Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Valleyfield. 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 Valleyfield, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
11.7 C (53.1 F)
-38.3 C (-36.9 F)
n/a
n/a
Feb
16.0 C (60.8 F)
-32.2 C (-26.0 F)
n/a
n/a
Mar
21.1 C (70.0 F)
-24.0 C (-11.2 F)
n/a
n/a
Apr
30.0 C (86.0 F)
-15.6 C (3.9 F)
n/a
n/a
May
33.3 C (91.9 F)
-4.4 C (24.1 F)
n/a
n/a
Jun
34.4 C (93.9 F)
2.2 C (36.0 F)
n/a
n/a
Jul
35.6 C (96.1 F)
7.0 C (44.6 F)
n/a
n/a
Aug
36.1 C (97.0 F)
1.7 C (35.1 F)
n/a
n/a
Sep
35.0 C (95.0 F)
-1.0 C (30.2 F)
n/a
n/a
Oct
28.9 C (84.0 F)
-8.9 C (16.0 F)
n/a
n/a
Nov
22.2 C (72.0 F)
-21.0 C (-5.8 F)
n/a
n/a
Dec
17.0 C (62.6 F)
-32.0 C (-25.6 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Valleyfield still stand. 1957 holds the most, with 67.
Standing records at Valleyfield by the year they were set
Year set
Standing records
1952
32
1953
62
1954
46
1955
55
1956
55
1957
67
1958
38
1959
67
1960
28
1961
33
1962
31
1963
38
1964
41
1965
44
1966
51
1967
49
1968
46
1969
30
1970
57
1971
27
1972
47
1973
43
1974
40
1975
45
1976
59
1977
40
1978
32
1979
58
1980
48
1981
64
1982
53
1983
38
All-Time Record Progression
1 new records
1 all-time records were set at Valleyfield between 25 August 1982 and 25 August 1982. Each dot is a new record.
When Valleyfield set new all-time records
Date
Kind
Detail
1982-08-25
Record daily precipitation
Record daily precipitation 80.0 mm (3.1 in)
Wettest Day of Each Month
Aug: 80.0 mm (3.1 in)
The wettest day on record for each calendar month at Valleyfield. The most was 80.0 mm (3.1 in) on 25 August 1982.
Record daily precipitation for each month at Valleyfield
Month
Record daily precipitation (mm)
Date
Jan
43.4 mm (1.7 in)
15 January 1962
Feb
40.6 mm (1.6 in)
21 February 1954
Mar
44.5 mm (1.8 in)
4 March 1952
Apr
36.8 mm (1.4 in)
13 April 1961
May
44.5 mm (1.8 in)
3 May 1954
Jun
41.1 mm (1.6 in)
24 June 1952
Jul
53.3 mm (2.1 in)
27 July 1975
Aug
80.0 mm (3.1 in)
25 August 1982
Sep
72.9 mm (2.9 in)
25 September 1975
Oct
52.8 mm (2.1 in)
25 October 1960
Nov
40.6 mm (1.6 in)
20 November 1974
Dec
49.0 mm (1.9 in)
5 December 1952
Period of Record Coverage
1952 to 1983
Complete yearUnder 90 percent of days
32 years of record at Valleyfield, 1952 to 1983. 2 years have data for under 90 percent of days and are left out of rankings: 1963, 1965.
Cooler than the station meanWarmer than the station mean
One stripe for each of 15 complete years at Valleyfield, 1954 to 1981. Blue stripes are years cooler than the station's own mean of 6.6 C (43.9 F); red stripes are warmer. The coolest year was 1956, at 5.9 C (42.5 F), and the warmest was 1973, at 7.9 C (46.3 F). The strongest colour marks a difference of 1.4 C (2.5 F).
