Alta Lake 2 Threshold Days by Year

7 fixed thresholds counted per year at Alta Lake 2 (CA001040420): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Alta Lake 2 Thresholds

Alta Lake 2: days with 10 mm (0.39 in) or more of precipitation in 36 years, most in 1933 with 71.
Alta Lake 2: days with 25 mm (0.98 in) or more of precipitation in 36 years, most in 1968 with 20.
Alta Lake 2: days with 10 cm (3.9 in) or more of snowfall in 36 years, most in 1933 with 33.
Alta Lake 2: days with 25 cm (9.8 in) or more of snowfall in 35 years, most in 1933 with 11.
7 fixed thresholds have at least one qualifying day at Alta Lake 2.

Days with 10 mm (0.39 in) or more of precipitation

36 years with a qualifying day

Days per year at Alta Lake 2 with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 71 in 1933.

Days with 10 mm (0.39 in) or more of precipitation per year at Alta Lake 2
Year	Days	Decade average
1932	55	55.3
1933	71	55.3
1934	67	55.3
1935	44	55.3
1936	45	55.3
1937	47	55.3
1938	53	55.3
1939	60	55.3
1940	45	43.6
1941	43	43.6
1943	31	43.6
1944	35	43.6
1945	40	43.6
1946	44	43.6
1947	46	43.6
1948	60	43.6
1949	48	43.6
1950	64	49.2
1951	46	49.2
1952	35	49.2
1953	57	49.2
1954	60	49.2
1955	43	49.2
1956	59	49.2
1957	41	49.2
1958	42	49.2
1959	45	49.2
1960	43	51.4
1961	63	51.4
1962	46	51.4
1963	44	51.4
1964	43	51.4
1965	44	51.4
1966	54	51.4
1967	64	51.4
1968	62	51.4

For each year, a bar from the first to the last day at Alta Lake 2 meeting 10 mm (0.39 in).

First to last qualifying date each year at Alta Lake 2
Year	First date	Last date
1932	1932-01-08	1932-12-31
1933	1933-01-01	1933-12-28
1934	1934-01-01	1934-12-31
1935	1935-01-01	1935-12-29
1936	1936-01-03	1936-12-23
1937	1937-01-08	1937-12-28
1938	1938-01-11	1938-12-31
1939	1939-01-01	1939-12-31
1940	1940-01-01	1940-12-24
1941	1941-01-09	1941-12-22
1943	1943-01-14	1943-12-31
1944	1944-01-01	1944-12-30
1945	1945-01-04	1945-12-28
1946	1946-01-03	1946-12-14
1947	1947-01-09	1947-12-31
1948	1948-01-01	1948-12-30
1949	1949-01-05	1949-12-30
1950	1950-01-04	1950-12-29
1951	1951-01-01	1951-12-28
1952	1952-01-08	1952-12-29
1953	1953-01-01	1953-12-31
1954	1954-01-01	1954-12-31
1955	1955-01-12	1955-12-25
1956	1956-01-01	1956-12-31
1957	1957-01-01	1957-12-27
1958	1958-01-03	1958-12-31
1959	1959-01-05	1959-12-23
1960	1960-01-10	1960-12-23
1961	1961-01-03	1961-12-28
1962	1962-01-24	1962-12-31
1963	1963-02-02	1963-12-31
1964	1964-01-02	1964-12-31
1965	1965-01-01	1965-12-30
1966	1966-01-01	1966-12-31
1967	1967-01-02	1967-12-24
1968	1968-01-06	1968-12-31

Every Fixed Threshold

Fixed thresholds at Alta Lake 2
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
10 mm (0.39 in): Days with 10 mm or more rain	36	71	1933	62
25 mm (0.98 in): Days with 25 mm or more rain	36	20	1968	20
50 mm (1.97 in): Days with 50 mm or more rain	23	4	1950	1
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1935	1
10 cm (3.9 in): Days with 10 cm or more snowfall	36	33	1933	22
25 cm (9.8 in): Days with 25 cm or more snowfall	35	11	1933	6
50 cm (19.7 in): Days with 50 cm or more snowfall	12	2	1933	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1932.

Download the Data

Data for Alta Lake 2 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

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

Alta Lake 2 Threshold Days by Year

Key Facts for Alta Lake 2 Thresholds

Days with 10 mm (0.39 in) or more of precipitation

Every Fixed Threshold

Download the Data

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