Lewistown AP Threshold Days by Year (USW00024036)

19 fixed thresholds counted per year at Lewistown AP (USW00024036): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Lewistown AP Thresholds

Lewistown AP: days with 10 mm (0.39 in) or more of precipitation in 125 years, most in 1903 with 23.
Lewistown AP: days with a maximum temperature at or above 30 C (86 F) in 123 years, most in 1919 with 58.
Lewistown AP: days with a maximum temperature at or above 90 F (32.2 C) in 123 years, most in 1936 with 35.
Lewistown AP: days with a maximum temperature at or below 0 C (32 F) in 123 years, most in 1978 with 92.
19 fixed thresholds have at least one qualifying day at Lewistown AP.

Days at or above 30 C (86 F)

123 years with a qualifying day

Days per year at Lewistown AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 58 in 1919.

Days at or above 30 C (86 F) per year at Lewistown AP
Year	Days	Decade average
1896	25	25
1900	35	27.1
1901	27	27.1
1903	11	27.1
1904	26	27.1
1905	31	27.1
1906	32	27.1
1907	6	27.1
1908	48	27.1
1909	28	27.1
1910	34	26
1911	13	26
1913	17	26
1914	28	26
1915	15	26
1916	22	26
1918	21	26
1919	58	26
1920	30	33.4
1921	23	33.4
1922	45	33.4
1925	34	33.4
1926	34	33.4
1927	22	33.4
1928	29	33.4
1929	50	33.4
1930	47	39.7
1931	53	39.7
1932	29	39.7
1933	40	39.7
1934	33	39.7
1935	31	39.7
1936	52	39.7
1937	42	39.7
1938	27	39.7
1939	43	39.7
1940	36	24.5
1941	18	24.5
1942	19	24.5
1943	26	24.5
1944	13	24.5
1945	26	24.5
1946	24	24.5
1947	37	24.5
1948	22	24.5
1949	24	24.5
1950	9	22
1951	19	22
1952	18	22
1953	24	22
1954	20	22
1955	31	22
1956	23	22
1957	28	22
1958	26	22
1959	22	22
1960	33	27.4
1961	42	27.4
1962	10	27.4
1963	32	27.4
1964	24	27.4
1965	10	27.4
1966	37	27.4
1967	38	27.4
1968	15	27.4
1969	33	27.4
1970	35	19.9
1971	40	19.9
1972	12	19.9
1973	28	19.9
1974	16	19.9
1975	10	19.9
1976	18	19.9
1977	8	19.9
1978	11	19.9
1979	21	19.9
1980	15	26.4
1981	22	26.4
1982	21	26.4
1983	31	26.4
1984	34	26.4
1985	27	26.4
1986	17	26.4
1987	19	26.4
1988	50	26.4
1989	28	26.4
1990	32	21.7
1991	42	21.7
1992	17	21.7
1993	4	21.7
1994	28	21.7
1995	13	21.7
1996	19	21.7
1997	12	21.7
1998	34	21.7
1999	16	21.7
2000	27	30
2001	37	30
2002	22	30
2003	46	30
2004	17	30
2005	28	30
2006	40	30
2007	35	30
2008	22	30
2009	26	30
2010	14	29
2011	34	29
2012	34	29
2013	31	29
2014	29	29
2015	38	29
2016	27	29
2017	43	29
2018	20	29
2019	20	29
2020	28	32.9
2021	43	32.9
2022	46	32.9
2023	23	32.9
2024	36	32.9
2025	20	32.9
2026	34	32.9

