Iola Threshold Days by Year (USC00143989)

19 fixed thresholds counted per year at Iola (USC00143989): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Iola Thresholds

Iola: days with a maximum temperature at or above 30 C (86 F) in 53 years, most in 1956 with 129.
Iola: days with a maximum temperature at or above 90 F (32.2 C) in 53 years, most in 1954 with 105.
Iola: days with a maximum temperature at or below 0 C (32 F) in 53 years, most in 1912 with 36.
Iola: nights with a minimum temperature at or below 0 C (32 F) in 53 years, most in 1912 with 127.
19 fixed thresholds have at least one qualifying day at Iola.

Days at or above 30 C (86 F)

53 years with a qualifying day

Days per year at Iola with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 129 in 1956.

Days at or above 30 C (86 F) per year at Iola
Year	Days	Decade average
1906	66	77.8
1907	77	77.8
1908	76	77.8
1909	92	77.8
1910	79	85
1911	104	85
1912	80	85
1913	97	85
1914	92	85
1915	39	85
1916	88	85
1917	76	85
1918	96	85
1919	99	85
1920	71	80.6
1921	103	80.6
1922	91	80.6
1923	81	80.6
1924	66	80.6
1925	98	80.6
1926	78	80.6
1927	69	80.6
1928	73	80.6
1929	76	80.6
1930	81	100.1
1931	101	100.1
1932	100	100.1
1933	102	100.1
1934	101	100.1
1935	76	100.1
1936	119	100.1
1937	98	100.1
1938	106	100.1
1939	117	100.1
1940	87	86.9
1941	86	86.9
1942	80	86.9
1943	87	86.9
1944	87	86.9
1945	65	86.9
1946	97	86.9
1947	98	86.9
1948	98	86.9
1949	84	86.9
1950	55	100.7
1951	69	100.7
1952	124	100.7
1953	128	100.7
1954	121	100.7
1955	103	100.7
1956	129	100.7
1957	87	100.7
1958	90	100.7

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

First to last qualifying date each year at Iola
Year	First date	Last date
1906	1906-04-23	1906-10-04
1907	1907-03-19	1907-10-02
1908	1908-05-15	1908-09-20
1909	1909-04-29	1909-10-07
1910	1910-03-22	1910-10-02
1911	1911-04-29	1911-10-03
1912	1912-05-09	1912-10-09
1913	1913-04-17	1913-09-08
1914	1914-04-25	1914-09-17
1915	1915-05-12	1915-09-26
1916	1916-03-21	1916-10-08
1917	1917-04-23	1917-10-15
1918	1918-04-02	1918-10-07
1919	1919-04-22	1919-10-03
1920	1920-05-25	1920-10-10
1921	1921-03-18	1921-10-17
1922	1922-05-21	1922-10-27
1923	1923-05-11	1923-09-28
1924	1924-04-15	1924-09-20
1925	1925-05-20	1925-10-03
1926	1926-05-17	1926-09-23
1927	1927-05-17	1927-10-27
1928	1928-05-09	1928-10-14
1929	1929-03-24	1929-10-17
1930	1930-04-09	1930-09-25
1931	1931-05-16	1931-10-10
1932	1932-05-13	1932-10-18
1933	1933-05-08	1933-09-30
1934	1934-04-10	1934-09-19
1935	1935-06-10	1935-09-25
1936	1936-04-12	1936-09-21
1937	1937-05-19	1937-10-30
1938	1938-04-30	1938-10-15
1939	1939-05-16	1939-10-25
1940	1940-03-31	1940-10-23
1941	1941-05-14	1941-09-20
1942	1942-04-04	1942-09-18
1943	1943-04-29	1943-09-22
1944	1944-05-13	1944-10-06
1945	1945-05-25	1945-09-23
1946	1946-03-31	1946-10-07
1947	1947-05-14	1947-10-20
1948	1948-04-16	1948-09-22
1949	1949-04-22	1949-10-07
1950	1950-04-23	1950-10-31
1951	1951-04-27	1951-10-03
1952	1952-04-29	1952-10-26
1953	1953-04-22	1953-10-18
1954	1954-04-06	1954-10-10
1955	1955-04-17	1955-09-21
1956	1956-03-05	1956-10-12
1957	1957-06-05	1957-10-02
1958	1958-04-23	1958-10-19

Every Fixed Threshold

Fixed thresholds at Iola
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	53	129	1956	90
35 C (95 F): Days	51	85	1954	15
40 C (104 F): Days	23	33	1954	12
45 C (113 F): Days	2	5	1954	5
90 F (32.2 C): Days	53	105	1954	54
100 F (37.8 C): Days	43	61	1954	1
110 F (43.3 C): Days	5	7	1954	1
0 C (32 F): Ice days (max	53	36	1912	22
0 C (32 F): Frost days (min	53	127	1912	104
-10 C (14 F): Days with min	53	37	1918	22
-20 C (-4 F): Days with min	26	7	1918	2
20 C (68 F): Tropical nights (min	53	81	1954	51
25 C (77 F): Days with min	37	23	1936	1
10 mm (0.39 in): Days with 10 mm or more rain	53	44	1951	30
25 mm (0.98 in): Days with 25 mm or more rain	53	21	1927	15
50 mm (1.97 in): Days with 50 mm or more rain	50	7	1915	5
100 mm (3.94 in): Days with 100 mm or more rain	8	2	1941	1
10 cm (3.9 in): Days with 10 cm or more snowfall	31	4	1912	3
25 cm (9.8 in): Days with 25 cm or more snowfall	3	1	1911	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1906.

Download the Data

Data for Iola 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).

Iola Threshold Days by Year (USC00143989)

Key Facts for Iola Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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