Yonna Threshold Days by Year

15 fixed thresholds counted per year at Yonna (USC00359604): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Yonna Thresholds

Yonna: days with a maximum temperature at or above 30 C (86 F) in 33 years, most in 1929 with 68.
Yonna: days with a maximum temperature at or above 90 F (32.2 C) in 33 years, most in 1926 with 43.
Yonna: days with a maximum temperature at or below 0 C (32 F) in 33 years, most in 1913 with 46.
Yonna: nights with a minimum temperature at or below 0 C (32 F) in 31 years, most in 1916 with 249.
15 fixed thresholds have at least one qualifying day at Yonna.

Days at or above 30 C (86 F)

33 years with a qualifying day

Days per year at Yonna with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 68 in 1929.

Days at or above 30 C (86 F) per year at Yonna
Year	Days	Decade average
1906	41	32.3
1907	15	32.3
1908	52	32.3
1909	21	32.3
1910	42	38.3
1911	24	38.3
1912	18	38.3
1913	32	38.3
1914	47	38.3
1916	31	38.3
1917	58	38.3
1919	54	38.3
1920	38	49.9
1921	40	49.9
1922	40	49.9
1925	57	49.9
1926	65	49.9
1927	44	49.9
1928	47	49.9
1929	68	49.9
1930	48	42.7
1931	67	42.7
1932	56	42.7
1933	60	42.7
1934	52	42.7
1935	36	42.7
1937	12	42.7
1938	17	42.7
1939	36	42.7
1940	64	52.8
1941	36	52.8
1942	59	52.8
1943	52	52.8

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

First to last qualifying date each year at Yonna
Year	First date	Last date
1906	1906-05-08	1906-08-29
1907	1907-06-26	1907-09-10
1908	1908-06-29	1908-10-08
1909	1909-07-02	1909-10-10
1910	1910-05-29	1910-08-26
1911	1911-06-11	1911-08-30
1912	1912-06-04	1912-08-24
1913	1913-07-05	1913-09-20
1914	1914-05-31	1914-09-22
1916	1916-06-14	1916-09-22
1917	1917-06-08	1917-10-09
1919	1919-05-20	1919-09-25
1920	1920-06-20	1920-09-03
1921	1921-06-22	1921-10-04
1922	1922-06-19	1922-09-19
1925	1925-06-17	1925-08-30
1926	1926-06-02	1926-08-24
1927	1927-05-14	1927-09-20
1928	1928-05-19	1928-09-23
1929	1929-05-20	1929-09-19
1930	1930-06-09	1930-09-20
1931	1931-05-11	1931-09-04
1932	1932-06-20	1932-10-03
1933	1933-05-29	1933-10-08
1934	1934-06-30	1934-10-11
1935	1935-06-05	1935-09-30
1937	1937-06-27	1937-08-17
1938	1938-06-06	1938-09-15
1939	1939-07-09	1939-09-21
1940	1940-06-10	1940-09-01
1941	1941-05-23	1941-08-21
1942	1942-06-29	1942-10-05
1943	1943-06-28	1943-09-30

Every Fixed Threshold

Fixed thresholds at Yonna
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	33	68	1929	52
35 C (95 F): Days	30	22	1939	5
90 F (32.2 C): Days	33	43	1926	27
100 F (37.8 C): Days	12	5	1931	1
0 C (32 F): Ice days (max	33	46	1913	8
0 C (32 F): Frost days (min	31	249	1916	185
-10 C (14 F): Days with min	31	78	1922	25
-20 C (-4 F): Days with min	21	26	1917	2
-30 C (-22 F): Days with min	4	11	1917	1
20 C (68 F): Tropical nights (min	2	1	1925	1
10 mm (0.39 in): Days with 10 mm or more rain	30	14	1912	10
25 mm (0.98 in): Days with 25 mm or more rain	11	3	1937	1
50 mm (1.97 in): Days with 50 mm or more rain	1	1	1939	1
10 cm (3.9 in): Days with 10 cm or more snowfall	14	8	1937	1
25 cm (9.8 in): Days with 25 cm or more snowfall	4	1	1932	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 Yonna 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Yonna Threshold Days by Year

Key Facts for Yonna Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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