 August 2002 |
| Sep | 111.5 mm (4.4 in) | 23 September 1989 |
| Oct | 63.5 mm (2.5 in) | 8 October 1990 |
| Nov | 77.7 mm (3.1 in) | 27 November 1973 |
| Dec | 95.3 mm (3.8 in) | 3 December 1991 |
Period of Record Coverage
1957 to 2004| Year | Days with data | Share of year | Complete |
|---|---|---|---|
| 1957 | 151 | 41% | No |
| 1958 | 365 | 100% | Yes |
| 1959 | 364 | 100% | Yes |
| 1960 | 365 | 100% | Yes |
| 1961 | 365 | 100% | Yes |
| 1962 | 364 | 100% | Yes |
| 1963 | 365 | 100% | Yes |
| 1964 | 335 | 92% | Yes |
| 1965 | 292 | 80% | No |
| 1966 | 364 | 100% | Yes |
| 1967 | 364 | 100% | Yes |
| 1968 | 304 | 83% | No |
| 1969 | 357 | 98% | Yes |
| 1970 | 360 | 99% | Yes |
| 1971 | 357 | 98% | Yes |
| 1972 | 227 | 62% | No |
| 1973 | 355 | 97% | Yes |
| 1974 | 360 | 99% | Yes |
| 1975 | 359 | 98% | Yes |
| 1976 | 360 | 98% | Yes |
| 1977 | 339 | 93% | Yes |
| 1978 | 351 | 96% | Yes |
| 1979 | 337 | 92% | Yes |
| 1980 | 362 | 99% | Yes |
| 1981 | 352 | 96% | Yes |
| 1982 | 362 | 99% | Yes |
| 1983 | 352 | 96% | Yes |
| 1984 | 365 | 100% | Yes |
| 1985 | 335 | 92% | Yes |
| 1986 | 362 | 99% | Yes |
| 1987 | 364 | 100% | Yes |
| 1988 | 332 | 91% | Yes |
| 1989 | 364 | 100% | Yes |
| 1990 | 335 | 92% | Yes |
| 1991 | 362 | 99% | Yes |
| 1992 | 365 | 100% | Yes |
| 1993 | 365 | 100% | Yes |
| 1994 | 365 | 100% | Yes |
| 1995 | 365 | 100% | Yes |
| 1996 | 363 | 99% | Yes |
| 1997 | 363 | 99% | Yes |
| 1998 | 364 | 100% | Yes |
| 1999 | 362 | 99% | Yes |
| 2000 | 363 | 99% | Yes |
| 2001 | 365 | 100% | Yes |
| 2002 | 364 | 100% | Yes |
| 2003 | 365 | 100% | Yes |
| 2004 | 31 | 8% | No |
Latest Records
20| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 18 January 2004 | Williamsburg, US | daily rain | 31.0 mm (1.2 in) | 3.1 mm (0.12 in) | 9 years | 9 of 100 (Routine) |
| 9 January 2004 | Williamsburg, US | daily snowfall | 5.8 cm (2.3 in) | 3.8 cm (1.5 in) | 14 years | 15 of 100 (Routine) |
| 7 January 2004 | Williamsburg, US | daily low max | -2.8 C (27.0 F) | 1.1 C (2.0 F) | 32 years | 14 of 100 (Routine) |
| 5 January 2004 | Williamsburg, US | daily high min | 11.1 C (52.0 F) | 2.2 C (4.0 F) | 6 years | 9 of 100 (Routine) |
| 4 January 2004 | Williamsburg, US | daily high min | 10.6 C (51.1 F) | 0.6 C (1.1 F) | 4 years | 5 of 100 (Routine) |
| 2 January 2004 | Williamsburg, US | daily rain | 29.7 mm (1.2 in) | 6.6 mm (0.26 in) | 8 years | 12 of 100 (Routine) |
