Heron 2 NW Threshold Days by Year (USC00244084)

17 fixed thresholds counted per year at Heron 2 NW (USC00244084): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Heron 2 NW Thresholds

Heron 2 NW: days with a maximum temperature at or above 30 C (86 F) in 103 years, most in 1922 with 65.
Heron 2 NW: days with a maximum temperature at or below 0 C (32 F) in 103 years, most in 1985 with 74.
Heron 2 NW: days with 10 mm (0.39 in) or more of precipitation in 103 years, most in 1933 with 47.
Heron 2 NW: days with a maximum temperature at or above 90 F (32.2 C) in 101 years, most in 1925 with 38.
17 fixed thresholds have at least one qualifying day at Heron 2 NW.

Days at or above 30 C (86 F)

103 years with a qualifying day

Days per year at Heron 2 NW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 65 in 1922.

Days at or above 30 C (86 F) per year at Heron 2 NW
Year	Days	Decade average
1913	27	37
1914	35	37
1915	31	37
1916	31	37
1917	43	37
1918	43	37
1919	49	37
1920	49	48.2
1921	42	48.2
1922	65	48.2
1924	53	48.2
1925	55	48.2
1926	51	48.2
1927	44	48.2
1928	43	48.2
1929	32	48.2
1930	30	36
1931	40	36
1932	28	36
1933	32	36
1934	44	36
1935	28	36
1936	46	36
1937	27	36
1938	49	36
1940	41	30.2
1941	24	30.2
1942	27	30.2
1943	21	30.2
1944	21	30.2
1945	43	30.2
1946	34	30.2
1947	29	30.2
1948	18	30.2
1949	44	30.2
1950	38	27.1
1951	35	27.1
1952	25	27.1
1953	21	27.1
1954	7	27.1
1955	24	27.1
1956	29	27.1
1957	14	27.1
1958	54	27.1
1959	24	27.1
1960	28	27.2
1961	47	27.2
1962	20	27.2
1963	25	27.2
1964	14	27.2
1965	24	27.2
1966	24	27.2
1967	47	27.2
1968	18	27.2
1969	25	27.2
1970	35	27.3
1971	34	27.3
1972	22	27.3
1973	38	27.3
1974	24	27.3
1975	21	27.3
1976	7	27.3
1977	32	27.3
1978	23	27.3
1979	37	27.3
1980	10	25.3
1981	21	25.3
1982	19	25.3
1983	12	25.3
1984	27	25.3
1985	39	25.3
1986	41	25.3
1987	24	25.3
1988	37	25.3
1989	23	25.3
1990	32	23.7
1991	20	23.7
1992	27	23.7
1993	7	23.7
1994	34	23.7
1995	9	23.7
1996	24	23.7
1997	10	23.7
1998	44	23.7
1999	30	23.7
2000	22	29.9
2001	25	29.9
2002	18	29.9
2003	48	29.9
2004	27	29.9
2005	21	29.9
2006	48	29.9
2007	40	29.9
2008	20	29.9
2018	30	24
2019	18	24
2020	23	34.6
2021	49	34.6
2022	37	34.6
2023	41	34.6
2024	28	34.6
2025	39	34.6
2026	25	34.6

For each year, a bar from the first to the last day at Heron 2 NW meeting 30 C (86 F).

