Plainville 4WNW Threshold Days by Year (USC00146435)

20 fixed thresholds counted per year at Plainville 4WNW (USC00146435): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Plainville 4WNW Thresholds

Plainville 4WNW: days with 10 mm (0.39 in) or more of precipitation in 109 years, most in 1973 with 35.
Plainville 4WNW: days with 25 mm (0.98 in) or more of precipitation in 108 years, most in 1993 with 14.
Plainville 4WNW: days with a maximum temperature at or above 30 C (86 F) in 106 years, most in 1956 with 123.
Plainville 4WNW: days with a maximum temperature at or above 35 C (95 F) in 106 years, most in 1934 with 75.
20 fixed thresholds have at least one qualifying day at Plainville 4WNW.

Days at or above 30 C (86 F)

106 years with a qualifying day

Days per year at Plainville 4WNW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 123 in 1956.

Days at or above 30 C (86 F) per year at Plainville 4WNW
Year	Days	Decade average
1917	79	84.3
1918	94	84.3
1919	80	84.3
1920	75	82.2
1921	95	82.2
1922	101	82.2
1923	65	82.2
1924	82	82.2
1925	92	82.2
1926	103	82.2
1927	72	82.2
1928	62	82.2
1929	75	82.2
1930	70	98.6
1931	98	98.6
1932	87	98.6
1933	102	98.6
1934	114	98.6
1935	79	98.6
1936	107	98.6
1937	101	98.6
1938	108	98.6
1939	120	98.6
1940	91	83
1941	82	83
1942	77	83
1943	91	83
1944	71	83
1945	71	83
1946	83	83
1947	95	83
1948	90	83
1949	79	83
1950	59	88.1
1951	54	88.1
1952	107	88.1
1953	111	88.1
1954	97	88.1
1955	99	88.1
1956	123	88.1
1957	68	88.1
1958	74	88.1
1959	89	88.1
1960	80	80.5
1961	68	80.5
1962	78	80.5
1963	95	80.5
1964	94	80.5
1965	73	80.5
1966	86	80.5
1967	75	80.5
1968	90	80.5
1969	66	80.5
1970	98	85.7
1971	92	85.7
1972	79	85.7
1973	76	85.7
1974	79	85.7
1975	89	85.7
1976	81	85.7
1977	82	85.7
1978	91	85.7
1979	90	85.7
1980	102	83.8
1981	80	83.8
1982	71	83.8
1987	82	83.8
1988	93	83.8
1989	75	83.8
1990	64	68.9
1991	73	68.9
1992	39	68.9
1993	52	68.9
1994	92	68.9
1995	72	68.9
1996	69	68.9
1997	71	68.9
1998	94	68.9
1999	63	68.9
2000	96	81.2
2001	83	81.2
2002	93	81.2
2003	80	81.2
2004	74	81.2
2005	85	81.2
2006	94	81.2
2007	83	81.2
2008	69	81.2
2009	55	81.2
2010	87	87.3
2011	88	87.3
2012	107	87.3
2013	84	87.3
2014	86	87.3
2015	93	87.3
2016	80	87.3
2017	82	87.3
2018	82	87.3
2019	84	87.3
2020	87	102.4
2021	93	102.4
2022	109	102.4
2023	101	102.4
2024	104	102.4
2025	93	102.4
2026	130	102.4

For each year, a bar from the first to the last day at Plainville 4WNW meeting 30 C (86 F).