Annual mean temperature at Valleyfield as warming stripes, 1954 to 1981
Year
Annual mean temperature
Difference from the station mean
1954
6.0 C
-0.56 C
1955
6.8 C
+0.16 C
1956
5.9 C
-0.75 C
1957
6.7 C
+0.07 C
1958
6.1 C
-0.48 C
1959
7.1 C
+0.47 C
1960
7.0 C
+0.41 C
1966
6.6 C
-0.01 C
1967
6.1 C
-0.49 C
1969
6.7 C
+0.07 C
1970
6.4 C
-0.24 C
1971
6.5 C
-0.09 C
1973
7.9 C
+1.34 C
1980
6.1 C
-0.50 C
1981
7.2 C
+0.57 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 Valleyfield: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
36.1 C (97.0 F)
1975
32.8 C (91.0 F)
32
Coldest night (TNn)
-38.3 C (-36.9 F)
1957
-28.9 C (-20.1 F)
32
Wettest day (Rx1day)
80.0 mm (3.1 in)
1982
41.5 mm (1.6 in)
32
Wettest five days (Rx5day)
108.4 mm (4.3 in)
1960
70.9 mm (2.8 in)
32
Longest dry spell (CDD)
35 days
1961
15 days
32
Hottest day (TXx)
The hottest day of the year at Valleyfield, 1952 to 1983. The record is 36.1 C (97.0 F) in 1975, marked on the chart; the median year is 32.8 C (91.0 F).
Hottest day (TXx) at Valleyfield by year
Year
Hottest day (TXx)
1952
33.3 C (91.9 F)
1953
35.0 C (95.0 F)
1954
30.6 C (87.1 F)
1955
35.6 C (96.1 F)
1956
32.2 C (90.0 F)
1957
33.3 C (91.9 F)
1958
31.1 C (88.0 F)
1959
34.4 C (93.9 F)
1960
32.2 C (90.0 F)
1961
31.7 C (89.1 F)
1962
32.2 C (90.0 F)
1963
32.8 C (91.0 F)
1964
34.4 C (93.9 F)
1965
32.2 C (90.0 F)
1966
33.3 C (91.9 F)
1967
30.6 C (87.1 F)
1968
29.4 C (84.9 F)
1969
32.8 C (91.0 F)
1970
34.4 C (93.9 F)
1971
32.8 C (91.0 F)
1972
31.7 C (89.1 F)
1973
33.3 C (91.9 F)
1974
32.8 C (91.0 F)
1975
36.1 C (97.0 F)
1976
32.2 C (90.0 F)
1977
33.3 C (91.9 F)
1978
33.3 C (91.9 F)
1979
32.8 C (91.0 F)
1980
32.0 C (89.6 F)
1981
34.5 C (94.1 F)
1982
33.0 C (91.4 F)
1983
33.5 C (92.3 F)
Coldest night (TNn)
The coldest night of the year at Valleyfield, 1952 to 1983. The record is -38.3 C (-36.9 F) in 1957, marked on the chart; the median year is -28.9 C (-20.1 F).
Coldest night (TNn) at Valleyfield by year
Year
Coldest night (TNn)
1952
-20.0 C (-4.0 F)
1953
-21.1 C (-6.0 F)
1954
-29.4 C (-20.9 F)
1955
-30.0 C (-22.0 F)
1956
-26.1 C (-15.0 F)
1957
-38.3 C (-36.9 F)
1958
-27.2 C (-17.0 F)
1959
-32.2 C (-26.0 F)
1960
-26.1 C (-15.0 F)
1961
-25.6 C (-14.1 F)
1962
-31.1 C (-24.0 F)
1963
-30.0 C (-22.0 F)
1964
-25.6 C (-14.1 F)
1965
-28.3 C (-18.9 F)
1966
-29.4 C (-20.9 F)
1967
-30.6 C (-23.1 F)
1968
-30.6 C (-23.1 F)
1969
-23.3 C (-9.9 F)
1970
-27.8 C (-18.0 F)
1971
-31.1 C (-24.0 F)
1972
-31.1 C (-24.0 F)
1973
-28.3 C (-18.9 F)
1974
-29.4 C (-20.9 F)
1975
-27.8 C (-18.0 F)
1976
-31.1 C (-24.0 F)
1977
-26.1 C (-15.0 F)
1978
-26.7 C (-16.1 F)
1979
-32.0 C (-25.6 F)
1980
-32.0 C (-25.6 F)
1981
-35.0 C (-31.0 F)
1982
-28.5 C (-19.3 F)
1983
-27.0 C (-16.6 F)
Wettest day (Rx1day)
The wettest day of the year at Valleyfield, 1952 to 1983. The record is 80.0 mm (3.1 in) in 1982, marked on the chart; the median year is 41.5 mm (1.6 in).
