Muscatine Threshold Days by Year (USC00135837)

20 fixed thresholds counted per year at Muscatine (USC00135837): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Muscatine Thresholds

Muscatine: days with a maximum temperature at or above 30 C (86 F) in 88 years, most in 1988 with 88.
Muscatine: days with a maximum temperature at or above 90 F (32.2 C) in 88 years, most in 1988 with 66.
Muscatine: days with a maximum temperature at or below 0 C (32 F) in 88 years, most in 1960 with 68.
Muscatine: nights with a minimum temperature at or below 0 C (32 F) in 88 years, most in 1943 with 156.
20 fixed thresholds have at least one qualifying day at Muscatine.

Days at or above 30 C (86 F)

88 years with a qualifying day

Days per year at Muscatine with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 88 in 1988.

Days at or above 30 C (86 F) per year at Muscatine
Year	Days	Decade average
1936	85	74.3
1937	69	74.3
1938	66	74.3
1939	77	74.3
1940	59	60.6
1941	72	60.6
1942	55	60.6
1943	62	60.6
1944	77	60.6
1945	40	60.6
1946	48	60.6
1948	65	60.6
1949	67	60.6
1950	44	57.8
1951	42	57.8
1952	69	57.8
1953	78	57.8
1954	67	57.8
1955	70	57.8
1956	65	57.8
1957	55	57.8
1958	28	57.8
1959	60	57.8
1960	39	42.9
1961	42	42.9
1962	43	42.9
1963	60	42.9
1964	48	42.9
1965	33	42.9
1966	50	42.9
1967	25	42.9
1968	46	42.9
1969	43	42.9
1970	45	45.8
1971	61	45.8
1972	46	45.8
1973	40	45.8
1974	29	45.8
1975	55	45.8
1976	41	45.8
1977	47	45.8
1978	48	45.8
1979	46	45.8
1980	59	64.6
1983	76	64.6
1984	60	64.6
1985	54	64.6
1986	48	64.6
1987	82	64.6
1988	88	64.6
1989	50	64.6
1990	40	46.8
1991	74	46.8
1992	24	46.8
1993	33	46.8
1994	49	46.8
1995	61	46.8
1996	39	46.8
1997	46	46.8
1998	49	46.8
1999	53	46.8
2000	40	45.1
2001	51	45.1
2002	61	45.1
2003	46	45.1
2004	31	45.1
2005	68	45.1
2006	49	45.1
2007	65	45.1
2008	28	45.1
2009	12	45.1
2010	59	55.4
2011	66	55.4
2012	79	55.4
2013	51	55.4
2014	34	55.4
2015	35	55.4
2016	59	55.4
2017	51	55.4
2018	66	55.4
2019	54	55.4
2020	59	55.7
2021	70	55.7
2022	45	55.7
2023	58	55.7
2024	54	55.7
2025	65	55.7
2026	39	55.7

