Ames 3 SW Threshold Days by Year (USC00130205)

18 fixed thresholds counted per year at Ames 3 SW (USC00130205): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ames 3 SW Thresholds

Ames 3 SW: days with 10 mm (0.39 in) or more of precipitation in 69 years, most in 1902 with 38.
Ames 3 SW: days with 25 mm (0.98 in) or more of precipitation in 69 years, most in 1902 with 14.
Ames 3 SW: nights with a minimum temperature at or below 0 C (32 F) in 67 years, most in 1893 with 173.
Ames 3 SW: nights with a minimum temperature at or below -10 C (14 F) in 67 years, most in 1893 with 97.
18 fixed thresholds have at least one qualifying day at Ames 3 SW.

Days at or above 30 C (86 F)

63 years with a qualifying day

Days per year at Ames 3 SW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 85 in 1911.

Days at or above 30 C (86 F) per year at Ames 3 SW
Year	Days	Decade average
1893	52	54.5
1895	57	54.5
1901	81	40.7
1902	27	40.7
1903	22	40.7
1904	19	40.7
1905	36	40.7
1906	44	40.7
1907	29	40.7
1908	52	40.7
1909	56	40.7
1910	57	53.5
1911	85	53.5
1912	49	53.5
1913	78	53.5
1915	12	53.5
1916	56	53.5
1917	29	53.5
1919	62	53.5
1920	39	45.3
1921	57	45.3
1922	43	45.3
1923	46	45.3
1924	28	45.3
1925	57	45.3
1926	43	45.3
1927	55	45.3
1928	44	45.3
1929	41	45.3
1930	70	64
1931	72	64
1932	45	64
1933	69	64
1934	78	64
1935	44	64
1936	80	64
1937	64	64
1938	61	64
1939	57	64
1940	40	42.7
1941	50	42.7
1942	34	42.7
1943	43	42.7
1944	40	42.7
1945	35	42.7
1946	31	42.7
1947	58	42.7
1948	47	42.7
1949	49	42.7
1950	25	43.4
1951	15	43.4
1952	49	43.4
1953	55	43.4
1954	57	43.4
1955	61	43.4
1956	68	43.4
1957	37	43.4
1958	22	43.4
1959	45	43.4
1960	33	35.8
1961	35	35.8
1962	34	35.8
1963	41	35.8

For each year, a bar from the first to the last day at Ames 3 SW meeting 30 C (86 F).

First to last qualifying date each year at Ames 3 SW
Year	First date	Last date
1893	1893-06-12	1893-10-08
1895	1895-03-29	1895-09-21
1901	1901-04-29	1901-09-25
1902	1902-04-21	1902-08-02
1903	1903-06-29	1903-08-24
1904	1904-06-18	1904-09-28
1905	1905-06-04	1905-09-27
1906	1906-04-24	1906-10-13
1907	1907-03-25	1907-09-19
1908	1908-06-20	1908-10-16
1909	1909-05-05	1909-10-07
1910	1910-04-09	1910-10-02
1911	1911-05-09	1911-09-18
1912	1912-05-23	1912-10-05
1913	1913-05-28	1913-10-14
1915	1915-05-12	1915-07-31
1916	1916-05-07	1916-10-07
1917	1917-05-17	1917-09-15
1919	1919-06-13	1919-09-11
1920	1920-06-08	1920-10-10
1921	1921-05-20	1921-08-31
1922	1922-06-08	1922-10-05
1923	1923-05-31	1923-09-05
1924	1924-04-24	1924-08-31
1925	1925-04-22	1925-09-20
1926	1926-04-29	1926-09-21
1927	1927-04-26	1927-10-25
1928	1928-05-09	1928-10-11
1929	1929-04-04	1929-09-27
1930	1930-04-10	1930-10-10
1931	1931-04-08	1931-09-20
1932	1932-05-13	1932-10-02
1933	1933-06-01	1933-09-25
1934	1934-05-06	1934-08-27
1935	1935-06-12	1935-09-24
1936	1936-04-30	1936-09-22
1937	1937-05-29	1937-10-29
1938	1938-06-14	1938-10-15
1939	1939-04-24	1939-10-07
1940	1940-05-12	1940-09-21
1941	1941-05-14	1941-09-20
1942	1942-05-28	1942-09-16
1943	1943-05-28	1943-08-31
1944	1944-05-14	1944-09-17
1945	1945-05-20	1945-09-23
1946	1946-06-06	1946-09-06
1947	1947-06-09	1947-10-21
1948	1948-04-18	1948-09-19
1949	1949-04-25	1949-08-26
1950	1950-05-23	1950-10-30
1951	1951-06-27	1951-08-30
1952	1952-04-29	1952-09-30
1953	1953-05-25	1953-10-15
1954	1954-04-14	1954-10-03
1955	1955-05-02	1955-09-18
1956	1956-05-12	1956-10-12
1957	1957-06-05	1957-09-01
1958	1958-05-11	1958-09-24
1959	1959-05-01	1959-09-08
1960	1960-04-22	1960-09-07
1961	1961-05-12	1961-09-10
1962	1962-05-05	1962-10-10
1963	1963-05-08	1963-10-06

Every Fixed Threshold

Fixed thresholds at Ames 3 SW
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	63	85	1911	41
35 C (95 F): Days	50	38	1936	3
40 C (104 F): Days	9	10	1936	1
90 F (32.2 C): Days	63	61	1911	17
100 F (37.8 C): Days	23	21	1934	1
0 C (32 F): Ice days (max	63	83	1960	64
0 C (32 F): Frost days (min	67	173	1893	128
-10 C (14 F): Days with min	67	97	1893	59
-20 C (-4 F): Days with min	66	36	1893	32
-30 C (-22 F): Days with min	24	6	1895	1
20 C (68 F): Tropical nights (min	67	34	1936	12
25 C (77 F): Days with min	17	3	1930	1
10 mm (0.39 in): Days with 10 mm or more rain	69	38	1902	16
25 mm (0.98 in): Days with 25 mm or more rain	69	14	1902	10
50 mm (1.97 in): Days with 50 mm or more rain	56	5	1944	3
100 mm (3.94 in): Days with 100 mm or more rain	9	1	1907	1
10 cm (3.9 in): Days with 10 cm or more snowfall	40	5	1902	1
25 cm (9.8 in): Days with 25 cm or more snowfall	5	1	1909	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1893.

Download the Data

Data for Ames 3 SW 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).

Ames 3 SW Threshold Days by Year (USC00130205)

Key Facts for Ames 3 SW Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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