Des Moines Threshold Days by Year (USC00292453)

15 fixed thresholds counted per year at Des Moines (USC00292453): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Des Moines Thresholds

Des Moines: days with 10 mm (0.39 in) or more of precipitation in 70 years, most in 1918 with 26.
Des Moines: days with a maximum temperature at or above 30 C (86 F) in 68 years, most in 1934 with 68.
Des Moines: days with a maximum temperature at or below 0 C (32 F) in 68 years, most in 1973 with 26.
Des Moines: days with 10 cm (3.9 in) or more of snowfall in 67 years, most in 1957 with 8.
15 fixed thresholds have at least one qualifying day at Des Moines.

Days at or above 30 C (86 F)

68 years with a qualifying day

Days per year at Des Moines with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 68 in 1934.

Days at or above 30 C (86 F) per year at Des Moines
Year	Days	Decade average
1917	66	47.7
1918	56	47.7
1919	21	47.7
1920	44	24.2
1921	13	24.2
1924	46	24.2
1925	19	24.2
1928	16	24.2
1929	7	24.2
1930	15	43.1
1931	17	43.1
1932	41	43.1
1933	58	43.1
1934	68	43.1
1935	42	43.1
1936	45	43.1
1937	58	43.1
1938	36	43.1
1939	51	43.1
1940	41	29.8
1941	7	29.8
1942	25	29.8
1944	25	29.8
1945	30	29.8
1946	51	29.8
1951	28	43.2
1952	49	43.2
1953	53	43.2
1954	60	43.2
1955	30	43.2
1956	56	43.2
1957	35	43.2
1958	39	43.2
1959	39	43.2
1960	54	30.5
1961	26	30.5
1962	42	30.5
1963	43	30.5
1964	53	30.5
1965	11	30.5
1966	28	30.5
1967	8	30.5
1968	22	30.5
1969	18	30.5
1970	30	25.7
1971	32	25.7
1972	18	25.7
1973	20	25.7
1974	24	25.7
1975	20	25.7
1976	24	25.7
1977	26	25.7
1978	41	25.7
1979	22	25.7
1980	54	26.9
1981	30	26.9
1982	18	26.9
1983	41	26.9
1984	20	26.9
1985	32	26.9
1986	12	26.9
1987	20	26.9
1988	21	26.9
1989	21	26.9
1990	33	17.5
1991	10	17.5
1992	6	17.5
1993	21	17.5

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

First to last qualifying date each year at Des Moines
Year	First date	Last date
1917	1917-06-09	1917-10-16
1918	1918-05-06	1918-08-29
1919	1919-07-07	1919-09-01
1920	1920-06-07	1920-09-18
1921	1921-06-29	1921-09-14
1924	1924-06-11	1924-10-12
1925	1925-04-13	1925-07-19
1928	1928-05-01	1928-07-10
1929	1929-06-22	1929-07-18
1930	1930-06-21	1930-08-22
1931	1931-06-17	1931-09-25
1932	1932-07-04	1932-09-15
1933	1933-06-01	1933-09-21
1934	1934-05-09	1934-09-01
1935	1935-06-10	1935-09-18
1936	1936-06-07	1936-09-10
1937	1937-06-12	1937-09-02
1938	1938-06-04	1938-08-30
1939	1939-05-22	1939-09-07
1940	1940-06-01	1940-09-05
1941	1941-05-13	1941-09-03
1942	1942-05-26	1942-08-29
1944	1944-06-18	1944-09-23
1945	1945-06-13	1945-10-07
1946	1946-06-04	1946-09-04
1951	1951-05-29	1951-08-20
1952	1952-06-08	1952-08-21
1953	1953-05-22	1953-09-28
1954	1954-06-06	1954-10-06
1955	1955-06-24	1955-09-16
1956	1956-05-09	1956-09-20
1957	1957-06-15	1957-09-08
1958	1958-05-11	1958-09-20
1959	1959-06-10	1959-09-08
1960	1960-06-02	1960-09-14
1961	1961-05-11	1961-08-24
1962	1962-05-10	1962-10-14
1963	1963-05-08	1963-09-19
1964	1964-05-22	1964-09-08
1965	1965-06-29	1965-08-12
1966	1966-05-07	1966-08-17
1967	1967-05-23	1967-08-25
1968	1968-05-30	1968-08-07
1969	1969-06-28	1969-08-20
1970	1970-06-13	1970-09-11
1971	1971-06-16	1971-09-13
1972	1972-06-21	1972-08-12
1973	1973-06-24	1973-08-25
1974	1974-05-27	1974-09-11
1975	1975-06-06	1975-09-01
1976	1976-06-20	1976-09-04
1977	1977-06-08	1977-09-08
1978	1978-06-13	1978-09-10
1979	1979-06-22	1979-08-09
1980	1980-06-05	1980-08-25
1981	1981-06-07	1981-08-06
1982	1982-06-28	1982-09-04
1983	1983-06-18	1983-09-19
1984	1984-05-24	1984-09-12
1985	1985-06-07	1985-09-01
1986	1986-07-04	1986-09-05
1987	1987-06-22	1987-08-22
1988	1988-06-07	1988-09-07
1989	1989-05-23	1989-08-05
1990	1990-06-05	1990-09-14
1991	1991-06-25	1991-08-16
1992	1992-07-05	1992-08-09
1993	1993-06-02	1993-08-10

Every Fixed Threshold

Fixed thresholds at Des Moines
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	68	68	1934	21
35 C (95 F): Days	26	17	1918	1
90 F (32.2 C): Days	63	47	1934	5
100 F (37.8 C): Days	1	4	1918	4
0 C (32 F): Ice days (max	68	26	1973	12
0 C (32 F): Frost days (min	66	186	1935	168
-10 C (14 F): Days with min	66	64	1932	34
-20 C (-4 F): Days with min	56	8	1960	1
-30 C (-22 F): Days with min	4	2	1963	2
20 C (68 F): Tropical nights (min	23	4	1980	1
10 mm (0.39 in): Days with 10 mm or more rain	70	26	1918	21
25 mm (0.98 in): Days with 25 mm or more rain	64	8	1941	3
50 mm (1.97 in): Days with 50 mm or more rain	23	3	1946	1
10 cm (3.9 in): Days with 10 cm or more snowfall	67	8	1957	3
25 cm (9.8 in): Days with 25 cm or more snowfall	11	2	1928	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.

Download the Data

Data for Des Moines 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).

Des Moines Threshold Days by Year (USC00292453)

Key Facts for Des Moines Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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