Rolla Missouri S&T Threshold Days by Year

21 fixed thresholds counted per year at Rolla Missouri S&T (USC00237263): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Rolla Missouri S&T Thresholds

Rolla Missouri S&T: days with 10 mm (0.39 in) or more of precipitation in 127 years, most in 1985 with 58.
Rolla Missouri S&T: days with 25 mm (0.98 in) or more of precipitation in 127 years, most in 1985 with 23.
Rolla Missouri S&T: days with 50 mm (1.97 in) or more of precipitation in 114 years, most in 1993 with 8.
Rolla Missouri S&T: nights with a minimum temperature at or below 0 C (32 F) in 111 years, most in 1917 with 127.
21 fixed thresholds have at least one qualifying day at Rolla Missouri S&T.

Days at or above 30 C (86 F)

105 years with a qualifying day

Days per year at Rolla Missouri S&T with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 107 in 1954.

Days at or above 30 C (86 F) per year at Rolla Missouri S&T
Year	Days	Decade average
1908	80	81.5
1909	83	81.5
1910	54	81.1
1911	99	81.1
1912	70	81.1
1913	99	81.1
1914	94	81.1
1915	51	81.1
1916	93	81.1
1917	72	81.1
1918	86	81.1
1919	93	81.1
1920	68	77.6
1921	96	77.6
1922	99	77.6
1923	72	77.6
1924	71	77.6
1925	102	77.6
1926	78	77.6
1927	69	77.6
1928	61	77.6
1929	60	77.6
1930	71	78.4
1931	80	78.4
1932	65	78.4
1933	85	78.4
1934	75	78.4
1935	62	78.4
1936	105	78.4
1937	78	78.4
1938	85	78.4
1939	78	78.4
1940	52	65
1941	77	65
1942	64	65
1944	89	65
1949	43	65
1950	35	71.1
1951	48	71.1
1952	67	71.1
1953	105	71.1
1954	107	71.1
1955	85	71.1
1956	99	71.1
1957	45	71.1
1958	53	71.1
1959	67	71.1
1960	68	59.1
1961	45	59.1
1962	62	59.1
1963	70	59.1
1964	72	59.1
1965	49	59.1
1966	48	59.1
1971	72	67.5
1973	66	67.5
1974	57	67.5
1975	75	67.5
1980	98	70.2
1981	60	70.2
1982	43	70.2
1983	80	70.2
1984	64	70.2
1985	55	70.2
1986	77	70.2
1987	83	70.2
1988	81	70.2
1989	61	70.2
1990	61	69.5
1991	84	69.5
1992	49	69.5
1993	67	69.5
1994	64	69.5
1995	78	69.5
1996	71	69.5
1997	63	69.5
1998	87	69.5
1999	71	69.5
2000	74	68.5
2001	71	68.5
2002	80	68.5
2003	59	68.5
2004	39	68.5
2005	90	68.5
2006	86	68.5
2007	90	68.5
2008	48	68.5
2009	48	68.5
2010	97	76.5
2011	83	76.5
2012	97	76.5
2013	58	76.5
2014	63	76.5
2015	58	76.5
2016	80	76.5
2017	64	76.5
2018	95	76.5
2019	70	76.5
2020	71	76.7
2021	70	76.7
2022	83	76.7
2023	74	76.7
2024	71	76.7
2025	78	76.7
2026	90	76.7

For each year, a bar from the first to the last day at Rolla Missouri S&T meeting 30 C (86 F).

