Donnacona 2 Threshold Days by Year (CA007012071)

13 fixed thresholds counted per year at Donnacona 2 (CA007012071): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Donnacona 2 Thresholds

Donnacona 2: days with a maximum temperature at or below 0 C (32 F) in 31 years, most in 1976 with 113.
Donnacona 2: nights with a minimum temperature at or below 0 C (32 F) in 31 years, most in 1956 with 194.
Donnacona 2: nights with a minimum temperature at or below -10 C (14 F) in 31 years, most in 1978 with 100.
Donnacona 2: nights with a minimum temperature at or below -20 C (-4 F) in 31 years, most in 1962 with 46.
13 fixed thresholds have at least one qualifying day at Donnacona 2.

Days at or above 30 C (86 F)

29 years with a qualifying day

Days per year at Donnacona 2 with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 13 in 1955.

Days at or above 30 C (86 F) per year at Donnacona 2
Year	Days	Decade average
1953	8	6.8
1955	13	6.8
1956	2	6.8
1957	2	6.8
1959	9	6.8
1960	3	3.7
1961	4	3.7
1962	1	3.7
1963	10	3.7
1964	2	3.7
1965	1	3.7
1966	3	3.7
1967	5	3.7
1968	4	3.7
1969	4	3.7
1970	4	5
1971	2	5
1972	2	5
1973	8	5
1974	2	5
1975	7	5
1976	3	5
1977	10	5
1978	7	5
1979	5	5
1980	1	4.8
1981	2	4.8
1982	4	4.8
1983	12	4.8

For each year, a bar from the first to the last day at Donnacona 2 meeting 30 C (86 F).

First to last qualifying date each year at Donnacona 2
Year	First date	Last date
1953	1953-06-17	1953-09-01
1955	1955-06-18	1955-08-20
1956	1956-06-14	1956-06-15
1957	1957-06-22	1957-06-23
1959	1959-06-29	1959-09-10
1960	1960-05-27	1960-08-19
1961	1961-07-22	1961-08-10
1962	1962-05-19	1962-05-19
1963	1963-06-26	1963-07-28
1964	1964-06-30	1964-07-18
1965	1965-06-28	1965-06-28
1966	1966-06-27	1966-07-03
1967	1967-06-02	1967-07-21
1968	1968-07-09	1968-07-19
1969	1969-06-27	1969-08-31
1970	1970-07-09	1970-07-25
1971	1971-05-19	1971-07-26
1972	1972-06-15	1972-07-21
1973	1973-06-27	1973-09-02
1974	1974-07-14	1974-08-22
1975	1975-06-23	1975-07-20
1976	1976-07-06	1976-08-28
1977	1977-05-22	1977-08-29
1978	1978-05-27	1978-08-16
1979	1979-06-16	1979-07-25
1980	1980-06-25	1980-06-25
1981	1981-07-08	1981-07-10
1982	1982-07-07	1982-07-18
1983	1983-06-14	1983-09-06

Every Fixed Threshold

Fixed thresholds at Donnacona 2
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	29	13	1955	12
90 F (32.2 C): Days	11	3	1953	2
0 C (32 F): Ice days (max	31	113	1976	88
0 C (32 F): Frost days (min	31	194	1956	168
-10 C (14 F): Days with min	31	100	1978	60
-20 C (-4 F): Days with min	31	46	1962	21
-30 C (-22 F): Days with min	27	9	1963	6
20 C (68 F): Tropical nights (min	24	8	1975	3
10 mm (0.39 in): Days with 10 mm or more rain	28	51	1983	51
25 mm (0.98 in): Days with 25 mm or more rain	28	12	1954	10
50 mm (1.97 in): Days with 50 mm or more rain	11	2	1972	2
10 cm (3.9 in): Days with 10 cm or more snowfall	28	14	1971	10
25 cm (9.8 in): Days with 25 cm or more snowfall	10	2	1963	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1953.

Download the Data

Data for Donnacona 2 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).

Donnacona 2 Threshold Days by Year (CA007012071)

Key Facts for Donnacona 2 Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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