Wappapello Dam Threshold Days by Year (USC00238700)

19 fixed thresholds counted per year at Wappapello Dam (USC00238700): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Wappapello Dam Thresholds

Wappapello Dam: days with 10 mm (0.39 in) or more of precipitation in 70 years, most in 2020 with 63.
Wappapello Dam: days with 25 mm (0.98 in) or more of precipitation in 70 years, most in 1957 with 24.
Wappapello Dam: days with a maximum temperature at or above 30 C (86 F) in 65 years, most in 1953 with 117.
Wappapello Dam: days with a maximum temperature at or above 90 F (32.2 C) in 65 years, most in 1953 with 91.
19 fixed thresholds have at least one qualifying day at Wappapello Dam.

Days at or above 30 C (86 F)

65 years with a qualifying day

Days per year at Wappapello Dam with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 117 in 1953.

Days at or above 30 C (86 F) per year at Wappapello Dam
Year	Days	Decade average
1939	113	113
1940	79	82.6
1941	112	82.6
1942	81	82.6
1943	85	82.6
1944	74	82.6
1945	68	82.6
1946	75	82.6
1947	83	82.6
1948	93	82.6
1949	76	82.6
1950	52	87.1
1951	73	87.1
1952	106	87.1
1953	117	87.1
1954	107	87.1
1955	97	87.1
1956	90	87.1
1957	60	87.1
1958	81	87.1
1959	88	87.1
1960	79	80.7
1961	77	80.7
1962	91	80.7
1963	87	80.7
1964	87	80.7
1965	74	80.7
1966	61	80.7
1967	75	80.7
1968	82	80.7
1969	94	80.7
1970	88	84.3
1971	85	84.3
1972	82	84.3
1973	87	84.3
1974	65	84.3
1975	88	84.3
1976	68	84.3
1977	107	84.3
1978	95	84.3
1979	78	84.3
1980	109	93.3
1981	84	93.3
1988	87	93.3
1990	77	79.7
1991	97	79.7
1992	57	79.7
1993	78	79.7
1994	75	79.7
1995	80	79.7
1996	76	79.7
1997	80	79.7
1999	97	79.7
2002	102	86.3
2003	69	86.3
2004	90	86.3
2009	84	86.3
2010	116	80.2
2011	99	80.2
2015	63	80.2
2016	73	80.2
2017	50	80.2
2020	72	73.3
2025	68	73.3
2026	80	73.3

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

First to last qualifying date each year at Wappapello Dam
Year	First date	Last date
1939	1939-05-23	1939-10-09
1940	1940-04-02	1940-10-26
1941	1941-04-13	1941-10-10
1942	1942-05-29	1942-09-20
1943	1943-05-03	1943-09-16
1944	1944-05-27	1944-10-07
1945	1945-05-27	1945-09-24
1946	1946-04-02	1946-10-09
1947	1947-05-14	1947-10-15
1948	1948-04-07	1948-09-23
1949	1949-04-24	1949-09-18
1950	1950-05-23	1950-10-17
1951	1951-04-29	1951-10-05
1952	1952-04-29	1952-10-02
1953	1953-05-23	1953-10-18
1954	1954-04-26	1954-10-11
1955	1955-04-19	1955-09-30
1956	1956-05-13	1956-10-07
1957	1957-05-16	1957-09-21
1958	1958-05-16	1958-09-27
1959	1959-05-01	1959-09-25
1960	1960-04-24	1960-09-24
1961	1961-05-30	1961-10-12
1962	1962-05-08	1962-10-12
1963	1963-04-22	1963-10-21
1964	1964-05-18	1964-09-21
1965	1965-04-23	1965-09-19
1966	1966-05-07	1966-09-05
1967	1967-03-13	1967-10-06
1968	1968-05-01	1968-09-24
1969	1969-05-06	1969-10-05
1970	1970-05-13	1970-10-03
1971	1971-04-20	1971-10-03
1972	1972-04-14	1972-09-21
1973	1973-05-11	1973-10-04
1974	1974-05-19	1974-09-13
1975	1975-05-19	1975-10-14
1976	1976-04-24	1976-10-05
1977	1977-03-16	1977-10-02
1978	1978-04-09	1978-09-21
1979	1979-05-09	1979-10-22
1980	1980-04-22	1980-10-11
1981	1981-04-12	1981-10-06
1988	1988-05-13	1988-09-23
1990	1990-06-03	1990-09-29
1991	1991-05-16	1991-09-17
1992	1992-04-16	1992-09-15
1993	1993-05-09	1993-09-23
1994	1994-04-20	1994-10-01
1995	1995-05-14	1995-10-12
1996	1996-05-19	1996-09-12
1997	1997-05-19	1997-10-08
1999	1999-05-11	1999-10-14
2002	2002-04-16	2002-10-05
2003	2003-04-30	2003-09-25
2004	2004-05-08	2004-10-08
2009	2009-04-25	2009-09-12
2010	2010-04-14	2010-10-18
2011	2011-04-10	2011-10-17
2015	2015-05-07	2015-10-13
2016	2016-05-08	2016-10-20
2017	2017-05-18	2017-10-15
2020	2020-04-09	2020-09-12
2025	2025-06-05	2025-10-01
2026	2026-03-21	2026-09-21

Every Fixed Threshold

Fixed thresholds at Wappapello Dam
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	65	117	1953	80
35 C (95 F): Days	63	57	1953	18
40 C (104 F): Days	16	12	1980	1
90 F (32.2 C): Days	65	91	1953	44
100 F (37.8 C): Days	37	29	1980	12
110 F (43.3 C): Days	2	1	1980	1
0 C (32 F): Ice days (max	65	32	1963	11
0 C (32 F): Frost days (min	62	115	1960	47
-10 C (14 F): Days with min	60	37	1979	13
-20 C (-4 F): Days with min	6	5	1977	5
20 C (68 F): Tropical nights (min	62	102	1941	82
25 C (77 F): Days with min	28	22	1941	1
10 mm (0.39 in): Days with 10 mm or more rain	70	63	2020	20
25 mm (0.98 in): Days with 25 mm or more rain	70	24	1957	8
50 mm (1.97 in): Days with 50 mm or more rain	65	11	2015	2
100 mm (3.94 in): Days with 100 mm or more rain	18	2	1946	1
200 mm (7.87 in): Days with 200 mm or more rain	2	1	1973	1
10 cm (3.9 in): Days with 10 cm or more snowfall	19	4	1960	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1970	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1939.

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Data for Wappapello Dam 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).

Wappapello Dam Threshold Days by Year (USC00238700)

Key Facts for Wappapello Dam Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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