Donnacona Weather Records (CA007012070)

Record envelope, standing records and threshold days for Donnacona (CA007012070), Quebec, Canada, with 47 years of record.

Key Facts for Donnacona

Donnacona (CA007012070) is a weather station in Quebec, Canada at 46.67 latitude and -71.75 longitude, 11 m (36 ft) above sea level.
The station reports from 1918 to 1964, 47 years of record.
1,464 records set at Donnacona still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Donnacona set a daily record precipitation of 27.7 mm (1.1 in) on 10 June 1964.

About the Station

Location: Quebec, Canada, 46.67 latitude, -71.75 longitude.
Elevation: 11 m (36 ft).
Period of record: 1918 to 1964, 47 years.
Eligible elements: tmax, tmin, prcp, snow.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Donnacona. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Donnacona, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	10.0 C (50.0 F)	-37.8 C (-36.0 F)	n/a	n/a
Feb	7.2 C (45.0 F)	-38.9 C (-38.0 F)	n/a	n/a
Mar	17.8 C (64.0 F)	-32.2 C (-26.0 F)	n/a	n/a
Apr	27.8 C (82.0 F)	-18.9 C (-2.0 F)	n/a	n/a
May	31.1 C (88.0 F)	-6.7 C (19.9 F)	n/a	n/a
Jun	35.6 C (96.1 F)	-0.6 C (30.9 F)	n/a	n/a
Jul	36.7 C (98.1 F)	3.9 C (39.0 F)	n/a	n/a
Aug	36.7 C (98.1 F)	1.1 C (34.0 F)	n/a	n/a
Sep	31.7 C (89.1 F)	-2.2 C (28.0 F)	n/a	n/a
Oct	25.6 C (78.1 F)	-7.2 C (19.0 F)	n/a	n/a
Nov	18.9 C (66.0 F)	-22.8 C (-9.0 F)	n/a	n/a
Dec	10.6 C (51.1 F)	-36.7 C (-34.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Donnacona still stand. 1936 holds the most, with 73.

Standing records at Donnacona by the year they were set
Year set	Standing records
1918	27
1919	60
1920	57
1921	69
1922	63
1923	72
1924	30
1925	47
1926	26
1927	48
1928	44
1929	44
1930	38
1931	58
1932	53
1933	70
1934	46
1935	35
1936	73
1937	63
1938	60
1939	50
1940	48
1941	38
1942	43
1943	26
1944	33
1945	29
1946	38
1962	13
1963	33
1964	30

Wettest Day of Each Month

Aug: 121.9 mm (4.8 in)

The wettest day on record for each calendar month at Donnacona. The most was 121.9 mm (4.8 in) on 21 August 1935.

Record daily precipitation for each month at Donnacona
Month	Record daily precipitation (mm)	Date
Jan	47.0 mm (1.9 in)	11 January 1922
Feb	50.8 mm (2.0 in)	21 February 1924
Mar	45.7 mm (1.8 in)	8 March 1956
Apr	55.1 mm (2.2 in)	12 April 1920
May	56.6 mm (2.2 in)	17 May 1945
Jun	68.6 mm (2.7 in)	2 June 1954
Jul	87.4 mm (3.4 in)	10 July 1945
Aug	121.9 mm (4.8 in)	21 August 1935
Sep	81.8 mm (3.2 in)	1 September 1945
Oct	93.5 mm (3.7 in)	24 October 1923
Nov	58.4 mm (2.3 in)	6 November 1948
Dec	57.9 mm (2.3 in)	15 December 1918

Period of Record Coverage

1918 to 1964

32 years of record at Donnacona, 1918 to 1964. 10 years have data for under 90 percent of days and are left out of rankings: 1918, 1933, 1934, 1943, 1944, 1945, 1946, 1962 and others.

