Sewanee Threshold Days by Year (USC00408184)

15 fixed thresholds counted per year at Sewanee (USC00408184): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Sewanee Thresholds

Sewanee: days with 10 mm (0.39 in) or more of precipitation in 72 years, most in 2017 with 78.
Sewanee: days with 25 mm (0.98 in) or more of precipitation in 72 years, most in 2017 with 34.
Sewanee: days with 50 mm (1.97 in) or more of precipitation in 72 years, most in 2013 with 11.
Sewanee: nights with a minimum temperature at or below 0 C (32 F) in 58 years, most in 1914 with 86.
15 fixed thresholds have at least one qualifying day at Sewanee.

Days at or above 30 C (86 F)

57 years with a qualifying day

Days per year at Sewanee with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 96 in 1941.

Days at or above 30 C (86 F) per year at Sewanee
Year	Days	Decade average
1896	20	31.3
1897	15	31.3
1898	32	31.3
1899	58	31.3
1900	46	26
1903	31	26
1905	19	26
1906	8	26
1907	26	26
1910	26	44.6
1911	58	44.6
1914	71	44.6
1915	25	44.6
1916	19	44.6
1917	31	44.6
1918	66	44.6
1919	61	44.6
1920	25	33.4
1922	52	33.4
1924	57	33.4
1928	6	33.4
1929	27	33.4
1930	67	61
1931	72	61
1935	45	61
1936	81	61
1937	61	61
1939	40	61
1940	59	73.7
1941	96	73.7
1942	66	73.7
2001	3	28.2
2002	35	28.2
2003	7	28.2
2004	11	28.2
2005	25	28.2
2006	60	28.2
2007	59	28.2
2008	29	28.2
2009	25	28.2
2010	49	43.6
2011	65	43.6
2012	47	43.6
2013	13	43.6
2014	36	43.6
2015	39	43.6
2016	73	43.6
2017	18	43.6
2018	34	43.6
2019	62	43.6
2020	23	43
2021	24	43
2022	51	43
2023	37	43
2024	61	43
2025	44	43
2026	61	43

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

First to last qualifying date each year at Sewanee
Year	First date	Last date
1896	1896-07-27	1896-09-18
1897	1897-06-13	1897-09-11
1898	1898-05-18	1898-09-27
1899	1899-05-03	1899-09-09
1900	1900-05-14	1900-09-28
1903	1903-05-22	1903-09-13
1905	1905-05-29	1905-09-23
1906	1906-05-19	1906-08-22
1907	1907-07-05	1907-09-19
1910	1910-06-13	1910-10-02
1911	1911-05-17	1911-10-05
1914	1914-05-10	1914-09-02
1915	1915-05-16	1915-09-19
1916	1916-05-26	1916-10-07
1917	1917-06-13	1917-09-06
1918	1918-05-22	1918-10-05
1919	1919-06-07	1919-10-04
1920	1920-06-10	1920-09-20
1922	1922-06-13	1922-09-17
1924	1924-06-08	1924-09-08
1928	1928-05-10	1928-07-05
1929	1929-03-24	1929-09-09
1930	1930-05-05	1930-09-15
1931	1931-05-28	1931-09-26
1935	1935-06-13	1935-09-24
1936	1936-05-10	1936-09-29
1937	1937-05-22	1937-09-23
1939	1939-06-08	1939-10-09
1940	1940-05-08	1940-09-23
1941	1941-05-20	1941-10-09
1942	1942-04-30	1942-09-16
2001	2001-07-10	2001-07-31
2002	2002-06-04	2002-09-12
2003	2003-08-16	2003-08-28
2004	2004-06-12	2004-08-20
2005	2005-06-24	2005-09-22
2006	2006-05-29	2006-08-30
2007	2007-06-08	2007-09-11
2008	2008-06-05	2008-08-22
2009	2009-06-02	2009-08-27
2010	2010-06-12	2010-09-23
2011	2011-05-12	2011-09-04
2012	2012-05-03	2012-09-08
2013	2013-06-13	2013-09-12
2014	2014-06-17	2014-08-30
2015	2015-06-07	2015-09-04
2016	2016-05-31	2016-10-19
2017	2017-07-10	2017-09-22
2018	2018-05-14	2018-10-05
2019	2019-05-24	2019-10-06
2020	2020-06-07	2020-09-12
2021	2021-06-13	2021-08-30
2022	2022-06-01	2022-09-22
2023	2023-06-04	2023-10-02
2024	2024-06-14	2024-10-06
2025	2025-06-13	2025-09-19
2026	2026-06-12	2026-10-15

Every Fixed Threshold

Fixed thresholds at Sewanee
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	57	96	1941	61
35 C (95 F): Days	21	20	1930	2
90 F (32.2 C): Days	49	51	1930	27
100 F (37.8 C): Days	3	5	1930	2
0 C (32 F): Ice days (max	57	31	2010	6
0 C (32 F): Frost days (min	58	86	1914	38
-10 C (14 F): Days with min	55	19	1899	8
-20 C (-4 F): Days with min	10	3	1940	1
20 C (68 F): Tropical nights (min	58	68	1936	52
25 C (77 F): Days with min	9	5	1930	1
10 mm (0.39 in): Days with 10 mm or more rain	72	78	2017	47
25 mm (0.98 in): Days with 25 mm or more rain	72	34	2017	13
50 mm (1.97 in): Days with 50 mm or more rain	72	11	2013	1
100 mm (3.94 in): Days with 100 mm or more rain	18	1	1906	1
10 cm (3.9 in): Days with 10 cm or more snowfall	4	1	1935	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 Sewanee 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).

Sewanee Threshold Days by Year (USC00408184)

Key Facts for Sewanee Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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