Brooks 1 Threshold Days by Year (CA003030840)

17 fixed thresholds counted per year at Brooks 1 (CA003030840): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Brooks 1 Thresholds

Brooks 1: days with 10 mm (0.39 in) or more of precipitation in 32 years, most in 1951 with 16.
Brooks 1: days with a maximum temperature at or above 30 C (86 F) in 29 years, most in 1945 with 36.
Brooks 1: days with a maximum temperature at or above 90 F (32.2 C) in 29 years, most in 1945 with 20.
Brooks 1: days with a maximum temperature at or below 0 C (32 F) in 29 years, most in 1951 with 111.
17 fixed thresholds have at least one qualifying day at Brooks 1.

Days at or above 30 C (86 F)

29 years with a qualifying day

Days per year at Brooks 1 with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 36 in 1945.

Days at or above 30 C (86 F) per year at Brooks 1
Year	Days	Decade average
1938	12	16.5
1939	21	16.5
1940	25	27.7
1942	26	27.7
1943	32	27.7
1944	34	27.7
1945	36	27.7
1946	29	27.7
1947	26	27.7
1948	15	27.7
1949	26	27.7
1950	19	12.2
1951	7	12.2
1952	7	12.2
1953	10	12.2
1954	7	12.2
1955	14	12.2
1956	17	12.2
1957	11	12.2
1958	19	12.2
1959	11	12.2
1960	23	17.5
1961	32	17.5
1962	10	17.5
1963	16	17.5
1964	12	17.5
1965	13	17.5
1966	7	17.5
1967	27	17.5

For each year, a bar from the first to the last day at Brooks 1 meeting 30 C (86 F).

First to last qualifying date each year at Brooks 1
Year	First date	Last date
1938	1938-06-20	1938-09-21
1939	1939-04-29	1939-08-31
1940	1940-05-10	1940-09-13
1942	1942-05-22	1942-10-06
1943	1943-07-02	1943-10-03
1944	1944-05-15	1944-09-13
1945	1945-05-30	1945-09-07
1946	1946-05-25	1946-08-23
1947	1947-07-02	1947-09-03
1948	1948-05-21	1948-09-14
1949	1949-05-11	1949-09-09
1950	1950-06-11	1950-09-24
1951	1951-07-18	1951-08-04
1952	1952-07-04	1952-09-26
1953	1953-07-12	1953-09-12
1954	1954-07-05	1954-07-26
1955	1955-07-15	1955-09-02
1956	1956-05-20	1956-08-23
1957	1957-06-04	1957-10-01
1958	1958-05-11	1958-09-07
1959	1959-07-12	1959-08-01
1960	1960-07-06	1960-09-03
1961	1961-06-03	1961-08-29
1962	1962-06-24	1962-08-20
1963	1963-06-18	1963-09-29
1964	1964-07-02	1964-08-18
1965	1965-06-10	1965-08-12
1966	1966-05-26	1966-09-18
1967	1967-07-03	1967-09-29

Every Fixed Threshold

Fixed thresholds at Brooks 1
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	29	36	1945	27
35 C (95 F): Days	13	6	1946	1
90 F (32.2 C): Days	29	20	1945	8
100 F (37.8 C): Days	3	1	1945	1
0 C (32 F): Ice days (max	29	111	1951	89
0 C (32 F): Frost days (min	27	218	1950	209
-10 C (14 F): Days with min	27	121	1951	114
-20 C (-4 F): Days with min	27	64	1951	42
-30 C (-22 F): Days with min	27	29	1950	12
-40 C (-40 F): Days with min	9	10	1950	1
20 C (68 F): Tropical nights (min	1	1	1953	1
10 mm (0.39 in): Days with 10 mm or more rain	32	16	1951	4
25 mm (0.98 in): Days with 25 mm or more rain	22	4	1951	1
50 mm (1.97 in): Days with 50 mm or more rain	8	1	1944	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1953	1
10 cm (3.9 in): Days with 10 cm or more snowfall	28	6	1951	2
25 cm (9.8 in): Days with 25 cm or more snowfall	4	2	1953	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1938.

Download the Data

Data for Brooks 1 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).

Brooks 1 Threshold Days by Year (CA003030840)

Key Facts for Brooks 1 Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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