Days with data per year at Donnacona
Year	Days with data	Share of year	Complete
1918	161	44%	No
1919	362	99%	Yes
1920	366	100%	Yes
1921	365	100%	Yes
1922	365	100%	Yes
1923	365	100%	Yes
1924	366	100%	Yes
1925	365	100%	Yes
1926	365	100%	Yes
1927	365	100%	Yes
1928	366	100%	Yes
1929	365	100%	Yes
1930	364	100%	Yes
1931	365	100%	Yes
1932	365	100%	Yes
1933	304	83%	No
1934	212	58%	No
1935	334	92%	Yes
1936	366	100%	Yes
1937	365	100%	Yes
1938	364	100%	Yes
1939	364	100%	Yes
1940	366	100%	Yes
1941	365	100%	Yes
1942	363	99%	Yes
1943	245	67%	No
1944	244	67%	No
1945	276	76%	No
1946	276	76%	No
1962	145	40%	No
1963	248	68%	No
1964	212	58%	No

Latest Records

Latest records at Donnacona
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
10 June 1964	Donnacona, CA	daily rain	27.7 mm (1.1 in)	12.0 mm (0.5 in)	14 years	19 of 100 (Routine)
3 November 1963	Donnacona, CA	daily snowfall	2.5 cm (1.0 in)	1.2 cm (0.5 in)	20 years	12 of 100 (Routine)
2 November 1963	Donnacona, CA	daily snowfall	25.4 cm (10.0 in)	20.3 cm (8.0 in)	36 years	51 of 100 (Notable)
2 November 1963	Donnacona, CA	daily rain	31.8 mm (1.3 in)	16.6 mm (0.7 in)	26 years	34 of 100 (Routine)
11 October 1963	Donnacona, CA	daily rain	18.0 mm (0.7 in)	0.2 mm (0.01 in)	8 years	6 of 100 (Routine)
5 August 1963	Donnacona, CA	daily rain	28.4 mm (1.1 in)	13.4 mm (0.5 in)	28 years	21 of 100 (Routine)
1 May 1963	Donnacona, CA	daily rain	12.2 mm (0.5 in)	0.5 mm (0.02 in)	37 years	15 of 100 (Routine)
21 April 1963	Donnacona, CA	daily rain	21.6 mm (0.9 in)	7.6 mm (0.30 in)	2 years	13 of 100 (Routine)
23 December 1962	Donnacona, CA	daily snowfall	24.1 cm (9.5 in)	13.9 cm (5.5 in)	28 years	36 of 100 (Notable)
23 December 1962	Donnacona, CA	daily rain	24.1 mm (0.9 in)	13.9 mm (0.5 in)	28 years	20 of 100 (Routine)
22 December 1962	Donnacona, CA	daily snowfall	20.3 cm (8.0 in)	7.6 cm (3.0 in)	28 years	25 of 100 (Routine)
22 December 1962	Donnacona, CA	daily rain	20.3 mm (0.8 in)	0.5 mm (0.02 in)	44 years	17 of 100 (Routine)
9 December 1962	Donnacona, CA	daily rain	10.2 mm (0.4 in)	1.1 mm (0.04 in)	24 years	12 of 100 (Routine)
9 December 1962	Donnacona, CA	daily snowfall	10.2 cm (4.0 in)	2.6 cm (1.0 in)	11 years	11 of 100 (Routine)
10 November 1962	Donnacona, CA	daily rain	33.0 mm (1.3 in)	14.7 mm (0.6 in)	29 years	32 of 100 (Routine)
28 October 1962	Donnacona, CA	monthly snowfall (Tie)	11.4 cm (4.5 in)	tie	29 years	5 of 100 (Routine)
26 October 1962	Donnacona, CA	daily snowfall	5.1 cm (2.0 in)	3.8 cm (1.5 in)	25 years	18 of 100 (Routine)
17 September 1962	Donnacona, CA	daily rain	33.0 mm (1.3 in)	15.0 mm (0.6 in)	28 years	25 of 100 (Routine)
4 August 1962	Donnacona, CA	daily rain	25.4 mm (1.0 in)	6.3 mm (0.25 in)	23 years	14 of 100 (Routine)
11 August 1961	Donnacona, CA	daily rain	39.6 mm (1.6 in)	0.7 mm (0.03 in)	7 years	6 of 100 (Routine)

Climate Trend

21 complete years, 1919 to 1942

One stripe for each of 21 complete years at Donnacona, 1919 to 1942. Blue stripes are years cooler than the station's own mean of 4.7 C (40.5 F); red stripes are warmer. The coolest year was 1940, at 3.6 C (38.4 F), and the warmest was 1931, at 6.5 C (43.7 F). The strongest colour marks a difference of 1.8 C (3.2 F).