First to last qualifying date each year at Heron 2 NW
Year	First date	Last date
1913	1913-06-01	1913-08-30
1914	1914-05-31	1914-09-02
1915	1915-06-23	1915-09-05
1916	1916-06-15	1916-08-31
1917	1917-06-14	1917-09-21
1918	1918-06-07	1918-09-20
1919	1919-05-14	1919-09-03
1920	1920-06-21	1920-09-17
1921	1921-06-24	1921-08-31
1922	1922-06-01	1922-09-20
1924	1924-05-10	1924-09-16
1925	1925-06-15	1925-09-03
1926	1926-04-29	1926-08-29
1927	1927-06-07	1927-08-28
1928	1928-05-20	1928-09-05
1929	1929-07-01	1929-09-17
1930	1930-07-05	1930-09-04
1931	1931-05-13	1931-09-05
1932	1932-06-21	1932-09-10
1933	1933-06-13	1933-08-28
1934	1934-05-24	1934-10-10
1935	1935-07-12	1935-09-09
1936	1936-05-13	1936-09-21
1937	1937-06-02	1937-09-15
1938	1938-06-21	1938-09-23
1940	1940-06-11	1940-09-11
1941	1941-05-10	1941-08-21
1942	1942-06-30	1942-09-05
1943	1943-07-06	1943-10-04
1944	1944-07-17	1944-09-12
1945	1945-06-21	1945-09-02
1946	1946-04-25	1946-09-11
1947	1947-05-07	1947-09-04
1948	1948-05-26	1948-09-14
1949	1949-05-09	1949-09-09
1950	1950-06-11	1950-09-21
1951	1951-07-03	1951-08-22
1952	1952-06-09	1952-09-26
1953	1953-05-06	1953-08-19
1954	1954-05-18	1954-08-13
1955	1955-06-10	1955-09-05
1956	1956-05-18	1956-09-19
1957	1957-06-02	1957-09-06
1958	1958-05-18	1958-09-10
1959	1959-06-02	1959-08-10
1960	1960-06-29	1960-08-18
1961	1961-05-25	1961-08-24
1962	1962-06-24	1962-08-25
1963	1963-06-14	1963-09-11
1964	1964-07-01	1964-08-17
1965	1965-07-02	1965-08-19
1966	1966-05-05	1966-09-22
1967	1967-06-16	1967-09-21
1968	1968-06-26	1968-08-04
1969	1969-05-23	1969-09-11
1970	1970-06-03	1970-08-31
1971	1971-05-12	1971-08-29
1972	1972-05-29	1972-08-29
1973	1973-05-14	1973-09-10
1974	1974-06-11	1974-08-29
1975	1975-07-02	1975-08-14
1976	1976-06-28	1976-09-01
1977	1977-04-24	1977-08-21
1978	1978-06-04	1978-08-10
1979	1979-06-02	1979-08-29
1980	1980-05-05	1980-07-31
1981	1981-06-30	1981-09-18
1982	1982-06-12	1982-09-03
1983	1983-05-27	1983-08-09
1984	1984-06-28	1984-09-05
1985	1985-05-23	1985-08-29
1986	1986-05-25	1986-08-29
1987	1987-06-05	1987-09-11
1988	1988-05-12	1988-09-05
1989	1989-06-05	1989-08-12
1990	1990-06-24	1990-09-11
1991	1991-07-03	1991-09-06
1992	1992-05-07	1992-08-20
1993	1993-05-11	1993-07-28
1994	1994-06-21	1994-08-19
1995	1995-05-29	1995-08-05
1996	1996-06-07	1996-09-11
1997	1997-07-05	1997-09-01
1998	1998-07-02	1998-09-15
1999	1999-05-24	1999-08-29
2000	2000-07-13	2000-08-23
2001	2001-05-23	2001-09-25
2002	2002-06-14	2002-08-14
2003	2003-05-24	2003-09-07
2004	2004-06-22	2004-08-18
2005	2005-06-21	2005-08-28
2006	2006-05-15	2006-09-09
2007	2007-06-02	2007-09-03
2008	2008-06-21	2008-08-19
2018	2018-07-05	2018-08-16
2019	2019-07-23	2019-09-05
2020	2020-07-21	2020-09-06
2021	2021-06-02	2021-08-17
2022	2022-06-27	2022-09-02
2023	2023-05-02	2023-08-29
2024	2024-07-07	2024-09-08
2025	2025-05-28	2025-09-04
2026	2026-05-28	2026-08-27

Every Fixed Threshold

Fixed thresholds at Heron 2 NW
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	103	65	1922	25
35 C (95 F): Days	79	19	1925	3
40 C (104 F): Days	4	1	1919	1
90 F (32.2 C): Days	101	38	1925	12
100 F (37.8 C): Days	27	5	1928	2
0 C (32 F): Ice days (max	103	74	1985	12
0 C (32 F): Frost days (min	101	244	1924	90
-10 C (14 F): Days with min	101	58	1943	4
-20 C (-4 F): Days with min	79	18	1932	3
-30 C (-22 F): Days with min	23	7	1937	1
20 C (68 F): Tropical nights (min	2	1	2021	1
10 mm (0.39 in): Days with 10 mm or more rain	103	47	1933	12
25 mm (0.98 in): Days with 25 mm or more rain	99	9	1933	3
50 mm (1.97 in): Days with 50 mm or more rain	14	2	1964	1
10 cm (3.9 in): Days with 10 cm or more snowfall	98	17	1922	2
25 cm (9.8 in): Days with 25 cm or more snowfall	44	6	1922	1
50 cm (19.7 in): Days with 50 cm or more snowfall	2	2	1957	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1913.

Download the Data

Data for Heron 2 NW 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Heron 2 NW Threshold Days by Year (USC00244084)

Key Facts for Heron 2 NW Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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