| 19 December 2003 | Williamsburg, US | daily snowfall | 5.1 cm (2.0 in) | 2.1 cm (0.8 in) | 6 years | 11 of 100 (Routine) |
| 17 December 2003 | Williamsburg, US | daily snowfall | 0.5 cm (0.2 in) | 0.5 cm (0.2 in) | 45 years | 18 of 100 (Routine) |
| 29 November 2003 | Williamsburg, US | daily snowfall | 1.0 cm (0.4 in) | 1.0 cm (0.4 in) | 45 years | 19 of 100 (Routine) |
| 28 November 2003 | Williamsburg, US | daily snowfall | 0.5 cm (0.2 in) | 0.5 cm (0.2 in) | 45 years | 18 of 100 (Routine) |
| 19 November 2003 | Williamsburg, US | daily high min (Tie) | 11.7 C (53.1 F) | tie | 38 years | 3 of 100 (Routine) |
| 6 November 2003 | Williamsburg, US | daily high min | 15.0 C (59.0 F) | 1.1 C (2.0 F) | 25 years | 12 of 100 (Routine) |
| 5 November 2003 | Williamsburg, US | daily high max | 27.2 C (81.0 F) | 0.5 C (0.9 F) | 28 years | 12 of 100 (Routine) |
| 27 October 2003 | Williamsburg, US | daily rain | 24.6 mm (1.0 in) | 0.2 mm (0.01 in) | 21 years | 10 of 100 (Routine) |
| 22 September 2003 | Williamsburg, US | daily rain | 55.1 mm (2.2 in) | 11.2 mm (0.4 in) | 24 years | 18 of 100 (Routine) |
| 8 September 2003 | Williamsburg, US | daily low max (Tie) | 23.3 C (73.9 F) | tie | 16 years | 2 of 100 (Routine) |
| 3 September 2003 | Williamsburg, US | daily rain | 43.2 mm (1.7 in) | 13.0 mm (0.5 in) | 22 years | 19 of 100 (Routine) |
| 31 August 2003 | Williamsburg, US | daily high min (Tie) | 19.4 C (66.9 F) | tie | 42 years | 4 of 100 (Routine) |
| 12 August 2003 | Williamsburg, US | daily low max | 23.3 C (73.9 F) | 1.1 C (2.0 F) | 32 years | 16 of 100 (Routine) |
| 9 August 2003 | Williamsburg, US | daily low max (Tie) | 24.4 C (75.9 F) | tie | 32 years | 3 of 100 (Routine) |
Climate Trend
38 complete years, 1958 to 2003| Year | Annual mean temperature | Difference from the station mean |
|---|---|---|
| 1958 | 12.5 C | -0.62 C |
| 1959 | 14.1 C | +1.02 C |
| 1960 | 13.0 C | -0.09 C |
| 1961 | 13.6 C | +0.46 C |
| 1962 | 13.7 C | +0.62 C |
| 1963 | 12.4 C | -0.74 C |
| 1966 | 13.5 C | +0.36 C |
| 1967 | 14.0 C | +0.90 C |
| 1969 | 13.5 C | +0.34 C |
| 1970 | 14.1 C | +0.99 C |
| 1971 | 14.5 C | +1.35 C |
| 1973 | 13.4 C | +0.32 C |
| 1974 | 13.2 C | +0.09 C |
| 1975 | 13.2 C | +0.05 C |
| 1976 | 11.6 C | -1.53 C |
| 1977 | 12.7 C | -0.41 C |
| 1978 | 12.1 C | -0.97 C |
| 1980 | 12.7 C | -0.38 C |
| 1981 | 12.1 C | -1.03 C |
| 1982 | 13.4 C | +0.31 C |
| 1983 | 12.8 C | -0.31 C |
| 1984 | 13.5 C | +0.43 C |
| 1986 | 13.9 C | +0.77 C |
