Shearwater A Threshold Days by Year (CA008205090)

13 fixed thresholds counted per year at Shearwater A (CA008205090): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Shearwater A Thresholds

Shearwater A: days with a maximum temperature at or below 0 C (32 F) in 39 years, most in 1970 with 68.
Shearwater A: nights with a minimum temperature at or below 0 C (32 F) in 39 years, most in 1972 with 177.
Shearwater A: nights with a minimum temperature at or below -10 C (14 F) in 39 years, most in 1972 with 61.
Shearwater A: days with 10 mm (0.39 in) or more of precipitation in 39 years, most in 1953 with 59.
13 fixed thresholds have at least one qualifying day at Shearwater A.

Days at or above 30 C (86 F)

21 years with a qualifying day

Days per year at Shearwater A with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 5 in 1963.

Days at or above 30 C (86 F) per year at Shearwater A
Year	Days	Decade average
1945	2	1.3
1946	1	1.3
1947	1	1.3
1949	1	1.3
1952	2	1.7
1955	2	1.7
1957	1	1.7
1961	1	2
1963	5	2
1968	1	2
1969	1	2
1970	1	1.9
1973	2	1.9
1975	3	1.9
1976	4	1.9
1977	1	1.9
1978	1	1.9
1979	1	1.9
1980	1	1.3
1981	1	1.3
1983	2	1.3

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

First to last qualifying date each year at Shearwater A
Year	First date	Last date
1945	1945-09-07	1945-09-08
1946	1946-06-27	1946-06-27
1947	1947-08-13	1947-08-13
1949	1949-08-09	1949-08-09
1952	1952-07-08	1952-08-28
1955	1955-07-05	1955-08-22
1957	1957-06-24	1957-06-24
1961	1961-09-11	1961-09-11
1963	1963-06-25	1963-07-28
1968	1968-07-16	1968-07-16
1969	1969-09-01	1969-09-01
1970	1970-07-26	1970-07-26
1973	1973-07-09	1973-08-31
1975	1975-06-23	1975-07-19
1976	1976-06-22	1976-08-23
1977	1977-05-23	1977-05-23
1978	1978-07-21	1978-07-21
1979	1979-06-16	1979-06-16
1980	1980-08-24	1980-08-24
1981	1981-08-01	1981-08-01
1983	1983-06-22	1983-06-23

Every Fixed Threshold

Fixed thresholds at Shearwater A
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	21	5	1963	2
90 F (32.2 C): Days	5	2	1963	2
0 C (32 F): Ice days (max	39	68	1970	38
0 C (32 F): Frost days (min	39	177	1972	123
-10 C (14 F): Days with min	39	61	1972	38
-20 C (-4 F): Days with min	25	6	1972	5
20 C (68 F): Tropical nights (min	2	1	1945	1
10 mm (0.39 in): Days with 10 mm or more rain	39	59	1953	51
25 mm (0.98 in): Days with 25 mm or more rain	39	23	1948	13
50 mm (1.97 in): Days with 50 mm or more rain	32	5	1954	2
100 mm (3.94 in): Days with 100 mm or more rain	3	1	1946	1
10 cm (3.9 in): Days with 10 cm or more snowfall	38	16	1967	3
25 cm (9.8 in): Days with 25 cm or more snowfall	14	5	1960	2

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 Shearwater A 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).

Shearwater A Threshold Days by Year (CA008205090)

Key Facts for Shearwater A Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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