Annual mean temperature at Donnacona as warming stripes, 1919 to 1942
Year	Annual mean temperature	Difference from the station mean
1919	4.3 C	-0.41 C
1920	4.6 C	-0.10 C
1921	5.6 C	+0.88 C
1922	4.7 C	+0.02 C
1923	4.0 C	-0.72 C
1924	4.6 C	-0.13 C
1925	4.2 C	-0.52 C
1926	3.6 C	-1.13 C
1927	5.5 C	+0.76 C
1928	4.5 C	-0.21 C
1929	4.0 C	-0.72 C
1930	5.2 C	+0.47 C
1931	6.5 C	+1.77 C
1932	4.9 C	+0.21 C
1936	4.2 C	-0.53 C
1937	6.1 C	+1.42 C
1938	5.3 C	+0.58 C
1939	4.4 C	-0.35 C
1940	3.6 C	-1.14 C
1941	4.6 C	-0.07 C
1942	4.6 C	-0.15 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1918 to 1964

Yearly extremes at Donnacona: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	36.7 C (98.1 F)	1921	32.2 C (90.0 F)	32
Coldest night (TNn)	-38.9 C (-38.0 F)	1934	-31.7 C (-25.1 F)	32
Wettest day (Rx1day)	121.9 mm (4.8 in)	1935	50.3 mm (2.0 in)	47
Wettest five days (Rx5day)	185.4 mm (7.3 in)	1949	75.7 mm (3.0 in)	47
Longest dry spell (CDD)	24 days	1956	14 days	47

Hottest day (TXx)

The hottest day of the year at Donnacona, 1918 to 1964. The record is 36.7 C (98.1 F) in 1921, marked on the chart; the median year is 32.2 C (90.0 F).

Hottest day (TXx) at Donnacona by year
Year	Hottest day (TXx)
1918	33.3 C (91.9 F)
1919	35.6 C (96.1 F)
1920	31.7 C (89.1 F)
1921	36.7 C (98.1 F)
1922	31.7 C (89.1 F)
1923	31.7 C (89.1 F)
1924	31.1 C (88.0 F)
1925	32.8 C (91.0 F)
1926	32.2 C (90.0 F)
1927	31.7 C (89.1 F)
1928	36.7 C (98.1 F)
1929	32.2 C (90.0 F)
1930	32.2 C (90.0 F)
1931	33.3 C (91.9 F)
1932	31.1 C (88.0 F)
1933	31.1 C (88.0 F)
1934	30.0 C (86.0 F)
1935	36.7 C (98.1 F)
1936	31.1 C (88.0 F)
1937	33.3 C (91.9 F)
1938	34.4 C (93.9 F)
1939	33.3 C (91.9 F)
1940	31.1 C (88.0 F)
1941	32.2 C (90.0 F)
1942	32.2 C (90.0 F)
1943	31.7 C (89.1 F)
1944	33.3 C (91.9 F)
1945	33.3 C (91.9 F)
1946	31.7 C (89.1 F)
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	31.1 C (88.0 F)
1963	34.4 C (93.9 F)
1964	31.7 C (89.1 F)

Coldest night (TNn)

The coldest night of the year at Donnacona, 1918 to 1964. The record is -38.9 C (-38.0 F) in 1934, marked on the chart; the median year is -31.7 C (-25.1 F).

