Langley AFB Threshold Days by Year (USW00013702)

16 fixed thresholds counted per year at Langley AFB (USW00013702): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Langley AFB Thresholds

Langley AFB: days with 10 mm (0.39 in) or more of precipitation in 73 years, most in 1975 with 50.
Langley AFB: days with 25 mm (0.98 in) or more of precipitation in 73 years, most in 1979 with 24.
Langley AFB: days with a maximum temperature at or above 30 C (86 F) in 67 years, most in 1939 with 79.
Langley AFB: nights with a minimum temperature at or below 0 C (32 F) in 67 years, most in 1968 with 78.
16 fixed thresholds have at least one qualifying day at Langley AFB.

Days at or above 30 C (86 F)

67 years with a qualifying day

Days per year at Langley AFB with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 79 in 1939.

Days at or above 30 C (86 F) per year at Langley AFB
Year	Days	Decade average
1920	28	46
1921	61	46
1924	49	46
1934	65	62.7
1935	47	62.7
1936	64	62.7
1937	59	62.7
1938	62	62.7
1939	79	62.7
1940	41	59.4
1941	76	59.4
1942	69	59.4
1943	77	59.4
1944	65	59.4
1946	31	59.4
1947	56	59.4
1948	61	59.4
1949	59	59.4
1950	41	62.4
1951	54	62.4
1952	73	62.4
1953	63	62.4
1954	71	62.4
1955	62	62.4
1956	64	62.4
1957	67	62.4
1958	58	62.4
1959	71	62.4
1960	49	40.9
1961	48	40.9
1962	30	40.9
1963	41	40.9
1964	36	40.9
1965	46	40.9
1966	33	40.9
1967	27	40.9
1968	46	40.9
1969	53	40.9
1970	47	43.3
1971	39	43.3
1972	17	43.3
1974	35	43.3
1975	33	43.3
1976	42	43.3
1977	70	43.3
1978	64	43.3
1979	43	43.3
1981	62	60.3
1982	24	60.3
1983	72	60.3
1984	62	60.3
1986	71	60.3
1987	71	60.3
1988	60	60.3
1990	62	53.9
1991	48	53.9
1992	34	53.9
1993	70	53.9
1994	70	53.9
1996	40	53.9
1997	49	53.9
1998	57	53.9
1999	55	53.9
2001	43	54.5
2002	66	54.5
2025	60	70
2026	80	70

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

First to last qualifying date each year at Langley AFB
Year	First date	Last date
1920	1920-06-11	1920-08-31
1921	1921-03-21	1921-09-30
1924	1924-06-06	1924-09-14
1934	1934-05-06	1934-09-27
1935	1935-03-21	1935-09-22
1936	1936-04-15	1936-09-28
1937	1937-04-18	1937-09-05
1938	1938-04-29	1938-09-15
1939	1939-04-25	1939-10-10
1940	1940-05-07	1940-09-25
1941	1941-04-14	1941-10-08
1942	1942-04-05	1942-09-20
1943	1943-04-28	1943-09-16
1944	1944-05-16	1944-09-21
1946	1946-04-20	1946-09-10
1947	1947-05-13	1947-09-22
1948	1948-03-21	1948-09-20
1949	1949-04-15	1949-09-19
1950	1950-05-06	1950-09-10
1951	1951-04-26	1951-10-07
1952	1952-04-20	1952-10-02
1953	1953-05-13	1953-09-15
1954	1954-04-08	1954-10-13
1955	1955-04-19	1955-09-20
1956	1956-04-30	1956-09-23
1957	1957-04-21	1957-09-22
1958	1958-05-04	1958-10-10
1959	1959-04-08	1959-10-06
1960	1960-04-14	1960-09-20
1961	1961-04-25	1961-09-25
1962	1962-05-19	1962-09-14
1963	1963-04-02	1963-10-08
1964	1964-05-08	1964-09-11
1965	1965-05-03	1965-09-23
1966	1966-06-07	1966-09-04
1967	1967-04-02	1967-08-27
1968	1968-05-24	1968-10-03
1969	1969-05-29	1969-09-07
1970	1970-05-09	1970-09-27
1971	1971-05-19	1971-09-17
1972	1972-06-03	1972-09-27
1974	1974-04-29	1974-09-29
1975	1975-05-27	1975-09-24
1976	1976-04-16	1976-09-09
1977	1977-04-13	1977-10-02
1978	1978-05-20	1978-09-22
1979	1979-06-01	1979-09-06
1981	1981-04-28	1981-10-01
1982	1982-05-12	1982-09-18
1983	1983-04-28	1983-10-04
1984	1984-05-08	1984-10-28
1986	1986-05-01	1986-10-04
1987	1987-05-18	1987-09-18
1988	1988-05-23	1988-09-23
1990	1990-03-12	1990-10-09
1991	1991-06-01	1991-09-19
1992	1992-05-23	1992-09-22
1993	1993-05-11	1993-09-26
1994	1994-04-15	1994-09-17
1996	1996-04-22	1996-09-10
1997	1997-05-18	1997-10-06
1998	1998-05-16	1998-10-01
1999	1999-04-22	1999-09-08
2001	2001-05-04	2001-10-25
2002	2002-04-16	2002-10-05
2025	2025-04-06	2025-09-25
2026	2026-03-11	2026-10-02

Every Fixed Threshold

Fixed thresholds at Langley AFB
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	67	79	1939	80
35 C (95 F): Days	57	18	1983	9
40 C (104 F): Days	1	0	n/a	3
90 F (32.2 C): Days	66	48	1943	44
100 F (37.8 C): Days	10	4	1952	3
0 C (32 F): Ice days (max	61	15	1963	6
0 C (32 F): Frost days (min	67	78	1968	31
-10 C (14 F): Days with min	36	9	1934	1
20 C (68 F): Tropical nights (min	67	110	1959	102
25 C (77 F): Days with min	59	23	1955	25
10 mm (0.39 in): Days with 10 mm or more rain	73	50	1975	12
25 mm (0.98 in): Days with 25 mm or more rain	73	24	1979	3
50 mm (1.97 in): Days with 50 mm or more rain	62	8	1979	2
100 mm (3.94 in): Days with 100 mm or more rain	12	2	1963	2
10 cm (3.9 in): Days with 10 cm or more snowfall	25	3	1948	1
25 cm (9.8 in): Days with 25 cm or more snowfall	2	1	1958	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1920.

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Data for Langley AFB 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).

Langley AFB Threshold Days by Year (USW00013702)

Key Facts for Langley AFB Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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