Grace Threshold Days by Year

16 fixed thresholds counted per year at Grace (USC00103732): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Grace Thresholds

Grace: nights with a minimum temperature at or below 0 C (32 F) in 109 years, most in 1975 with 222.
Grace: nights with a minimum temperature at or below -10 C (14 F) in 109 years, most in 1944 with 96.
Grace: nights with a minimum temperature at or below -20 C (-4 F) in 108 years, most in 1932 with 32.
Grace: days with a maximum temperature at or above 30 C (86 F) in 106 years, most in 1919 with 85.
16 fixed thresholds have at least one qualifying day at Grace.

Days at or above 30 C (86 F)

106 years with a qualifying day

Days per year at Grace with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 85 in 1919.

Days at or above 30 C (86 F) per year at Grace
Year	Days	Decade average
1907	45	42.7
1908	32	42.7
1909	51	42.7
1910	62	56.6
1911	41	56.6
1912	35	56.6
1917	60	56.6
1919	85	56.6
1920	32	22.6
1921	18	22.6
1922	17	22.6
1923	18	22.6
1924	34	22.6
1925	21	22.6
1926	19	22.6
1927	17	22.6
1928	27	22.6
1930	19	29.3
1931	46	29.3
1932	38	29.3
1933	42	29.3
1934	37	29.3
1935	36	29.3
1936	22	29.3
1937	22	29.3
1938	6	29.3
1939	25	29.3
1940	35	15.7
1941	11	15.7
1942	26	15.7
1943	11	15.7
1944	13	15.7
1945	9	15.7
1946	14	15.7
1947	12	15.7
1948	16	15.7
1949	10	15.7
1950	6	16.3
1951	15	16.3
1952	4	16.3
1953	16	16.3
1954	22	16.3
1955	22	16.3
1956	8	16.3
1957	9	16.3
1958	21	16.3
1959	40	16.3
1960	38	27.7
1961	47	27.7
1962	22	27.7
1963	29	27.7
1965	11	27.7
1966	28	27.7
1967	34	27.7
1968	13	27.7
1969	27	27.7
1970	27	25.4
1971	33	25.4
1972	14	25.4
1973	23	25.4
1974	45	25.4
1975	15	25.4
1977	24	25.4
1978	24	25.4
1979	24	25.4
1980	15	29.6
1981	40	29.6
1983	14	29.6
1984	14	29.6
1986	29	29.6
1987	26	29.6
1988	59	29.6
1989	40	29.6
1990	47	43.6
1991	32	43.6
1992	41	43.6
1996	58	43.6
1997	25	43.6
1998	58	43.6
1999	44	43.6
2000	60	55.8
2001	74	55.8
2002	55	55.8
2003	64	55.8
2004	38	55.8
2005	34	55.8
2006	65	55.8
2007	74	55.8
2008	53	55.8
2009	41	55.8
2010	56	43.8
2011	48	43.8
2012	48	43.8
2013	43	43.8
2014	34	43.8
2016	47	43.8
2017	46	43.8
2018	42	43.8
2019	30	43.8
2020	39	34.9
2021	51	34.9
2022	50	34.9
2023	28	34.9
2024	35	34.9
2025	35	34.9
2026	6	34.9

