Otto FAA AP Threshold Days by Year (USW00023056)

14 fixed thresholds counted per year at Otto FAA AP (USW00023056): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Otto FAA AP Thresholds

Otto FAA AP: days with 10 mm (0.39 in) or more of precipitation in 33 years, most in 1919 with 16.
Otto FAA AP: nights with a minimum temperature at or below 0 C (32 F) in 32 years, most in 1933 with 210.
Otto FAA AP: nights with a minimum temperature at or below -10 C (14 F) in 32 years, most in 1912 with 66.
Otto FAA AP: days with a maximum temperature at or above 30 C (86 F) in 31 years, most in 1922 with 87.
14 fixed thresholds have at least one qualifying day at Otto FAA AP.

Days at or above 30 C (86 F)

31 years with a qualifying day

Days per year at Otto FAA AP with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 87 in 1922.

Days at or above 30 C (86 F) per year at Otto FAA AP
Year	Days	Decade average
1910	84	63
1912	33	63
1913	53	63
1917	72	63
1918	72	63
1919	64	63
1920	49	59
1921	33	59
1922	87	59
1923	48	59
1924	80	59
1925	57	59
1932	46	60
1933	54	60
1934	69	60
1935	63	60
1936	71	60
1938	57	60
1939	60	60
1940	58	59.6
1942	52	59.6
1943	78	59.6
1945	72	59.6
1946	59	59.6
1947	64	59.6
1948	62	59.6
1949	32	59.6
1950	40	61.3
1951	59	61.3
1952	65	61.3
1953	81	61.3

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

First to last qualifying date each year at Otto FAA AP
Year	First date	Last date
1910	1910-04-29	1910-10-24
1912	1912-05-25	1912-08-26
1913	1913-05-26	1913-08-27
1917	1917-06-09	1917-10-05
1918	1918-06-01	1918-10-05
1919	1919-06-15	1919-09-12
1920	1920-05-21	1920-08-30
1921	1921-05-29	1921-09-27
1922	1922-05-27	1922-09-19
1923	1923-06-11	1923-09-11
1924	1924-05-31	1924-09-11
1925	1925-05-18	1925-09-26
1932	1932-06-12	1932-09-16
1933	1933-06-02	1933-09-29
1934	1934-05-07	1934-09-05
1935	1935-06-08	1935-09-20
1936	1936-05-13	1936-09-09
1938	1938-05-27	1938-08-29
1939	1939-06-11	1939-09-08
1940	1940-05-31	1940-09-15
1942	1942-05-26	1942-08-21
1943	1943-06-07	1943-09-22
1945	1945-05-26	1945-09-18
1946	1946-06-03	1946-09-06
1947	1947-05-03	1947-09-24
1948	1948-05-15	1948-09-18
1949	1949-06-15	1949-09-02
1950	1950-06-06	1950-09-02
1951	1951-05-25	1951-09-07
1952	1952-06-06	1952-09-07
1953	1953-05-21	1953-09-27

Every Fixed Threshold

Fixed thresholds at Otto FAA AP
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	31	87	1922	81
35 C (95 F): Days	21	13	1918	9
90 F (32.2 C): Days	31	46	1910	39
0 C (32 F): Ice days (max	30	27	1932	11
0 C (32 F): Frost days (min	32	210	1933	194
-10 C (14 F): Days with min	32	66	1912	33
-20 C (-4 F): Days with min	23	15	1932	2
-30 C (-22 F): Days with min	2	1	1913	1
20 C (68 F): Tropical nights (min	1	1	1910	1
10 mm (0.39 in): Days with 10 mm or more rain	33	16	1919	4
25 mm (0.98 in): Days with 25 mm or more rain	21	4	1919	2
50 mm (1.97 in): Days with 50 mm or more rain	4	2	1923	1
10 cm (3.9 in): Days with 10 cm or more snowfall	20	5	1918	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1919	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1910.

Download the Data

Data for Otto FAA AP 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).

Otto FAA AP Threshold Days by Year (USW00023056)

Key Facts for Otto FAA AP Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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