Wenona Threshold Days by Year (USC00319225)

17 fixed thresholds counted per year at Wenona (USC00319225): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Wenona Thresholds

Wenona: days with a maximum temperature at or above 30 C (86 F) in 30 years, most in 1944 with 114.
Wenona: days with a maximum temperature at or above 90 F (32.2 C) in 30 years, most in 1944 with 83.
Wenona: nights with a minimum temperature at or below 0 C (32 F) in 29 years, most in 1915 with 106.
Wenona: nights with a minimum temperature at or above 20 C (68 F) in 29 years, most in 1934 with 68.
17 fixed thresholds have at least one qualifying day at Wenona.

Days at or above 30 C (86 F)

30 years with a qualifying day

Days per year at Wenona with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 114 in 1944.

Days at or above 30 C (86 F) per year at Wenona
Year	Days	Decade average
1915	96	82.4
1916	85	82.4
1917	60	82.4
1918	74	82.4
1919	97	82.4
1920	57	71.1
1921	80	71.1
1922	79	71.1
1923	65	71.1
1924	50	71.1
1925	99	71.1
1926	91	71.1
1927	69	71.1
1928	56	71.1
1929	65	71.1
1930	96	87.2
1931	97	87.2
1932	89	87.2
1933	96	87.2
1934	81	87.2
1935	76	87.2
1936	80	87.2
1937	79	87.2
1938	81	87.2
1939	97	87.2
1940	74	98.8
1941	102	98.8
1942	110	98.8
1943	94	98.8
1944	114	98.8

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

First to last qualifying date each year at Wenona
Year	First date	Last date
1915	1915-04-20	1915-10-15
1916	1916-01-02	1916-10-10
1917	1917-06-02	1917-09-28
1918	1918-04-03	1918-10-06
1919	1919-04-08	1919-10-28
1920	1920-04-21	1920-09-26
1921	1921-03-21	1921-10-03
1922	1922-04-09	1922-10-06
1923	1923-06-02	1923-09-22
1924	1924-05-20	1924-09-13
1925	1925-04-15	1925-10-17
1926	1926-04-22	1926-10-04
1927	1927-04-20	1927-10-03
1928	1928-05-11	1928-10-18
1929	1929-03-24	1929-09-30
1930	1930-04-11	1930-10-17
1931	1931-05-16	1931-10-07
1932	1932-04-25	1932-09-17
1933	1933-05-11	1933-10-01
1934	1934-04-06	1934-09-29
1935	1935-03-21	1935-09-28
1936	1936-05-08	1936-09-28
1937	1937-05-17	1937-10-07
1938	1938-03-30	1938-09-28
1939	1939-03-25	1939-10-26
1940	1940-05-07	1940-09-25
1941	1941-04-14	1941-10-19
1942	1942-03-17	1942-10-16
1943	1943-04-28	1943-09-23
1944	1944-03-27	1944-10-07

Every Fixed Threshold

Fixed thresholds at Wenona
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	30	114	1944	114
35 C (95 F): Days	28	26	1944	26
40 C (104 F): Days	1	1	1942	1
90 F (32.2 C): Days	30	83	1944	83
100 F (37.8 C): Days	8	6	1932	2
0 C (32 F): Ice days (max	16	10	1917	1
0 C (32 F): Frost days (min	29	106	1915	78
-10 C (14 F): Days with min	25	16	1940	2
-20 C (-4 F): Days with min	2	2	1918	1
20 C (68 F): Tropical nights (min	29	68	1934	54
25 C (77 F): Days with min	6	2	1918	1
10 mm (0.39 in): Days with 10 mm or more rain	29	51	1917	36
25 mm (0.98 in): Days with 25 mm or more rain	29	22	1917	16
50 mm (1.97 in): Days with 50 mm or more rain	29	8	1929	5
100 mm (3.94 in): Days with 100 mm or more rain	8	2	1917	1
10 cm (3.9 in): Days with 10 cm or more snowfall	9	2	1927	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1927	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1915.

Download the Data

Data for Wenona 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).

Wenona Threshold Days by Year (USC00319225)

Key Facts for Wenona Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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