Whiteriver 1 SW Threshold Days by Year

17 fixed thresholds counted per year at Whiteriver 1 SW (USC00029271): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Whiteriver 1 SW Thresholds

Whiteriver 1 SW: days with 10 mm (0.39 in) or more of precipitation in 87 years, most in 1905 with 32.
Whiteriver 1 SW: days with 25 mm (0.98 in) or more of precipitation in 79 years, most in 1905 with 8.
Whiteriver 1 SW: nights with a minimum temperature at or below 0 C (32 F) in 75 years, most in 1909 with 184.
Whiteriver 1 SW: nights with a minimum temperature at or below -10 C (14 F) in 74 years, most in 1912 with 57.
17 fixed thresholds have at least one qualifying day at Whiteriver 1 SW.

Days at or above 30 C (86 F)

70 years with a qualifying day

Days per year at Whiteriver 1 SW with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 122 in 1942.

Days at or above 30 C (86 F) per year at Whiteriver 1 SW
Year	Days	Decade average
1900	96	83.4
1901	79	83.4
1902	88	83.4
1903	88	83.4
1904	95	83.4
1905	101	83.4
1906	67	83.4
1907	65	83.4
1908	75	83.4
1909	80	83.4
1910	105	83.3
1911	75	83.3
1912	61	83.3
1913	85	83.3
1914	92	83.3
1915	82	83.3
1922	107	85
1923	55	85
1924	99	85
1925	75	85
1926	88	85
1927	80	85
1928	97	85
1929	79	85
1930	79	90
1931	92	90
1932	99	90
1941	96	96.7
1942	122	96.7
1943	113	96.7
1944	89	96.7
1945	92	96.7
1946	85	96.7
1947	94	96.7
1948	90	96.7
1949	89	96.7
1950	88	86.4
1951	106	86.4
1952	91	86.4
1953	92	86.4
1954	77	86.4
1955	65	86.4
1956	104	86.4
1957	68	86.4
1960	103	78.1
1961	76	78.1
1962	88	78.1
1963	82	78.1
1964	77	78.1
1965	67	78.1
1966	88	78.1
1967	51	78.1
1968	56	78.1
1969	93	78.1
1970	75	70.8
1971	68	70.8
1972	59	70.8
1973	75	70.8
1974	79	70.8
1975	63	70.8
1976	56	70.8
1977	65	70.8
1978	85	70.8
1979	83	70.8
1980	83	76
1981	77	76
1982	60	76
1983	88	76
1984	70	76
1985	78	76

For each year, a bar from the first to the last day at Whiteriver 1 SW meeting 30 C (86 F).

First to last qualifying date each year at Whiteriver 1 SW
Year	First date	Last date
1900	1900-03-31	1900-09-17
1901	1901-05-03	1901-10-02
1902	1902-04-07	1902-09-13
1903	1903-05-12	1903-09-10
1904	1904-05-16	1904-10-04
1905	1905-05-16	1905-09-23
1906	1906-05-18	1906-09-22
1907	1907-04-07	1907-09-25
1908	1908-06-08	1908-09-23
1909	1909-06-02	1909-11-02
1910	1910-04-26	1910-10-09
1911	1911-05-31	1911-09-28
1912	1912-05-22	1912-09-19
1913	1913-05-22	1913-09-21
1914	1914-04-14	1914-09-29
1915	1915-05-31	1915-10-09
1922	1922-05-23	1922-10-09
1923	1923-05-03	1923-09-07
1924	1924-05-17	1924-09-24
1925	1925-05-17	1925-10-26
1926	1926-05-22	1926-09-25
1927	1927-05-13	1927-09-23
1928	1928-04-30	1928-10-08
1929	1929-05-19	1929-10-07
1930	1930-05-27	1930-09-20
1931	1931-05-14	1931-09-30
1932	1932-05-16	1932-09-19
1941	1941-05-09	1941-09-27
1942	1942-04-22	1942-10-02
1943	1943-04-05	1943-10-17
1944	1944-05-14	1944-09-23
1945	1945-06-13	1945-09-18
1946	1946-05-06	1946-09-25
1947	1947-05-01	1947-10-04
1948	1948-05-13	1948-10-03
1949	1949-05-24	1949-10-04
1950	1950-04-22	1950-10-21
1951	1951-05-26	1951-09-29
1952	1952-06-08	1952-10-06
1953	1953-05-27	1953-10-10
1954	1954-05-07	1954-10-02
1955	1955-05-29	1955-10-14
1956	1956-05-18	1956-10-07
1957	1957-06-01	1957-10-08
1960	1960-05-11	1960-09-29
1961	1961-05-20	1961-09-29
1962	1962-04-19	1962-09-22
1963	1963-05-07	1963-10-03
1964	1964-05-16	1964-10-05
1965	1965-05-30	1965-10-12
1966	1966-05-08	1966-10-12
1967	1967-05-20	1967-09-22
1968	1968-05-27	1968-09-12
1969	1969-05-22	1969-10-01
1970	1970-05-17	1970-09-12
1971	1971-06-14	1971-09-17
1972	1972-05-29	1972-10-02
1973	1973-05-19	1973-09-19
1974	1974-05-12	1974-09-12
1975	1975-06-02	1975-09-03
1976	1976-05-15	1976-09-15
1977	1977-05-31	1977-10-03
1978	1978-05-14	1978-10-05
1979	1979-06-13	1979-10-08
1980	1980-06-08	1980-10-10
1981	1981-06-06	1981-09-29
1982	1982-06-12	1982-09-26
1983	1983-05-24	1983-09-19
1984	1984-05-14	1984-09-15
1985	1985-05-29	1985-09-17

Every Fixed Threshold

Fixed thresholds at Whiteriver 1 SW
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	70	122	1942	78
35 C (95 F): Days	70	55	1942	17
40 C (104 F): Days	6	2	1957	2
90 F (32.2 C): Days	70	99	1942	47
100 F (37.8 C): Days	39	9	1943	2
0 C (32 F): Ice days (max	31	8	1913	1
0 C (32 F): Frost days (min	75	184	1909	129
-10 C (14 F): Days with min	74	57	1912	9
-20 C (-4 F): Days with min	14	5	1971	5
20 C (68 F): Tropical nights (min	21	3	1913	6
25 C (77 F): Days with min	1	0	n/a	1
10 mm (0.39 in): Days with 10 mm or more rain	87	32	1905	13
25 mm (0.98 in): Days with 25 mm or more rain	79	8	1905	3
50 mm (1.97 in): Days with 50 mm or more rain	20	2	1905	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1932	1
10 cm (3.9 in): Days with 10 cm or more snowfall	60	7	1952	1
25 cm (9.8 in): Days with 25 cm or more snowfall	11	2	1905	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1900.

Download the Data

Data for Whiteriver 1 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

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

Whiteriver 1 SW Threshold Days by Year

Key Facts for Whiteriver 1 SW Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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