Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Oka. 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 Oka, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
10.6 C (51.1 F)
-38.3 C (-36.9 F)
n/a
n/a
Feb
14.0 C (57.2 F)
-38.3 C (-36.9 F)
n/a
n/a
Mar
25.6 C (78.1 F)
-29.4 C (-20.9 F)
n/a
n/a
Apr
28.9 C (84.0 F)
-16.1 C (3.0 F)
n/a
n/a
May
32.8 C (91.0 F)
-6.1 C (21.0 F)
n/a
n/a
Jun
35.0 C (95.0 F)
0.0 C (32.0 F)
n/a
n/a
Jul
36.1 C (97.0 F)
2.2 C (36.0 F)
n/a
n/a
Aug
35.6 C (96.1 F)
-0.6 C (30.9 F)
n/a
n/a
Sep
32.2 C (90.0 F)
-5.0 C (23.0 F)
n/a
n/a
Oct
27.8 C (82.0 F)
-10.0 C (14.0 F)
n/a
n/a
Nov
23.9 C (75.0 F)
-22.8 C (-9.0 F)
n/a
n/a
Dec
16.0 C (60.8 F)
-34.4 C (-29.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Oka still stand. 1979 holds the most, with 58.
Standing records at Oka by the year they were set
Year set
Standing records
1937
9
1938
21
1939
28
1940
26
1941
33
1942
37
1943
26
1944
40
1945
52
1946
41
1947
52
1948
38
1949
27
1952
13
1953
39
1954
19
1955
24
1956
29
1957
35
1958
17
1959
35
1960
9
1961
15
1962
25
1963
30
1964
43
1965
40
1966
27
1967
33
1968
36
1969
31
1970
35
1971
35
1972
26
1973
33
1974
40
1975
23
1976
55
1977
36
1978
37
1979
58
1980
32
1981
47
1982
50
1983
27
All-Time Record Progression
3 new records
3 all-time records were set at Oka between 3 February 1971 and 3 January 1981. Each dot is a new record.
When Oka set new all-time records
Date
Kind
Detail
1971-02-03
Record low minimum temperature
Record low minimum temperature -38.3 C (-36.9 F)
1976-01-23
Record low maximum temperature
Record low maximum temperature -25.6 C (-14.1 F)
1981-01-03
Record low maximum temperature
Record low maximum temperature -29.0 C (-20.2 F)
Wettest Day of Each Month
Aug: 78.2 mm (3.1 in)
The wettest day on record for each calendar month at Oka. The most was 78.2 mm (3.1 in) on 31 August 1954.
Record daily precipitation for each month at Oka
Month
Record daily precipitation (mm)
Date
Jan
54.6 mm (2.1 in)
23 January 1966
Feb
41.9 mm (1.6 in)
11 February 1956
Mar
42.2 mm (1.7 in)
22 March 1972
Apr
38.1 mm (1.5 in)
6 April 1949
May
47.5 mm (1.9 in)
3 May 1954
Jun
53.6 mm (2.1 in)
15 June 1943
Jul
60.5 mm (2.4 in)
1 July 1956
Aug
78.2 mm (3.1 in)
31 August 1954
Sep
77.5 mm (3.1 in)
14 September 1979
Oct
72.9 mm (2.9 in)
5 October 1979
Nov
53.8 mm (2.1 in)
14 November 1937
Dec
45.7 mm (1.8 in)
24 December 1966
Period of Record Coverage
1937 to 1983
Complete yearUnder 90 percent of days
45 years of record at Oka, 1937 to 1983. 4 years have data for under 90 percent of days and are left out of rankings: 1937, 1938, 1949, 1952.
Cooler than the station meanWarmer than the station mean
One stripe for each of 39 complete years at Oka, 1939 to 1983. Blue stripes are years cooler than the station's own mean of 5.6 C (42.1 F); red stripes are warmer. The coolest year was 1976, at 4.1 C (39.3 F), and the warmest was 1953, at 7.4 C (45.3 F). The strongest colour marks a difference of 1.9 C (3.4 F).
