Hawthorne AP Threshold Days by Year (USC00263515)

15 fixed thresholds counted per year at Hawthorne AP (USC00263515): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hawthorne AP Thresholds

Hawthorne AP: days with a maximum temperature at or above 30 C (86 F) in 51 years, most in 1969 with 133.
Hawthorne AP: days with a maximum temperature at or above 35 C (95 F) in 51 years, most in 1967 with 80.
Hawthorne AP: days with a maximum temperature at or above 90 F (32.2 C) in 51 years, most in 1969 with 109.
Hawthorne AP: nights with a minimum temperature at or below 0 C (32 F) in 51 years, most in 1960 with 163.
15 fixed thresholds have at least one qualifying day at Hawthorne AP.

Days at or above 30 C (86 F)

51 years with a qualifying day

Days per year at Hawthorne AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 133 in 1969.

Days at or above 30 C (86 F) per year at Hawthorne AP
Year	Days	Decade average
1891	69	65.7
1892	79	65.7
1893	58	65.7
1894	52	65.7
1895	58	65.7
1896	64	65.7
1897	65	65.7
1898	80	65.7
1899	66	65.7
1900	61	69.5
1901	64	69.5
1903	63	69.5
1904	90	69.5
1938	78	81
1939	84	81
1940	99	84.9
1941	63	84.9
1943	84	84.9
1944	69	84.9
1945	71	84.9
1946	89	84.9
1947	96	84.9
1948	90	84.9
1949	103	84.9
1950	88	90
1959	92	90
1960	111	119.3
1967	121	119.3
1968	112	119.3
1969	133	119.3
1970	108	94.4
1971	100	94.4
1972	98	94.4
1973	116	94.4
1974	110	94.4
1975	85	94.4
1976	61	94.4
1977	92	94.4
1978	73	94.4
1979	101	94.4
1980	93	90.2
1981	107	90.2
1982	71	90.2
1983	71	90.2
1984	94	90.2
1985	81	90.2
1986	91	90.2
1987	109	90.2
1988	97	90.2
1989	88	90.2
1990	89	89

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

First to last qualifying date each year at Hawthorne AP
Year	First date	Last date
1891	1891-06-05	1891-09-13
1892	1892-05-22	1892-09-28
1893	1893-06-05	1893-09-05
1894	1894-05-24	1894-09-25
1895	1895-05-07	1895-09-08
1896	1896-05-26	1896-09-15
1897	1897-05-22	1897-09-20
1898	1898-04-25	1898-09-20
1899	1899-06-10	1899-09-29
1900	1900-06-06	1900-09-02
1901	1901-06-21	1901-09-20
1903	1903-05-31	1903-09-10
1904	1904-04-11	1904-09-14
1938	1938-05-14	1938-09-23
1939	1939-05-28	1939-09-20
1940	1940-05-01	1940-09-26
1941	1941-05-10	1941-09-10
1943	1943-05-25	1943-10-01
1944	1944-06-28	1944-09-16
1945	1945-06-12	1945-09-15
1946	1946-04-24	1946-09-30
1947	1947-05-01	1947-10-06
1948	1948-05-15	1948-10-02
1949	1949-04-23	1949-10-04
1950	1950-04-20	1950-10-10
1959	1959-04-29	1959-09-13
1960	1960-05-08	1960-09-27
1967	1967-05-08	1967-10-13
1968	1968-04-29	1968-10-05
1969	1969-04-17	1969-10-01
1970	1970-05-03	1970-10-05
1971	1971-05-15	1971-10-06
1972	1972-04-28	1972-09-17
1973	1973-05-11	1973-10-14
1974	1974-05-06	1974-09-26
1975	1975-05-14	1975-10-05
1976	1976-05-02	1976-09-10
1977	1977-05-30	1977-09-13
1978	1978-05-14	1978-10-01
1979	1979-05-14	1979-10-06
1980	1980-04-20	1980-10-09
1981	1981-04-30	1981-09-21
1982	1982-05-26	1982-09-09
1983	1983-05-21	1983-09-18
1984	1984-04-15	1984-09-19
1985	1985-04-14	1985-08-30
1986	1986-05-18	1986-09-11
1987	1987-04-22	1987-10-04
1988	1988-05-11	1988-10-03
1989	1989-04-07	1989-09-26
1990	1990-05-05	1990-10-04

Every Fixed Threshold

Fixed thresholds at Hawthorne AP
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	51	133	1969	89
35 C (95 F): Days	51	80	1967	49
40 C (104 F): Days	17	18	1969	2
90 F (32.2 C): Days	51	109	1969	72
100 F (37.8 C): Days	43	41	1967	15
110 F (43.3 C): Days	1	1	1969	1
0 C (32 F): Ice days (max	41	31	1949	7
0 C (32 F): Frost days (min	51	163	1960	110
-10 C (14 F): Days with min	46	42	1949	10
-20 C (-4 F): Days with min	6	2	1989	2
20 C (68 F): Tropical nights (min	40	9	1904	6
25 C (77 F): Days with min	2	2	1901	2
10 mm (0.39 in): Days with 10 mm or more rain	43	8	1969	3
25 mm (0.98 in): Days with 25 mm or more rain	11	1	1904	1
10 cm (3.9 in): Days with 10 cm or more snowfall	5	2	1945	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1891.

Download the Data

Data for Hawthorne AP 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).

Hawthorne AP Threshold Days by Year (USC00263515)

Key Facts for Hawthorne AP Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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