First to last qualifying date each year at Plainville 4WNW
Year	First date	Last date
1917	1917-03-30	1917-09-13
1918	1918-05-08	1918-10-16
1919	1919-06-20	1919-10-01
1920	1920-05-22	1920-10-10
1921	1921-03-18	1921-10-24
1922	1922-05-05	1922-10-28
1923	1923-06-16	1923-09-28
1924	1924-04-14	1924-10-02
1925	1925-03-23	1925-09-29
1926	1926-04-17	1926-10-18
1927	1927-04-26	1927-10-27
1928	1928-04-02	1928-10-10
1929	1929-04-03	1929-10-17
1930	1930-04-09	1930-09-23
1931	1931-05-15	1931-10-10
1932	1932-05-05	1932-10-12
1933	1933-05-16	1933-09-25
1934	1934-04-10	1934-10-21
1935	1935-03-15	1935-09-25
1936	1936-04-12	1936-10-19
1937	1937-04-22	1937-10-29
1938	1938-05-26	1938-10-31
1939	1939-04-23	1939-10-26
1940	1940-04-01	1940-10-25
1941	1941-05-14	1941-10-13
1942	1942-04-04	1942-10-08
1943	1943-03-29	1943-10-19
1944	1944-05-12	1944-09-26
1945	1945-04-09	1945-11-05
1946	1946-03-31	1946-09-26
1947	1947-05-03	1947-10-21
1948	1948-04-17	1948-10-15
1949	1949-04-24	1949-10-07
1950	1950-03-25	1950-10-17
1951	1951-04-28	1951-10-03
1952	1952-05-04	1952-10-26
1953	1953-04-21	1953-10-10
1954	1954-04-06	1954-10-09
1955	1955-04-26	1955-10-11
1956	1956-04-21	1956-10-13
1957	1957-06-05	1957-09-30
1958	1958-05-20	1958-10-16
1959	1959-04-30	1959-10-25
1960	1960-04-21	1960-09-20
1961	1961-04-19	1961-10-07
1962	1962-04-20	1962-10-14
1963	1963-04-15	1963-10-10
1964	1964-04-16	1964-10-07
1965	1965-04-22	1965-10-10
1966	1966-05-05	1966-10-12
1967	1967-03-23	1967-10-04
1968	1968-03-30	1968-10-30
1969	1969-05-26	1969-10-02
1970	1970-04-27	1970-10-04
1971	1971-03-31	1971-10-10
1972	1972-03-06	1972-10-10
1973	1973-05-18	1973-10-23
1974	1974-04-27	1974-10-03
1975	1975-04-17	1975-10-13
1976	1976-03-25	1976-10-11
1977	1977-04-08	1977-10-20
1978	1978-03-31	1978-10-20
1979	1979-05-06	1979-10-11
1980	1980-04-20	1980-10-08
1981	1981-04-10	1981-09-29
1982	1982-04-12	1982-09-29
1987	1987-04-19	1987-10-05
1988	1988-05-13	1988-10-15
1989	1989-03-11	1989-10-15
1990	1990-05-24	1990-10-27
1991	1991-04-07	1991-10-17
1992	1992-04-14	1992-09-17
1993	1993-05-27	1993-10-06
1994	1994-03-17	1994-09-30
1995	1995-06-06	1995-10-16
1996	1996-04-02	1996-09-10
1997	1997-04-18	1997-10-06
1998	1998-05-13	1998-09-28
1999	1999-04-21	1999-10-13
2000	2000-04-06	2000-10-02
2001	2001-04-20	2001-10-03
2002	2002-04-15	2002-10-02
2003	2003-04-02	2003-10-23
2004	2004-04-17	2004-09-21
2005	2005-05-11	2005-10-19
2006	2006-04-14	2006-11-09
2007	2007-05-14	2007-10-21
2008	2008-05-18	2008-09-29
2009	2009-04-25	2009-10-01
2010	2010-05-23	2010-10-09
2011	2011-04-10	2011-10-25
2012	2012-04-01	2012-10-04
2013	2013-03-16	2013-10-04
2014	2014-04-10	2014-10-26
2015	2015-03-17	2015-10-21
2016	2016-02-19	2016-11-01
2017	2017-03-20	2017-10-18
2018	2018-04-13	2018-10-04
2019	2019-04-21	2019-10-01
2020	2020-04-08	2020-10-12
2021	2021-04-05	2021-10-10
2022	2022-04-13	2022-10-24
2023	2023-04-12	2023-10-24
2024	2024-04-14	2024-10-23
2025	2025-03-11	2025-10-13
2026	2026-03-20	2026-10-13

Every Fixed Threshold

Fixed thresholds at Plainville 4WNW
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	106	123	1956	130
35 C (95 F): Days	106	75	1934	42
40 C (104 F): Days	84	36	1936	11
45 C (113 F): Days	8	3	1954	2
90 F (32.2 C): Days	106	96	1934	93
100 F (37.8 C): Days	104	51	1936	25
110 F (43.3 C): Days	21	10	1936	2
0 C (32 F): Ice days (max	106	51	1978	12
0 C (32 F): Frost days (min	106	165	2013	72
-10 C (14 F): Days with min	106	70	1996	16
-20 C (-4 F): Days with min	84	14	1924	4
-30 C (-22 F): Days with min	1	2	1989	2
20 C (68 F): Tropical nights (min	106	59	1934	35
25 C (77 F): Days with min	36	19	1934	1
10 mm (0.39 in): Days with 10 mm or more rain	109	35	1973	16
25 mm (0.98 in): Days with 25 mm or more rain	108	14	1993	6
50 mm (1.97 in): Days with 50 mm or more rain	64	5	1987	5
100 mm (3.94 in): Days with 100 mm or more rain	6	3	2016	3
10 cm (3.9 in): Days with 10 cm or more snowfall	75	7	1960	1
25 cm (9.8 in): Days with 25 cm or more snowfall	9	2	1987	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1917.

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Data for Plainville 4WNW 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Plainville 4WNW Threshold Days by Year (USC00146435)

Key Facts for Plainville 4WNW Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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