Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Donnacona 2. 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 2, 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
11.0 C (51.8 F)
-37.2 C (-35.0 F)
n/a
n/a
Mar
18.3 C (64.9 F)
-31.0 C (-23.8 F)
n/a
n/a
Apr
23.9 C (75.0 F)
-18.9 C (-2.0 F)
n/a
n/a
May
33.3 C (91.9 F)
-6.7 C (19.9 F)
n/a
n/a
Jun
33.0 C (91.4 F)
0.0 C (32.0 F)
n/a
n/a
Jul
34.4 C (93.9 F)
3.3 C (37.9 F)
n/a
n/a
Aug
31.1 C (88.0 F)
0.6 C (33.1 F)
n/a
n/a
Sep
31.0 C (87.8 F)
-5.0 C (23.0 F)
n/a
n/a
Oct
26.1 C (79.0 F)
-10.6 C (12.9 F)
n/a
n/a
Nov
18.9 C (66.0 F)
-22.2 C (-8.0 F)
n/a
n/a
Dec
12.5 C (54.5 F)
-33.3 C (-27.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Donnacona 2 still stand. 1979 holds the most, with 65.
Standing records at Donnacona 2 by the year they were set
Year set
Standing records
1952
3
1953
57
1954
48
1955
33
1956
59
1957
49
1958
40
1959
55
1960
33
1961
48
1962
38
1963
51
1964
42
1965
46
1966
51
1967
43
1968
48
1969
45
1970
34
1971
35
1972
51
1973
34
1974
44
1975
33
1976
61
1977
50
1978
50
1979
65
1980
47
1981
65
1982
57
1983
49
Wettest Day of Each Month
Sep: 81.3 mm (3.2 in)
The wettest day on record for each calendar month at Donnacona 2. The most was 81.3 mm (3.2 in) on 14 September 1979.
Record daily precipitation for each month at Donnacona 2
Month
Record daily precipitation (mm)
Date
Jan
41.7 mm (1.6 in)
26 January 1976
Feb
40.9 mm (1.6 in)
2 February 1973
Mar
44.0 mm (1.7 in)
19 March 1983
Apr
41.9 mm (1.6 in)
24 April 1968
May
52.0 mm (2.0 in)
11 May 1981
Jun
52.0 mm (2.0 in)
22 June 1981
Jul
67.3 mm (2.6 in)
29 July 1963
Aug
59.2 mm (2.3 in)
7 August 1972
Sep
81.3 mm (3.2 in)
14 September 1979
Oct
50.5 mm (2.0 in)
5 October 1973
Nov
43.2 mm (1.7 in)
17 November 1978
Dec
59.7 mm (2.4 in)
17 December 1954
Period of Record Coverage
1952 to 1983
Complete yearUnder 90 percent of days
32 years of record at Donnacona 2, 1952 to 1983. 1 years have data for under 90 percent of days and are left out of rankings: 1952.
Cooler than the station meanWarmer than the station mean
One stripe for each of 25 complete years at Donnacona 2, 1953 to 1983. Blue stripes are years cooler than the station's own mean of 4.4 C (39.9 F); red stripes are warmer. The coolest year was 1976, at 3.3 C (37.9 F), and the warmest was 1953, at 5.7 C (42.3 F). The strongest colour marks a difference of 1.4 C (2.5 F).
Annual mean temperature at Donnacona 2 as warming stripes, 1953 to 1983
Year
Annual mean temperature
Difference from the station mean
1953
5.7 C
+1.33 C
1954
4.2 C
-0.18 C
1955
4.2 C
-0.20 C
1956
3.5 C
-0.88 C
1957
4.2 C
-0.14 C
1958
3.7 C
-0.67 C
1959
4.2 C
-0.23 C
1960
4.7 C
+0.29 C
1961
4.5 C
+0.11 C
1962
3.7 C
-0.70 C
1963
3.6 C
-0.79 C
1964
4.5 C
+0.15 C
1965
3.9 C
-0.47 C
1966
5.1 C
+0.69 C
1967
4.0 C
-0.35 C
1968
4.3 C
-0.12 C
1969
5.4 C
+0.98 C
1976
3.3 C
-1.10 C
1977
4.8 C
+0.38 C
1978
4.0 C
-0.41 C
1979
5.3 C
+0.88 C
1980
3.9 C
-0.46 C
1981
5.5 C
+1.07 C
1982
4.2 C
-0.23 C
1983
5.4 C
+1.06 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
1952 to 1983
Yearly extremes at Donnacona 2: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
34.4 C (93.9 F)
1953
31.1 C (88.0 F)
32
Coldest night (TNn)
-37.8 C (-36.0 F)
1971
-33.1 C (-27.7 F)
32
Wettest day (Rx1day)
81.3 mm (3.2 in)
1979
44.5 mm (1.8 in)
32
Wettest five days (Rx5day)
97.0 mm (3.8 in)
1979
69.4 mm (2.7 in)
31
Longest dry spell (CDD)
30 days
1980
14 days
32
Hottest day (TXx)
The hottest day of the year at Donnacona 2, 1952 to 1983. The record is 34.4 C (93.9 F) in 1953, marked on the chart; the median year is 31.1 C (88.0 F).
