Rocky Mt Threshold Days by Year (USC00447338)

16 fixed thresholds counted per year at Rocky Mt (USC00447338): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Rocky Mt Thresholds

Rocky Mt: days with a maximum temperature at or above 30 C (86 F) in 103 years, most in 1911 with 97.
Rocky Mt: days with a maximum temperature at or above 90 F (32.2 C) in 101 years, most in 1943 with 74.
Rocky Mt: days with 10 mm (0.39 in) or more of precipitation in 99 years, most in 1898 with 50.
Rocky Mt: days with 25 mm (0.98 in) or more of precipitation in 99 years, most in 2020 with 25.
16 fixed thresholds have at least one qualifying day at Rocky Mt.

Days at or above 30 C (86 F)

103 years with a qualifying day

Days per year at Rocky Mt with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 97 in 1911.

Days at or above 30 C (86 F) per year at Rocky Mt
Year	Days	Decade average
1895	63	65.6
1896	54	65.6
1897	58	65.6
1898	72	65.6
1899	81	65.6
1900	69	55.2
1903	11	55.2
1906	84	55.2
1907	64	55.2
1908	55	55.2
1909	48	55.2
1910	52	64.1
1911	97	64.1
1912	67	64.1
1913	67	64.1
1914	84	64.1
1915	56	64.1
1916	49	64.1
1917	60	64.1
1918	45	64.1
1919	64	64.1
1920	3	36.1
1921	43	36.1
1922	28	36.1
1923	16	36.1
1924	17	36.1
1925	65	36.1
1926	30	36.1
1927	54	36.1
1928	49	36.1
1929	56	36.1
1930	88	79.1
1931	71	79.1
1932	88	79.1
1933	54	79.1
1934	75	79.1
1935	71	79.1
1936	91	79.1
1939	95	79.1
1940	58	69.8
1943	93	69.8
1944	72	69.8
1945	56	69.8
1954	68	62
1955	50	62
1956	68	62
1960	45	54.8
1962	64	54.8
1963	63	54.8
1964	58	54.8
1965	66	54.8
1966	60	54.8
1967	43	54.8
1968	52	54.8
1969	42	54.8
1970	68	47.8
1971	38	47.8
1972	34	47.8
1973	51	47.8
1974	37	47.8
1975	39	47.8
1976	47	47.8
1977	69	47.8
1978	59	47.8
1979	36	47.8
1980	51	59.3
1981	51	59.3
1982	46	59.3
1983	73	59.3
1984	51	59.3
1985	52	59.3
1986	73	59.3
1987	73	59.3
1988	64	59.3
1991	57	52
1992	32	52
1993	59	52
1994	48	52
1996	44	52
1997	48	52
1998	76	52
2002	74	55.3
2004	40	55.3
2005	51	55.3
2006	57	55.3
2007	71	55.3
2008	52	55.3
2009	42	55.3
2010	86	68.6
2011	78	68.6
2012	57	68.6
2013	47	68.6
2014	46	68.6
2015	72	68.6
2016	75	68.6
2017	61	68.6
2019	95	68.6
2020	62	57.8
2021	69	57.8
2022	65	57.8
2023	39	57.8
2024	50	57.8
2026	62	57.8