| 1987 | 14.3 C | +1.23 C |
| 1989 | 13.2 C | +0.09 C |
| 1991 | 14.5 C | +1.40 C |
| 1992 | 13.1 C | -0.01 C |
| 1993 | 13.1 C | -0.06 C |
| 1994 | 12.8 C | -0.31 C |
| 1995 | 12.6 C | -0.51 C |
| 1996 | 10.7 C | -2.38 C |
| 1997 | 11.5 C | -1.61 C |
| 1998 | 14.0 C | +0.93 C |
| 1999 | 13.5 C | +0.41 C |
| 2000 | 12.7 C | -0.45 C |
| 2001 | 13.0 C | -0.10 C |
| 2002 | 13.3 C | +0.18 C |
| 2003 | 12.4 C | -0.71 C |
The fitted trend in annual mean temperature here over 1958 to 2003 is -0.1 C (-0.3 to 0.1) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.2 F (-0.6 to 0.1) per decade. The slope is a straight line fitted to 38 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 (-0.3 to 0.1) per decade | -0.2 F (-0.6 to 0.1) per decade | 1958 to 2003 | 38 | Not clearly different from zero |
| Mean daily maximum | -0.27 C (-0.51 to -0.03) per decade | -0.5 F (-0.9 to -0.1) per decade | 1958 to 2003 | 38 | Fall |
| Mean daily minimum | 0.00 C (-0.25 to 0.25) per decade | 0.00 F (-0.45 to 0.45) per decade | 1958 to 2003 | 38 | 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
1957 to 2004| Measure | Record | Year of the record | Median year | Years with a value |
|---|---|---|---|---|
| Hottest day (TXx) | 39.4 C (102.9 F) | 1988 | 35.0 C (95.0 F) | 48 |
| Coldest night (TNn) | -29.4 C (-20.9 F) | 1994 | -18.0 C (-0.5 F) | 48 |
| Wettest day (Rx1day) | 117.6 mm (4.6 in) | 1984 | 61.1 mm (2.4 in) | 48 |
| Wettest five days (Rx5day) | 195.8 mm (7.7 in) | 1964 | 97.4 mm (3.8 in) | 48 |
| Longest dry spell (CDD) | 31 days | 1963 | 17 days | 48 |
Hottest day (TXx)
| Year | Hottest day (TXx) |
|---|---|
| 1957 | 37.2 C (99.0 F) |
| 1958 | 34.4 C (93.9 F) |
| 1959 | 35.6 C (96.1 F) |
| 1960 | 36.1 C (97.0 F) |
| 1961 | 36.1 C (97.0 F) |
| 1962 | 37.8 C (100.0 F) |
| 1963 | 33.3 C (91.9 F) |
| 1964 | 35.6 C (96.1 F) |
| 1965 | 38.9 C (102.0 F) |
| 1966 | 36.7 C (98.1 F) |
| 1967 | 32.2 C (90.0 F) |
| 1968 | 35.0 C (95.0 F) |
| 1969 | 33.9 C (93.0 F) |
| 1970 | 33.9 C (93.0 F) |
| 1971 | 33.3 C (91.9 F) |
| 1972 | 35.6 C (96.1 F) |
| 1973 | 34.4 C (93.9 F) |
| 1974 | 35.0 C (95.0 F) |
| 1975 | 34.4 C (93.9 F) |
| 1976 | 33.3 C (91.9 F) |
| 1977 | 35.6 C (96.1 F) |
| 1978 | 36.7 C (98.1 F) |
| 1979 | 32.8 C (91.0 F) |
| 1980 | 38.3 C (100.9 F) |
| 1981 | 33.3 C (91.9 F) |
| 1982 | 32.8 C (91.0 F) |
| 1983 | 37.2 C (99.0 F) |
| 1984 | 33.3 C (91.9 F) |
| 1985 | 34.4 C (93.9 F) |
