Hillsboro 3 N Threshold Days by Year

20 fixed thresholds counted per year at Hillsboro 3 N (USC00324203): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hillsboro 3 N Thresholds

Hillsboro 3 N: days with a maximum temperature at or above 30 C (86 F) in 94 years, most in 1936 with 70.
Hillsboro 3 N: days with a maximum temperature at or above 90 F (32.2 C) in 94 years, most in 1936 with 46.
Hillsboro 3 N: days with a maximum temperature at or below 0 C (32 F) in 94 years, most in 1950 with 129.
Hillsboro 3 N: nights with a minimum temperature at or below 0 C (32 F) in 89 years, most in 1907 with 217.
20 fixed thresholds have at least one qualifying day at Hillsboro 3 N.

Days at or above 30 C (86 F)

94 years with a qualifying day

Days per year at Hillsboro 3 N with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 70 in 1936.

Days at or above 30 C (86 F) per year at Hillsboro 3 N
Year	Days	Decade average
1906	31	25.5
1907	14	25.5
1908	31	25.5
1909	26	25.5
1910	45	28.2
1911	24	28.2
1912	19	28.2
1913	35	28.2
1914	29	28.2
1915	16	28.2
1916	28	28.2
1917	28	28.2
1918	22	28.2
1919	36	28.2
1920	35	32.6
1921	40	32.6
1922	34	32.6
1923	27	32.6
1924	16	32.6
1925	33	32.6
1926	33	32.6
1927	29	32.6
1929	46	32.6
1930	41	49.1
1931	46	49.1
1932	45	49.1
1933	54	49.1
1934	59	49.1
1935	35	49.1
1936	70	49.1
1937	43	49.1
1938	49	49.1
1941	33	26.6
1942	12	26.6
1943	28	26.6
1944	21	26.6
1945	21	26.6
1946	22	26.6
1947	42	26.6
1948	24	26.6
1949	36	26.6
1950	21	31.2
1951	16	31.2
1952	38	31.2
1953	34	31.2
1954	25	31.2
1955	55	31.2
1956	19	31.2
1957	28	31.2
1958	27	31.2
1959	49	31.2
1960	40	33.7
1961	49	33.7
1962	21	33.7
1963	40	33.7
1964	33	33.7
1965	16	33.7
1966	43	33.7
1967	36	33.7
1968	24	33.7
1969	35	33.7
1970	52	37.7
1971	23	37.7
1972	36	37.7
1973	39	37.7
1974	30	37.7
1975	35	37.7
1976	64	37.7
1977	30	37.7
1978	43	37.7
1979	25	37.7
1980	55	36.3
1981	19	36.3
1983	28	36.3
1986	23	36.3
1987	41	36.3
1988	49	36.3
1989	39	36.3
1990	36	25.1
1991	33	25.1
1992	17	25.1
1993	9	25.1
1994	18	25.1
1995	30	25.1
1996	28	25.1
1997	28	25.1
1998	31	25.1
1999	21	25.1
2000	23	20.2
2004	10	20.2
2006	31	20.2
2007	27	20.2
2009	10	20.2
2011	30	30

For each year, a bar from the first to the last day at Hillsboro 3 N meeting 30 C (86 F).

