Williamsburg Threshold Days by Year (USC00158709)

15 fixed thresholds counted per year at Williamsburg (USC00158709): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Williamsburg Thresholds

Williamsburg: days with a maximum temperature at or above 30 C (86 F) in 43 years, most in 1960 with 105.
Williamsburg: days with a maximum temperature at or below 0 C (32 F) in 43 years, most in 1996 with 31.
Williamsburg: days with 10 mm (0.39 in) or more of precipitation in 43 years, most in 1974 with 57.
Williamsburg: days with 25 mm (0.98 in) or more of precipitation in 43 years, most in 1994 with 21.
15 fixed thresholds have at least one qualifying day at Williamsburg.

Days at or above 30 C (86 F)

43 years with a qualifying day

Days per year at Williamsburg with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 105 in 1960.

Days at or above 30 C (86 F) per year at Williamsburg
Year	Days	Decade average
1958	88	95.5
1959	103	95.5
1960	105	71.6
1961	79	71.6
1962	105	71.6
1963	57	71.6
1964	63	71.6
1966	57	71.6
1967	28	71.6
1969	79	71.6
1970	68	48.7
1971	39	48.7
1973	50	48.7
1974	40	48.7
1975	48	48.7
1976	30	48.7
1977	72	48.7
1978	69	48.7
1979	22	48.7
1980	70	62.7
1981	35	62.7
1982	39	62.7
1983	70	62.7
1984	54	62.7
1985	53	62.7
1986	76	62.7
1987	96	62.7
1988	81	62.7
1989	53	62.7
1990	70	64.5
1991	85	64.5
1992	44	64.5
1993	88	64.5
1994	69	64.5
1995	94	64.5
1996	43	64.5
1997	29	64.5
1998	64	64.5
1999	59	64.5
2000	31	37.5
2001	38	37.5
2002	65	37.5
2003	16	37.5

For each year, a bar from the first to the last day at Williamsburg meeting 30 C (86 F).

First to last qualifying date each year at Williamsburg
Year	First date	Last date
1958	1958-05-04	1958-09-27
1959	1959-04-08	1959-10-06
1960	1960-04-14	1960-10-03
1961	1961-04-25	1961-10-13
1962	1962-04-27	1962-10-16
1963	1963-03-31	1963-09-22
1964	1964-04-20	1964-09-28
1966	1966-05-08	1966-09-04
1967	1967-04-06	1967-09-20
1969	1969-05-05	1969-10-13
1970	1970-04-19	1970-09-26
1971	1971-04-19	1971-09-30
1973	1973-04-22	1973-09-09
1974	1974-04-02	1974-08-28
1975	1975-05-22	1975-10-14
1976	1976-04-20	1976-08-26
1977	1977-04-19	1977-09-07
1978	1978-04-02	1978-09-21
1979	1979-05-08	1979-08-22
1980	1980-05-19	1980-09-17
1981	1981-04-14	1981-09-06
1982	1982-03-19	1982-08-17
1983	1983-05-08	1983-09-20
1984	1984-04-27	1984-09-22
1985	1985-04-20	1985-08-20
1986	1986-04-26	1986-09-30
1987	1987-04-22	1987-09-18
1988	1988-04-06	1988-09-24
1989	1989-04-26	1989-09-22
1990	1990-04-25	1990-08-29
1991	1991-03-28	1991-09-19
1992	1992-04-11	1992-09-22
1993	1993-04-15	1993-09-16
1994	1994-04-15	1994-10-02
1995	1995-04-11	1995-09-16
1996	1996-05-18	1996-09-08
1997	1997-06-21	1997-09-03
1998	1998-05-14	1998-09-28
1999	1999-05-12	1999-09-29
2000	2000-05-09	2000-09-01
2001	2001-04-09	2001-08-30
2002	2002-04-17	2002-09-14
2003	2003-05-10	2003-08-31

Every Fixed Threshold

Fixed thresholds at Williamsburg
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	43	105	1960	16
35 C (95 F): Days	21	21	1988	3
90 F (32.2 C): Days	42	59	1959	24
100 F (37.8 C): Days	3	6	1988	6
0 C (32 F): Ice days (max	43	31	1996	15
0 C (32 F): Frost days (min	41	145	1995	101
-10 C (14 F): Days with min	41	43	1977	13
-20 C (-4 F): Days with min	17	5	1962	3
20 C (68 F): Tropical nights (min	40	38	1980	4
25 C (77 F): Days with min	1	1	1979	1
10 mm (0.39 in): Days with 10 mm or more rain	43	57	1974	53
25 mm (0.98 in): Days with 25 mm or more rain	43	21	1994	18
50 mm (1.97 in): Days with 50 mm or more rain	36	5	1995	5
100 mm (3.94 in): Days with 100 mm or more rain	4	1	1964	1
10 cm (3.9 in): Days with 10 cm or more snowfall	18	3	1966	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1958.

Download the Data

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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Williamsburg Threshold Days by Year (USC00158709)

Key Facts for Williamsburg Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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