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

First to last qualifying date each year at Lewistown AP
Year	First date	Last date
1896	1896-06-15	1896-08-31
1900	1900-05-10	1900-08-21
1901	1901-05-16	1901-09-01
1903	1903-05-13	1903-08-29
1904	1904-06-15	1904-09-08
1905	1905-07-09	1905-10-05
1906	1906-04-22	1906-09-30
1907	1907-07-23	1907-10-11
1908	1908-05-07	1908-09-22
1909	1909-06-02	1909-09-28
1910	1910-04-19	1910-09-28
1911	1911-06-18	1911-08-31
1913	1913-07-07	1913-09-15
1914	1914-06-02	1914-09-04
1915	1915-06-25	1915-08-20
1916	1916-06-18	1916-09-03
1918	1918-06-09	1918-09-21
1919	1919-05-21	1919-09-11
1920	1920-07-02	1920-10-05
1921	1921-06-13	1921-08-31
1922	1922-05-25	1922-10-03
1925	1925-05-20	1925-09-03
1926	1926-06-04	1926-08-30
1927	1927-06-22	1927-09-06
1928	1928-05-21	1928-09-18
1929	1929-05-23	1929-09-19
1930	1930-06-07	1930-09-03
1931	1931-05-13	1931-09-07
1932	1932-06-14	1932-09-06
1933	1933-05-30	1933-08-18
1934	1934-05-16	1934-10-12
1935	1935-06-22	1935-09-22
1936	1936-05-14	1936-09-21
1937	1937-05-18	1937-09-20
1938	1938-05-27	1938-09-28
1939	1939-04-28	1939-09-21
1940	1940-06-13	1940-09-12
1941	1941-06-22	1941-08-10
1942	1942-07-02	1942-09-08
1943	1943-07-06	1943-10-07
1944	1944-07-01	1944-09-13
1945	1945-06-21	1945-09-04
1946	1946-07-07	1946-09-15
1947	1947-07-02	1947-09-12
1948	1948-05-17	1948-09-14
1949	1949-06-10	1949-08-22
1950	1950-07-09	1950-09-06
1951	1951-07-13	1951-08-05
1952	1952-06-29	1952-09-03
1953	1953-06-11	1953-09-12
1954	1954-05-19	1954-09-11
1955	1955-07-14	1955-09-14
1956	1956-06-01	1956-09-19
1957	1957-07-05	1957-10-01
1958	1958-05-28	1958-09-11
1959	1959-06-13	1959-09-13
1960	1960-05-12	1960-09-04
1961	1961-05-29	1961-08-29
1962	1962-06-25	1962-08-26
1963	1963-07-02	1963-10-02
1964	1964-05-20	1964-08-18
1965	1965-07-26	1965-08-12
1966	1966-05-27	1966-09-23
1967	1967-07-12	1967-09-29
1968	1968-07-06	1968-09-11
1969	1969-06-04	1969-09-11
1970	1970-06-22	1970-08-31
1971	1971-06-22	1971-09-11
1972	1972-05-16	1972-08-29
1973	1973-06-13	1973-09-06
1974	1974-06-19	1974-08-05
1975	1975-07-05	1975-08-28
1976	1976-06-30	1976-09-17
1977	1977-06-01	1977-08-24
1978	1978-07-15	1978-09-04
1979	1979-06-12	1979-09-16
1980	1980-05-21	1980-09-06
1981	1981-06-26	1981-09-19
1982	1982-07-19	1982-09-09
1983	1983-06-23	1983-09-01
1984	1984-06-28	1984-09-18
1985	1985-05-02	1985-08-30
1986	1986-06-17	1986-08-29
1987	1987-06-05	1987-09-23
1988	1988-05-16	1988-09-06
1989	1989-06-19	1989-09-29
1990	1990-06-23	1990-09-25
1991	1991-06-11	1991-09-07
1992	1992-05-19	1992-10-01
1993	1993-05-11	1993-08-09
1994	1994-06-29	1994-09-09
1995	1995-07-08	1995-09-03
1996	1996-06-09	1996-08-27
1997	1997-07-22	1997-09-03
1998	1998-07-10	1998-09-17
1999	1999-07-07	1999-08-30
2000	2000-06-04	2000-09-15
2001	2001-05-12	2001-09-27
2002	2002-06-26	2002-09-16
2003	2003-05-25	2003-09-07
2004	2004-07-14	2004-09-11
2005	2005-06-21	2005-09-09
2006	2006-06-27	2006-09-05
2007	2007-06-28	2007-09-04
2008	2008-06-29	2008-08-30
2009	2009-05-19	2009-09-24
2010	2010-06-29	2010-10-03
2011	2011-06-28	2011-10-01
2012	2012-06-25	2012-09-14
2013	2013-06-30	2013-09-16
2014	2014-07-03	2014-09-25
2015	2015-06-08	2015-10-10
2016	2016-06-07	2016-09-01
2017	2017-06-04	2017-09-11
2018	2018-07-06	2018-09-07
2019	2019-07-13	2019-09-16
2020	2020-06-12	2020-09-14
2021	2021-06-03	2021-09-18
2022	2022-06-17	2022-09-28
2023	2023-07-10	2023-09-03
2024	2024-06-23	2024-09-29
2025	2025-05-31	2025-09-24
2026	2026-05-13	2026-09-10

Every Fixed Threshold

Fixed thresholds at Lewistown AP
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	123	58	1919	34
35 C (95 F): Days	90	14	2003	4
40 C (104 F): Days	2	2	1900	1
90 F (32.2 C): Days	123	35	1936	13
100 F (37.8 C): Days	20	2	1900	2
0 C (32 F): Ice days (max	123	92	1978	16
0 C (32 F): Frost days (min	121	231	1929	108
-10 C (14 F): Days with min	121	106	1978	21
-20 C (-4 F): Days with min	121	45	1949	8
-30 C (-22 F): Days with min	91	15	1916	3
-40 C (-40 F): Days with min	7	2	1929	2
20 C (68 F): Tropical nights (min	6	1	1909	1
10 mm (0.39 in): Days with 10 mm or more rain	125	23	1903	9
25 mm (0.98 in): Days with 25 mm or more rain	99	8	1981	2
50 mm (1.97 in): Days with 50 mm or more rain	18	3	1953	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	2024	1
10 cm (3.9 in): Days with 10 cm or more snowfall	46	19	1957	2
25 cm (9.8 in): Days with 25 cm or more snowfall	17	5	1955	1
50 cm (19.7 in): Days with 50 cm or more snowfall	1	1	1982	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1896.

Download the Data

Data for Lewistown AP 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Lewistown AP Threshold Days by Year (USW00024036)

Key Facts for Lewistown AP Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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