First to last qualifying date each year at Hillsboro 3 N
Year	First date	Last date
1906	1906-05-11	1906-09-10
1907	1907-06-16	1907-08-14
1908	1908-04-21	1908-09-22
1909	1909-06-19	1909-10-07
1910	1910-06-13	1910-10-17
1911	1911-05-17	1911-08-20
1912	1912-05-26	1912-09-08
1913	1913-05-27	1913-09-07
1914	1914-05-25	1914-10-01
1915	1915-08-09	1915-09-06
1916	1916-07-01	1916-09-03
1917	1917-05-16	1917-09-23
1918	1918-05-04	1918-08-27
1919	1919-05-27	1919-09-08
1920	1920-06-13	1920-10-07
1921	1921-05-21	1921-09-06
1922	1922-06-04	1922-10-04
1923	1923-05-27	1923-08-30
1924	1924-07-06	1924-08-30
1925	1925-05-19	1925-09-04
1926	1926-04-29	1926-09-01
1927	1927-06-18	1927-09-14
1929	1929-05-25	1929-09-22
1930	1930-05-03	1930-09-23
1931	1931-05-15	1931-09-12
1932	1932-05-13	1932-09-09
1933	1933-06-01	1933-09-18
1934	1934-04-29	1934-09-13
1935	1935-07-01	1935-08-23
1936	1936-05-22	1936-09-23
1937	1937-05-28	1937-09-23
1938	1938-06-05	1938-10-03
1941	1941-05-18	1941-09-19
1942	1942-07-09	1942-08-28
1943	1943-06-18	1943-08-31
1944	1944-05-29	1944-10-27
1945	1945-06-21	1945-09-06
1946	1946-06-11	1946-08-15
1947	1947-07-03	1947-10-05
1948	1948-05-19	1948-09-15
1949	1949-06-05	1949-09-24
1950	1950-06-06	1950-09-07
1951	1951-07-07	1951-08-02
1952	1952-04-26	1952-09-28
1953	1953-05-07	1953-10-01
1954	1954-06-13	1954-09-04
1955	1955-05-02	1955-09-17
1956	1956-06-08	1956-09-27
1957	1957-07-01	1957-09-01
1958	1958-05-12	1958-09-23
1959	1959-05-01	1959-09-13
1960	1960-05-31	1960-09-20
1961	1961-05-31	1961-09-08
1962	1962-06-10	1962-09-02
1963	1963-05-07	1963-10-05
1964	1964-05-20	1964-09-09
1965	1965-05-13	1965-08-15
1966	1966-05-21	1966-09-12
1967	1967-05-24	1967-09-07
1968	1968-06-03	1968-09-14
1969	1969-05-14	1969-09-13
1970	1970-05-17	1970-09-20
1971	1971-06-15	1971-09-13
1972	1972-05-16	1972-08-30
1973	1973-06-01	1973-08-31
1974	1974-06-03	1974-09-26
1975	1975-06-18	1975-10-07
1976	1976-05-08	1976-10-01
1977	1977-05-10	1977-07-24
1978	1978-05-25	1978-09-10
1979	1979-06-13	1979-09-26
1980	1980-04-19	1980-10-08
1981	1981-06-30	1981-09-13
1983	1983-06-11	1983-09-28
1986	1986-05-04	1986-08-19
1987	1987-04-18	1987-09-03
1988	1988-05-18	1988-08-24
1989	1989-05-17	1989-10-01
1990	1990-04-21	1990-09-26
1991	1991-05-12	1991-09-07
1992	1992-05-01	1992-10-02
1993	1993-05-14	1993-08-26
1994	1994-04-24	1994-09-11
1995	1995-06-04	1995-09-14
1996	1996-06-10	1996-09-10
1997	1997-06-02	1997-10-03
1998	1998-06-26	1998-09-18
1999	1999-05-29	1999-09-23
2000	2000-05-06	2000-09-10
2004	2004-06-29	2004-09-19
2006	2006-05-23	2006-09-07
2007	2007-05-13	2007-09-23
2009	2009-06-20	2009-09-19
2011	2011-06-07	2011-10-05

Every Fixed Threshold

Fixed thresholds at Hillsboro 3 N
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	94	70	1936	30
35 C (95 F): Days	79	28	1936	1
40 C (104 F): Days	11	10	1936	1
45 C (113 F): Days	1	2	1936	2
90 F (32.2 C): Days	94	46	1936	8
100 F (37.8 C): Days	29	13	1936	2
110 F (43.3 C): Days	1	4	1936	4
0 C (32 F): Ice days (max	94	129	1950	85
0 C (32 F): Frost days (min	89	217	1907	161
-10 C (14 F): Days with min	89	124	1955	84
-20 C (-4 F): Days with min	89	73	1950	32
-30 C (-22 F): Days with min	81	27	1936	1
-40 C (-40 F): Days with min	2	1	1916	1
20 C (68 F): Tropical nights (min	75	18	1936	12
25 C (77 F): Days with min	5	3	1931	1
10 mm (0.39 in): Days with 10 mm or more rain	81	26	1965	16
25 mm (0.98 in): Days with 25 mm or more rain	78	9	1912	3
50 mm (1.97 in): Days with 50 mm or more rain	37	3	1941	1
100 mm (3.94 in): Days with 100 mm or more rain	7	1	1909	1
10 cm (3.9 in): Days with 10 cm or more snowfall	22	8	1996	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1906.

Download the Data

Data for Hillsboro 3 N 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).

Hillsboro 3 N Threshold Days by Year

Key Facts for Hillsboro 3 N Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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