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

First to last qualifying date each year at Muscatine
Year	First date	Last date
1936	1936-05-06	1936-09-22
1937	1937-05-29	1937-10-05
1938	1938-05-03	1938-10-14
1939	1939-05-05	1939-10-07
1940	1940-06-01	1940-09-21
1941	1941-05-15	1941-09-23
1942	1942-04-29	1942-10-08
1943	1943-05-05	1943-09-05
1944	1944-05-12	1944-09-27
1945	1945-06-22	1945-09-09
1946	1946-05-28	1946-09-27
1948	1948-05-20	1948-09-19
1949	1949-05-03	1949-10-08
1950	1950-05-23	1950-10-31
1951	1951-05-01	1951-09-26
1952	1952-04-28	1952-09-30
1953	1953-05-25	1953-10-18
1954	1954-04-24	1954-10-03
1955	1955-05-03	1955-09-18
1956	1956-05-11	1956-09-26
1957	1957-05-01	1957-09-19
1958	1958-05-11	1958-08-30
1959	1959-05-02	1959-09-22
1960	1960-06-04	1960-09-08
1961	1961-05-31	1961-09-10
1962	1962-05-16	1962-10-11
1963	1963-05-08	1963-10-15
1964	1964-05-16	1964-09-20
1965	1965-05-07	1965-09-19
1966	1966-05-05	1966-09-11
1967	1967-05-18	1967-10-04
1968	1968-05-02	1968-09-03
1969	1969-05-03	1969-10-04
1970	1970-04-28	1970-09-20
1971	1971-05-17	1971-10-01
1972	1972-05-18	1972-09-20
1973	1973-06-08	1973-09-02
1974	1974-06-14	1974-08-26
1975	1975-05-18	1975-10-13
1976	1976-06-07	1976-10-02
1977	1977-04-16	1977-08-27
1978	1978-05-25	1978-09-19
1979	1979-05-08	1979-09-28
1980	1980-04-22	1980-09-20
1983	1983-06-09	1983-09-19
1984	1984-05-18	1984-09-24
1985	1985-04-18	1985-09-20
1986	1986-03-29	1986-09-28
1987	1987-04-20	1987-09-05
1988	1988-05-07	1988-09-22
1989	1989-04-25	1989-08-27
1990	1990-04-24	1990-10-06
1991	1991-04-06	1991-09-17
1992	1992-04-30	1992-09-16
1993	1993-05-08	1993-09-12
1994	1994-04-18	1994-09-30
1995	1995-06-06	1995-09-13
1996	1996-05-17	1996-09-05
1997	1997-05-18	1997-10-07
1998	1998-05-14	1998-09-26
1999	1999-05-28	1999-10-15
2000	2000-05-08	2000-09-18
2001	2001-05-15	2001-09-07
2002	2002-04-15	2002-09-30
2003	2003-04-14	2003-09-11
2004	2004-04-16	2004-09-19
2005	2005-06-06	2005-10-05
2006	2006-04-13	2006-10-04
2007	2007-04-29	2007-10-07
2008	2008-06-01	2008-09-02
2009	2009-06-18	2009-08-09
2010	2010-05-23	2010-10-09
2011	2011-05-10	2011-09-13
2012	2012-05-15	2012-09-12
2013	2013-04-30	2013-10-03
2014	2014-05-08	2014-09-05
2015	2015-06-05	2015-09-24
2016	2016-05-07	2016-10-18
2017	2017-05-16	2017-10-03
2018	2018-05-24	2018-10-04
2019	2019-05-17	2019-10-02
2020	2020-05-26	2020-09-17
2021	2021-04-28	2021-10-02
2022	2022-05-11	2022-09-21
2023	2023-05-08	2023-10-04
2024	2024-05-13	2024-10-12
2025	2025-04-29	2025-10-06
2026	2026-03-22	2026-08-13

Every Fixed Threshold

Fixed thresholds at Muscatine
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	88	88	1988	39
35 C (95 F): Days	72	40	1936	1
40 C (104 F): Days	7	14	1936	1
90 F (32.2 C): Days	88	66	1988	16
100 F (37.8 C): Days	23	23	1936	1
110 F (43.3 C): Days	1	2	1936	2
0 C (32 F): Ice days (max	88	68	1960	24
0 C (32 F): Frost days (min	88	156	1943	72
-10 C (14 F): Days with min	88	70	2014	27
-20 C (-4 F): Days with min	85	31	1936	4
-30 C (-22 F): Days with min	11	4	1996	3
20 C (68 F): Tropical nights (min	88	49	2010	26
25 C (77 F): Days with min	44	12	1988	1
10 mm (0.39 in): Days with 10 mm or more rain	88	43	2009	29
25 mm (0.98 in): Days with 25 mm or more rain	88	21	1993	13
50 mm (1.97 in): Days with 50 mm or more rain	69	6	1993	3
100 mm (3.94 in): Days with 100 mm or more rain	11	1	1948	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	1967	1
10 cm (3.9 in): Days with 10 cm or more snowfall	73	6	1951	1
25 cm (9.8 in): Days with 25 cm or more snowfall	6	1	1959	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1936.

Download the Data

Data for Muscatine 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).

Muscatine Threshold Days by Year (USC00135837)

Key Facts for Muscatine Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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