Thorne Threshold Days by Year (USC00268034)

14 fixed thresholds counted per year at Thorne (USC00268034): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Thorne Thresholds

Thorne: days with a maximum temperature at or above 30 C (86 F) in 27 years, most in 1924 with 106.
Thorne: days with a maximum temperature at or above 35 C (95 F) in 27 years, most in 1937 with 52.
Thorne: days with a maximum temperature at or above 90 F (32.2 C) in 27 years, most in 1940 with 86.
Thorne: days with a maximum temperature at or above 100 F (37.8 C) in 27 years, most in 1936 with 21.
14 fixed thresholds have at least one qualifying day at Thorne.

Days at or above 30 C (86 F)

27 years with a qualifying day

Days per year at Thorne with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 106 in 1924.

Days at or above 30 C (86 F) per year at Thorne
Year	Days	Decade average
1920	81	90.6
1921	86	90.6
1922	104	90.6
1923	80	90.6
1924	106	90.6
1925	69	90.6
1926	101	90.6
1927	91	90.6
1928	97	90.6
1930	84	92.7
1931	89	92.7
1932	89	92.7
1933	94	92.7
1934	98	92.7
1935	99	92.7
1936	100	92.7
1937	102	92.7
1938	84	92.7
1939	88	92.7
1940	103	87.8
1941	71	87.8
1942	79	87.8
1943	96	87.8
1944	78	87.8
1945	81	87.8
1946	96	87.8
1947	98	87.8

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

First to last qualifying date each year at Thorne
Year	First date	Last date
1920	1920-05-17	1920-09-30
1921	1921-05-14	1921-09-28
1922	1922-05-23	1922-09-26
1923	1923-05-08	1923-09-20
1924	1924-05-09	1924-09-29
1925	1925-05-06	1925-09-25
1926	1926-05-03	1926-09-28
1927	1927-04-26	1927-09-22
1928	1928-05-25	1928-09-25
1930	1930-05-27	1930-09-20
1931	1931-05-10	1931-09-28
1932	1932-05-17	1932-10-05
1933	1933-05-29	1933-10-02
1934	1934-04-12	1934-10-10
1935	1935-05-26	1935-09-22
1936	1936-04-15	1936-09-24
1937	1937-05-03	1937-09-27
1938	1938-05-13	1938-09-26
1939	1939-05-28	1939-09-20
1940	1940-05-01	1940-09-26
1941	1941-05-10	1941-09-10
1942	1942-05-20	1942-09-06
1943	1943-04-30	1943-10-05
1944	1944-05-13	1944-09-28
1945	1945-04-20	1945-09-15
1946	1946-04-24	1946-09-26
1947	1947-05-01	1947-10-05

Every Fixed Threshold

Fixed thresholds at Thorne
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	27	106	1924	98
35 C (95 F): Days	27	52	1937	45
40 C (104 F): Days	13	6	1936	1
90 F (32.2 C): Days	27	86	1940	82
100 F (37.8 C): Days	27	21	1936	7
0 C (32 F): Ice days (max	19	25	1937	2
0 C (32 F): Frost days (min	26	144	1947	144
-10 C (14 F): Days with min	24	24	1937	12
-20 C (-4 F): Days with min	3	2	1937	2
20 C (68 F): Tropical nights (min	25	18	1931	5
25 C (77 F): Days with min	4	1	1923	1
10 mm (0.39 in): Days with 10 mm or more rain	25	6	1945	3
25 mm (0.98 in): Days with 25 mm or more rain	5	1	1930	1
10 cm (3.9 in): Days with 10 cm or more snowfall	2	2	1945	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1920.

Download the Data

Data for Thorne 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Thorne Threshold Days by Year (USC00268034)

Key Facts for Thorne Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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