Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Oak Ridges. 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 Oak Ridges, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
14.4 C (57.9 F)
-31.7 C (-25.1 F)
n/a
n/a
Feb
11.7 C (53.1 F)
-34.4 C (-29.9 F)
n/a
n/a
Mar
26.1 C (79.0 F)
-24.4 C (-11.9 F)
n/a
n/a
Apr
28.3 C (82.9 F)
-20.0 C (-4.0 F)
n/a
n/a
May
32.5 C (90.5 F)
-5.6 C (21.9 F)
n/a
n/a
Jun
35.6 C (96.1 F)
-4.4 C (24.1 F)
n/a
n/a
Jul
40.0 C (104.0 F)
4.4 C (39.9 F)
n/a
n/a
Aug
37.8 C (100.0 F)
1.1 C (34.0 F)
n/a
n/a
Sep
35.6 C (96.1 F)
-2.2 C (28.0 F)
n/a
n/a
Oct
30.0 C (86.0 F)
-9.4 C (15.1 F)
n/a
n/a
Nov
21.1 C (70.0 F)
-20.6 C (-5.1 F)
n/a
n/a
Dec
15.6 C (60.1 F)
-33.9 C (-29.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Oak Ridges still stand. 1923 holds the most, with 49.
Standing records at Oak Ridges by the year they were set
Year set
Standing records
1918
26
1919
33
1920
43
1921
33
1922
27
1923
49
1924
22
1925
48
1926
34
1927
26
1928
19
1929
15
1930
34
1931
28
1932
28
1933
37
1934
29
1935
22
1936
43
1937
15
1938
30
1939
19
1940
25
1941
31
1942
26
1943
18
1944
22
1945
47
1946
31
1947
28
1948
14
1949
19
1950
21
1951
24
1952
14
1953
16
1954
12
1955
7
1956
10
1957
14
1962
33
1963
25
1964
21
1965
28
1966
21
1967
24
1968
22
1969
16
1970
16
1971
8
1972
23
1973
23
1974
26
1975
32
1976
35
1977
28
1978
14
1979
30
All-Time Record Progression
1 new records
1 all-time records were set at Oak Ridges between 15 October 1954 and 15 October 1954. Each dot is a new record.
When Oak Ridges set new all-time records
Date
Kind
Detail
1954-10-15
Record daily precipitation
Record daily precipitation 121.9 mm (4.8 in)
Wettest Day of Each Month
Oct: 121.9 mm (4.8 in)
The wettest day on record for each calendar month at Oak Ridges. The most was 121.9 mm (4.8 in) on 15 October 1954.
Record daily precipitation for each month at Oak Ridges
Month
Record daily precipitation (mm)
Date
Jan
29.2 mm (1.1 in)
30 January 1947
Feb
39.6 mm (1.6 in)
11 February 1932
Mar
38.1 mm (1.5 in)
25 March 1947
Apr
53.8 mm (2.1 in)
13 April 1952
May
58.9 mm (2.3 in)
15 May 1942
Jun
52.3 mm (2.1 in)
18 June 1934
Jul
78.5 mm (3.1 in)
5 July 1971
Aug
98.6 mm (3.9 in)
4 August 1946
Sep
50.0 mm (2.0 in)
12 September 1934
Oct
121.9 mm (4.8 in)
15 October 1954
Nov
58.4 mm (2.3 in)
30 November 1940
Dec
39.6 mm (1.6 in)
27 December 1968
Period of Record Coverage
1918 to 1979
Complete yearUnder 90 percent of days
58 years of record at Oak Ridges, 1918 to 1979. 8 years have data for under 90 percent of days and are left out of rankings: 1918, 1949, 1950, 1954, 1955, 1956, 1963, 1969.