| 1986 | 36.1 C (97.0 F) |
| 1987 | 37.2 C (99.0 F) |
| 1988 | 39.4 C (102.9 F) |
| 1989 | 33.9 C (93.0 F) |
| 1990 | 37.2 C (99.0 F) |
| 1991 | 35.0 C (95.0 F) |
| 1992 | 35.6 C (96.1 F) |
| 1993 | 36.7 C (98.1 F) |
| 1994 | 34.4 C (93.9 F) |
| 1995 | 36.7 C (98.1 F) |
| 1996 | 33.3 C (91.9 F) |
| 1997 | 33.3 C (91.9 F) |
| 1998 | 35.6 C (96.1 F) |
| 1999 | 36.7 C (98.1 F) |
| 2000 | 32.8 C (91.0 F) |
| 2001 | 32.8 C (91.0 F) |
| 2002 | 34.4 C (93.9 F) |
| 2003 | 31.7 C (89.1 F) |
| 2004 | 20.6 C (69.1 F) |
Coldest night (TNn)
| Year | Coldest night (TNn) |
|---|---|
| 1957 | -16.7 C (1.9 F) |
| 1958 | -19.4 C (-2.9 F) |
| 1959 | -18.9 C (-2.0 F) |
| 1960 | -18.9 C (-2.0 F) |
| 1961 | -21.1 C (-6.0 F) |
| 1962 | -23.3 C (-9.9 F) |
| 1963 | -25.0 C (-13.0 F) |
| 1964 | -14.4 C (6.1 F) |
| 1965 | -17.8 C (0.0 F) |
| 1966 | -24.4 C (-11.9 F) |
| 1967 | -18.9 C (-2.0 F) |
| 1968 | -17.2 C (1.0 F) |
| 1969 | -18.9 C (-2.0 F) |
| 1970 | -22.8 C (-9.0 F) |
| 1971 | -17.2 C (1.0 F) |
| 1972 | -13.9 C (7.0 F) |
| 1973 | -17.2 C (1.0 F) |
| 1974 | -12.8 C (9.0 F) |
| 1975 | -13.3 C (8.1 F) |
| 1976 | -17.8 C (0.0 F) |
| 1977 | -23.3 C (-9.9 F) |
| 1978 | -18.3 C (-0.9 F) |
| 1979 | -15.6 C (3.9 F) |
| 1980 | -20.0 C (-4.0 F) |
| 1981 | -21.1 C (-6.0 F) |
| 1982 | -25.6 C (-14.1 F) |
| 1983 | -23.9 C (-11.0 F) |
| 1984 | -23.3 C (-9.9 F) |
| 1985 | -26.7 C (-16.1 F) |
| 1986 | -18.9 C (-2.0 F) |
| 1987 | -20.0 C (-4.0 F) |
| 1988 | -15.6 C (3.9 F) |
| 1989 | -22.8 C (-9.0 F) |
| 1990 | -11.1 C (12.0 F) |
| 1991 | -16.1 C (3.0 F) |
| 1992 | -15.0 C (5.0 F) |
| 1993 | -16.7 C (1.9 F) |
| 1994 | -29.4 C (-20.9 F) |
| 1995 | -22.2 C (-8.0 F) |
| 1996 | -28.3 C (-18.9 F) |
| 1997 | -16.1 C (3.0 F) |
| 1998 | -10.0 C (14.0 F) |
| 1999 | -12.8 C (9.0 F) |
| 2000 | -15.0 C (5.0 F) |
| 2001 | -16.7 C (1.9 F) |
| 2002 | -12.2 C (10.0 F) |
| 2003 | -15.6 C (3.9 F) |
| 2004 | -13.9 C (7.0 F) |
Wettest day (Rx1day)
| Year | Wettest day (Rx1day) |
|---|---|
| 1957 | 58.2 mm (2.3 in) |
| 1958 | 61.7 mm (2.4 in) |
| 1959 | 66.5 mm (2.6 in) |
| 1960 | 95.5 mm (3.8 in) |
| 1961 | 38.1 mm (1.5 in) |
| 1962 | 65.8 mm (2.6 in) |
| 1963 | 82.0 mm (3.2 in) |
| 1964 | 105.7 mm (4.2 in) |
| 1965 | 48.3 mm (1.9 in) |
| 1966 | 44.2 mm (1.7 in) |
| 1967 | 51.3 mm (2.0 in) |
| 1968 | 50.0 mm (2.0 in) |
| 1969 | 62.7 mm (2.5 in) |
| 1970 | 47.5 mm (1.9 in) |
| 1971 | 56.1 mm (2.2 in) |
| 1972 | 41.7 mm (1.6 in) |
| 1973 | 87.6 mm (3.4 in) |
