Pomeroy Threshold Days by Year (USC00456610)

18 fixed thresholds counted per year at Pomeroy (USC00456610): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Pomeroy Thresholds

Pomeroy: days with a maximum temperature at or above 30 C (86 F) in 74 years, most in 1967 with 86.
Pomeroy: days with a maximum temperature at or above 35 C (95 F) in 74 years, most in 1990 with 30.
Pomeroy: days with a maximum temperature at or above 90 F (32.2 C) in 74 years, most in 1958 with 60.
Pomeroy: days with a maximum temperature at or below 0 C (32 F) in 73 years, most in 1949 with 35.
18 fixed thresholds have at least one qualifying day at Pomeroy.

Days at or above 30 C (86 F)

74 years with a qualifying day

Days per year at Pomeroy with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 86 in 1967.

Days at or above 30 C (86 F) per year at Pomeroy
Year	Days	Decade average
1899	31	31
1902	52	51.5
1903	51	51.5
1931	53	53
1932	48	53
1933	48	53
1934	57	53
1935	51	53
1936	55	53
1937	44	53
1938	63	53
1939	58	53
1940	57	50.6
1941	35	50.6
1942	51	50.6
1943	56	50.6
1944	56	50.6
1945	52	50.6
1946	46	50.6
1947	50	50.6
1948	45	50.6
1949	58	50.6
1950	51	45.3
1951	45	45.3
1952	55	45.3
1953	40	45.3
1954	27	45.3
1955	45	45.3
1956	49	45.3
1957	39	45.3
1958	73	45.3
1959	29	45.3
1960	46	48.9
1961	59	48.9
1962	32	48.9
1963	39	48.9
1964	24	48.9
1966	43	48.9
1967	86	48.9
1968	50	48.9
1969	61	48.9
1970	66	59.3
1972	54	59.3
1973	60	59.3
1975	55	59.3
1976	56	59.3
1977	61	59.3
1978	51	59.3
1979	71	59.3
1980	43	52
1981	62	52
1982	54	52
1984	56	52
1989	45	52
1990	58	47.4
1994	59	47.4
1995	35	47.4
1996	43	47.4
1997	34	47.4
1998	58	47.4
1999	45	47.4
2000	34	39.8
2001	42	39.8
2002	42	39.8
2003	48	39.8
2004	40	39.8
2005	37	39.8
2006	47	39.8
2007	33	39.8
2008	37	39.8
2009	38	39.8
2011	37	43.7
2012	34	43.7
2013	60	43.7

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

First to last qualifying date each year at Pomeroy
Year	First date	Last date
1899	1899-06-16	1899-09-25
1902	1902-05-06	1902-09-22
1903	1903-05-12	1903-09-04
1931	1931-05-13	1931-10-02
1932	1932-06-12	1932-09-29
1933	1933-05-26	1933-10-09
1934	1934-04-21	1934-10-12
1935	1935-06-05	1935-10-03
1936	1936-04-17	1936-09-30
1937	1937-06-02	1937-09-19
1938	1938-05-24	1938-09-28
1939	1939-04-29	1939-09-24
1940	1940-05-23	1940-09-12
1941	1941-05-24	1941-08-23
1942	1942-04-21	1942-10-10
1943	1943-06-29	1943-10-10
1944	1944-05-29	1944-09-26
1945	1945-05-04	1945-09-14
1946	1946-04-26	1946-09-14
1947	1947-05-07	1947-09-25
1948	1948-05-27	1948-09-15
1949	1949-05-09	1949-09-27
1950	1950-06-21	1950-09-23
1951	1951-05-23	1951-09-19
1952	1952-04-25	1952-09-27
1953	1953-07-03	1953-09-22
1954	1954-05-19	1954-09-11
1955	1955-06-09	1955-09-11
1956	1956-05-18	1956-09-27
1957	1957-04-30	1957-09-27
1958	1958-05-19	1958-10-05
1959	1959-06-19	1959-09-13
1960	1960-06-13	1960-09-19
1961	1961-05-26	1961-08-30
1962	1962-06-25	1962-09-27
1963	1963-06-15	1963-10-03
1964	1964-06-24	1964-09-17
1966	1966-05-03	1966-09-22
1967	1967-05-21	1967-09-28
1968	1968-04-29	1968-09-10
1969	1969-05-23	1969-09-16
1970	1970-05-16	1970-10-03
1972	1972-05-28	1972-09-04
1973	1973-05-13	1973-09-12
1975	1975-05-14	1975-10-03
1976	1976-05-16	1976-10-01
1977	1977-04-07	1977-09-13
1978	1978-06-02	1978-09-27
1979	1979-05-22	1979-10-06
1980	1980-05-04	1980-10-07
1981	1981-04-30	1981-09-19
1982	1982-06-10	1982-09-18
1984	1984-06-19	1984-10-07
1989	1989-06-01	1989-09-29
1990	1990-05-05	1990-09-24
1994	1994-04-18	1994-09-28
1995	1995-05-29	1995-09-16
1996	1996-06-02	1996-09-11
1997	1997-06-25	1997-09-25
1998	1998-04-30	1998-09-17
1999	1999-05-24	1999-09-22
2000	2000-06-27	2000-09-14
2001	2001-05-22	2001-09-24
2002	2002-06-15	2002-09-15
2003	2003-05-24	2003-09-06
2004	2004-06-21	2004-08-31
2005	2005-05-28	2005-08-28
2006	2006-05-16	2006-09-09
2007	2007-05-09	2007-09-12
2008	2008-05-18	2008-10-02
2009	2009-05-30	2009-09-24
2011	2011-06-23	2011-09-25
2012	2012-05-15	2012-09-21
2013	2013-05-11	2013-09-15

Every Fixed Threshold

Fixed thresholds at Pomeroy
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	74	86	1967	60
35 C (95 F): Days	74	30	1990	15
40 C (104 F): Days	22	5	1975	1
90 F (32.2 C): Days	74	60	1958	39
100 F (37.8 C): Days	59	15	1981	1
110 F (43.3 C): Days	1	1	1990	1
0 C (32 F): Ice days (max	73	35	1949	24
0 C (32 F): Frost days (min	58	147	2013	147
-10 C (14 F): Days with min	56	29	1936	12
-20 C (-4 F): Days with min	34	13	1950	6
-30 C (-22 F): Days with min	2	2	1957	2
20 C (68 F): Tropical nights (min	33	32	1899	1
25 C (77 F): Days with min	2	7	1899	1
10 mm (0.39 in): Days with 10 mm or more rain	72	20	1950	10
25 mm (0.98 in): Days with 25 mm or more rain	26	3	1899	2
50 mm (1.97 in): Days with 50 mm or more rain	2	1	2000	1
10 cm (3.9 in): Days with 10 cm or more snowfall	24	4	1989	2
25 cm (9.8 in): Days with 25 cm or more snowfall	3	1	1968	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1899.

Download the Data

Data for Pomeroy 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).

Pomeroy Threshold Days by Year (USC00456610)

Key Facts for Pomeroy Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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