Ephrata Threshold Days by Year (USC00452609)

18 fixed thresholds counted per year at Ephrata (USC00452609): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ephrata Thresholds

Ephrata: nights with a minimum temperature at or below 0 C (32 F) in 50 years, most in 1955 with 153.
Ephrata: nights with a minimum temperature at or above 20 C (68 F) in 50 years, most in 1958 with 31.
Ephrata: days with 10 mm (0.39 in) or more of precipitation in 50 years, most in 1948 with 10.
Ephrata: days with a maximum temperature at or above 30 C (86 F) in 49 years, most in 1967 with 92.
18 fixed thresholds have at least one qualifying day at Ephrata.

Days at or above 30 C (86 F)

49 years with a qualifying day

Days per year at Ephrata with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 92 in 1967.

Days at or above 30 C (86 F) per year at Ephrata
Year	Days	Decade average
1904	64	64
1910	69	69
1921	54	68.1
1922	89	68.1
1923	68	68.1
1924	77	68.1
1925	72	68.1
1926	67	68.1
1927	47	68.1
1928	68	68.1
1929	71	68.1
1930	57	66.8
1931	68	66.8
1932	59	66.8
1933	45	66.8
1934	88	66.8
1935	62	66.8
1936	75	66.8
1937	61	66.8
1938	87	66.8
1939	66	66.8
1940	86	61.5
1941	57	61.5
1942	68	61.5
1943	60	61.5
1944	62	61.5
1945	71	61.5
1946	45	61.5
1947	56	61.5
1948	45	61.5
1949	65	61.5
1952	65	60
1953	59	60
1954	44	60
1955	56	60
1956	67	60
1957	56	60
1958	86	60
1959	47	60
1960	61	57.2
1962	51	57.2
1963	67	57.2
1964	39	57.2
1965	49	57.2
1966	53	57.2
1967	92	57.2
1968	48	57.2
1969	55	57.2
1970	60	60

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

First to last qualifying date each year at Ephrata
Year	First date	Last date
1904	1904-05-20	1904-10-01
1910	1910-04-18	1910-10-15
1921	1921-05-24	1921-08-30
1922	1922-05-15	1922-09-25
1923	1923-05-08	1923-10-02
1924	1924-05-09	1924-09-16
1925	1925-05-06	1925-09-24
1926	1926-04-15	1926-09-04
1927	1927-06-05	1927-08-23
1928	1928-05-18	1928-09-23
1929	1929-05-19	1929-09-17
1930	1930-05-27	1930-09-17
1931	1931-04-30	1931-09-04
1932	1932-06-11	1932-10-02
1933	1933-06-02	1933-09-04
1934	1934-04-19	1934-10-11
1935	1935-05-20	1935-10-02
1936	1936-04-16	1936-09-21
1937	1937-05-02	1937-09-19
1938	1938-05-21	1938-09-23
1939	1939-04-28	1939-09-23
1940	1940-05-09	1940-09-26
1941	1941-05-11	1941-09-23
1942	1942-06-13	1942-09-27
1943	1943-05-24	1943-10-01
1944	1944-05-14	1944-09-25
1945	1945-05-02	1945-09-14
1946	1946-04-25	1946-09-11
1947	1947-04-26	1947-09-24
1948	1948-05-26	1948-09-13
1949	1949-04-17	1949-09-27
1952	1952-04-25	1952-09-26
1953	1953-05-05	1953-09-15
1954	1954-05-16	1954-09-26
1955	1955-06-06	1955-09-07
1956	1956-04-21	1956-09-19
1957	1957-04-29	1957-09-24
1958	1958-05-16	1958-09-10
1959	1959-06-01	1959-09-12
1960	1960-05-11	1960-09-18
1962	1962-06-08	1962-09-25
1963	1963-05-20	1963-09-29
1964	1964-05-16	1964-08-23
1965	1965-05-27	1965-08-19
1966	1966-05-02	1966-09-22
1967	1967-05-20	1967-09-28
1968	1968-04-29	1968-09-10
1969	1969-05-10	1969-09-13
1970	1970-05-16	1970-08-31

Every Fixed Threshold

Fixed thresholds at Ephrata
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	49	92	1967	60
35 C (95 F): Days	49	47	1958	17
40 C (104 F): Days	28	7	1938	1
45 C (113 F): Days	1	1	1939	1
90 F (32.2 C): Days	49	70	1958	40
100 F (37.8 C): Days	44	21	1942	2
110 F (43.3 C): Days	3	4	1928	2
0 C (32 F): Ice days (max	48	62	1922	33
0 C (32 F): Frost days (min	50	153	1955	138
-10 C (14 F): Days with min	46	47	1922	19
-20 C (-4 F): Days with min	21	10	1929	1
-30 C (-22 F): Days with min	1	1	1933	1
20 C (68 F): Tropical nights (min	50	31	1958	2
25 C (77 F): Days with min	24	5	1938	1
10 mm (0.39 in): Days with 10 mm or more rain	50	10	1948	5
25 mm (0.98 in): Days with 25 mm or more rain	7	2	1937	1
10 cm (3.9 in): Days with 10 cm or more snowfall	17	4	1965	3
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1965	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1904.

Download the Data

Data for Ephrata 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).

Ephrata Threshold Days by Year (USC00452609)

Key Facts for Ephrata Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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