| 1974 | 57.7 mm (2.3 in) |
| 1975 | 81.0 mm (3.2 in) |
| 1976 | 58.7 mm (2.3 in) |
| 1977 | 54.9 mm (2.2 in) |
| 1978 | 61.7 mm (2.4 in) |
| 1979 | 50.3 mm (2.0 in) |
| 1980 | 90.7 mm (3.6 in) |
| 1981 | 53.1 mm (2.1 in) |
| 1982 | 48.0 mm (1.9 in) |
| 1983 | 67.3 mm (2.6 in) |
| 1984 | 117.6 mm (4.6 in) |
| 1985 | 54.1 mm (2.1 in) |
| 1986 | 72.6 mm (2.9 in) |
| 1987 | 45.5 mm (1.8 in) |
| 1988 | 51.8 mm (2.0 in) |
| 1989 | 111.5 mm (4.4 in) |
| 1990 | 63.5 mm (2.5 in) |
| 1991 | 95.3 mm (3.8 in) |
| 1992 | 56.4 mm (2.2 in) |
| 1993 | 49.0 mm (1.9 in) |
| 1994 | 67.6 mm (2.7 in) |
| 1995 | 63.0 mm (2.5 in) |
| 1996 | 63.8 mm (2.5 in) |
| 1997 | 69.9 mm (2.8 in) |
| 1998 | 65.5 mm (2.6 in) |
| 1999 | 46.2 mm (1.8 in) |
| 2000 | 60.5 mm (2.4 in) |
| 2001 | 71.9 mm (2.8 in) |
| 2002 | 109.0 mm (4.3 in) |
| 2003 | 59.2 mm (2.3 in) |
| 2004 | 31.0 mm (1.2 in) |
Wettest five days (Rx5day)
| Year | Wettest five days (Rx5day) |
|---|---|
| 1957 | 130.1 mm (5.1 in) |
| 1958 | 109.2 mm (4.3 in) |
| 1959 | 118.1 mm (4.6 in) |
| 1960 | 124.0 mm (4.9 in) |
| 1961 | 95.5 mm (3.8 in) |
| 1962 | 120.2 mm (4.7 in) |
| 1963 | 89.9 mm (3.5 in) |
| 1964 | 195.8 mm (7.7 in) |
| 1965 | 67.3 mm (2.6 in) |
| 1966 | 69.6 mm (2.7 in) |
| 1967 | 113.6 mm (4.5 in) |
| 1968 | 91.9 mm (3.6 in) |
| 1969 | 117.6 mm (4.6 in) |
| 1970 | 118.6 mm (4.7 in) |
| 1971 | 88.1 mm (3.5 in) |
| 1972 | 96.6 mm (3.8 in) |
| 1973 | 141.5 mm (5.6 in) |
| 1974 | 117.9 mm (4.6 in) |
| 1975 | 175.4 mm (6.9 in) |
| 1976 | 64.7 mm (2.5 in) |
| 1977 | 91.9 mm (3.6 in) |
| 1978 | 89.9 mm (3.5 in) |
| 1979 | 85.8 mm (3.4 in) |
| 1980 | 127.3 mm (5.0 in) |
| 1981 | 90.0 mm (3.5 in) |
| 1982 | 98.1 mm (3.9 in) |
| 1983 | 82.8 mm (3.3 in) |
| 1984 | 158.3 mm (6.2 in) |
| 1985 | 95.8 mm (3.8 in) |
| 1986 | 122.1 mm (4.8 in) |
| 1987 | 68.9 mm (2.7 in) |
| 1988 | 89.9 mm (3.5 in) |
| 1989 | 143.4 mm (5.6 in) |
| 1990 | 104.4 mm (4.1 in) |
| 1991 | 167.2 mm (6.6 in) |
| 1992 | 66.1 mm (2.6 in) |
| 1993 | 79.5 mm (3.1 in) |
| 1994 | 166.9 mm (6.6 in) |
| 1995 | 87.4 mm (3.4 in) |
| 1996 | 90.4 mm (3.6 in) |
| 1997 | 131.1 mm (5.2 in) |
| 1998 | 136.4 mm (5.4 in) |
| 1999 | 70.3 mm (2.8 in) |
| 2000 | 95.5 mm (3.8 in) |
| 2001 | 80.7 mm (3.2 in) |
| 2002 | 166.4 mm (6.6 in) |
| 2003 | 170.0 mm (6.7 in) |
| 2004 | 45.0 mm (1.8 in) |
Longest dry spell (CDD)
| Year | Longest dry spell (CDD) |
|---|---|
| 1957 | 25 days |
| 1958 | 13 days |
| 1959 | 18 days |
| 1960 | 10 days |