Hottest day (TXx) at Donnacona 2 by year
Year
Hottest day (TXx)
1952
4.4 C (39.9 F)
1953
34.4 C (93.9 F)
1954
28.9 C (84.0 F)
1955
34.4 C (93.9 F)
1956
31.1 C (88.0 F)
1957
30.0 C (86.0 F)
1958
29.4 C (84.9 F)
1959
33.9 C (93.0 F)
1960
31.1 C (88.0 F)
1961
31.1 C (88.0 F)
1962
30.0 C (86.0 F)
1963
32.8 C (91.0 F)
1964
31.1 C (88.0 F)
1965
30.6 C (87.1 F)
1966
31.1 C (88.0 F)
1967
31.7 C (89.1 F)
1968
33.9 C (93.0 F)
1969
31.1 C (88.0 F)
1970
31.1 C (88.0 F)
1971
30.0 C (86.0 F)
1972
30.0 C (86.0 F)
1973
32.2 C (90.0 F)
1974
30.0 C (86.0 F)
1975
32.2 C (90.0 F)
1976
30.6 C (87.1 F)
1977
32.2 C (90.0 F)
1978
33.3 C (91.9 F)
1979
31.7 C (89.1 F)
1980
30.0 C (86.0 F)
1981
33.0 C (91.4 F)
1982
32.0 C (89.6 F)
1983
33.5 C (92.3 F)
Coldest night (TNn)
The coldest night of the year at Donnacona 2, 1952 to 1983. The record is -37.8 C (-36.0 F) in 1971, marked on the chart; the median year is -33.1 C (-27.7 F).
Coldest night (TNn) at Donnacona 2 by year
Year
Coldest night (TNn)
1952
-28.9 C (-20.0 F)
1953
-26.7 C (-16.1 F)
1954
-33.9 C (-29.0 F)
1955
-35.0 C (-31.0 F)
1956
-30.0 C (-22.0 F)
1957
-37.2 C (-35.0 F)
1958
-33.3 C (-27.9 F)
1959
-36.1 C (-33.0 F)
1960
-36.1 C (-33.0 F)
1961
-33.3 C (-27.9 F)
1962
-37.2 C (-35.0 F)
1963
-32.2 C (-26.0 F)
1964
-31.7 C (-25.1 F)
1965
-31.1 C (-24.0 F)
1966
-32.2 C (-26.0 F)
1967
-35.0 C (-31.0 F)
1968
-31.7 C (-25.1 F)
1969
-26.7 C (-16.1 F)
1970
-31.1 C (-24.0 F)
1971
-37.8 C (-36.0 F)
1972
-36.7 C (-34.1 F)
1973
-33.9 C (-29.0 F)
1974
-34.4 C (-29.9 F)
1975
-32.2 C (-26.0 F)
1976
-34.4 C (-29.9 F)
1977
-30.6 C (-23.1 F)
1978
-27.2 C (-17.0 F)
1979
-35.0 C (-31.0 F)
1980
-32.5 C (-26.5 F)
1981
-34.5 C (-30.1 F)
1982
-33.0 C (-27.4 F)
1983
-28.5 C (-19.3 F)
Wettest day (Rx1day)
The wettest day of the year at Donnacona 2, 1952 to 1983. The record is 81.3 mm (3.2 in) in 1979, marked on the chart; the median year is 44.5 mm (1.8 in).