Cooler than the station meanWarmer than the station mean
One stripe for each of 44 complete years at Oak Ridges, 1919 to 1979. Blue stripes are years cooler than the station's own mean of 6.5 C (43.8 F); red stripes are warmer. The coolest year was 1926, at 4.5 C (40.2 F), and the warmest was 1953, at 8.8 C (47.8 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Oak Ridges as warming stripes, 1919 to 1979
Year
Annual mean temperature
Difference from the station mean
1919
6.7 C
+0.14 C
1920
5.7 C
-0.81 C
1921
8.1 C
+1.58 C
1922
7.1 C
+0.57 C
1923
5.7 C
-0.81 C
1924
5.2 C
-1.40 C
1925
5.8 C
-0.77 C
1926
4.5 C
-2.01 C
1927
6.1 C
-0.42 C
1928
6.4 C
-0.20 C
1929
6.0 C
-0.53 C
1930
6.9 C
+0.35 C
1931
7.8 C
+1.28 C
1932
6.8 C
+0.28 C
1934
5.9 C
-0.68 C
1935
5.9 C
-0.66 C
1936
6.3 C
-0.23 C
1937
6.9 C
+0.35 C
1938
7.5 C
+0.96 C
1939
6.3 C
-0.22 C
1940
5.4 C
-1.16 C
1941
7.3 C
+0.76 C
1943
5.7 C
-0.90 C
1944
7.0 C
+0.40 C
1945
6.3 C
-0.21 C
1946
7.4 C
+0.87 C
1947
6.8 C
+0.23 C
1951
7.1 C
+0.59 C
1952
7.9 C
+1.31 C
1953
8.8 C
+2.20 C
1964
7.0 C
+0.41 C
1965
6.3 C
-0.28 C
1966
6.5 C
-0.01 C
1967
6.1 C
-0.50 C
1968
6.3 C
-0.28 C
1970
6.2 C
-0.32 C
1971
6.6 C
+0.08 C
1973
7.5 C
+0.93 C
1974
6.5 C
-0.08 C
1975
7.0 C
+0.48 C
1976
5.8 C
-0.80 C
1977
6.7 C
+0.19 C
1978
5.8 C
-0.76 C
1979
6.5 C
-0.02 C
The fitted trend in annual mean temperature here over 1919 to 1979 is 0.05 C (-0.08 to 0.18) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.2 to 0.3) per decade. The slope is a straight line fitted to 44 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Oak Ridges
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.05 C (-0.08 to 0.18) per decade
0.1 F (-0.2 to 0.3) per decade
1919 to 1979
44
Not clearly different from zero
Mean daily maximum
0.04 C (-0.12 to 0.20) per decade
0.1 F (-0.2 to 0.4) per decade
1919 to 1979
44
Not clearly different from zero
Mean daily minimum
0.1 C (-0.1 to 0.2) per decade
0.1 F (-0.1 to 0.3) per decade
1919 to 1979
44
Not clearly different from zero
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 1979
Yearly extremes at Oak Ridges: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.0 C (104.0 F)
1936
33.3 C (91.9 F)
58
Coldest night (TNn)
-34.4 C (-29.9 F)
1943
-26.6 C (-15.9 F)
58
Wettest day (Rx1day)
121.9 mm (4.8 in)
1954
45.7 mm (1.8 in)
59
Wettest five days (Rx5day)
172.5 mm (6.8 in)
1954
66.1 mm (2.6 in)
59
Longest dry spell (CDD)
33 days
1963
17 days
59
Hottest day (TXx)
The hottest day of the year at Oak Ridges, 1918 to 1979. The record is 40.0 C (104.0 F) in 1936, marked on the chart; the median year is 33.3 C (91.9 F).