Annual mean temperature at Oka as warming stripes, 1939 to 1983
Year
Annual mean temperature
Difference from the station mean
1939
5.5 C
-0.11 C
1940
5.1 C
-0.52 C
1941
6.3 C
+0.65 C
1942
6.5 C
+0.92 C
1943
4.9 C
-0.67 C
1944
6.2 C
+0.58 C
1945
6.3 C
+0.66 C
1946
6.7 C
+1.10 C
1947
6.1 C
+0.46 C
1948
6.6 C
+0.95 C
1953
7.4 C
+1.80 C
1954
5.2 C
-0.39 C
1955
6.0 C
+0.40 C
1956
5.2 C
-0.45 C
1957
6.4 C
+0.81 C
1958
5.0 C
-0.64 C
1959
6.0 C
+0.39 C
1960
6.2 C
+0.54 C
1961
6.0 C
+0.42 C
1962
5.3 C
-0.29 C
1963
5.2 C
-0.39 C
1964
6.2 C
+0.57 C
1965
5.6 C
+0.00 C
1966
6.1 C
+0.47 C
1967
5.6 C
-0.01 C
1968
5.4 C
-0.25 C
1969
5.3 C
-0.31 C
1970
4.8 C
-0.78 C
1971
4.7 C
-0.88 C
1973
6.1 C
+0.45 C
1974
4.6 C
-1.01 C
1975
5.3 C
-0.28 C
1976
4.1 C
-1.53 C
1977
5.5 C
-0.12 C
1978
4.4 C
-1.19 C
1979
5.7 C
+0.07 C
1980
4.6 C
-0.97 C
1982
4.8 C
-0.82 C
1983
5.9 C
+0.26 C
The annual mean temperature here has fallen by 0.3 C (0.1 to 0.4) per decade over 1939 to 1983. In Fahrenheit: 0.5 F (0.2 to 0.8) per decade. The slope is a straight line fitted to 39 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Oka
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.3 C (-0.4 to -0.1) per decade
-0.5 F (-0.8 to -0.2) per decade
1939 to 1983
39
Fall
Mean daily maximum
-0.14 C (-0.30 to 0.02) per decade
-0.26 F (-0.55 to 0.03) per decade
1939 to 1983
39
Not clearly different from zero
Mean daily minimum
-0.4 C (-0.6 to -0.2) per decade
-0.7 F (-1.0 to -0.4) per decade
1939 to 1983
39
Fall
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
1937 to 1983
Yearly extremes at Oka: 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)
1953
32.8 C (91.0 F)
45
Coldest night (TNn)
-38.3 C (-36.9 F)
1971
-29.4 C (-20.9 F)
45
Wettest day (Rx1day)
78.2 mm (3.1 in)
1954
41.7 mm (1.6 in)
45
Wettest five days (Rx5day)
125.2 mm (4.9 in)
1972
70.2 mm (2.8 in)
45
Longest dry spell (CDD)
40 days
1961
13 days
45
Hottest day (TXx)
The hottest day of the year at Oka, 1937 to 1983. The record is 36.1 C (97.0 F) in 1953, marked on the chart; the median year is 32.8 C (91.0 F).
Hottest day (TXx) at Oka by year
Year
Hottest day (TXx)
1937
31.1 C (88.0 F)
1938
33.9 C (93.0 F)
1939
32.2 C (90.0 F)
1940
31.1 C (88.0 F)
1941
35.0 C (95.0 F)
1942
32.8 C (91.0 F)
1943
32.2 C (90.0 F)
1944
35.6 C (96.1 F)
1945
32.2 C (90.0 F)
1946
33.3 C (91.9 F)
1947
33.9 C (93.0 F)
1948
35.0 C (95.0 F)
1949
34.4 C (93.9 F)
1952
33.9 C (93.0 F)
1953
36.1 C (97.0 F)
1954
30.0 C (86.0 F)
1955
35.0 C (95.0 F)
1956
31.7 C (89.1 F)
1957
33.9 C (93.0 F)
1958
28.9 C (84.0 F)
1959
33.9 C (93.0 F)
1960
31.7 C (89.1 F)
1961
30.6 C (87.1 F)
1962
32.8 C (91.0 F)
1963
33.3 C (91.9 F)
1964
33.9 C (93.0 F)
1965
32.8 C (91.0 F)
1966
35.0 C (95.0 F)
1967
31.1 C (88.0 F)
1968
31.7 C (89.1 F)
1969
32.8 C (91.0 F)
1970
32.8 C (91.0 F)
1971
33.3 C (91.9 F)
1972
30.6 C (87.1 F)
1973
31.1 C (88.0 F)
1974
30.0 C (86.0 F)
1975
34.4 C (93.9 F)
1976
30.6 C (87.1 F)
1977
32.2 C (90.0 F)
1978
32.2 C (90.0 F)
1979
32.2 C (90.0 F)
1980
32.0 C (89.6 F)
1981
30.5 C (86.9 F)
1982
33.0 C (91.4 F)
1983
32.5 C (90.5 F)
Coldest night (TNn)
The coldest night of the year at Oka, 1937 to 1983. The record is -38.3 C (-36.9 F) in 1971, marked on the chart; the median year is -29.4 C (-20.9 F).
