Shelby 2 NW Threshold Days by Year

17 fixed thresholds counted per year at Shelby 2 NW (USC00317845): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Shelby 2 NW Thresholds

Shelby 2 NW: days with 10 mm (0.39 in) or more of precipitation in 91 years, most in 1929 with 57.
Shelby 2 NW: days with 25 mm (0.98 in) or more of precipitation in 91 years, most in 1995 with 26.
Shelby 2 NW: days with 50 mm (1.97 in) or more of precipitation in 82 years, most in 1964 with 9.
Shelby 2 NW: nights with a minimum temperature at or below 0 C (32 F) in 80 years, most in 1960 with 122.
17 fixed thresholds have at least one qualifying day at Shelby 2 NW.

Days at or above 30 C (86 F)

76 years with a qualifying day

Days per year at Shelby 2 NW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 134 in 1939.

Days at or above 30 C (86 F) per year at Shelby 2 NW
Year	Days	Decade average
1937	115	119.3
1938	109	119.3
1939	134	119.3
1940	111	104.9
1941	108	104.9
1942	122	104.9
1943	112	104.9
1944	115	104.9
1945	110	104.9
1946	81	104.9
1947	95	104.9
1948	106	104.9
1949	89	104.9
1950	91	98.7
1951	97	98.7
1952	104	98.7
1953	100	98.7
1954	126	98.7
1955	102	98.7
1956	102	98.7
1957	106	98.7
1958	94	98.7
1959	65	98.7
1960	77	65.3
1961	57	65.3
1962	74	65.3
1963	59	65.3
1964	58	65.3
1965	57	65.3
1966	60	65.3
1969	80	65.3
1970	95	70.4
1971	53	70.4
1972	70	70.4
1974	57	70.4
1975	65	70.4
1976	54	70.4
1977	91	70.4
1978	100	70.4
1979	49	70.4
1980	98	84.8
1981	83	84.8
1982	71	84.8
1983	87	84.8
1994	42	56.4
1995	53	56.4
1996	61	56.4
1997	61	56.4
1999	65	56.4
2000	70	78.6
2001	59	78.6
2002	89	78.6
2003	45	78.6
2004	65	78.6
2005	91	78.6
2006	87	78.6
2007	112	78.6
2008	88	78.6
2009	80	78.6
2010	110	95.7
2011	92	95.7
2012	72	95.7
2013	62	95.7
2014	80	95.7
2015	100	95.7
2016	110	95.7
2017	99	95.7
2018	115	95.7
2019	117	95.7
2020	86	87.1
2021	91	87.1
2022	93	87.1
2023	76	87.1
2024	76	87.1
2025	76	87.1
2026	112	87.1

For each year, a bar from the first to the last day at Shelby 2 NW meeting 30 C (86 F).

First to last qualifying date each year at Shelby 2 NW
Year	First date	Last date
1937	1937-04-18	1937-10-30
1938	1938-03-22	1938-10-30
1939	1939-03-24	1939-10-27
1940	1940-04-01	1940-10-28
1941	1941-04-20	1941-10-23
1942	1942-04-05	1942-09-24
1943	1943-04-27	1943-10-21
1944	1944-04-10	1944-10-07
1945	1945-03-17	1945-09-30
1946	1946-04-02	1946-09-25
1947	1947-05-13	1947-09-21
1948	1948-03-20	1948-09-23
1949	1949-04-24	1949-09-20
1950	1950-04-24	1950-09-21
1951	1951-04-27	1951-10-08
1952	1952-04-19	1952-10-03
1953	1953-04-24	1953-09-18
1954	1954-04-09	1954-10-28
1955	1955-04-19	1955-10-01
1956	1956-04-29	1956-10-03
1957	1957-04-22	1957-09-23
1958	1958-04-25	1958-10-11
1959	1959-05-03	1959-09-05
1960	1960-04-24	1960-09-21
1961	1961-06-02	1961-09-27
1962	1962-05-01	1962-10-09
1963	1963-04-22	1963-09-22
1964	1964-05-10	1964-09-24
1965	1965-04-24	1965-09-22
1966	1966-05-30	1966-09-07
1969	1969-05-06	1969-09-18
1970	1970-04-23	1970-10-03
1971	1971-04-18	1971-09-15
1972	1972-04-15	1972-09-27
1974	1974-04-28	1974-11-02
1975	1975-04-28	1975-09-09
1976	1976-04-18	1976-09-09
1977	1977-04-11	1977-09-22
1978	1978-04-02	1978-09-28
1979	1979-05-11	1979-09-07
1980	1980-04-23	1980-09-24
1981	1981-04-27	1981-10-06
1982	1982-05-12	1982-10-02
1983	1983-06-04	1983-09-20
1994	1994-05-23	1994-09-10
1995	1995-04-10	1995-09-09
1996	1996-05-17	1996-09-09
1997	1997-06-19	1997-10-07
1999	1999-06-06	1999-09-13
2000	2000-05-12	2000-09-24
2001	2001-04-09	2001-09-23
2002	2002-04-16	2002-09-16
2003	2003-06-24	2003-09-21
2004	2004-04-24	2004-09-01
2005	2005-05-12	2005-09-27
2006	2006-04-14	2006-09-10
2007	2007-03-25	2007-10-09
2008	2008-05-28	2008-09-14
2009	2009-04-25	2009-09-26
2010	2010-04-03	2010-10-13
2011	2011-05-11	2011-09-15
2012	2012-05-03	2012-09-16
2013	2013-05-16	2013-10-06
2014	2014-05-05	2014-10-03
2015	2015-04-10	2015-10-01
2016	2016-04-19	2016-10-21
2017	2017-03-22	2017-10-13
2018	2018-05-05	2018-10-09
2019	2019-04-25	2019-10-05
2020	2020-04-09	2020-10-09
2021	2021-05-23	2021-10-15
2022	2022-05-03	2022-09-23
2023	2023-04-07	2023-09-30
2024	2024-04-16	2024-09-23
2025	2025-04-05	2025-09-25
2026	2026-03-12	2026-10-09

Every Fixed Threshold

Fixed thresholds at Shelby 2 NW
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	76	134	1939	112
35 C (95 F): Days	64	59	1954	25
40 C (104 F): Days	9	5	1952	1
90 F (32.2 C): Days	76	102	1939	69
100 F (37.8 C): Days	29	14	1952	4
0 C (32 F): Ice days (max	46	8	1960	2
0 C (32 F): Frost days (min	80	122	1960	54
-10 C (14 F): Days with min	66	28	1963	6
-20 C (-4 F): Days with min	3	2	1958	1
20 C (68 F): Tropical nights (min	80	74	1941	61
25 C (77 F): Days with min	5	1	1942	1
10 mm (0.39 in): Days with 10 mm or more rain	91	57	1929	27
25 mm (0.98 in): Days with 25 mm or more rain	91	26	1995	8
50 mm (1.97 in): Days with 50 mm or more rain	82	9	1964	2
100 mm (3.94 in): Days with 100 mm or more rain	21	2	2021	1
10 cm (3.9 in): Days with 10 cm or more snowfall	28	3	1960	1
25 cm (9.8 in): Days with 25 cm or more snowfall	8	1	1930	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1937.

Download the Data

Data for Shelby 2 NW 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 2026-10-15 (15 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Shelby 2 NW Threshold Days by Year

Key Facts for Shelby 2 NW Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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