Ipswich Threshold Days by Year (USC00394206)

21 fixed thresholds counted per year at Ipswich (USC00394206): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ipswich Thresholds

Ipswich: days with 10 mm (0.39 in) or more of precipitation in 107 years, most in 2019 with 24.
Ipswich: days with 25 mm (0.98 in) or more of precipitation in 102 years, most in 1964 with 8.
Ipswich: nights with a minimum temperature at or below 0 C (32 F) in 100 years, most in 1907 with 210.
Ipswich: nights with a minimum temperature at or below -10 C (14 F) in 100 years, most in 1978 with 113.
21 fixed thresholds have at least one qualifying day at Ipswich.

Days at or above 30 C (86 F)

91 years with a qualifying day

Days per year at Ipswich with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 87 in 1934.

Days at or above 30 C (86 F) per year at Ipswich
Year	Days	Decade average
1900	73	39.6
1901	74	39.6
1902	36	39.6
1903	23	39.6
1904	22	39.6
1905	27	39.6
1906	33	39.6
1907	30	39.6
1909	38	39.6
1911	38	35.9
1912	36	35.9
1914	47	35.9
1915	10	35.9
1916	38	35.9
1917	38	35.9
1918	37	35.9
1919	43	35.9
1921	59	46.5
1922	58	46.5
1923	35	46.5
1924	22	46.5
1925	49	46.5
1926	54	46.5
1927	37	46.5
1929	58	46.5
1931	79	72.1
1932	46	72.1
1934	87	72.1
1935	60	72.1
1936	81	72.1
1937	68	72.1
1938	69	72.1
1939	87	72.1
1940	69	64.3
1941	60	64.3
1942	55	64.3
1943	73	64.3
1963	37	41.6
1964	42	41.6
1965	31	41.6
1966	58	41.6
1967	44	41.6
1968	35	41.6
1969	44	41.6
1970	80	53.3
1971	45	53.3
1972	42	53.3
1973	63	53.3
1974	56	53.3
1975	52	53.3
1976	69	53.3
1977	40	53.3
1978	49	53.3
1979	37	53.3
1980	66	60.5
1981	49	60.5
1988	75	60.5
1989	52	60.5
1990	42	28.4
1991	36	28.4
1992	16	28.4
1996	25	28.4
1997	28	28.4
1998	28	28.4
1999	24	28.4
2000	25	33.1
2001	41	33.1
2002	48	33.1
2003	35	33.1
2004	22	33.1
2005	41	33.1
2006	52	33.1
2007	38	33.1
2008	15	33.1
2009	14	33.1
2010	34	31.6
2011	27	31.6
2012	47	31.6
2013	28	31.6
2014	7	31.6
2015	31	31.6
2016	33	31.6
2017	36	31.6
2018	47	31.6
2019	26	31.6
2020	47	42.8
2021	58	42.8
2022	44	42.8
2023	42	42.8
2024	31	42.8
2025	35	42.8