| 1961 | 21 days |
| 1962 | 13 days |
| 1963 | 31 days |
| 1964 | 18 days |
| 1965 | 17 days |
| 1966 | 17 days |
| 1967 | 18 days |
| 1968 | 18 days |
| 1969 | 16 days |
| 1970 | 18 days |
| 1971 | 15 days |
| 1972 | 10 days |
| 1973 | 13 days |
| 1974 | 16 days |
| 1975 | 15 days |
| 1976 | 27 days |
| 1977 | 17 days |
| 1978 | 20 days |
| 1979 | 14 days |
| 1980 | 19 days |
| 1981 | 19 days |
| 1982 | 19 days |
| 1983 | 14 days |
| 1984 | 20 days |
| 1985 | 11 days |
| 1986 | 18 days |
| 1987 | 26 days |
| 1988 | 30 days |
| 1989 | 11 days |
| 1990 | 18 days |
| 1991 | 26 days |
| 1992 | 19 days |
| 1993 | 17 days |
| 1994 | 15 days |
| 1995 | 14 days |
| 1996 | 14 days |
| 1997 | 13 days |
| 1998 | 21 days |
| 1999 | 21 days |
| 2000 | 17 days |
| 2001 | 16 days |
| 2002 | 17 days |
| 2003 | 12 days |
| 2004 | 8 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
38 years with a frostAcross 38 years with a frost, the median last spring frost at Williamsburg falls on 24 April and the median first autumn frost on 19 October, which leaves a median of 178 days between them.
Fitted over all years, the growing season changes by +2.8 days per decade at this station.
| Measure | Median, all years | Earliest period | Recent period (1969 to 2003) | Recent against earliest | Fitted trend |
|---|---|---|---|---|---|
| Last spring frost | 24 April | n/a | 21 April | n/a | -3.7 days per decade |
| First autumn frost | 19 October | n/a | 18 October | n/a | -0.9 days per decade |
| Growing days | 178 days | n/a | 179 days | n/a | +2.8 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
43 years, 1958 to 2003A day with at least 62.4 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 141.5 mm (5.6 in) of rain is expected about once in 100 years.
| Expected about once in | A day with at least | Note |
|---|---|---|
| 2 years | 62.4 mm (2.5 in) | |
| 5 years | 79.5 mm (3.1 in) | |
| 10 years | 92.3 mm (3.6 in) | |
| 25 years | 110.4 mm (4.3 in) | |
| 50 years | 125.3 mm (4.9 in) | Longer than the 43 years of record |
| 100 years | 141.5 mm (5.6 in) | Longer than the 43 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, 43 years of values from 1958 to 2003.
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: 117.6 mm (4.6 in) in 1984; 111.5 mm (4.4 in) in 1989; 109.0 mm (4.3 in) in 2002.
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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).