Wettest day (Rx1day) at Valleyfield by year
Year
Wettest day (Rx1day)
1952
49.0 mm (1.9 in)
1953
45.7 mm (1.8 in)
1954
45.7 mm (1.8 in)
1955
45.7 mm (1.8 in)
1956
35.6 mm (1.4 in)
1957
33.0 mm (1.3 in)
1958
32.8 mm (1.3 in)
1959
34.8 mm (1.4 in)
1960
52.8 mm (2.1 in)
1961
36.8 mm (1.4 in)
1962
43.4 mm (1.7 in)
1963
57.2 mm (2.3 in)
1964
30.0 mm (1.2 in)
1965
42.4 mm (1.7 in)
1966
45.7 mm (1.8 in)
1967
28.2 mm (1.1 in)
1968
38.1 mm (1.5 in)
1969
35.1 mm (1.4 in)
1970
70.6 mm (2.8 in)
1971
56.6 mm (2.2 in)
1972
36.1 mm (1.4 in)
1973
40.6 mm (1.6 in)
1974
40.6 mm (1.6 in)
1975
72.9 mm (2.9 in)
1976
42.9 mm (1.7 in)
1977
24.9 mm (1.0 in)
1978
31.0 mm (1.2 in)
1979
69.1 mm (2.7 in)
1980
23.6 mm (0.9 in)
1981
43.8 mm (1.7 in)
1982
80.0 mm (3.1 in)
1983
36.8 mm (1.4 in)
Wettest five days (Rx5day)
The wettest five days of the year at Valleyfield, 1952 to 1983. The record is 108.4 mm (4.3 in) in 1960, marked on the chart; the median year is 70.9 mm (2.8 in).
Wettest five days (Rx5day) at Valleyfield by year
Year
Wettest five days (Rx5day)
1952
77.8 mm (3.1 in)
1953
58.5 mm (2.3 in)
1954
98.0 mm (3.9 in)
1955
56.1 mm (2.2 in)
1956
71.2 mm (2.8 in)
1957
42.6 mm (1.7 in)
1958
66.8 mm (2.6 in)
1959
82.5 mm (3.2 in)
1960
108.4 mm (4.3 in)
1961
77.2 mm (3.0 in)
1962
53.6 mm (2.1 in)
1963
91.8 mm (3.6 in)
1964
46.2 mm (1.8 in)
1965
73.2 mm (2.9 in)
1966
63.5 mm (2.5 in)
1967
51.1 mm (2.0 in)
1968
41.4 mm (1.6 in)
1969
54.2 mm (2.1 in)
1970
107.0 mm (4.2 in)
1971
73.1 mm (2.9 in)
1972
66.3 mm (2.6 in)
1973
57.0 mm (2.2 in)
1974
66.3 mm (2.6 in)
1975
106.2 mm (4.2 in)
1976
70.4 mm (2.8 in)
1977
46.5 mm (1.8 in)
1978
75.0 mm (3.0 in)
1979
96.0 mm (3.8 in)
1980
72.2 mm (2.8 in)
1981
70.5 mm (2.8 in)
1982
89.3 mm (3.5 in)
1983
72.3 mm (2.8 in)
Longest dry spell (CDD)
The longest dry spell of the year at Valleyfield, 1952 to 1983. The record is 35 days in 1961, marked on the chart; the median year is 15 days.
Longest dry spell (CDD) at Valleyfield by year
Year
Longest dry spell (CDD)
1952
13 days
1953
25 days
1954
8 days
1955
12 days
1956
15 days
1957
34 days
1958
10 days
1959
14 days
1960
15 days
1961
35 days
1962
24 days
1963
19 days
1964
15 days
1965
16 days
1966
15 days
1967
20 days
1968
18 days
1969
18 days
1970
17 days
1971
24 days
1972
11 days
1973
13 days
1974
9 days
1975
13 days
1976
10 days
1977
25 days
1978
15 days
1979
12 days
1980
30 days
1981
10 days
1982
11 days
1983
10 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.
Download the Data
Data for Valleyfield standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Valleyfield 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.