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

First to last qualifying date each year at Rocky Mt
Year	First date	Last date
1895	1895-05-05	1895-09-26
1896	1896-04-16	1896-09-19
1897	1897-04-25	1897-09-16
1898	1898-05-02	1898-09-30
1899	1899-05-01	1899-09-09
1900	1900-05-08	1900-11-29
1903	1903-05-24	1903-08-28
1906	1906-04-25	1906-09-22
1907	1907-03-22	1907-09-21
1908	1908-04-24	1908-09-24
1909	1909-04-05	1909-08-31
1910	1910-03-25	1910-09-08
1911	1911-05-10	1911-10-07
1912	1912-03-21	1912-10-10
1913	1913-04-23	1913-09-06
1914	1914-04-27	1914-09-24
1915	1915-04-19	1915-09-22
1916	1916-04-13	1916-10-07
1917	1917-04-18	1917-09-21
1918	1918-05-05	1918-10-06
1919	1919-05-30	1919-10-11
1920	1920-06-11	1920-07-24
1921	1921-03-21	1921-09-17
1922	1922-04-10	1922-10-08
1923	1923-06-06	1923-08-15
1924	1924-06-19	1924-09-01
1925	1925-04-24	1925-09-22
1926	1926-05-08	1926-09-12
1927	1927-04-20	1927-10-01
1928	1928-05-04	1928-09-19
1929	1929-04-05	1929-09-29
1930	1930-04-11	1930-09-26
1931	1931-05-16	1931-10-08
1932	1932-05-05	1932-09-13
1933	1933-05-13	1933-10-13
1934	1934-04-03	1934-09-27
1935	1935-05-02	1935-09-29
1936	1936-04-14	1936-09-28
1939	1939-04-24	1939-10-10
1940	1940-05-06	1940-10-27
1943	1943-05-06	1943-09-16
1944	1944-05-03	1944-09-21
1945	1945-03-29	1945-09-26
1954	1954-05-02	1954-10-06
1955	1955-04-19	1955-09-20
1956	1956-05-12	1956-09-17
1960	1960-04-23	1960-09-05
1962	1962-05-02	1962-10-12
1963	1963-04-03	1963-09-21
1964	1964-05-09	1964-09-12
1965	1965-05-02	1965-09-22
1966	1966-05-22	1966-09-05
1967	1967-04-17	1967-09-01
1968	1968-03-22	1968-09-26
1969	1969-05-05	1969-09-07
1970	1970-04-30	1970-09-27
1971	1971-04-14	1971-09-10
1972	1972-06-05	1972-09-27
1973	1973-06-04	1973-09-29
1974	1974-04-29	1974-09-14
1975	1975-05-22	1975-09-05
1976	1976-04-17	1976-09-10
1977	1977-04-13	1977-09-26
1978	1978-05-27	1978-09-23
1979	1979-05-12	1979-09-07
1980	1980-04-24	1980-09-24
1981	1981-04-29	1981-09-15
1982	1982-05-14	1982-09-19
1983	1983-06-13	1983-09-20
1984	1984-04-28	1984-09-26
1985	1985-04-20	1985-09-11
1986	1986-04-28	1986-10-05
1987	1987-05-18	1987-09-18
1988	1988-05-24	1988-09-24
1991	1991-05-27	1991-10-04
1992	1992-05-02	1992-09-18
1993	1993-06-08	1993-09-15
1994	1994-04-19	1994-10-01
1996	1996-05-04	1996-09-09
1997	1997-05-18	1997-09-20
1998	1998-03-29	1998-09-30
2002	2002-04-15	2002-10-03
2004	2004-04-18	2004-08-29
2005	2005-05-11	2005-09-24
2006	2006-05-25	2006-08-29
2007	2007-04-30	2007-10-10
2008	2008-06-01	2008-09-20
2009	2009-04-25	2009-09-25
2010	2010-04-02	2010-10-12
2011	2011-04-25	2011-09-15
2012	2012-05-03	2012-09-08
2013	2013-04-10	2013-10-06
2014	2014-05-09	2014-09-12
2015	2015-05-13	2015-09-20
2016	2016-04-19	2016-10-20
2017	2017-04-30	2017-10-10
2019	2019-05-01	2019-10-05
2020	2020-03-30	2020-10-22
2021	2021-04-29	2021-09-20
2022	2022-04-26	2022-08-31
2023	2023-04-21	2023-09-08
2024	2024-04-16	2024-09-01
2026	2026-03-24	2026-10-02

Every Fixed Threshold

Fixed thresholds at Rocky Mt
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	103	97	1911	62
35 C (95 F): Days	74	32	1930	8
90 F (32.2 C): Days	101	74	1943	29
100 F (37.8 C): Days	20	8	1930	4
0 C (32 F): Ice days (max	95	20	1903	8
0 C (32 F): Frost days (min	93	130	1944	57
-10 C (14 F): Days with min	89	29	1977	14
-20 C (-4 F): Days with min	7	2	1977	2
20 C (68 F): Tropical nights (min	93	54	1896	20
25 C (77 F): Days with min	16	8	1900	2
10 mm (0.39 in): Days with 10 mm or more rain	99	50	1898	30
25 mm (0.98 in): Days with 25 mm or more rain	99	25	2020	6
50 mm (1.97 in): Days with 50 mm or more rain	93	9	2020	2
100 mm (3.94 in): Days with 100 mm or more rain	21	2	1964	1
10 cm (3.9 in): Days with 10 cm or more snowfall	51	6	1966	2
25 cm (9.8 in): Days with 25 cm or more snowfall	12	3	1996	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1895.

Download the Data

Data for Rocky Mt 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).

Rocky Mt Threshold Days by Year (USC00447338)

Key Facts for Rocky Mt Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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