Boonville Threshold Days by Year (USC00230817)

19 fixed thresholds counted per year at Boonville (USC00230817): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Boonville Thresholds

Boonville: days with 10 mm (0.39 in) or more of precipitation in 68 years, most in 1973 with 50.
Boonville: days with 25 mm (0.98 in) or more of precipitation in 68 years, most in 1984 with 25.
Boonville: days with a maximum temperature at or above 30 C (86 F) in 66 years, most in 2002 with 99.
Boonville: days with a maximum temperature at or above 90 F (32.2 C) in 66 years, most in 2002 with 72.
19 fixed thresholds have at least one qualifying day at Boonville.

Days at or above 30 C (86 F)

66 years with a qualifying day

Days per year at Boonville with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 99 in 2002.

Days at or above 30 C (86 F) per year at Boonville
Year	Days	Decade average
1938	91	86.5
1939	82	86.5
1940	61	55.8
1941	69	55.8
1942	51	55.8
1943	62	55.8
1944	59	55.8
1945	41	55.8
1946	58	55.8
1947	64	55.8
1948	44	55.8
1949	49	55.8
1950	30	69.1
1951	40	69.1
1952	86	69.1
1953	90	69.1
1954	82	69.1
1955	75	69.1
1956	92	69.1
1957	57	69.1
1958	51	69.1
1959	88	69.1
1960	66	61.9
1961	48	61.9
1962	81	61.9
1963	86	61.9
1964	74	61.9
1965	57	61.9
1966	48	61.9
1967	45	61.9
1968	55	61.9
1969	59	61.9
1970	58	66.2
1971	75	66.2
1972	65	66.2
1973	62	66.2
1974	55	66.2
1975	73	66.2
1976	70	66.2
1978	78	66.2
1979	60	66.2
1980	96	73.6
1981	58	73.6
1982	49	73.6
1983	85	73.6
1984	79	73.6
1985	59	73.6
1986	77	73.6
1987	87	73.6
1988	92	73.6
1989	54	73.6
1990	61	71.2
1991	78	71.2
1992	39	71.2
1993	65	71.2
1994	73	71.2
1995	74	71.2
1996	71	71.2
1997	74	71.2
1998	95	71.2
1999	82	71.2
2000	85	81.8
2001	90	81.8
2002	99	81.8
2003	78	81.8
2004	57	81.8

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

First to last qualifying date each year at Boonville
Year	First date	Last date
1938	1938-05-18	1938-10-17
1939	1939-05-17	1939-10-25
1940	1940-05-05	1940-10-26
1941	1941-05-14	1941-09-23
1942	1942-04-04	1942-09-18
1943	1943-05-05	1943-09-05
1944	1944-05-14	1944-09-20
1945	1945-05-20	1945-09-09
1946	1946-04-01	1946-10-07
1947	1947-06-07	1947-10-15
1948	1948-04-19	1948-09-21
1949	1949-05-04	1949-08-19
1950	1950-05-24	1950-11-01
1951	1951-04-29	1951-10-05
1952	1952-04-30	1952-10-26
1953	1953-05-25	1953-10-04
1954	1954-06-11	1954-10-04
1955	1955-05-04	1955-09-22
1956	1956-04-28	1956-10-26
1957	1957-06-07	1957-09-20
1958	1958-04-24	1958-09-25
1959	1959-05-01	1959-09-28
1960	1960-04-23	1960-10-12
1961	1961-06-01	1961-09-12
1962	1962-04-30	1962-10-12
1963	1963-05-09	1963-10-21
1964	1964-05-17	1964-09-20
1965	1965-04-23	1965-09-20
1966	1966-05-08	1966-09-03
1967	1967-05-19	1967-10-05
1968	1968-05-03	1968-10-16
1969	1969-05-29	1969-10-05
1970	1970-04-28	1970-09-22
1971	1971-04-13	1971-10-02
1972	1972-04-13	1972-09-21
1973	1973-06-10	1973-09-22
1974	1974-05-17	1974-08-27
1975	1975-04-28	1975-10-14
1976	1976-06-13	1976-10-04
1978	1978-05-25	1978-10-23
1979	1979-05-08	1979-10-22
1980	1980-04-22	1980-10-09
1981	1981-04-11	1981-10-06
1982	1982-05-05	1982-10-06
1983	1983-05-07	1983-10-04
1984	1984-04-26	1984-09-25
1985	1985-04-18	1985-09-20
1986	1986-03-30	1986-09-29
1987	1987-04-20	1987-09-27
1988	1988-05-12	1988-10-18
1989	1989-04-23	1989-10-15
1990	1990-04-24	1990-10-07
1991	1991-05-14	1991-09-16
1992	1992-06-14	1992-09-18
1993	1993-05-09	1993-09-13
1994	1994-04-15	1994-10-02
1995	1995-05-14	1995-10-13
1996	1996-04-12	1996-09-08
1997	1997-05-18	1997-10-08
1998	1998-05-13	1998-09-30
1999	1999-05-11	1999-10-28
2000	2000-05-09	2000-10-04
2001	2001-04-09	2001-09-14
2002	2002-04-16	2002-10-02
2003	2003-04-15	2003-09-19
2004	2004-04-17	2004-09-20

Every Fixed Threshold

Fixed thresholds at Boonville
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	66	99	2002	57
35 C (95 F): Days	62	47	1980	4
40 C (104 F): Days	12	14	1980	6
90 F (32.2 C): Days	66	72	2002	24
100 F (37.8 C): Days	39	26	1980	8
110 F (43.3 C): Days	2	1	1954	1
0 C (32 F): Ice days (max	66	52	1978	26
0 C (32 F): Frost days (min	66	133	1943	82
-10 C (14 F): Days with min	66	52	1978	22
-20 C (-4 F): Days with min	41	15	1979	2
-30 C (-22 F): Days with min	1	2	1989	2
20 C (68 F): Tropical nights (min	66	75	1998	29
25 C (77 F): Days with min	37	18	1980	1
10 mm (0.39 in): Days with 10 mm or more rain	68	50	1973	24
25 mm (0.98 in): Days with 25 mm or more rain	68	25	1984	8
50 mm (1.97 in): Days with 50 mm or more rain	60	11	1983	3
100 mm (3.94 in): Days with 100 mm or more rain	13	2	1942	1
10 cm (3.9 in): Days with 10 cm or more snowfall	52	5	1947	1
25 cm (9.8 in): Days with 25 cm or more snowfall	5	1	1938	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1938.

Download the Data

Data for Boonville 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).

Boonville Threshold Days by Year (USC00230817)

Key Facts for Boonville Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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