Hottest day (TXx) at Oak Ridges by year
Year
Hottest day (TXx)
1918
36.1 C (97.0 F)
1919
33.9 C (93.0 F)
1920
30.6 C (87.1 F)
1921
36.1 C (97.0 F)
1922
32.2 C (90.0 F)
1923
34.4 C (93.9 F)
1924
33.3 C (91.9 F)
1925
32.8 C (91.0 F)
1926
32.8 C (91.0 F)
1927
31.7 C (89.1 F)
1928
32.2 C (90.0 F)
1929
32.8 C (91.0 F)
1930
33.9 C (93.0 F)
1931
36.7 C (98.1 F)
1932
34.4 C (93.9 F)
1933
35.0 C (95.0 F)
1934
34.4 C (93.9 F)
1935
33.9 C (93.0 F)
1936
40.0 C (104.0 F)
1937
34.4 C (93.9 F)
1938
34.4 C (93.9 F)
1939
35.6 C (96.1 F)
1940
31.7 C (89.1 F)
1941
36.7 C (98.1 F)
1942
33.3 C (91.9 F)
1943
33.3 C (91.9 F)
1944
35.0 C (95.0 F)
1945
32.8 C (91.0 F)
1946
35.6 C (96.1 F)
1947
33.9 C (93.0 F)
1948
37.8 C (100.0 F)
1949
34.4 C (93.9 F)
1950
32.2 C (90.0 F)
1951
31.7 C (89.1 F)
1952
36.7 C (98.1 F)
1953
35.6 C (96.1 F)
1954
32.8 C (91.0 F)
1955
32.2 C (90.0 F)
1956
33.3 C (91.9 F)
1957
33.3 C (91.9 F)
1958
n/a
1962
32.2 C (90.0 F)
1963
33.9 C (93.0 F)
1964
33.3 C (91.9 F)
1965
33.3 C (91.9 F)
1966
33.9 C (93.0 F)
1967
30.6 C (87.1 F)
1968
32.8 C (91.0 F)
1969
32.8 C (91.0 F)
1970
31.1 C (88.0 F)
1971
32.2 C (90.0 F)
1972
32.2 C (90.0 F)
1973
32.8 C (91.0 F)
1974
31.7 C (89.1 F)
1975
35.6 C (96.1 F)
1976
31.1 C (88.0 F)
1977
33.0 C (91.4 F)
1978
34.5 C (94.1 F)
1979
31.0 C (87.8 F)
Coldest night (TNn)
The coldest night of the year at Oak Ridges, 1918 to 1979. The record is -34.4 C (-29.9 F) in 1943, marked on the chart; the median year is -26.6 C (-15.9 F).
Coldest night (TNn) at Oak Ridges by year
Year
Coldest night (TNn)
1918
-17.8 C (0.0 F)
1919
-27.2 C (-17.0 F)
1920
-31.1 C (-24.0 F)
1921
-22.8 C (-9.0 F)
1922
-25.6 C (-14.1 F)
1923
-28.9 C (-20.0 F)
1924
-27.2 C (-17.0 F)
1925
-31.1 C (-24.0 F)
1926
-25.6 C (-14.1 F)
1927
-31.7 C (-25.1 F)
1928
-24.4 C (-11.9 F)
1929
-22.2 C (-8.0 F)
1930
-28.3 C (-18.9 F)
1931
-23.3 C (-9.9 F)
1932
-21.7 C (-7.1 F)
1933
-33.9 C (-29.0 F)
1934
-33.3 C (-27.9 F)
1935
-29.4 C (-20.9 F)
1936
-25.0 C (-13.0 F)
1937
-21.7 C (-7.1 F)
1938
-27.2 C (-17.0 F)
1939
-28.3 C (-18.9 F)
1940
-28.3 C (-18.9 F)
1941
-24.4 C (-11.9 F)
1942
-33.9 C (-29.0 F)
1943
-34.4 C (-29.9 F)
1944
-22.8 C (-9.0 F)
1945
-30.0 C (-22.0 F)
1946
-25.6 C (-14.1 F)
1947
-22.2 C (-8.0 F)
1948
-23.9 C (-11.0 F)
1949
-22.8 C (-9.0 F)
1950
-27.8 C (-18.0 F)
1951
-18.3 C (-0.9 F)
1952
-27.2 C (-17.0 F)
1953
-18.9 C (-2.0 F)
1954
-24.4 C (-11.9 F)
1955
-26.1 C (-15.0 F)
1956
-23.9 C (-11.0 F)
1957
-30.0 C (-22.0 F)
1958
n/a
1962
-27.8 C (-18.0 F)
1963
-28.3 C (-18.9 F)
1964
-24.4 C (-11.9 F)
1965
-26.1 C (-15.0 F)
1966
-26.7 C (-16.1 F)
1967
-29.4 C (-20.9 F)
1968
-28.3 C (-18.9 F)
1969
-22.8 C (-9.0 F)
1970
-26.7 C (-16.1 F)
1971
-23.9 C (-11.0 F)
1972
-26.7 C (-16.1 F)
1973
-25.0 C (-13.0 F)
1974
-22.2 C (-8.0 F)
1975
-26.1 C (-15.0 F)
1976
-31.1 C (-24.0 F)
1977
-28.9 C (-20.0 F)
1978
-26.5 C (-15.7 F)
1979
-28.0 C (-18.4 F)
Wettest day (Rx1day)
The wettest day of the year at Oak Ridges, 1918 to 1979. The record is 121.9 mm (4.8 in) in 1954, marked on the chart; the median year is 45.7 mm (1.8 in).