Coldest night (TNn) at Oka by year
Year
Coldest night (TNn)
1937
-8.9 C (16.0 F)
1938
-21.1 C (-6.0 F)
1939
-27.2 C (-17.0 F)
1940
-27.2 C (-17.0 F)
1941
-26.7 C (-16.1 F)
1942
-34.4 C (-29.9 F)
1943
-35.0 C (-31.0 F)
1944
-26.7 C (-16.1 F)
1945
-29.4 C (-20.9 F)
1946
-30.6 C (-23.1 F)
1947
-27.2 C (-17.0 F)
1948
-29.4 C (-20.9 F)
1949
-23.3 C (-9.9 F)
1952
-22.2 C (-8.0 F)
1953
-23.9 C (-11.0 F)
1954
-27.8 C (-18.0 F)
1955
-30.0 C (-22.0 F)
1956
-22.8 C (-9.0 F)
1957
-34.4 C (-29.9 F)
1958
-26.1 C (-15.0 F)
1959
-28.3 C (-18.9 F)
1960
-27.8 C (-18.0 F)
1961
-26.7 C (-16.1 F)
1962
-31.1 C (-24.0 F)
1963
-31.7 C (-25.1 F)
1964
-25.6 C (-14.1 F)
1965
-30.0 C (-22.0 F)
1966
-27.8 C (-18.0 F)
1967
-31.1 C (-24.0 F)
1968
-31.1 C (-24.0 F)
1969
-29.4 C (-20.9 F)
1970
-33.9 C (-29.0 F)
1971
-38.3 C (-36.9 F)
1972
-37.8 C (-36.0 F)
1973
-36.7 C (-34.1 F)
1974
-29.4 C (-20.9 F)
1975
-32.8 C (-27.0 F)
1976
-38.3 C (-36.9 F)
1977
-27.8 C (-18.0 F)
1978
-33.3 C (-27.9 F)
1979
-35.0 C (-31.0 F)
1980
-33.0 C (-27.4 F)
1981
-36.0 C (-32.8 F)
1982
-35.5 C (-31.9 F)
1983
-34.0 C (-29.2 F)
Wettest day (Rx1day)
The wettest day of the year at Oka, 1937 to 1983. The record is 78.2 mm (3.1 in) in 1954, marked on the chart; the median year is 41.7 mm (1.6 in).
Wettest day (Rx1day) at Oka by year
Year
Wettest day (Rx1day)
1937
53.8 mm (2.1 in)
1938
35.6 mm (1.4 in)
1939
68.6 mm (2.7 in)
1940
45.7 mm (1.8 in)
1941
37.3 mm (1.5 in)
1942
67.3 mm (2.6 in)
1943
53.6 mm (2.1 in)
1944
26.7 mm (1.1 in)
1945
46.2 mm (1.8 in)
1946
33.5 mm (1.3 in)
1947
45.7 mm (1.8 in)
1948
41.7 mm (1.6 in)
1949
50.0 mm (2.0 in)
1952
63.5 mm (2.5 in)
1953
46.2 mm (1.8 in)
1954
78.2 mm (3.1 in)
1955
33.5 mm (1.3 in)
1956
60.5 mm (2.4 in)
1957
41.4 mm (1.6 in)
1958
33.3 mm (1.3 in)
1959
27.9 mm (1.1 in)
1960
57.2 mm (2.3 in)
1961
41.9 mm (1.6 in)
1962
34.3 mm (1.4 in)
1963
70.6 mm (2.8 in)
1964
25.7 mm (1.0 in)
1965
34.8 mm (1.4 in)
1966
54.6 mm (2.1 in)
1967
37.8 mm (1.5 in)
1968
37.6 mm (1.5 in)
1969
35.6 mm (1.4 in)
1970
29.5 mm (1.2 in)
1971
30.2 mm (1.2 in)
1972
50.5 mm (2.0 in)
1973
48.8 mm (1.9 in)
1974
39.9 mm (1.6 in)
1975
55.4 mm (2.2 in)
1976
38.6 mm (1.5 in)
1977
41.1 mm (1.6 in)
1978
45.5 mm (1.8 in)
1979
77.5 mm (3.1 in)
1980
33.6 mm (1.3 in)
1981
40.6 mm (1.6 in)
1982
75.2 mm (3.0 in)
1983
41.6 mm (1.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Oka, 1937 to 1983. The record is 125.2 mm (4.9 in) in 1972, marked on the chart; the median year is 70.2 mm (2.8 in).
