Seneca Threshold Days by Year (USC00357675)

16 fixed thresholds counted per year at Seneca (USC00357675): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Seneca Thresholds

Seneca: days with 10 mm (0.39 in) or more of precipitation in 69 years, most in 1983 with 12.
Seneca: days with a maximum temperature at or above 30 C (86 F) in 65 years, most in 1961 with 47.
Seneca: days with a maximum temperature at or above 90 F (32.2 C) in 64 years, most in 1935 with 24.
Seneca: days with a maximum temperature at or below 0 C (32 F) in 64 years, most in 1985 with 87.
16 fixed thresholds have at least one qualifying day at Seneca.

Days at or above 30 C (86 F)

65 years with a qualifying day

Days per year at Seneca with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 47 in 1961.

Days at or above 30 C (86 F) per year at Seneca
Year	Days	Decade average
1932	29	27.8
1933	35	27.8
1934	30	27.8
1935	40	27.8
1936	6	27.8
1937	34	27.8
1938	11	27.8
1939	37	27.8
1940	43	32.5
1942	22	32.5
1951	31	23.9
1952	27	23.9
1953	19	23.9
1955	40	23.9
1956	21	23.9
1957	5	23.9
1958	22	23.9
1959	26	23.9
1960	29	24.4
1961	47	24.4
1962	19	24.4
1963	17	24.4
1964	16	24.4
1966	13	24.4
1967	38	24.4
1968	19	24.4
1969	22	24.4
1970	33	29.3
1971	35	29.3
1972	20	29.3
1973	29	29.3
1981	23	18.8
1982	11	18.8
1983	14	18.8
1984	18	18.8
1985	25	18.8
1986	18	18.8
1987	14	18.8
1988	33	18.8
1989	13	18.8
1990	34	22.8
1991	15	22.8
1992	23	22.8
1993	2	22.8
1994	33	22.8
1995	15	22.8
1996	31	22.8
1997	11	22.8
1998	37	22.8
1999	27	22.8
2000	26	30.6
2001	30	30.6
2002	28	30.6
2003	36	30.6
2004	28	30.6
2005	29	30.6
2006	32	30.6
2007	38	30.6
2008	27	30.6
2009	32	30.6
2010	21	27.6
2011	23	27.6
2012	37	27.6
2013	30	27.6
2019	27	27.6

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

First to last qualifying date each year at Seneca
Year	First date	Last date
1932	1932-06-20	1932-09-16
1933	1933-06-11	1933-08-28
1934	1934-05-19	1934-09-04
1935	1935-07-10	1935-09-19
1936	1936-05-19	1936-06-27
1937	1937-06-22	1937-09-13
1938	1938-06-07	1938-07-26
1939	1939-06-28	1939-09-02
1940	1940-06-06	1940-08-31
1942	1942-06-29	1942-07-31
1951	1951-07-12	1951-09-24
1952	1952-07-08	1952-09-25
1953	1953-07-06	1953-09-14
1955	1955-06-08	1955-09-12
1956	1956-06-27	1956-08-23
1957	1957-07-04	1957-09-15
1958	1958-06-23	1958-09-08
1959	1959-06-12	1959-08-17
1960	1960-06-26	1960-09-12
1961	1961-06-16	1961-10-17
1962	1962-06-26	1962-08-26
1963	1963-05-22	1963-09-30
1964	1964-06-30	1964-09-14
1966	1966-07-24	1966-09-06
1967	1967-06-30	1967-09-29
1968	1968-06-19	1968-09-01
1969	1969-06-05	1969-09-09
1970	1970-06-03	1970-08-31
1971	1971-07-15	1971-08-29
1972	1972-06-29	1972-08-30
1973	1973-05-14	1973-09-06
1981	1981-07-04	1981-09-19
1982	1982-07-25	1982-09-03
1983	1983-05-28	1983-08-14
1984	1984-06-29	1984-09-20
1985	1985-06-18	1985-08-27
1986	1986-06-24	1986-08-28
1987	1987-06-14	1987-09-24
1988	1988-06-17	1988-09-06
1989	1989-07-07	1989-08-08
1990	1990-06-22	1990-09-12
1991	1991-07-04	1991-09-27
1992	1992-06-23	1992-09-23
1993	1993-08-04	1993-09-11
1994	1994-06-21	1994-09-28
1995	1995-07-19	1995-09-16
1996	1996-07-02	1996-10-10
1997	1997-07-06	1997-09-09
1998	1998-07-09	1998-09-15
1999	1999-06-15	1999-08-30
2000	2000-06-30	2000-09-15
2001	2001-05-24	2001-09-12
2002	2002-06-16	2002-09-15
2003	2003-05-29	2003-09-29
2004	2004-06-23	2004-09-01
2005	2005-07-06	2005-09-09
2006	2006-05-18	2006-09-13
2007	2007-06-03	2007-09-11
2008	2008-05-17	2008-09-16
2009	2009-07-06	2009-09-26
2010	2010-07-10	2010-10-03
2011	2011-07-07	2011-09-25
2012	2012-06-22	2012-09-22
2013	2013-06-29	2013-09-12
2019	2019-07-13	2019-09-06

Every Fixed Threshold

Fixed thresholds at Seneca
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	65	47	1961	27
35 C (95 F): Days	39	14	1935	2
40 C (104 F): Days	3	1	1933	1
90 F (32.2 C): Days	64	24	1935	10
100 F (37.8 C): Days	11	3	1961	1
0 C (32 F): Ice days (max	64	87	1985	21
0 C (32 F): Frost days (min	63	313	1942	218
-10 C (14 F): Days with min	63	143	1936	74
-20 C (-4 F): Days with min	63	51	1985	8
-30 C (-22 F): Days with min	37	13	1972	1
-40 C (-40 F): Days with min	7	3	1989	3
10 mm (0.39 in): Days with 10 mm or more rain	69	12	1983	5
25 mm (0.98 in): Days with 25 mm or more rain	20	2	1989	1
50 mm (1.97 in): Days with 50 mm or more rain	1	1	1984	1
10 cm (3.9 in): Days with 10 cm or more snowfall	49	11	1955	6
25 cm (9.8 in): Days with 25 cm or more snowfall	5	1	1936	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1932.

Download the Data

Data for Seneca 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).

Seneca Threshold Days by Year (USC00357675)

Key Facts for Seneca Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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