Coldest night (TNn) at Donnacona by year
Year	Coldest night (TNn)
1918	-21.7 C (-7.1 F)
1919	-34.4 C (-29.9 F)
1920	-36.1 C (-33.0 F)
1921	-28.3 C (-18.9 F)
1922	-31.1 C (-24.0 F)
1923	-32.8 C (-27.0 F)
1924	-33.3 C (-27.9 F)
1925	-34.4 C (-29.9 F)
1926	-27.2 C (-17.0 F)
1927	-28.3 C (-18.9 F)
1928	-31.1 C (-24.0 F)
1929	-33.9 C (-29.0 F)
1930	-34.4 C (-29.9 F)
1931	-28.9 C (-20.0 F)
1932	-29.4 C (-20.9 F)
1933	-36.7 C (-34.1 F)
1934	-38.9 C (-38.0 F)
1935	-35.0 C (-31.0 F)
1936	-31.1 C (-24.0 F)
1937	-27.2 C (-17.0 F)
1938	-34.4 C (-29.9 F)
1939	-33.3 C (-27.9 F)
1940	-29.4 C (-20.9 F)
1941	-30.0 C (-22.0 F)
1942	-31.7 C (-25.1 F)
1943	-31.7 C (-25.1 F)
1944	-31.7 C (-25.1 F)
1945	-36.1 C (-33.0 F)
1946	-27.2 C (-17.0 F)
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	-20.6 C (-5.1 F)
1963	-30.0 C (-22.0 F)
1964	-31.7 C (-25.1 F)

Wettest day (Rx1day)

The wettest day of the year at Donnacona, 1918 to 1964. The record is 121.9 mm (4.8 in) in 1935, marked on the chart; the median year is 50.3 mm (2.0 in).

Wettest day (Rx1day) at Donnacona by year
Year	Wettest day (Rx1day)
1918	71.9 mm (2.8 in)
1919	47.2 mm (1.9 in)
1920	75.2 mm (3.0 in)
1921	30.5 mm (1.2 in)
1922	64.8 mm (2.6 in)
1923	93.5 mm (3.7 in)
1924	50.8 mm (2.0 in)
1925	42.2 mm (1.7 in)
1926	32.5 mm (1.3 in)
1927	53.3 mm (2.1 in)
1928	38.1 mm (1.5 in)
1929	35.6 mm (1.4 in)
1930	36.1 mm (1.4 in)
1931	39.9 mm (1.6 in)
1932	67.1 mm (2.6 in)
1933	65.3 mm (2.6 in)
1934	30.5 mm (1.2 in)
1935	121.9 mm (4.8 in)
1936	36.3 mm (1.4 in)
1937	54.6 mm (2.1 in)
1938	91.7 mm (3.6 in)
1939	32.3 mm (1.3 in)
1940	62.5 mm (2.5 in)
1941	31.0 mm (1.2 in)
1942	50.8 mm (2.0 in)
1943	57.7 mm (2.3 in)
1944	48.0 mm (1.9 in)
1945	87.4 mm (3.4 in)
1946	52.1 mm (2.1 in)
1947	45.7 mm (1.8 in)
1948	58.4 mm (2.3 in)
1949	102.6 mm (4.0 in)
1950	54.4 mm (2.1 in)
1951	87.4 mm (3.4 in)
1952	41.7 mm (1.6 in)
1953	25.4 mm (1.0 in)
1954	68.6 mm (2.7 in)
1955	50.3 mm (2.0 in)
1956	45.7 mm (1.8 in)
1957	49.3 mm (1.9 in)
1958	45.7 mm (1.8 in)
1959	48.3 mm (1.9 in)
1960	58.4 mm (2.3 in)
1961	39.6 mm (1.6 in)
1962	33.0 mm (1.3 in)
1963	60.7 mm (2.4 in)
1964	31.8 mm (1.3 in)

Wettest five days (Rx5day)

The wettest five days of the year at Donnacona, 1918 to 1964. The record is 185.4 mm (7.3 in) in 1949, marked on the chart; the median year is 75.7 mm (3.0 in).