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

First to last qualifying date each year at Ipswich
Year	First date	Last date
1900	1900-04-20	1900-09-09
1901	1901-04-26	1901-09-05
1902	1902-04-20	1902-09-07
1903	1903-06-18	1903-08-21
1904	1904-07-09	1904-09-26
1905	1905-06-04	1905-10-06
1906	1906-04-24	1906-09-22
1907	1907-06-15	1907-08-28
1909	1909-05-04	1909-10-06
1911	1911-05-08	1911-09-02
1912	1912-05-30	1912-10-04
1914	1914-06-03	1914-10-18
1915	1915-05-10	1915-09-05
1916	1916-05-06	1916-08-18
1917	1917-05-16	1917-09-23
1918	1918-05-04	1918-09-12
1919	1919-06-16	1919-09-17
1921	1921-04-03	1921-09-03
1922	1922-06-04	1922-10-26
1923	1923-04-19	1923-09-15
1924	1924-07-10	1924-09-24
1925	1925-05-19	1925-09-19
1926	1926-04-15	1926-09-16
1927	1927-06-19	1927-10-21
1929	1929-05-25	1929-10-05
1931	1931-05-15	1931-10-02
1932	1932-05-13	1932-09-15
1934	1934-04-28	1934-10-11
1935	1935-06-08	1935-09-23
1936	1936-05-05	1936-09-22
1937	1937-05-28	1937-10-03
1938	1938-06-05	1938-10-03
1939	1939-04-23	1939-09-22
1940	1940-05-11	1940-09-27
1941	1941-05-13	1941-09-21
1942	1942-04-14	1942-10-08
1943	1943-04-24	1943-10-10
1963	1963-05-07	1963-10-05
1964	1964-05-20	1964-09-09
1965	1965-04-29	1965-08-24
1966	1966-05-04	1966-10-07
1967	1967-05-22	1967-09-25
1968	1968-04-30	1968-09-14
1969	1969-05-14	1969-09-15
1970	1970-05-07	1970-10-06
1971	1971-06-18	1971-09-14
1972	1972-05-16	1972-09-20
1973	1973-06-01	1973-09-02
1974	1974-06-03	1974-09-27
1975	1975-05-16	1975-10-07
1976	1976-06-05	1976-10-01
1977	1977-04-09	1977-09-08
1978	1978-06-15	1978-09-26
1979	1979-05-28	1979-09-27
1980	1980-04-20	1980-10-07
1981	1981-06-06	1981-09-13
1988	1988-05-12	1988-09-11
1989	1989-06-06	1989-09-30
1990	1990-04-22	1990-10-05
1991	1991-05-14	1991-10-16
1992	1992-04-30	1992-10-02
1996	1996-06-10	1996-09-05
1997	1997-05-17	1997-10-02
1998	1998-07-09	1998-09-18
1999	1999-06-08	1999-08-31
2000	2000-05-04	2000-08-30
2001	2001-04-28	2001-09-06
2002	2002-05-28	2002-09-17
2003	2003-04-13	2003-10-19
2004	2004-04-28	2004-09-19
2005	2005-05-20	2005-10-01
2006	2006-05-18	2006-10-07
2007	2007-05-13	2007-09-29
2008	2008-07-01	2008-08-31
2009	2009-04-23	2009-08-13
2010	2010-05-28	2010-08-30
2011	2011-06-06	2011-09-28
2012	2012-04-24	2012-09-15
2013	2013-05-13	2013-09-22
2014	2014-05-29	2014-07-21
2015	2015-06-08	2015-10-11
2016	2016-05-05	2016-09-03
2017	2017-05-07	2017-09-22
2018	2018-05-16	2018-09-16
2019	2019-05-31	2019-09-17
2020	2020-06-01	2020-09-02
2021	2021-06-02	2021-09-27
2022	2022-06-11	2022-09-19
2023	2023-05-23	2023-10-01
2024	2024-04-13	2024-10-10
2025	2025-05-10	2025-08-21

Every Fixed Threshold

Fixed thresholds at Ipswich
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	91	87	1934	35
35 C (95 F): Days	84	44	1936	4
40 C (104 F): Days	33	15	1936	4
45 C (113 F): Days	4	2	1901	1
90 F (32.2 C): Days	90	71	1936	15
100 F (37.8 C): Days	60	27	1936	1
110 F (43.3 C): Days	9	4	1936	1
0 C (32 F): Ice days (max	91	108	1978	41
0 C (32 F): Frost days (min	100	210	1907	102
-10 C (14 F): Days with min	100	113	1978	52
-20 C (-4 F): Days with min	100	61	1978	28
-30 C (-22 F): Days with min	83	22	1936	5
-40 C (-40 F): Days with min	3	1	1912	1
20 C (68 F): Tropical nights (min	88	15	1936	6
25 C (77 F): Days with min	7	3	1936	1
10 mm (0.39 in): Days with 10 mm or more rain	107	24	2019	15
25 mm (0.98 in): Days with 25 mm or more rain	102	8	1964	6
50 mm (1.97 in): Days with 50 mm or more rain	42	3	1915	1
100 mm (3.94 in): Days with 100 mm or more rain	4	1	1915	1
10 cm (3.9 in): Days with 10 cm or more snowfall	65	10	2019	1
25 cm (9.8 in): Days with 25 cm or more snowfall	8	1	1937	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1900.

Download the Data

Data for Ipswich 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).

Ipswich Threshold Days by Year (USC00394206)

Key Facts for Ipswich Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related