Donnacona Threshold Days by Year (CA007012070)

17 fixed thresholds counted per year at Donnacona (CA007012070): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Donnacona Thresholds

Donnacona: days with 10 mm (0.39 in) or more of precipitation in 37 years, most in 1936 with 48.
Donnacona: days with 25 mm (0.98 in) or more of precipitation in 37 years, most in 1920 with 16.
Donnacona: days with 10 cm (3.9 in) or more of snowfall in 37 years, most in 1920 with 14.
Donnacona: days with 25 cm (9.8 in) or more of snowfall in 23 years, most in 1940 with 4.
17 fixed thresholds have at least one qualifying day at Donnacona.

Days at or above 30 C (86 F)

22 years with a qualifying day

Days per year at Donnacona with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 22 in 1921.

Days at or above 30 C (86 F) per year at Donnacona
Year	Days	Decade average
1919	15	15
1920	6	9.7
1921	22	9.7
1922	12	9.7
1923	7	9.7
1924	7	9.7
1925	12	9.7
1926	8	9.7
1927	5	9.7
1928	13	9.7
1929	5	9.7
1930	4	12.5
1931	14	12.5
1932	8	12.5
1935	13	12.5
1936	5	12.5
1937	19	12.5
1938	18	12.5
1939	19	12.5
1940	4	6
1941	12	6
1942	2	6

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

First to last qualifying date each year at Donnacona
Year	First date	Last date
1919	1919-06-03	1919-09-22
1920	1920-08-08	1920-08-29
1921	1921-05-29	1921-09-02
1922	1922-06-07	1922-09-11
1923	1923-06-19	1923-08-07
1924	1924-07-06	1924-08-07
1925	1925-06-04	1925-08-25
1926	1926-07-20	1926-08-09
1927	1927-07-01	1927-07-16
1928	1928-07-02	1928-08-27
1929	1929-05-29	1929-06-24
1930	1930-06-06	1930-06-30
1931	1931-06-14	1931-08-24
1932	1932-05-16	1932-08-26
1935	1935-07-05	1935-08-20
1936	1936-06-10	1936-08-09
1937	1937-06-24	1937-09-03
1938	1938-06-14	1938-08-21
1939	1939-06-29	1939-08-26
1940	1940-07-22	1940-08-18
1941	1941-06-20	1941-08-02
1942	1942-06-11	1942-06-12

Every Fixed Threshold

Fixed thresholds at Donnacona
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	22	22	1921	2
35 C (95 F): Days	4	2	1928	1
90 F (32.2 C): Days	14	8	1921	1
0 C (32 F): Ice days (max	22	109	1926	96
0 C (32 F): Frost days (min	22	190	1940	179
-10 C (14 F): Days with min	22	103	1926	95
-20 C (-4 F): Days with min	22	49	1935	32
-30 C (-22 F): Days with min	15	7	1935	7
20 C (68 F): Tropical nights (min	16	19	1937	2
25 C (77 F): Days with min	1	1	1939	1
10 mm (0.39 in): Days with 10 mm or more rain	37	48	1936	32
25 mm (0.98 in): Days with 25 mm or more rain	37	16	1920	5
50 mm (1.97 in): Days with 50 mm or more rain	19	3	1920	1
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1935	1
10 cm (3.9 in): Days with 10 cm or more snowfall	37	14	1920	10
25 cm (9.8 in): Days with 25 cm or more snowfall	23	4	1940	2
50 cm (19.7 in): Days with 50 cm or more snowfall	1	1	1924	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1919.

Download the Data

Data for Donnacona 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 Threshold Days by Year (CA007012070)

Key Facts for Donnacona Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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