Oliver Threshold Days by Year (CA001125760)

16 fixed thresholds counted per year at Oliver (CA001125760): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Oliver Thresholds

Oliver: days with a maximum temperature at or above 30 C (86 F) in 44 years, most in 1940 with 74.
Oliver: days with a maximum temperature at or above 90 F (32.2 C) in 44 years, most in 1940 with 47.
Oliver: days with a maximum temperature at or below 0 C (32 F) in 44 years, most in 1955 with 51.
Oliver: nights with a minimum temperature at or below 0 C (32 F) in 44 years, most in 1948 with 174.
16 fixed thresholds have at least one qualifying day at Oliver.

Days at or above 30 C (86 F)

44 years with a qualifying day

Days per year at Oliver with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 74 in 1940.

Days at or above 30 C (86 F) per year at Oliver
Year	Days	Decade average
1939	41	41
1940	74	48.6
1941	45	48.6
1942	48	48.6
1943	45	48.6
1944	60	48.6
1945	60	48.6
1946	45	48.6
1947	41	48.6
1948	25	48.6
1949	43	48.6
1950	41	35.7
1951	37	35.7
1952	37	35.7
1953	26	35.7
1954	21	35.7
1955	37	35.7
1956	44	35.7
1957	21	35.7
1958	65	35.7
1959	28	35.7
1960	37	37.9
1961	56	37.9
1962	30	37.9
1963	35	37.9
1964	19	37.9
1965	39	37.9
1966	31	37.9
1967	63	37.9
1968	24	37.9
1969	45	37.9
1970	46	34.9
1971	45	34.9
1972	36	34.9
1973	41	34.9
1974	36	34.9
1975	23	34.9
1976	15	34.9
1977	39	34.9
1978	28	34.9
1979	40	34.9
1980	21	28.3
1982	34	28.3
1983	30	28.3

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

First to last qualifying date each year at Oliver
Year	First date	Last date
1939	1939-05-12	1939-09-08
1940	1940-05-10	1940-09-25
1941	1941-05-23	1941-08-22
1942	1942-05-21	1942-09-23
1943	1943-05-24	1943-09-12
1944	1944-05-27	1944-09-12
1945	1945-05-28	1945-09-14
1946	1946-04-25	1946-09-10
1947	1947-04-27	1947-09-21
1948	1948-05-26	1948-09-13
1949	1949-05-07	1949-09-08
1950	1950-06-11	1950-09-05
1951	1951-05-21	1951-08-21
1952	1952-05-27	1952-09-25
1953	1953-07-05	1953-08-19
1954	1954-05-17	1954-08-13
1955	1955-06-08	1955-09-10
1956	1956-05-16	1956-09-17
1957	1957-04-29	1957-09-14
1958	1958-05-18	1958-09-07
1959	1959-06-19	1959-08-09
1960	1960-06-23	1960-08-18
1961	1961-05-20	1961-08-28
1962	1962-06-15	1962-09-06
1963	1963-05-20	1963-09-11
1964	1964-06-23	1964-08-22
1965	1965-06-02	1965-08-19
1966	1966-05-04	1966-09-05
1967	1967-06-06	1967-09-21
1968	1968-06-18	1968-08-11
1969	1969-05-23	1969-09-12
1970	1970-06-01	1970-08-24
1971	1971-05-11	1971-08-30
1972	1972-05-28	1972-09-04
1973	1973-05-13	1973-09-11
1974	1974-06-10	1974-08-31
1975	1975-06-01	1975-08-15
1976	1976-06-28	1976-09-01
1977	1977-04-25	1977-08-22
1978	1978-07-03	1978-08-10
1979	1979-06-01	1979-08-29
1980	1980-07-01	1980-09-06
1982	1982-06-10	1982-09-08
1983	1983-05-23	1983-08-19

Every Fixed Threshold

Fixed thresholds at Oliver
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	44	74	1940	30
35 C (95 F): Days	39	21	1945	1
40 C (104 F): Days	4	1	1939	1
90 F (32.2 C): Days	44	47	1940	12
100 F (37.8 C): Days	15	9	1939	2
0 C (32 F): Ice days (max	44	51	1955	29
0 C (32 F): Frost days (min	44	174	1948	112
-10 C (14 F): Days with min	43	53	1949	14
-20 C (-4 F): Days with min	25	17	1950	2
-30 C (-22 F): Days with min	1	2	1950	2
20 C (68 F): Tropical nights (min	19	5	1960	1
10 mm (0.39 in): Days with 10 mm or more rain	27	17	1983	17
25 mm (0.98 in): Days with 25 mm or more rain	6	2	1968	1
50 mm (1.97 in): Days with 50 mm or more rain	1	1	1977	1
10 cm (3.9 in): Days with 10 cm or more snowfall	14	4	1971	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1973	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1939.

Download the Data

Data for Oliver 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Oliver Threshold Days by Year (CA001125760)

Key Facts for Oliver Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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