Rochester Gtr Intl Threshold Days by Year (USW00014768)

17 fixed thresholds counted per year at Rochester Gtr Intl (USW00014768): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Rochester Gtr Intl Thresholds

Rochester Gtr Intl: days with a maximum temperature at or above 30 C (86 F) in 101 years, most in 1949 with 56.
Rochester Gtr Intl: days with a maximum temperature at or below 0 C (32 F) in 101 years, most in 1960 with 74.
Rochester Gtr Intl: nights with a minimum temperature at or below 0 C (32 F) in 101 years, most in 1962 with 157.
Rochester Gtr Intl: nights with a minimum temperature at or below -10 C (14 F) in 101 years, most in 1963 with 54.
17 fixed thresholds have at least one qualifying day at Rochester Gtr Intl.

Days at or above 30 C (86 F)

101 years with a qualifying day

Days per year at Rochester Gtr Intl with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 56 in 1949.

Days at or above 30 C (86 F) per year at Rochester Gtr Intl
Year	Days	Decade average
1926	10	15
1927	10	15
1928	16	15
1929	24	15
1930	28	27.6
1931	31	27.6
1932	17	27.6
1933	34	27.6
1934	29	27.6
1935	26	27.6
1936	33	27.6
1937	27	27.6
1938	28	27.6
1939	23	27.6
1940	22	32.5
1941	42	32.5
1942	26	32.5
1943	30	32.5
1944	34	32.5
1945	27	32.5
1946	22	32.5
1947	38	32.5
1948	28	32.5
1949	56	32.5
1950	18	29.4
1951	27	29.4
1952	48	29.4
1953	40	29.4
1954	21	29.4
1955	50	29.4
1956	12	29.4
1957	21	29.4
1958	9	29.4
1959	48	29.4
1960	17	23.8
1961	24	23.8
1962	23	23.8
1963	20	23.8
1964	33	23.8
1965	24	23.8
1966	34	23.8
1967	13	23.8
1968	24	23.8
1969	26	23.8
1970	37	30.1
1971	34	30.1
1972	30	30.1
1973	42	30.1
1974	25	30.1
1975	24	30.1
1976	16	30.1
1977	27	30.1
1978	40	30.1
1979	26	30.1
1980	31	21.7
1981	13	21.7
1982	12	21.7
1983	34	21.7
1984	16	21.7
1985	15	21.7
1986	10	21.7
1987	27	21.7
1988	36	21.7
1989	23	21.7
1990	18	19.7
1991	34	19.7
1992	5	19.7
1993	25	19.7
1994	24	19.7
1995	36	19.7
1996	8	19.7
1997	9	19.7
1998	8	19.7
1999	30	19.7
2000	5	20.5
2001	26	20.5
2002	40	20.5
2003	13	20.5
2004	3	20.5
2005	36	20.5
2006	21	20.5
2007	37	20.5
2008	18	20.5
2009	6	20.5
2010	26	27.4
2011	23	27.4
2012	34	27.4
2013	24	27.4
2014	18	27.4
2015	22	27.4
2016	45	27.4
2017	20	27.4
2018	40	27.4
2019	22	27.4
2020	34	26.4
2021	30	26.4
2022	29	26.4
2023	15	26.4
2024	31	26.4
2025	30	26.4
2026	16	26.4

