Wallace Threshold Days by Year (USC00109493)

15 fixed thresholds counted per year at Wallace (USC00109493): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Wallace Thresholds

Wallace: days with 10 mm (0.39 in) or more of precipitation in 51 years, most in 1950 with 53.
Wallace: days with a maximum temperature at or above 30 C (86 F) in 50 years, most in 1922 with 63.
Wallace: days with a maximum temperature at or above 90 F (32.2 C) in 50 years, most in 1939 with 38.
Wallace: days with a maximum temperature at or below 0 C (32 F) in 50 years, most in 1949 with 54.
15 fixed thresholds have at least one qualifying day at Wallace.

Days at or above 30 C (86 F)

50 years with a qualifying day

Days per year at Wallace with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 63 in 1922.

Days at or above 30 C (86 F) per year at Wallace
Year	Days	Decade average
1908	23	19
1909	15	19
1910	32	31.3
1911	26	31.3
1912	21	31.3
1916	28	31.3
1917	42	31.3
1918	33	31.3
1919	37	31.3
1920	38	42.6
1921	34	42.6
1922	63	42.6
1923	43	42.6
1924	45	42.6
1925	46	42.6
1926	38	42.6
1927	32	42.6
1928	38	42.6
1929	49	42.6
1930	54	46.7
1931	42	46.7
1932	43	46.7
1934	51	46.7
1935	39	46.7
1936	43	46.7
1937	40	46.7
1938	55	46.7
1939	53	46.7
1940	59	33
1941	40	33
1942	40	33
1943	27	33
1944	24	33
1945	34	33
1946	29	33
1947	26	33
1948	18	33
1949	33	33
1950	27	24.4
1951	32	24.4
1952	24	24.4
1953	25	24.4
1954	13	24.4
1955	29	24.4
1956	25	24.4
1957	15	24.4
1958	35	24.4
1959	19	24.4
1960	21	30.5
1961	40	30.5

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

First to last qualifying date each year at Wallace
Year	First date	Last date
1908	1908-06-14	1908-08-19
1909	1909-06-01	1909-09-16
1910	1910-04-24	1910-09-19
1911	1911-05-31	1911-09-12
1912	1912-06-07	1912-08-26
1916	1916-06-15	1916-09-02
1917	1917-06-14	1917-09-21
1918	1918-06-07	1918-09-21
1919	1919-05-21	1919-08-26
1920	1920-06-21	1920-08-23
1921	1921-06-06	1921-08-30
1922	1922-06-01	1922-09-26
1923	1923-06-09	1923-09-13
1924	1924-05-10	1924-09-16
1925	1925-06-19	1925-09-01
1926	1926-06-06	1926-08-26
1927	1927-06-07	1927-08-20
1928	1928-05-20	1928-09-05
1929	1929-05-21	1929-09-17
1930	1930-05-27	1930-09-08
1931	1931-05-30	1931-09-04
1932	1932-06-12	1932-09-28
1934	1934-05-14	1934-09-06
1935	1935-06-07	1935-10-02
1936	1936-05-10	1936-08-30
1937	1937-06-01	1937-09-18
1938	1938-05-26	1938-09-23
1939	1939-04-28	1939-09-20
1940	1940-05-09	1940-09-12
1941	1941-05-11	1941-08-23
1942	1942-05-21	1942-10-08
1943	1943-07-06	1943-10-04
1944	1944-05-27	1944-09-12
1945	1945-06-20	1945-09-01
1946	1946-04-25	1946-09-11
1947	1947-05-07	1947-09-02
1948	1948-05-25	1948-09-13
1949	1949-05-09	1949-09-08
1950	1950-06-30	1950-09-03
1951	1951-05-22	1951-08-22
1952	1952-06-09	1952-09-25
1953	1953-07-07	1953-09-15
1954	1954-05-18	1954-08-13
1955	1955-06-10	1955-09-06
1956	1956-05-19	1956-08-23
1957	1957-05-31	1957-09-26
1958	1958-05-22	1958-09-10
1959	1959-06-02	1959-09-12
1960	1960-07-06	1960-08-11
1961	1961-06-03	1961-08-24

Every Fixed Threshold

Fixed thresholds at Wallace
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	50	63	1922	40
35 C (95 F): Days	45	19	1939	7
40 C (104 F): Days	6	2	1924	1
90 F (32.2 C): Days	50	38	1939	22
100 F (37.8 C): Days	20	7	1939	2
0 C (32 F): Ice days (max	50	54	1949	24
0 C (32 F): Frost days (min	49	188	1948	159
-10 C (14 F): Days with min	49	45	1949	19
-20 C (-4 F): Days with min	35	12	1950	2
20 C (68 F): Tropical nights (min	1	1	1955	1
10 mm (0.39 in): Days with 10 mm or more rain	51	53	1950	41
25 mm (0.98 in): Days with 25 mm or more rain	50	14	1927	7
50 mm (1.97 in): Days with 50 mm or more rain	18	3	1910	1
10 cm (3.9 in): Days with 10 cm or more snowfall	46	15	1917	11
25 cm (9.8 in): Days with 25 cm or more snowfall	17	4	1937	3

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1908.

Download the Data

Data for Wallace 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).

Wallace Threshold Days by Year (USC00109493)

Key Facts for Wallace Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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