Wettest day (Rx1day) at Oak Ridges by year
Year
Wettest day (Rx1day)
1918
45.7 mm (1.8 in)
1919
40.6 mm (1.6 in)
1920
29.5 mm (1.2 in)
1921
64.5 mm (2.5 in)
1922
47.2 mm (1.9 in)
1923
35.3 mm (1.4 in)
1924
48.3 mm (1.9 in)
1925
47.2 mm (1.9 in)
1926
41.4 mm (1.6 in)
1927
39.4 mm (1.6 in)
1928
49.5 mm (1.9 in)
1929
67.8 mm (2.7 in)
1930
30.7 mm (1.2 in)
1931
40.6 mm (1.6 in)
1932
54.4 mm (2.1 in)
1933
22.1 mm (0.9 in)
1934
52.3 mm (2.1 in)
1935
41.4 mm (1.6 in)
1936
31.2 mm (1.2 in)
1937
61.5 mm (2.4 in)
1938
49.0 mm (1.9 in)
1939
47.8 mm (1.9 in)
1940
58.4 mm (2.3 in)
1941
23.9 mm (0.9 in)
1942
58.9 mm (2.3 in)
1943
53.3 mm (2.1 in)
1944
73.7 mm (2.9 in)
1945
42.2 mm (1.7 in)
1946
98.6 mm (3.9 in)
1947
43.9 mm (1.7 in)
1948
39.4 mm (1.6 in)
1949
48.0 mm (1.9 in)
1950
40.6 mm (1.6 in)
1951
48.5 mm (1.9 in)
1952
53.8 mm (2.1 in)
1953
39.1 mm (1.5 in)
1954
121.9 mm (4.8 in)
1955
59.4 mm (2.3 in)
1956
42.7 mm (1.7 in)
1957
39.4 mm (1.6 in)
1958
21.1 mm (0.8 in)
1962
44.5 mm (1.8 in)
1963
32.5 mm (1.3 in)
1964
57.9 mm (2.3 in)
1965
45.7 mm (1.8 in)
1966
33.5 mm (1.3 in)
1967
73.4 mm (2.9 in)
1968
52.1 mm (2.1 in)
1969
49.5 mm (1.9 in)
1970
28.4 mm (1.1 in)
1971
78.5 mm (3.1 in)
1972
34.3 mm (1.4 in)
1973
26.7 mm (1.1 in)
1974
39.4 mm (1.6 in)
1975
30.5 mm (1.2 in)
1976
77.7 mm (3.1 in)
1977
38.2 mm (1.5 in)
1978
40.4 mm (1.6 in)
1979
64.8 mm (2.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Oak Ridges, 1918 to 1979. The record is 172.5 mm (6.8 in) in 1954, marked on the chart; the median year is 66.1 mm (2.6 in).
