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
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Williamsburg. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Williamsburg, with 2026 drawn through them
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 with most
1,464 records at Williamsburg still stand. 1962 holds the most, with 59.
Standing records at Williamsburg by the year they were set
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
3 all-time records were set at Williamsburg between 9 July 1988 and 19 January 1994. Each dot is a new record.
When Williamsburg set new all-time 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)
The wettest day on record for each calendar month at Williamsburg. The most was 117.6 mm (4.6 in) on 7 May 1984.
Record daily precipitation for each month at Williamsburg
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
Complete yearUnder 90 percent of days
48 years of record at Williamsburg, 1957 to 2004. 5 years have data for under 90 percent of days and are left out of rankings: 1957, 1965, 1968, 1972, 2004.
Cooler than the station meanWarmer than the station mean
One stripe for each of 38 complete years at Williamsburg, 1958 to 2003. Blue stripes are years cooler than the station's own mean of 13.1 C (55.6 F); red stripes are warmer. The coolest year was 1996, at 10.7 C (51.3 F), and the warmest was 1991, at 14.5 C (58.1 F). The strongest colour marks a difference of 2.4 C (4.3 F).
Annual mean temperature at Williamsburg as warming stripes, 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.
Fitted temperature trends per decade at Williamsburg
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
Yearly extremes at Williamsburg: the record and the median year
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)
The hottest day of the year at Williamsburg, 1957 to 2004. The record is 39.4 C (102.9 F) in 1988, marked on the chart; the median year is 35.0 C (95.0 F).
Hottest day (TXx) at Williamsburg by year
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)
The coldest night of the year at Williamsburg, 1957 to 2004. The record is -29.4 C (-20.9 F) in 1994, marked on the chart; the median year is -18.0 C (-0.5 F).
Coldest night (TNn) at Williamsburg by year
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)
The wettest day of the year at Williamsburg, 1957 to 2004. The record is 117.6 mm (4.6 in) in 1984, marked on the chart; the median year is 61.1 mm (2.4 in).
Wettest day (Rx1day) at Williamsburg by year
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)
The wettest five days of the year at Williamsburg, 1957 to 2004. The record is 195.8 mm (7.7 in) in 1964, marked on the chart; the median year is 97.4 mm (3.8 in).
Wettest five days (Rx5day) at Williamsburg by year
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)
The longest dry spell of the year at Williamsburg, 1957 to 2004. The record is 31 days in 1963, marked on the chart; the median year is 17 days.
Longest dry spell (CDD) at Williamsburg by year
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 frost
Across 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.
Frost dates and growing season at Williamsburg
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 2003
A 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.
Rainfall return levels at Williamsburg: the daily rain expected about once in a given number of 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.
Download the Data
Data for Williamsburg standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Williamsburg threshold days by year: CSV or JSON. Field meanings are on the data page.
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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.