Wettest five days (Rx5day) at Donnacona by year
Year	Wettest five days (Rx5day)
1918	111.3 mm (4.4 in)
1919	65.2 mm (2.6 in)
1920	106.9 mm (4.2 in)
1921	53.5 mm (2.1 in)
1922	116.1 mm (4.6 in)
1923	98.1 mm (3.9 in)
1924	92.2 mm (3.6 in)
1925	63.3 mm (2.5 in)
1926	61.0 mm (2.4 in)
1927	71.1 mm (2.8 in)
1928	94.5 mm (3.7 in)
1929	50.5 mm (2.0 in)
1930	74.7 mm (2.9 in)
1931	94.1 mm (3.7 in)
1932	86.1 mm (3.4 in)
1933	113.3 mm (4.5 in)
1934	74.7 mm (2.9 in)
1935	121.9 mm (4.8 in)
1936	62.5 mm (2.5 in)
1937	116.9 mm (4.6 in)
1938	115.6 mm (4.6 in)
1939	63.5 mm (2.5 in)
1940	64.8 mm (2.6 in)
1941	43.0 mm (1.7 in)
1942	71.6 mm (2.8 in)
1943	181.4 mm (7.1 in)
1944	69.6 mm (2.7 in)
1945	129.7 mm (5.1 in)
1946	52.6 mm (2.1 in)
1947	79.4 mm (3.1 in)
1948	76.5 mm (3.0 in)
1949	185.4 mm (7.3 in)
1950	146.8 mm (5.8 in)
1951	105.6 mm (4.2 in)
1952	70.7 mm (2.8 in)
1953	43.9 mm (1.7 in)
1954	175.3 mm (6.9 in)
1955	68.3 mm (2.7 in)
1956	68.4 mm (2.7 in)
1957	82.7 mm (3.3 in)
1958	75.7 mm (3.0 in)
1959	95.8 mm (3.8 in)
1960	81.3 mm (3.2 in)
1961	53.6 mm (2.1 in)
1962	67.9 mm (2.7 in)
1963	66.0 mm (2.6 in)
1964	50.6 mm (2.0 in)

Longest dry spell (CDD)

The longest dry spell of the year at Donnacona, 1918 to 1964. The record is 24 days in 1956, marked on the chart; the median year is 14 days.

Longest dry spell (CDD) at Donnacona by year
Year	Longest dry spell (CDD)
1918	8 days
1919	11 days
1920	10 days
1921	16 days
1922	23 days
1923	9 days
1924	13 days
1925	18 days
1926	14 days
1927	21 days
1928	12 days
1929	13 days
1930	8 days
1931	12 days
1932	16 days
1933	14 days
1934	8 days
1935	13 days
1936	8 days
1937	17 days
1938	14 days
1939	22 days
1940	12 days
1941	17 days
1942	13 days
1943	11 days
1944	16 days
1945	15 days
1946	14 days
1947	20 days
1948	10 days
1949	16 days
1950	17 days
1951	15 days
1952	18 days
1953	18 days
1954	14 days
1955	17 days
1956	24 days
1957	16 days
1958	21 days
1959	12 days
1960	15 days
1961	11 days
1962	17 days
1963	12 days
1964	5 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

21 years with a frost

Across 21 years with a frost, the median last spring frost at Donnacona falls on 13 May and the median first autumn frost on 29 September, which leaves a median of 139 days between them.

Frost dates and growing season at Donnacona
Measure	Median, all years	Earliest period	Recent period (1919 to 1942)	Recent against earliest	Fitted trend
Last spring frost	13 May	n/a	13 May	n/a	n/a
First autumn frost	29 September	n/a	29 September	n/a	n/a
Growing days	139 days	n/a	139 days	n/a	n/a

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

37 years, 1919 to 1960

A day with at least 49.8 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 139.5 mm (5.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Donnacona: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	49.8 mm (2.0 in)
5 years	68.4 mm (2.7 in)
10 years	82.6 mm (3.3 in)
25 years	103.1 mm (4.1 in)
50 years	120.4 mm (4.7 in)	Longer than the 37 years of record
100 years	139.5 mm (5.5 in)	Longer than the 37 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 37 years of values from 1919 to 1960.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 121.9 mm (4.8 in) in 1935; 102.6 mm (4.0 in) in 1949; 93.5 mm (3.7 in) in 1923.

Download the Data

Data for Donnacona standing records by year: CSV or JSON. Field meanings are on the data page.
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). Records are computed by this site and are not official.

Data as of 2026-10-17. Last revised 17 October 2026 (2026-10-17).