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

First to last qualifying date each year at Grace
Year	First date	Last date
1907	1907-06-05	1907-09-11
1908	1908-07-03	1908-09-07
1909	1909-06-02	1909-08-30
1910	1910-05-31	1910-10-08
1911	1911-06-11	1911-09-11
1912	1912-06-21	1912-08-28
1917	1917-06-15	1917-09-20
1919	1919-05-19	1919-09-14
1920	1920-06-21	1920-09-19
1921	1921-06-12	1921-07-30
1922	1922-06-20	1922-08-27
1923	1923-06-30	1923-08-13
1924	1924-06-14	1924-09-16
1925	1925-06-25	1925-08-21
1926	1926-06-07	1926-08-05
1927	1927-06-23	1927-08-05
1928	1928-07-09	1928-09-06
1930	1930-06-16	1930-08-24
1931	1931-06-15	1931-09-04
1932	1932-06-22	1932-09-06
1933	1933-06-11	1933-08-17
1934	1934-06-12	1934-09-06
1935	1935-06-12	1935-08-29
1936	1936-06-14	1936-08-09
1937	1937-06-21	1937-09-19
1938	1938-07-30	1938-08-24
1939	1939-06-29	1939-08-23
1940	1940-06-13	1940-08-31
1941	1941-07-06	1941-08-08
1942	1942-07-04	1942-09-08
1943	1943-07-06	1943-08-28
1944	1944-07-15	1944-08-23
1945	1945-07-21	1945-09-01
1946	1946-07-14	1946-08-20
1947	1947-07-18	1947-09-05
1948	1948-07-10	1948-09-14
1949	1949-07-02	1949-08-21
1950	1950-08-31	1950-09-05
1951	1951-07-13	1951-08-18
1952	1952-07-23	1952-08-18
1953	1953-07-09	1953-09-12
1954	1954-06-22	1954-09-01
1955	1955-07-14	1955-09-07
1956	1956-07-09	1956-08-23
1957	1957-07-28	1957-08-19
1958	1958-06-27	1958-08-27
1959	1959-06-05	1959-09-13
1960	1960-07-06	1960-09-18
1961	1961-06-16	1961-08-28
1962	1962-06-24	1962-09-18
1963	1963-07-01	1963-09-12
1965	1965-06-23	1965-08-12
1966	1966-06-27	1966-08-24
1967	1967-05-23	1967-09-06
1968	1968-07-04	1968-08-07
1969	1969-06-05	1969-09-07
1970	1970-06-24	1970-08-26
1971	1971-06-21	1971-08-27
1972	1972-07-13	1972-08-13
1973	1973-05-16	1973-08-20
1974	1974-06-13	1974-09-09
1975	1975-07-02	1975-08-10
1977	1977-06-05	1977-09-07
1978	1978-07-09	1978-09-04
1979	1979-06-12	1979-09-08
1980	1980-06-18	1980-09-05
1981	1981-06-25	1981-09-18
1983	1983-07-09	1983-08-11
1984	1984-06-28	1984-08-11
1986	1986-06-01	1986-08-28
1987	1987-06-14	1987-09-25
1988	1988-06-04	1988-09-01
1989	1989-06-18	1989-08-31
1990	1990-06-23	1990-09-17
1991	1991-07-04	1991-09-06
1992	1992-05-06	1992-10-03
1996	1996-06-09	1996-09-12
1997	1997-07-05	1997-09-09
1998	1998-06-28	1998-09-16
1999	1999-06-19	1999-09-09
2000	2000-06-05	2000-09-16
2001	2001-05-24	2001-09-25
2002	2002-05-30	2002-09-04
2003	2003-05-25	2003-09-04
2004	2004-06-24	2004-09-12
2005	2005-06-21	2005-09-09
2006	2006-05-17	2006-09-13
2007	2007-06-03	2007-09-14
2008	2008-06-16	2008-09-16
2009	2009-05-19	2009-09-19
2010	2010-06-26	2010-10-03
2011	2011-06-29	2011-10-01
2012	2012-05-16	2012-08-30
2013	2013-06-10	2013-09-07
2014	2014-07-03	2014-09-19
2016	2016-06-09	2016-09-02
2017	2017-06-20	2017-09-12
2018	2018-07-05	2018-09-11
2019	2019-07-11	2019-09-05
2020	2020-05-30	2020-09-17
2021	2021-06-03	2021-09-09
2022	2022-06-17	2022-09-08
2023	2023-07-02	2023-08-29
2024	2024-06-23	2024-09-06
2025	2025-06-19	2025-08-23
2026	2026-06-19	2026-07-07

Every Fixed Threshold

Fixed thresholds at Grace
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	106	85	1919	6
35 C (95 F): Days	48	32	1919	1
90 F (32.2 C): Days	98	62	1919	1
100 F (37.8 C): Days	10	6	1919	1
0 C (32 F): Ice days (max	106	85	1955	16
0 C (32 F): Frost days (min	109	222	1975	91
-10 C (14 F): Days with min	109	96	1944	16
-20 C (-4 F): Days with min	108	32	1932	2
-30 C (-22 F): Days with min	35	8	1979	2
-40 C (-40 F): Days with min	2	1	1933	1
20 C (68 F): Tropical nights (min	4	5	1910	2
10 mm (0.39 in): Days with 10 mm or more rain	106	19	1986	2
25 mm (0.98 in): Days with 25 mm or more rain	41	3	2016	1
50 mm (1.97 in): Days with 50 mm or more rain	1	1	1911	1
10 cm (3.9 in): Days with 10 cm or more snowfall	52	8	1936	1
25 cm (9.8 in): Days with 25 cm or more snowfall	7	1	1910	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1907.

Download the Data

Data for Grace 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Grace Threshold Days by Year

Key Facts for Grace Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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