First to last qualifying date each year at Rolla Missouri S&T
Year	First date	Last date
1908	1908-04-20	1908-10-21
1909	1909-04-17	1909-10-04
1910	1910-03-22	1910-10-01
1911	1911-03-11	1911-10-03
1912	1912-05-02	1912-10-06
1913	1913-04-17	1913-09-11
1914	1914-05-05	1914-09-17
1915	1915-04-28	1915-09-28
1916	1916-03-22	1916-10-23
1917	1917-04-24	1917-10-16
1918	1918-03-13	1918-10-07
1919	1919-04-22	1919-10-05
1920	1920-05-23	1920-09-27
1921	1921-05-19	1921-09-29
1922	1922-04-06	1922-10-28
1923	1923-04-23	1923-09-29
1924	1924-04-15	1924-09-20
1925	1925-04-21	1925-09-30
1926	1926-05-24	1926-09-24
1927	1927-04-28	1927-10-27
1928	1928-05-09	1928-10-12
1929	1929-03-23	1929-09-04
1930	1930-04-10	1930-09-22
1931	1931-05-16	1931-10-06
1932	1932-04-21	1932-09-18
1933	1933-05-11	1933-09-30
1934	1934-05-07	1934-08-19
1935	1935-05-12	1935-09-24
1936	1936-04-14	1936-09-22
1937	1937-04-17	1937-10-29
1938	1938-05-18	1938-10-17
1939	1939-05-23	1939-10-23
1940	1940-04-01	1940-10-05
1941	1941-04-13	1941-09-23
1942	1942-04-29	1942-09-18
1944	1944-05-12	1944-10-06
1949	1949-05-04	1949-10-09
1950	1950-05-05	1950-10-31
1951	1951-04-29	1951-10-13
1952	1952-04-30	1952-10-02
1953	1953-04-23	1953-10-18
1954	1954-04-06	1954-10-11
1955	1955-04-17	1955-09-30
1956	1956-04-27	1956-10-13
1957	1957-04-25	1957-09-04
1958	1958-05-15	1958-09-26
1959	1959-05-01	1959-09-23
1960	1960-04-23	1960-09-24
1961	1961-06-01	1961-09-24
1962	1962-05-08	1962-10-13
1963	1963-04-22	1963-10-16
1964	1964-05-17	1964-10-18
1965	1965-04-22	1965-09-20
1966	1966-05-08	1966-09-05
1971	1971-04-13	1971-10-01
1973	1973-06-10	1973-09-10
1974	1974-03-08	1974-08-27
1975	1975-05-19	1975-10-14
1980	1980-04-22	1980-10-10
1981	1981-04-14	1981-10-06
1982	1982-05-06	1982-09-02
1983	1983-06-14	1983-09-20
1984	1984-05-14	1984-09-14
1985	1985-05-27	1985-09-21
1986	1986-04-26	1986-09-29
1987	1987-04-20	1987-09-15
1988	1988-04-06	1988-10-18
1989	1989-04-22	1989-10-15
1990	1990-04-24	1990-09-28
1991	1991-05-15	1991-09-16
1992	1992-05-01	1992-09-18
1993	1993-05-07	1993-09-23
1994	1994-04-15	1994-10-01
1995	1995-04-09	1995-10-14
1996	1996-05-10	1996-09-23
1997	1997-05-19	1997-10-08
1998	1998-05-14	1998-09-30
1999	1999-06-05	1999-09-26
2000	2000-05-09	2000-10-04
2001	2001-04-10	2001-09-14
2002	2002-04-18	2002-10-03
2003	2003-05-07	2003-10-21
2004	2004-04-18	2004-09-15
2005	2005-05-11	2005-10-05
2006	2006-04-14	2006-10-05
2007	2007-05-01	2007-10-08
2008	2008-05-24	2008-09-13
2009	2009-04-24	2009-08-28
2010	2010-04-02	2010-10-10
2011	2011-04-04	2011-09-14
2012	2012-04-02	2012-09-26
2013	2013-05-15	2013-09-20
2014	2014-05-05	2014-10-02
2015	2015-06-08	2015-09-19
2016	2016-05-12	2016-09-26
2017	2017-05-19	2017-10-15
2018	2018-05-10	2018-10-06
2019	2019-05-17	2019-10-03
2020	2020-04-09	2020-09-10
2021	2021-05-24	2021-09-29
2022	2022-05-10	2022-09-25
2023	2023-05-08	2023-10-03
2024	2024-04-15	2024-10-13
2025	2025-04-14	2025-10-04
2026	2026-03-21	2026-10-14

Every Fixed Threshold

Fixed thresholds at Rolla Missouri S&T
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	105	107	1954	90
35 C (95 F): Days	103	58	1913	27
40 C (104 F): Days	19	15	1980	10
45 C (113 F): Days	1	1	1954	1
90 F (32.2 C): Days	105	85	1953	67
100 F (37.8 C): Days	51	27	1936	5
110 F (43.3 C): Days	1	3	1954	3
0 C (32 F): Ice days (max	105	40	1960	9
0 C (32 F): Frost days (min	111	127	1917	48
-10 C (14 F): Days with min	111	44	1917	15
-20 C (-4 F): Days with min	51	10	1983	2
-30 C (-22 F): Days with min	1	1	1912	1
20 C (68 F): Tropical nights (min	111	78	2018	73
25 C (77 F): Days with min	44	18	1954	8
10 mm (0.39 in): Days with 10 mm or more rain	127	58	1985	34
25 mm (0.98 in): Days with 25 mm or more rain	127	23	1985	18
50 mm (1.97 in): Days with 50 mm or more rain	114	8	1993	4
100 mm (3.94 in): Days with 100 mm or more rain	24	3	2015	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	1998	1
10 cm (3.9 in): Days with 10 cm or more snowfall	75	5	1912	1
25 cm (9.8 in): Days with 25 cm or more snowfall	6	1	1910	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1908.

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Data for Rolla Missouri S&T 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Rolla Missouri S&T Threshold Days by Year

Key Facts for Rolla Missouri S&T Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

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