Vivian Threshold Days by Year (USC00398727)

19 fixed thresholds counted per year at Vivian (USC00398727): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Vivian Thresholds

Vivian: days with a maximum temperature at or above 30 C (86 F) in 52 years, most in 1934 with 111.
Vivian: days with a maximum temperature at or above 35 C (95 F) in 52 years, most in 1936 with 62.
Vivian: days with a maximum temperature at or above 90 F (32.2 C) in 52 years, most in 1934 with 89.
Vivian: days with a maximum temperature at or below 0 C (32 F) in 52 years, most in 1936 with 73.
19 fixed thresholds have at least one qualifying day at Vivian.

Days at or above 30 C (86 F)

52 years with a qualifying day

Days per year at Vivian with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 111 in 1934.

Days at or above 30 C (86 F) per year at Vivian
Year	Days	Decade average
1915	17	51.8
1916	62	51.8
1917	53	51.8
1918	62	51.8
1919	65	51.8
1921	77	71.8
1922	68	71.8
1923	62	71.8
1924	58	71.8
1925	79	71.8
1926	81	71.8
1927	67	71.8
1928	77	71.8
1929	77	71.8
1930	74	90.6
1931	102	90.6
1932	72	90.6
1934	111	90.6
1935	80	90.6
1936	107	90.6
1937	81	90.6
1938	83	90.6
1939	105	90.6
1940	90	72
1941	82	72
1942	56	72
1943	75	72
1944	56	72
1945	62	72
1948	77	72
1949	78	72
1950	49	68
1951	34	68
1952	86	68
1954	69	68
1957	66	68
1958	73	68
1959	99	68
1960	71	69.5
1961	90	69.5
1962	55	69.5
1963	85	69.5
1964	72	69.5
1965	60	69.5
1966	73	69.5
1967	68	69.5
1968	60	69.5
1969	61	69.5
1970	95	83.3
1971	84	83.3
1973	79	83.3
1974	75	83.3

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

First to last qualifying date each year at Vivian
Year	First date	Last date
1915	1915-05-12	1915-10-22
1916	1916-05-05	1916-09-30
1917	1917-05-16	1917-09-22
1918	1918-05-03	1918-10-16
1919	1919-05-27	1919-09-27
1921	1921-04-04	1921-10-04
1922	1922-06-04	1922-10-09
1923	1923-04-18	1923-09-23
1924	1924-04-23	1924-10-17
1925	1925-05-18	1925-09-19
1926	1926-04-15	1926-10-07
1927	1927-04-26	1927-10-26
1928	1928-05-01	1928-10-11
1929	1929-05-22	1929-10-05
1930	1930-04-08	1930-09-23
1931	1931-04-11	1931-10-05
1932	1932-05-12	1932-10-16
1934	1934-04-21	1934-10-12
1935	1935-06-09	1935-10-15
1936	1936-04-13	1936-10-08
1937	1937-05-14	1937-10-03
1938	1938-04-29	1938-10-27
1939	1939-04-22	1939-10-01
1940	1940-05-03	1940-10-25
1941	1941-05-13	1941-09-20
1942	1942-04-14	1942-10-11
1943	1943-03-30	1943-10-10
1944	1944-05-13	1944-09-26
1945	1945-05-24	1945-10-16
1948	1948-04-18	1948-09-28
1949	1949-04-24	1949-10-05
1950	1950-05-22	1950-10-30
1951	1951-07-06	1951-10-01
1952	1952-04-27	1952-09-29
1954	1954-05-20	1954-10-08
1957	1957-05-07	1957-10-01
1958	1958-04-16	1958-10-16
1959	1959-04-06	1959-09-19
1960	1960-05-13	1960-10-08
1961	1961-04-19	1961-10-16
1962	1962-04-24	1962-10-15
1963	1963-05-06	1963-10-13
1964	1964-04-16	1964-10-15
1965	1965-04-29	1965-10-15
1966	1966-05-04	1966-09-12
1967	1967-05-22	1967-10-04
1968	1968-04-30	1968-10-13
1969	1969-05-14	1969-09-30
1970	1970-04-07	1970-10-05
1971	1971-04-07	1971-09-14
1973	1973-05-18	1973-09-10
1974	1974-06-03	1974-10-21

Every Fixed Threshold

Fixed thresholds at Vivian
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	52	111	1934	75
35 C (95 F): Days	52	62	1936	36
40 C (104 F): Days	42	36	1936	11
45 C (113 F): Days	4	3	1936	1
90 F (32.2 C): Days	52	89	1934	52
100 F (37.8 C): Days	51	52	1936	17
110 F (43.3 C): Days	16	14	1936	2
0 C (32 F): Ice days (max	52	73	1936	29
0 C (32 F): Frost days (min	49	186	1924	176
-10 C (14 F): Days with min	49	91	1932	56
-20 C (-4 F): Days with min	49	48	1916	14
-30 C (-22 F): Days with min	38	14	1936	1
20 C (68 F): Tropical nights (min	49	32	1928	13
25 C (77 F): Days with min	22	4	1922	1
10 mm (0.39 in): Days with 10 mm or more rain	48	25	1915	12
25 mm (0.98 in): Days with 25 mm or more rain	46	8	1919	4
50 mm (1.97 in): Days with 50 mm or more rain	18	2	1973	2
10 cm (3.9 in): Days with 10 cm or more snowfall	21	5	1966	1
25 cm (9.8 in): Days with 25 cm or more snowfall	2	1	1951	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1915.

Download the Data

Data for Vivian 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).

Vivian Threshold Days by Year (USC00398727)

Key Facts for Vivian Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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