Wettest five days (Rx5day) at Oak Ridges by year
Year
Wettest five days (Rx5day)
1918
51.0 mm (2.0 in)
1919
56.0 mm (2.2 in)
1920
42.7 mm (1.7 in)
1921
80.2 mm (3.2 in)
1922
60.8 mm (2.4 in)
1923
43.4 mm (1.7 in)
1924
63.8 mm (2.5 in)
1925
69.8 mm (2.7 in)
1926
80.2 mm (3.2 in)
1927
56.4 mm (2.2 in)
1928
82.4 mm (3.2 in)
1929
95.5 mm (3.8 in)
1930
39.1 mm (1.5 in)
1931
60.2 mm (2.4 in)
1932
66.1 mm (2.6 in)
1933
29.4 mm (1.2 in)
1934
81.5 mm (3.2 in)
1935
111.8 mm (4.4 in)
1936
55.1 mm (2.2 in)
1937
78.3 mm (3.1 in)
1938
94.7 mm (3.7 in)
1939
48.6 mm (1.9 in)
1940
91.4 mm (3.6 in)
1941
37.1 mm (1.5 in)
1942
77.4 mm (3.0 in)
1943
64.5 mm (2.5 in)
1944
80.1 mm (3.2 in)
1945
72.6 mm (2.9 in)
1946
101.4 mm (4.0 in)
1947
82.8 mm (3.3 in)
1948
50.5 mm (2.0 in)
1949
53.9 mm (2.1 in)
1950
51.7 mm (2.0 in)
1951
67.8 mm (2.7 in)
1952
76.5 mm (3.0 in)
1953
60.7 mm (2.4 in)
1954
172.5 mm (6.8 in)
1955
96.8 mm (3.8 in)
1956
80.0 mm (3.1 in)
1957
89.9 mm (3.5 in)
1958
31.9 mm (1.3 in)
1962
83.4 mm (3.3 in)
1963
45.3 mm (1.8 in)
1964
82.2 mm (3.2 in)
1965
66.0 mm (2.6 in)
1966
75.0 mm (3.0 in)
1967
91.4 mm (3.6 in)
1968
97.8 mm (3.9 in)
1969
59.9 mm (2.4 in)
1970
55.8 mm (2.2 in)
1971
79.5 mm (3.1 in)
1972
47.1 mm (1.9 in)
1973
48.8 mm (1.9 in)
1974
56.9 mm (2.2 in)
1975
40.1 mm (1.6 in)
1976
84.3 mm (3.3 in)
1977
64.5 mm (2.5 in)
1978
57.1 mm (2.2 in)
1979
69.5 mm (2.7 in)
Longest dry spell (CDD)
The longest dry spell of the year at Oak Ridges, 1918 to 1979. The record is 33 days in 1963, marked on the chart; the median year is 17 days.
Longest dry spell (CDD) at Oak Ridges by year
Year
Longest dry spell (CDD)
1918
9 days
1919
23 days
1920
14 days
1921
14 days
1922
19 days
1923
25 days
1924
27 days
1925
24 days
1926
31 days
1927
15 days
1928
16 days
1929
20 days
1930
21 days
1931
26 days
1932
18 days
1933
16 days
1934
17 days
1935
18 days
1936
24 days
1937
15 days
1938
16 days
1939
20 days
1940
17 days
1941
12 days
1942
17 days
1943
29 days
1944
16 days
1945
11 days
1946
24 days
1947
17 days
1948
20 days
1949
14 days
1950
15 days
1951
16 days
1952
25 days
1953
16 days
1954
18 days
1955
12 days
1956
13 days
1957
22 days
1958
19 days
1962
11 days
1963
33 days
1964
14 days
1965
19 days
1966
16 days
1967
21 days
1968
13 days
1969
24 days
1970
16 days
1971
17 days
1972
15 days
1973
27 days
1974
15 days
1975
14 days
1976
13 days
1977
19 days
1978
16 days
1979
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
44 years with a frost
Across 44 years with a frost, the median last spring frost at Oak Ridges falls on 12 May and the median first autumn frost on 8 October, which leaves a median of 148 days between them.
Fitted over all years, the growing season changes by +1.5 days per decade at this station.
Frost dates and growing season at Oak Ridges
Measure
Median, all years
Earliest period
Recent period (1934 to 1979)
Recent against earliest
Fitted trend
Last spring frost
12 May
n/a
11 May
n/a
0.0 days per decade
First autumn frost
8 October
n/a
8 October
n/a
+1.5 days per decade
Growing days
148 days
n/a
151 days
n/a
+1.5 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
48 years, 1919 to 1979
A day with at least 44.6 mm (1.8 in) of rain is expected about once in 2 years. A day with at least 99.5 mm (3.9 in) of rain is expected about once in 100 years.
Rainfall return levels at Oak Ridges: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
44.6 mm (1.8 in)
5 years
58.9 mm (2.3 in)
10 years
68.5 mm (2.7 in)
25 years
80.8 mm (3.2 in)
50 years
90.1 mm (3.5 in)
Longer than the 48 years of record
100 years
99.5 mm (3.9 in)
Longer than the 48 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, 48 years of values from 1919 to 1979.
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: 98.6 mm (3.9 in) in 1946; 78.5 mm (3.1 in) in 1971; 77.7 mm (3.1 in) in 1976.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Oak Ridges standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Oak Ridges 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.