Norfolk Threshold Days by Year (USC00255990)

19 fixed thresholds counted per year at Norfolk (USC00255990): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Norfolk Thresholds

Norfolk: days with 10 mm (0.39 in) or more of precipitation in 67 years, most in 1923 with 34.
Norfolk: days with 25 mm (0.98 in) or more of precipitation in 67 years, most in 1902 with 12.
Norfolk: days with a maximum temperature at or above 30 C (86 F) in 48 years, most in 1936 with 95.
Norfolk: days with a maximum temperature at or above 90 F (32.2 C) in 48 years, most in 1936 with 76.
19 fixed thresholds have at least one qualifying day at Norfolk.

Days at or above 30 C (86 F)

48 years with a qualifying day

Days per year at Norfolk with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 95 in 1936.

Days at or above 30 C (86 F) per year at Norfolk
Year	Days	Decade average
1894	64	45.6
1896	21	45.6
1897	44	45.6
1898	47	45.6
1899	52	45.6
1900	69	54.9
1901	72	54.9
1902	38	54.9
1903	40	54.9
1905	50	54.9
1906	54	54.9
1907	55	54.9
1908	61	54.9
1909	55	54.9
1910	66	66.6
1911	81	66.6
1912	60	66.6
1913	85	66.6
1914	70	66.6
1915	37	66.6
1916	69	66.6
1917	49	66.6
1918	80	66.6
1919	69	66.6
1920	53	60.2
1921	81	60.2
1922	70	60.2
1923	48	60.2
1924	35	60.2
1925	67	60.2
1926	70	60.2
1927	57	60.2
1928	58	60.2
1929	63	60.2
1930	66	76.1
1931	86	76.1
1932	51	76.1
1933	77	76.1
1934	87	76.1
1935	64	76.1
1936	95	76.1
1937	77	76.1
1938	82	76.1
1940	59	60.4
1941	62	60.4
1942	57	60.4
1943	71	60.4
1944	53	60.4

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

First to last qualifying date each year at Norfolk
Year	First date	Last date
1894	1894-05-14	1894-09-28
1896	1896-06-16	1896-09-08
1897	1897-06-09	1897-09-30
1898	1898-04-17	1898-09-24
1899	1899-04-13	1899-10-22
1900	1900-05-12	1900-10-06
1901	1901-04-27	1901-09-22
1902	1902-04-20	1902-09-07
1903	1903-06-07	1903-10-19
1905	1905-05-01	1905-10-07
1906	1906-04-24	1906-09-25
1907	1907-03-21	1907-09-19
1908	1908-04-13	1908-10-16
1909	1909-05-04	1909-10-06
1910	1910-03-21	1910-10-16
1911	1911-05-08	1911-09-28
1912	1912-05-19	1912-10-05
1913	1913-04-16	1913-09-10
1914	1914-05-10	1914-09-18
1915	1915-05-10	1915-09-16
1916	1916-04-11	1916-10-07
1917	1917-05-16	1917-08-31
1918	1918-05-02	1918-10-14
1919	1919-05-30	1919-09-24
1920	1920-05-22	1920-10-10
1921	1921-04-02	1921-10-17
1922	1922-05-05	1922-10-27
1923	1923-04-19	1923-09-26
1924	1924-04-14	1924-08-29
1925	1925-05-19	1925-09-19
1926	1926-04-20	1926-09-17
1927	1927-04-26	1927-10-26
1928	1928-03-23	1928-10-10
1929	1929-04-04	1929-09-25
1930	1930-04-04	1930-09-23
1931	1931-04-08	1931-09-20
1932	1932-05-12	1932-10-02
1933	1933-05-16	1933-09-24
1934	1934-04-29	1934-10-11
1935	1935-03-15	1935-09-24
1936	1936-04-13	1936-09-22
1937	1937-04-22	1937-09-22
1938	1938-05-26	1938-10-16
1940	1940-04-14	1940-09-23
1941	1941-05-15	1941-09-21
1942	1942-04-30	1942-10-08
1943	1943-03-31	1943-10-11
1944	1944-05-14	1944-09-21

Every Fixed Threshold

Fixed thresholds at Norfolk
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	48	95	1936	53
35 C (95 F): Days	47	50	1936	10
40 C (104 F): Days	15	25	1936	3
45 C (113 F): Days	2	2	1936	2
90 F (32.2 C): Days	48	76	1936	32
100 F (37.8 C): Days	36	36	1936	1
110 F (43.3 C): Days	3	7	1936	7
0 C (32 F): Ice days (max	48	72	1937	56
0 C (32 F): Frost days (min	46	181	1907	155
-10 C (14 F): Days with min	46	77	1899	47
-20 C (-4 F): Days with min	46	38	1936	8
-30 C (-22 F): Days with min	26	10	1936	1
20 C (68 F): Tropical nights (min	46	45	1936	14
25 C (77 F): Days with min	10	7	1936	2
10 mm (0.39 in): Days with 10 mm or more rain	67	34	1923	19
25 mm (0.98 in): Days with 25 mm or more rain	67	12	1902	3
50 mm (1.97 in): Days with 50 mm or more rain	45	5	1905	1
100 mm (3.94 in): Days with 100 mm or more rain	3	1	1908	1
10 cm (3.9 in): Days with 10 cm or more snowfall	14	4	1924	4

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1894.

Download the Data

Data for Norfolk 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).

Norfolk Threshold Days by Year (USC00255990)

Key Facts for Norfolk Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related