Norfolk NAS Threshold Days by Year (USW00013750)

17 fixed thresholds counted per year at Norfolk NAS (USW00013750): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Norfolk NAS Thresholds

Norfolk NAS: days with a maximum temperature at or above 30 C (86 F) in 77 years, most in 2007 with 104.
Norfolk NAS: days with a maximum temperature at or above 90 F (32.2 C) in 77 years, most in 2010 with 69.
Norfolk NAS: nights with a minimum temperature at or below 0 C (32 F) in 76 years, most in 1963 with 71.
Norfolk NAS: nights with a minimum temperature at or above 20 C (68 F) in 76 years, most in 1959 with 131.
17 fixed thresholds have at least one qualifying day at Norfolk NAS.

Days at or above 30 C (86 F)

77 years with a qualifying day

Days per year at Norfolk NAS with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 104 in 2007.

Days at or above 30 C (86 F) per year at Norfolk NAS
Year	Days	Decade average
1945	56	53.2
1946	38	53.2
1947	55	53.2
1948	57	53.2
1949	60	53.2
1950	43	65.2
1951	55	65.2
1952	79	65.2
1953	69	65.2
1954	70	65.2
1955	55	65.2
1956	68	65.2
1957	73	65.2
1958	56	65.2
1959	84	65.2
1960	56	53.1
1961	57	53.1
1962	54	53.1
1963	55	53.1
1964	46	53.1
1965	73	53.1
1966	48	53.1
1967	36	53.1
1968	55	53.1
1969	51	53.1
1970	70	57
1971	54	57
1972	52	57
1973	61	57
1974	36	57
1975	66	57
1976	55	57
1977	72	57
1978	54	57
1979	50	57
1980	72	61.7
1981	61	61.7
1982	49	61.7
1984	46	61.7
1985	57	61.7
1986	73	61.7
1987	75	61.7
1988	55	61.7
1989	67	61.7
1990	81	68.6
1991	83	68.6
1992	57	68.6
1993	87	68.6
1994	89	68.6
1995	77	68.6
1996	47	68.6
1997	45	68.6
1998	51	68.6
2001	46	71.6
2002	71	71.6
2003	56	71.6
2005	71	71.6
2007	104	71.6
2008	76	71.6
2009	77	71.6
2010	102	81.1
2011	98	81.1
2012	79	81.1
2013	72	81.1
2014	54	81.1
2015	74	81.1
2016	82	81.1
2017	82	81.1
2018	85	81.1
2019	83	81.1
2020	77	70
2021	79	70
2022	78	70
2023	70	70
2024	60	70
2025	59	70
2026	67	70

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

First to last qualifying date each year at Norfolk NAS
Year	First date	Last date
1945	1945-03-17	1945-09-29
1946	1946-04-20	1946-09-10
1947	1947-05-01	1947-09-22
1948	1948-03-21	1948-09-20
1949	1949-04-15	1949-09-19
1950	1950-05-06	1950-09-21
1951	1951-04-26	1951-10-07
1952	1952-04-20	1952-10-02
1953	1953-04-25	1953-09-30
1954	1954-04-08	1954-10-13
1955	1955-04-19	1955-09-30
1956	1956-04-30	1956-09-23
1957	1957-04-20	1957-09-22
1958	1958-04-20	1958-10-10
1959	1959-05-02	1959-10-07
1960	1960-04-23	1960-09-20
1961	1961-04-25	1961-09-25
1962	1962-04-26	1962-09-14
1963	1963-04-03	1963-09-12
1964	1964-05-08	1964-09-29
1965	1965-04-18	1965-09-24
1966	1966-05-21	1966-09-21
1967	1967-04-02	1967-08-27
1968	1968-03-21	1968-10-03
1969	1969-04-27	1969-09-07
1970	1970-04-21	1970-10-03
1971	1971-06-06	1971-09-20
1972	1972-04-15	1972-09-27
1973	1973-05-28	1973-10-05
1974	1974-04-29	1974-09-13
1975	1975-04-19	1975-09-25
1976	1976-04-16	1976-09-09
1977	1977-04-12	1977-10-02
1978	1978-05-24	1978-09-22
1979	1979-06-07	1979-09-14
1980	1980-05-05	1980-10-09
1981	1981-04-12	1981-10-06
1982	1982-05-12	1982-09-18
1984	1984-05-08	1984-10-28
1985	1985-03-29	1985-10-15
1986	1986-05-01	1986-10-04
1987	1987-05-02	1987-09-18
1988	1988-05-30	1988-09-23
1989	1989-05-21	1989-09-22
1990	1990-03-12	1990-10-11
1991	1991-04-07	1991-09-19
1992	1992-04-10	1992-09-27
1993	1993-05-11	1993-09-27
1994	1994-04-19	1994-10-09
1995	1995-04-09	1995-10-14
1996	1996-04-22	1996-09-10
1997	1997-05-18	1997-10-05
1998	1998-03-30	1998-10-01
2001	2001-04-09	2001-09-24
2002	2002-04-16	2002-10-05
2003	2003-05-11	2003-09-19
2005	2005-04-20	2005-09-26
2007	2007-03-27	2007-10-24
2008	2008-04-26	2008-10-16
2009	2009-04-25	2009-10-09
2010	2010-04-05	2010-10-27
2011	2011-04-20	2011-09-28
2012	2012-03-15	2012-10-03
2013	2013-04-09	2013-10-07
2014	2014-05-08	2014-09-11
2015	2015-04-10	2015-09-12
2016	2016-04-19	2016-10-19
2017	2017-04-16	2017-10-11
2018	2018-05-02	2018-10-11
2019	2019-04-30	2019-10-02
2020	2020-03-20	2020-09-04
2021	2021-04-28	2021-10-16
2022	2022-04-24	2022-09-25
2023	2023-04-05	2023-09-12
2024	2024-04-15	2024-09-28
2025	2025-04-03	2025-09-25
2026	2026-03-11	2026-10-02

Every Fixed Threshold

Fixed thresholds at Norfolk NAS
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	77	104	2007	67
35 C (95 F): Days	74	27	1993	7
40 C (104 F): Days	3	2	2010	1
90 F (32.2 C): Days	77	69	2010	38
100 F (37.8 C): Days	22	4	1980	1
0 C (32 F): Ice days (max	64	16	1977	7
0 C (32 F): Frost days (min	76	71	1963	38
-10 C (14 F): Days with min	16	5	1994	2
20 C (68 F): Tropical nights (min	76	131	1959	86
25 C (77 F): Days with min	74	43	1959	9
10 mm (0.39 in): Days with 10 mm or more rain	76	49	1979	22
25 mm (0.98 in): Days with 25 mm or more rain	76	22	1979	3
50 mm (1.97 in): Days with 50 mm or more rain	71	7	1947	1
100 mm (3.94 in): Days with 100 mm or more rain	17	3	1998	1
200 mm (7.87 in): Days with 200 mm or more rain	3	1	1979	1
10 cm (3.9 in): Days with 10 cm or more snowfall	16	6	1980	1
25 cm (9.8 in): Days with 25 cm or more snowfall	2	1	1980	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1945.

Download the Data

Data for Norfolk NAS 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Norfolk NAS Threshold Days by Year (USW00013750)

Key Facts for Norfolk NAS Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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