Wistaria Threshold Days by Year

13 fixed thresholds counted per year at Wistaria (CA001088970): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Wistaria Thresholds

Wistaria: days with a maximum temperature at or below 0 C (32 F) in 58 years, most in 1955 with 108.
Wistaria: nights with a minimum temperature at or below 0 C (32 F) in 58 years, most in 1955 with 247.
Wistaria: nights with a minimum temperature at or below -10 C (14 F) in 58 years, most in 1927 with 106.
Wistaria: nights with a minimum temperature at or below -20 C (-4 F) in 58 years, most in 1936 with 46.
13 fixed thresholds have at least one qualifying day at Wistaria.

Days at or above 30 C (86 F)

29 years with a qualifying day

Days per year at Wistaria with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 26 in 1927.

Days at or above 30 C (86 F) per year at Wistaria
Year	Days	Decade average
1926	6	12.5
1927	26	12.5
1928	16	12.5
1929	2	12.5
1930	17	6.5
1931	14	6.5
1932	13	6.5
1934	2	6.5
1935	1	6.5
1936	3	6.5
1938	1	6.5
1939	1	6.5
1941	4	3
1942	2	3
1951	2	2
1952	3	2
1953	1	2
1956	1	2
1958	3	2
1960	4	3.5
1961	2	3.5
1965	2	3.5
1969	6	3.5
1971	5	2.7
1974	1	2.7
1977	2	2.7
1981	5	3
1982	2	3
1983	2	3

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

First to last qualifying date each year at Wistaria
Year	First date	Last date
1926	1926-07-09	1926-08-12
1927	1927-07-15	1927-09-20
1928	1928-06-20	1928-09-02
1929	1929-09-09	1929-09-16
1930	1930-07-09	1930-09-04
1931	1931-06-15	1931-08-17
1932	1932-05-28	1932-08-24
1934	1934-07-27	1934-08-26
1935	1935-07-21	1935-07-21
1936	1936-05-30	1936-08-03
1938	1938-07-21	1938-07-21
1939	1939-08-09	1939-08-09
1941	1941-07-14	1941-07-17
1942	1942-06-30	1942-08-15
1951	1951-07-10	1951-07-11
1952	1952-07-30	1952-08-12
1953	1953-07-06	1953-07-06
1956	1956-07-19	1956-07-19
1958	1958-07-16	1958-07-28
1960	1960-07-29	1960-08-10
1961	1961-07-13	1961-08-04
1965	1965-07-30	1965-07-31
1969	1969-06-09	1969-06-18
1971	1971-07-26	1971-07-31
1974	1974-08-29	1974-08-29
1977	1977-08-11	1977-08-20
1981	1981-08-07	1981-08-11
1982	1982-07-27	1982-07-28
1983	1983-05-28	1983-05-29

Every Fixed Threshold

Fixed thresholds at Wistaria
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	29	26	1927	2
35 C (95 F): Days	4	3	1927	1
90 F (32.2 C): Days	10	10	1927	1
0 C (32 F): Ice days (max	58	108	1955	85
0 C (32 F): Frost days (min	58	247	1955	218
-10 C (14 F): Days with min	58	106	1927	51
-20 C (-4 F): Days with min	58	46	1936	15
-30 C (-22 F): Days with min	45	20	1950	3
-40 C (-40 F): Days with min	8	3	1950	1
10 mm (0.39 in): Days with 10 mm or more rain	58	14	1926	8
25 mm (0.98 in): Days with 25 mm or more rain	27	4	1934	1
10 cm (3.9 in): Days with 10 cm or more snowfall	57	9	1966	3
25 cm (9.8 in): Days with 25 cm or more snowfall	6	1	1928	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1926.

Download the Data

Data for Wistaria 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-14. Last revised 14 October 2026 (2026-10-14).

Wistaria Threshold Days by Year

Key Facts for Wistaria Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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