Wettest day (Rx1day) at Donnacona 2 by year
Year
Wettest day (Rx1day)
1952
20.3 mm (0.8 in)
1953
31.8 mm (1.3 in)
1954
59.7 mm (2.4 in)
1955
50.8 mm (2.0 in)
1956
30.5 mm (1.2 in)
1957
52.1 mm (2.1 in)
1958
42.2 mm (1.7 in)
1959
52.8 mm (2.1 in)
1960
66.3 mm (2.6 in)
1961
44.5 mm (1.8 in)
1962
40.6 mm (1.6 in)
1963
67.3 mm (2.6 in)
1964
47.0 mm (1.9 in)
1965
37.1 mm (1.5 in)
1966
48.3 mm (1.9 in)
1967
39.9 mm (1.6 in)
1968
41.9 mm (1.6 in)
1969
37.1 mm (1.5 in)
1970
38.9 mm (1.5 in)
1971
41.7 mm (1.6 in)
1972
59.2 mm (2.3 in)
1973
50.5 mm (2.0 in)
1974
46.0 mm (1.8 in)
1975
44.7 mm (1.8 in)
1976
44.5 mm (1.8 in)
1977
43.9 mm (1.7 in)
1978
51.1 mm (2.0 in)
1979
81.3 mm (3.2 in)
1980
41.7 mm (1.6 in)
1981
52.0 mm (2.0 in)
1982
42.6 mm (1.7 in)
1983
44.0 mm (1.7 in)
Wettest five days (Rx5day)
The wettest five days of the year at Donnacona 2, 1952 to 1983. The record is 97.0 mm (3.8 in) in 1979, marked on the chart; the median year is 69.4 mm (2.7 in).
Wettest five days (Rx5day) at Donnacona 2 by year
Year
Wettest five days (Rx5day)
1952
n/a
1953
60.4 mm (2.4 in)
1954
78.7 mm (3.1 in)
1955
67.5 mm (2.7 in)
1956
58.4 mm (2.3 in)
1957
83.9 mm (3.3 in)
1958
88.7 mm (3.5 in)
1959
76.2 mm (3.0 in)
1960
95.3 mm (3.8 in)
1961
58.7 mm (2.3 in)
1962
70.2 mm (2.8 in)
1963
68.3 mm (2.7 in)
1964
59.0 mm (2.3 in)
1965
79.6 mm (3.1 in)
1966
57.7 mm (2.3 in)
1967
69.4 mm (2.7 in)
1968
47.7 mm (1.9 in)
1969
55.8 mm (2.2 in)
1970
63.6 mm (2.5 in)
1971
54.4 mm (2.1 in)
1972
80.5 mm (3.2 in)
1973
72.4 mm (2.9 in)
1974
76.0 mm (3.0 in)
1975
62.0 mm (2.4 in)
1976
65.6 mm (2.6 in)
1977
80.2 mm (3.2 in)
1978
64.8 mm (2.6 in)
1979
97.0 mm (3.8 in)
1980
71.0 mm (2.8 in)
1981
90.3 mm (3.6 in)
1982
70.2 mm (2.8 in)
1983
65.8 mm (2.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Donnacona 2, 1952 to 1983. The record is 30 days in 1980, marked on the chart; the median year is 14 days.
Longest dry spell (CDD) at Donnacona 2 by year
Year
Longest dry spell (CDD)
1952
1 day
1953
18 days
1954
14 days
1955
15 days
1956
14 days
1957
17 days
1958
22 days
1959
12 days
1960
14 days
1961
25 days
1962
16 days
1963
13 days
1964
14 days
1965
20 days
1966
11 days
1967
15 days
1968
11 days
1969
13 days
1970
21 days
1971
12 days
1972
13 days
1973
10 days
1974
13 days
1975
13 days
1976
14 days
1977
12 days
1978
20 days
1979
18 days
1980
30 days
1981
14 days
1982
11 days
1983
16 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
25 years with a frost
Across 25 years with a frost, the median last spring frost at Donnacona 2 falls on 14 May and the median first autumn frost on 25 September, which leaves a median of 133 days between them.
Fitted over all years, the growing season changes by +1.2 days per decade at this station.
Frost dates and growing season at Donnacona 2
Measure
Median, all years
Earliest period
Recent period (1953 to 1983)
Recent against earliest
Fitted trend
Last spring frost
14 May
n/a
14 May
n/a
-0.4 days per decade
First autumn frost
25 September
n/a
25 September
n/a
+0.8 days per decade
Growing days
133 days
n/a
133 days
n/a
+1.2 days per decade
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.
Download the Data
Data for Donnacona 2 standing records by year: CSV or JSON. Field meanings are on the data page.
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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.