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

First to last qualifying date each year at Rochester Gtr Intl
Year	First date	Last date
1926	1926-06-29	1926-10-04
1927	1927-05-22	1927-10-02
1928	1928-05-04	1928-09-12
1929	1929-05-29	1929-09-05
1930	1930-05-07	1930-09-26
1931	1931-05-19	1931-09-22
1932	1932-05-16	1932-09-20
1933	1933-06-07	1933-09-08
1934	1934-05-21	1934-09-26
1935	1935-06-02	1935-09-25
1936	1936-05-01	1936-09-23
1937	1937-05-31	1937-09-25
1938	1938-06-16	1938-08-21
1939	1939-05-27	1939-09-16
1940	1940-05-15	1940-08-18
1941	1941-04-20	1941-10-07
1942	1942-04-28	1942-09-19
1943	1943-06-04	1943-09-06
1944	1944-05-03	1944-09-20
1945	1945-04-13	1945-09-10
1946	1946-06-16	1946-09-28
1947	1947-06-05	1947-09-15
1948	1948-06-23	1948-09-07
1949	1949-05-04	1949-10-11
1950	1950-06-07	1950-10-02
1951	1951-05-26	1951-10-05
1952	1952-06-08	1952-09-14
1953	1953-05-10	1953-10-03
1954	1954-06-10	1954-10-14
1955	1955-05-27	1955-09-19
1956	1956-06-12	1956-09-05
1957	1957-06-13	1957-08-24
1958	1958-07-14	1958-08-31
1959	1959-05-20	1959-09-29
1960	1960-06-04	1960-09-09
1961	1961-05-15	1961-09-23
1962	1962-04-27	1962-09-13
1963	1963-06-09	1963-10-07
1964	1964-05-23	1964-09-10
1965	1965-05-09	1965-09-22
1966	1966-05-24	1966-09-02
1967	1967-06-04	1967-08-03
1968	1968-06-07	1968-09-24
1969	1969-05-29	1969-09-14
1970	1970-04-30	1970-09-24
1971	1971-05-18	1971-10-02
1972	1972-05-29	1972-09-07
1973	1973-04-21	1973-09-05
1974	1974-04-28	1974-08-26
1975	1975-05-23	1975-08-26
1976	1976-06-08	1976-09-09
1977	1977-04-21	1977-09-01
1978	1978-05-26	1978-09-21
1979	1979-05-08	1979-09-05
1980	1980-05-23	1980-09-22
1981	1981-06-15	1981-07-19
1982	1982-05-07	1982-09-14
1983	1983-06-12	1983-09-20
1984	1984-05-22	1984-08-10
1985	1985-07-05	1985-09-07
1986	1986-06-01	1986-08-17
1987	1987-05-28	1987-08-17
1988	1988-05-30	1988-08-17
1989	1989-05-19	1989-09-09
1990	1990-04-26	1990-08-17
1991	1991-05-16	1991-09-16
1992	1992-05-17	1992-08-26
1993	1993-06-24	1993-09-14
1994	1994-04-15	1994-09-16
1995	1995-06-06	1995-08-31
1996	1996-05-18	1996-08-14
1997	1997-06-21	1997-08-10
1998	1998-05-16	1998-08-09
1999	1999-05-30	1999-09-06
2000	2000-06-10	2000-09-01
2001	2001-04-23	2001-09-09
2002	2002-06-11	2002-09-20
2003	2003-06-24	2003-08-29
2004	2004-06-08	2004-08-27
2005	2005-06-05	2005-09-14
2006	2006-05-29	2006-08-18
2007	2007-05-09	2007-09-25
2008	2008-04-19	2008-09-14
2009	2009-06-25	2009-08-20
2010	2010-04-02	2010-09-24
2011	2011-05-29	2011-09-03
2012	2012-04-16	2012-09-03
2013	2013-05-21	2013-09-11
2014	2014-05-09	2014-09-05
2015	2015-05-08	2015-09-08
2016	2016-05-25	2016-09-10
2017	2017-04-27	2017-09-27
2018	2018-05-28	2018-10-09
2019	2019-06-26	2019-10-01
2020	2020-05-25	2020-08-24
2021	2021-05-20	2021-08-29
2022	2022-05-21	2022-08-29
2023	2023-06-01	2023-10-04
2024	2024-05-20	2024-08-30
2025	2025-06-04	2025-10-05
2026	2026-05-18	2026-08-06

Every Fixed Threshold

Fixed thresholds at Rochester Gtr Intl
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	101	56	1949	16
35 C (95 F): Days	43	9	1952	1
90 F (32.2 C): Days	96	32	1952	6
100 F (37.8 C): Days	2	3	1936	1
0 C (32 F): Ice days (max	101	74	1960	34
0 C (32 F): Frost days (min	101	157	1962	79
-10 C (14 F): Days with min	101	54	1963	31
-20 C (-4 F): Days with min	60	10	1979	3
-30 C (-22 F): Days with min	1	1	1934	1
20 C (68 F): Tropical nights (min	101	31	2018	14
25 C (77 F): Days with min	5	3	1936	1
10 mm (0.39 in): Days with 10 mm or more rain	101	37	1990	27
25 mm (0.98 in): Days with 25 mm or more rain	100	11	1945	6
50 mm (1.97 in): Days with 50 mm or more rain	36	4	1945	1
10 cm (3.9 in): Days with 10 cm or more snowfall	100	11	1958	3
25 cm (9.8 in): Days with 25 cm or more snowfall	40	4	1978	1
50 cm (19.7 in): Days with 50 cm or more snowfall	2	1	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 1926.

Download the Data

Data for Rochester Gtr Intl 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).

Rochester Gtr Intl Threshold Days by Year (USW00014768)

Key Facts for Rochester Gtr Intl Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related