Wettest five days (Rx5day) at Oka by year
Year
Wettest five days (Rx5day)
1937
62.4 mm (2.5 in)
1938
59.4 mm (2.3 in)
1939
68.6 mm (2.7 in)
1940
70.3 mm (2.8 in)
1941
74.4 mm (2.9 in)
1942
75.4 mm (3.0 in)
1943
82.5 mm (3.2 in)
1944
55.9 mm (2.2 in)
1945
86.6 mm (3.4 in)
1946
88.7 mm (3.5 in)
1947
74.4 mm (2.9 in)
1948
69.0 mm (2.7 in)
1949
85.3 mm (3.4 in)
1952
74.5 mm (2.9 in)
1953
66.7 mm (2.6 in)
1954
101.8 mm (4.0 in)
1955
54.1 mm (2.1 in)
1956
76.8 mm (3.0 in)
1957
52.7 mm (2.1 in)
1958
71.4 mm (2.8 in)
1959
51.5 mm (2.0 in)
1960
78.4 mm (3.1 in)
1961
67.6 mm (2.7 in)
1962
53.4 mm (2.1 in)
1963
73.8 mm (2.9 in)
1964
43.5 mm (1.7 in)
1965
67.5 mm (2.7 in)
1966
73.1 mm (2.9 in)
1967
53.4 mm (2.1 in)
1968
68.3 mm (2.7 in)
1969
68.7 mm (2.7 in)
1970
51.3 mm (2.0 in)
1971
64.2 mm (2.5 in)
1972
125.2 mm (4.9 in)
1973
60.9 mm (2.4 in)
1974
82.8 mm (3.3 in)
1975
84.2 mm (3.3 in)
1976
57.7 mm (2.3 in)
1977
65.2 mm (2.6 in)
1978
70.2 mm (2.8 in)
1979
105.9 mm (4.2 in)
1980
85.4 mm (3.4 in)
1981
56.8 mm (2.2 in)
1982
88.0 mm (3.5 in)
1983
85.2 mm (3.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Oka, 1937 to 1983. The record is 40 days in 1961, marked on the chart; the median year is 13 days.
Longest dry spell (CDD) at Oka by year
Year
Longest dry spell (CDD)
1937
13 days
1938
13 days
1939
13 days
1940
17 days
1941
19 days
1942
14 days
1943
12 days
1944
9 days
1945
21 days
1946
12 days
1947
17 days
1948
16 days
1949
11 days
1952
9 days
1953
15 days
1954
10 days
1955
17 days
1956
15 days
1957
17 days
1958
10 days
1959
11 days
1960
13 days
1961
40 days
1962
18 days
1963
19 days
1964
15 days
1965
23 days
1966
12 days
1967
17 days
1968
18 days
1969
13 days
1970
18 days
1971
11 days
1972
11 days
1973
10 days
1974
12 days
1975
17 days
1976
10 days
1977
26 days
1978
12 days
1979
12 days
1980
30 days
1981
22 days
1982
11 days
1983
11 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
39 years with a frost
Across 39 years with a frost, the median last spring frost at Oka falls on 14 May and the median first autumn frost on 29 September, which leaves a median of 137 days between them.
Fitted over all years, the growing season changes by -7.4 days per decade at this station.
Frost dates and growing season at Oka
Measure
Median, all years
Earliest period
Recent period (1948 to 1983)
Recent against earliest
Fitted trend
Last spring frost
14 May
n/a
17 May
n/a
+2.9 days per decade
First autumn frost
29 September
n/a
30 September
n/a
-4.5 days per decade
Growing days
137 days
n/a
135 days
n/a
-7.4 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.
Rainfall Return Levels
34 years, 1945 to 1983
A day with at least 41.8 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 98.0 mm (3.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Oka: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
41.8 mm (1.6 in)
5 years
54.1 mm (2.1 in)
10 years
63.2 mm (2.5 in)
25 years
76.1 mm (3.0 in)
50 years
86.6 mm (3.4 in)
Longer than the 34 years of record
100 years
98.0 mm (3.9 in)
Longer than the 34 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, 34 years of values from 1945 to 1983.
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: 78.2 mm (3.1 in) in 1954; 77.5 mm (3.1 in) in 1979; 75.2 mm (3.0 in) in 1982.
Download the Data
Data for Oka standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Oka 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.