Chester Threshold Days by Year (USC00241692)

17 fixed thresholds counted per year at Chester (USC00241692): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Chester Thresholds

Chester: days with 10 mm (0.39 in) or more of precipitation in 81 years, most in 1911 with 15.
Chester: nights with a minimum temperature at or below 0 C (32 F) in 80 years, most in 1946 with 233.
Chester: nights with a minimum temperature at or below -10 C (14 F) in 80 years, most in 1946 with 116.
Chester: nights with a minimum temperature at or below -20 C (-4 F) in 80 years, most in 1911 with 54.
17 fixed thresholds have at least one qualifying day at Chester.

Days at or above 30 C (86 F)

78 years with a qualifying day

Days per year at Chester with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 64 in 1988.

Days at or above 30 C (86 F) per year at Chester
Year	Days	Decade average
1901	37	22.7
1906	29	22.7
1907	2	22.7
1911	20	23
1912	22	23
1913	27	23
1943	35	33.8
1944	30	33.8
1945	40	33.8
1946	27	33.8
1947	37	33.8
1952	37	36.3
1953	36	36.3
1954	29	36.3
1956	36	36.3
1957	38	36.3
1958	42	36.3
1959	36	36.3
1960	43	39.3
1961	56	39.3
1962	29	39.3
1963	50	39.3
1964	35	39.3
1965	24	39.3
1966	40	39.3
1967	46	39.3
1968	23	39.3
1969	47	39.3
1970	43	34.3
1971	44	34.3
1972	37	34.3
1973	42	34.3
1974	35	34.3
1975	22	34.3
1976	27	34.3
1977	26	34.3
1978	26	34.3
1979	41	34.3
1980	23	38.2
1981	48	38.2
1982	28	38.2
1983	35	38.2
1984	50	38.2
1985	28	38.2
1986	35	38.2
1987	33	38.2
1988	64	38.2
1990	52	33.7
1991	43	33.7
1993	6	33.7
1994	39	33.7
1995	16	33.7
1996	36	33.7
1997	29	33.7
1998	48	33.7
1999	34	33.7
2000	44	35.7
2001	57	35.7
2002	31	35.7
2003	47	35.7
2004	16	35.7
2005	27	35.7
2007	43	35.7
2008	27	35.7
2009	29	35.7
2010	17	27.8
2011	40	27.8
2012	32	27.8
2013	21	27.8
2014	31	27.8
2015	26	27.8
2020	22	35.3
2021	45	35.3
2022	46	35.3
2023	38	35.3
2024	30	35.3
2025	31	35.3
2026	35	35.3

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

First to last qualifying date each year at Chester
Year	First date	Last date
1901	1901-05-16	1901-09-03
1906	1906-04-22	1906-09-23
1907	1907-08-08	1907-08-24
1911	1911-05-05	1911-08-31
1912	1912-05-16	1912-08-26
1913	1913-05-24	1913-09-15
1943	1943-07-06	1943-10-04
1944	1944-05-15	1944-09-13
1945	1945-06-21	1945-09-03
1946	1946-06-03	1946-09-14
1947	1947-07-02	1947-09-05
1952	1952-04-25	1952-09-26
1953	1953-05-06	1953-09-15
1954	1954-06-22	1954-08-30
1956	1956-06-04	1956-09-26
1957	1957-05-02	1957-09-27
1958	1958-05-11	1958-09-12
1959	1959-06-11	1959-09-13
1960	1960-05-11	1960-09-03
1961	1961-05-26	1961-09-05
1962	1962-06-24	1962-08-26
1963	1963-06-14	1963-10-04
1964	1964-05-19	1964-10-13
1965	1965-06-11	1965-08-12
1966	1966-05-06	1966-09-19
1967	1967-07-04	1967-09-29
1968	1968-06-19	1968-09-11
1969	1969-05-24	1969-09-13
1970	1970-06-03	1970-09-01
1971	1971-05-27	1971-09-06
1972	1972-05-30	1972-08-31
1973	1973-05-15	1973-09-29
1974	1974-06-12	1974-09-15
1975	1975-07-04	1975-09-15
1976	1976-06-30	1976-09-06
1977	1977-06-01	1977-08-19
1978	1978-06-05	1978-09-05
1979	1979-06-11	1979-09-16
1980	1980-04-20	1980-10-08
1981	1981-06-26	1981-09-19
1982	1982-05-25	1982-09-10
1983	1983-05-25	1983-09-02
1984	1984-05-29	1984-09-19
1985	1985-05-22	1985-08-25
1986	1986-05-28	1986-08-30
1987	1987-04-27	1987-09-24
1988	1988-05-16	1988-09-05
1990	1990-06-23	1990-09-25
1991	1991-07-03	1991-09-07
1993	1993-05-11	1993-08-20
1994	1994-06-20	1994-09-23
1995	1995-05-30	1995-09-04
1996	1996-06-07	1996-09-01
1997	1997-06-04	1997-09-24
1998	1998-07-08	1998-09-16
1999	1999-05-25	1999-08-30
2000	2000-06-30	2000-09-17
2001	2001-05-12	2001-09-27
2002	2002-06-16	2002-09-15
2003	2003-06-18	2003-09-06
2004	2004-07-13	2004-08-16
2005	2005-06-21	2005-08-30
2007	2007-06-21	2007-09-04
2008	2008-05-18	2008-08-26
2009	2009-05-31	2009-09-25
2010	2010-06-30	2010-08-27
2011	2011-06-29	2011-10-01
2012	2012-05-17	2012-09-19
2013	2013-05-13	2013-09-07
2014	2014-05-24	2014-09-26
2015	2015-06-09	2015-09-26
2020	2020-06-13	2020-09-06
2021	2021-05-18	2021-09-17
2022	2022-06-18	2022-09-28
2023	2023-07-04	2023-09-18
2024	2024-06-24	2024-09-26
2025	2025-05-30	2025-09-26
2026	2026-05-26	2026-09-26

Every Fixed Threshold

Fixed thresholds at Chester
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	78	64	1988	35
35 C (95 F): Days	67	14	1971	5
40 C (104 F): Days	3	1	1961	1
90 F (32.2 C): Days	77	37	1961	19
100 F (37.8 C): Days	13	5	2007	1
0 C (32 F): Ice days (max	78	94	1978	13
0 C (32 F): Frost days (min	80	233	1946	109
-10 C (14 F): Days with min	80	116	1946	34
-20 C (-4 F): Days with min	80	54	1911	9
-30 C (-22 F): Days with min	73	20	1996	1
-40 C (-40 F): Days with min	20	4	2024	1
20 C (68 F): Tropical nights (min	18	4	2007	1
10 mm (0.39 in): Days with 10 mm or more rain	81	15	1911	13
25 mm (0.98 in): Days with 25 mm or more rain	51	3	1907	2
50 mm (1.97 in): Days with 50 mm or more rain	5	1	1907	1
10 cm (3.9 in): Days with 10 cm or more snowfall	26	7	2020	3
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	2020	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1901.

Download the Data

Data for Chester 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).

Chester Threshold Days by Year (USC00241692)

Key Facts for Chester Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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