Williamsburg 2 NW Threshold Days by Year (USC00449146)

14 fixed thresholds counted per year at Williamsburg 2 NW (USC00449146): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Williamsburg 2 NW Thresholds

Williamsburg 2 NW: nights with a minimum temperature at or below 0 C (32 F) in 39 years, most in 1944 with 111.
Williamsburg 2 NW: nights with a minimum temperature at or above 20 C (68 F) in 39 years, most in 1917 with 75.
Williamsburg 2 NW: days with a maximum temperature at or above 30 C (86 F) in 37 years, most in 1941 with 111.
Williamsburg 2 NW: days with a maximum temperature at or above 90 F (32.2 C) in 37 years, most in 1941 with 67.
14 fixed thresholds have at least one qualifying day at Williamsburg 2 NW.

Days at or above 30 C (86 F)

37 years with a qualifying day

Days per year at Williamsburg 2 NW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 111 in 1941.

Days at or above 30 C (86 F) per year at Williamsburg 2 NW
Year	Days	Decade average
1901	46	47
1902	22	47
1903	36	47
1905	39	47
1906	66	47
1907	66	47
1908	54	47
1909	47	47
1910	67	59
1911	92	59
1913	64	59
1917	37	59
1918	35	59
1920	63	73
1921	92	73
1922	71	73
1923	68	73
1928	71	73
1931	90	90.4
1932	80	90.4
1933	93	90.4
1934	83	90.4
1936	96	90.4
1937	88	90.4
1938	86	90.4
1939	107	90.4
1940	63	74.6
1941	111	74.6
1942	85	74.6
1943	98	74.6
1944	93	74.6
1945	87	74.6
1946	48	74.6
1947	63	74.6
1948	49	74.6
1949	49	74.6
1950	47	47

For each year, a bar from the first to the last day at Williamsburg 2 NW meeting 30 C (86 F).

First to last qualifying date each year at Williamsburg 2 NW
Year	First date	Last date
1901	1901-05-01	1901-09-15
1902	1902-05-03	1902-09-08
1903	1903-05-19	1903-09-16
1905	1905-06-06	1905-10-01
1906	1906-04-30	1906-09-30
1907	1907-03-22	1907-09-24
1908	1908-04-24	1908-09-28
1909	1909-04-18	1909-10-23
1910	1910-03-30	1910-10-16
1911	1911-05-12	1911-09-29
1913	1913-05-02	1913-09-08
1917	1917-04-19	1917-09-02
1918	1918-05-06	1918-08-31
1920	1920-04-22	1920-10-22
1921	1921-03-16	1921-09-30
1922	1922-04-08	1922-10-28
1923	1923-05-15	1923-09-24
1928	1928-05-04	1928-10-18
1931	1931-05-29	1931-10-15
1932	1932-05-07	1932-09-23
1933	1933-05-10	1933-10-01
1934	1934-05-05	1934-09-29
1936	1936-04-15	1936-10-21
1937	1937-04-18	1937-10-07
1938	1938-04-15	1938-10-18
1939	1939-04-25	1939-10-11
1940	1940-05-07	1940-09-25
1941	1941-04-14	1941-10-16
1942	1942-04-25	1942-09-20
1943	1943-04-28	1943-09-17
1944	1944-04-10	1944-10-07
1945	1945-03-16	1945-09-30
1946	1946-04-20	1946-09-23
1947	1947-05-01	1947-09-15
1948	1948-03-21	1948-09-20
1949	1949-04-15	1949-09-06
1950	1950-05-06	1950-09-04

Every Fixed Threshold

Fixed thresholds at Williamsburg 2 NW
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	37	111	1941	47
35 C (95 F): Days	36	19	1941	3
90 F (32.2 C): Days	37	67	1941	19
100 F (37.8 C): Days	7	4	1942	1
0 C (32 F): Ice days (max	25	13	1917	9
0 C (32 F): Frost days (min	39	111	1944	64
-10 C (14 F): Days with min	32	12	1936	4
20 C (68 F): Tropical nights (min	39	75	1917	35
25 C (77 F): Days with min	17	4	1903	1
10 mm (0.39 in): Days with 10 mm or more rain	29	67	1906	26
25 mm (0.98 in): Days with 25 mm or more rain	29	21	1907	7
50 mm (1.97 in): Days with 50 mm or more rain	25	5	1918	2
100 mm (3.94 in): Days with 100 mm or more rain	5	2	1938	2
10 cm (3.9 in): Days with 10 cm or more snowfall	6	2	1918	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1901.

Download the Data

Data for Williamsburg 2 NW 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 2 NW Threshold Days by Year (USC00449146)

Key Facts for Williamsburg 2 NW Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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