Vienna Threshold Days by Year (USC00189140)

18 fixed thresholds counted per year at Vienna (USC00189140): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Vienna Thresholds

Vienna: days with 10 mm (0.39 in) or more of precipitation in 54 years, most in 1964 with 50.
Vienna: days with 25 mm (0.98 in) or more of precipitation in 54 years, most in 1958 with 20.
Vienna: nights with a minimum temperature at or below 0 C (32 F) in 50 years, most in 1960 with 104.
Vienna: nights with a minimum temperature at or above 20 C (68 F) in 50 years, most in 1959 with 74.
18 fixed thresholds have at least one qualifying day at Vienna.

Days at or above 30 C (86 F)

45 years with a qualifying day

Days per year at Vienna with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 94 in 1986.

Days at or above 30 C (86 F) per year at Vienna
Year	Days	Decade average
1950	46	59.4
1951	58	59.4
1952	57	59.4
1953	58	59.4
1954	54	59.4
1955	55	59.4
1956	59	59.4
1957	75	59.4
1958	53	59.4
1959	79	59.4
1960	61	58.7
1961	70	58.7
1962	51	58.7
1963	56	58.7
1964	54	58.7
1965	61	58.7
1966	60	58.7
1967	45	58.7
1968	70	58.7
1970	85	65.5
1971	70	65.5
1972	49	65.5
1973	80	65.5
1974	37	65.5
1975	67	65.5
1976	62	65.5
1977	72	65.5
1978	79	65.5
1979	54	65.5
1981	68	71.7
1982	63	71.7
1983	78	71.7
1984	62	71.7
1985	70	71.7
1986	94	71.7
1989	67	71.7
1994	71	76.2
1995	80	76.2
1996	67	76.2
1997	69	76.2
1998	94	76.2
2000	62	74.3
2005	81	74.3
2006	68	74.3
2007	86	74.3

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

First to last qualifying date each year at Vienna
Year	First date	Last date
1950	1950-05-06	1950-10-02
1951	1951-05-23	1951-10-07
1952	1952-06-06	1952-09-14
1953	1953-05-11	1953-09-05
1954	1954-05-02	1954-10-04
1955	1955-05-05	1955-09-20
1956	1956-05-13	1956-09-17
1957	1957-04-21	1957-09-16
1958	1958-06-09	1958-09-17
1959	1959-05-22	1959-10-06
1960	1960-04-16	1960-09-20
1961	1961-04-25	1961-09-25
1962	1962-05-06	1962-09-14
1963	1963-04-03	1963-09-20
1964	1964-04-18	1964-09-12
1965	1965-06-02	1965-09-23
1966	1966-06-08	1966-09-11
1967	1967-04-03	1967-10-05
1968	1968-05-17	1968-09-25
1970	1970-05-09	1970-09-27
1971	1971-05-18	1971-09-21
1972	1972-06-03	1972-09-17
1973	1973-06-02	1973-09-30
1974	1974-04-29	1974-08-30
1975	1975-05-21	1975-10-15
1976	1976-04-16	1976-09-13
1977	1977-04-12	1977-09-20
1978	1978-05-20	1978-09-19
1979	1979-05-11	1979-09-11
1981	1981-05-25	1981-09-15
1982	1982-05-07	1982-09-18
1983	1983-06-12	1983-09-20
1984	1984-05-21	1984-09-26
1985	1985-04-19	1985-10-16
1986	1986-05-06	1986-10-09
1989	1989-05-26	1989-09-22
1994	1994-05-23	1994-09-17
1995	1995-05-25	1995-09-15
1996	1996-05-19	1996-09-11
1997	1997-05-19	1997-10-10
1998	1998-03-29	1998-10-01
2000	2000-05-06	2000-10-06
2005	2005-04-20	2005-10-16
2006	2006-05-27	2006-09-06
2007	2007-04-30	2007-10-10

Every Fixed Threshold

Fixed thresholds at Vienna
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	45	94	1986	86
35 C (95 F): Days	40	20	1983	7
40 C (104 F): Days	1	1	1997	1
90 F (32.2 C): Days	45	66	1986	50
100 F (37.8 C): Days	8	6	1986	3
0 C (32 F): Ice days (max	43	16	1977	6
0 C (32 F): Frost days (min	50	104	1960	80
-10 C (14 F): Days with min	46	19	1989	4
-20 C (-4 F): Days with min	4	1	1957	1
20 C (68 F): Tropical nights (min	50	74	1959	29
25 C (77 F): Days with min	40	7	2005	1
10 mm (0.39 in): Days with 10 mm or more rain	54	50	1964	33
25 mm (0.98 in): Days with 25 mm or more rain	54	20	1958	10
50 mm (1.97 in): Days with 50 mm or more rain	50	7	1979	2
100 mm (3.94 in): Days with 100 mm or more rain	13	2	1973	2
10 cm (3.9 in): Days with 10 cm or more snowfall	19	6	1967	1
25 cm (9.8 in): Days with 25 cm or more snowfall	4	1	1966	1
50 cm (19.7 in): Days with 50 cm or more snowfall	1	1	1979	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1950.

Download the Data

Data for Vienna 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).

Vienna Threshold Days by Year (USC00189140)

Key Facts for Vienna Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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