Record envelope, standing records and threshold days for Oakville (USC00456011), Washington, United States, with 82 years of record.
Key Facts for Oakville
Oakville (USC00456011) is a weather station in Washington, United States at 46.83 latitude and -123.23 longitude, 24 m (80 ft) above sea level.
The station reports from 1916 to 1997, 82 years of record.
1,464 records set at Oakville still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Oakville set a daily record precipitation of 88.4 mm (3.5 in) on 16 December 1997.
About the Station
Location: Washington, United States, 46.83 latitude, -123.23 longitude.
Elevation: 24 m (80 ft).
Period of record: 1916 to 1997, 82 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Oakville. 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 Oakville, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
18.9 C (66.0 F)
-22.2 C (-8.0 F)
n/a
n/a
Feb
23.9 C (75.0 F)
-16.1 C (3.0 F)
n/a
n/a
Mar
26.7 C (80.1 F)
-10.6 C (12.9 F)
n/a
n/a
Apr
32.8 C (91.0 F)
-6.7 C (19.9 F)
n/a
n/a
May
36.7 C (98.1 F)
-5.6 C (21.9 F)
n/a
n/a
Jun
37.8 C (100.0 F)
-5.6 C (21.9 F)
n/a
n/a
Jul
40.6 C (105.1 F)
0.6 C (33.1 F)
n/a
n/a
Aug
40.6 C (105.1 F)
-3.9 C (25.0 F)
n/a
n/a
Sep
37.8 C (100.0 F)
-5.0 C (23.0 F)
n/a
n/a
Oct
32.2 C (90.0 F)
-8.9 C (16.0 F)
n/a
n/a
Nov
22.2 C (72.0 F)
-16.7 C (1.9 F)
n/a
n/a
Dec
18.9 C (66.0 F)
-21.1 C (-6.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Oakville still stand. 1917 holds the most, with 49.
Standing records at Oakville by the year they were set
Year set
Standing records
1916
22
1917
49
1918
23
1919
24
1920
18
1921
18
1922
23
1923
16
1924
31
1925
23
1926
28
1927
25
1928
32
1929
15
1930
30
1931
12
1932
13
1933
18
1934
30
1935
32
1936
4
1937
17
1938
13
1939
24
1940
17
1941
30
1942
18
1943
20
1944
16
1945
18
1946
7
1947
11
1948
5
1949
24
1950
26
1951
25
1952
19
1953
11
1954
15
1955
36
1956
25
1957
7
1958
18
1959
9
1960
12
1961
17
1962
20
1963
16
1964
2
1965
1
1966
15
1967
10
1968
23
1969
24
1970
17
1971
16
1972
24
1973
18
1974
13
1975
20
1976
16
1977
19
1978
13
1979
16
1980
13
1981
12
1982
11
1983
15
1984
14
1985
28
1986
16
1987
22
1988
11
1989
22
1990
8
1991
9
1992
15
1993
12
1994
17
1995
9
1996
11
1997
10
Wettest Day of Each Month
Jan: 109.5 mm (4.3 in)
The wettest day on record for each calendar month at Oakville. The most was 109.5 mm (4.3 in) on 22 January 1919.
Record daily precipitation for each month at Oakville
Month
Record daily precipitation (mm)
Date
Jan
109.5 mm (4.3 in)
22 January 1919
Feb
85.1 mm (3.4 in)
9 February 1951
Mar
69.3 mm (2.7 in)
19 March 1997
Apr
93.5 mm (3.7 in)
23 April 1996
May
37.3 mm (1.5 in)
16 May 1941
Jun
50.8 mm (2.0 in)
6 June 1958
Jul
27.9 mm (1.1 in)
2 July 1983
Aug
41.9 mm (1.6 in)
26 August 1926
Sep
57.2 mm (2.3 in)
21 September 1972
Oct
97.0 mm (3.8 in)
31 October 1942
Nov
69.1 mm (2.7 in)
20 November 1959
Dec
106.9 mm (4.2 in)
9 December 1933
Period of Record Coverage
1916 to 1997
Complete yearUnder 90 percent of days
82 years of record at Oakville, 1916 to 1997. 18 years have data for under 90 percent of days and are left out of rankings: 1916, 1917, 1927, 1928, 1929, 1931, 1932, 1936 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 53 complete years at Oakville, 1918 to 1994. Blue stripes are years cooler than the station's own mean of 10.4 C (50.8 F); red stripes are warmer. The coolest year was 1955, at 9.1 C (48.5 F), and the warmest was 1934, at 12.0 C (53.5 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at Oakville as warming stripes, 1918 to 1994
Year
Annual mean temperature
Difference from the station mean
1918
10.7 C
+0.26 C
1919
9.9 C
-0.58 C
1920
9.7 C
-0.77 C
1921
9.9 C
-0.53 C
1922
9.2 C
-1.23 C
1923
10.3 C
-0.17 C
1924
9.7 C
-0.76 C
1926
11.3 C
+0.88 C
1930
9.5 C
-0.90 C
1934
12.0 C
+1.52 C
1937
10.4 C
0.00 C
1939
11.3 C
+0.90 C
1940
11.8 C
+1.35 C
1941
11.7 C
+1.30 C
1943
10.3 C
-0.18 C
1944
10.4 C
-0.03 C
1946
10.1 C
-0.30 C
1949
10.0 C
-0.39 C
1951
10.0 C
-0.41 C
1952
10.3 C
-0.17 C
1953
10.8 C
+0.38 C
1955
9.1 C
-1.29 C
1956
10.1 C
-0.30 C
1958
11.9 C
+1.47 C
1959
10.2 C
-0.22 C
1960
10.1 C
-0.33 C
1961
10.9 C
+0.46 C
1962
10.4 C
-0.01 C
1963
10.5 C
+0.09 C
1967
10.7 C
+0.27 C
1968
10.2 C
-0.28 C
1969
9.7 C
-0.73 C
1970
9.8 C
-0.68 C
1971
9.7 C
-0.78 C
1972
9.8 C
-0.68 C
1973
10.0 C
-0.47 C
1974
10.1 C
-0.33 C
1975
9.7 C
-0.69 C
1976
9.9 C
-0.55 C
1977
10.1 C
-0.38 C
1979
10.3 C
-0.12 C
1981
11.3 C
+0.83 C
1982
10.6 C
+0.20 C
1983
11.2 C
+0.77 C
1985
9.5 C
-0.98 C
1986
11.2 C
+0.76 C
1987
11.5 C
+1.11 C
1988
10.8 C
+0.39 C
1989
10.7 C
+0.28 C
1991
10.6 C
+0.19 C
1992
11.8 C
+1.33 C
1993
10.4 C
+0.01 C
1994
11.0 C
+0.57 C
The fitted trend in annual mean temperature here over 1918 to 1994 is 0.05 C (-0.04 to 0.14) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.1 to 0.2) per decade. The slope is a straight line fitted to 53 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Oakville
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.05 C (-0.04 to 0.14) per decade
0.1 F (-0.1 to 0.2) per decade
1918 to 1994
53
Not clearly different from zero
Mean daily maximum
0.04 C (-0.05 to 0.13) per decade
0.1 F (-0.1 to 0.2) per decade
1918 to 1994
53
Not clearly different from zero
Mean daily minimum
0.06 C (-0.04 to 0.16) per decade
0.1 F (-0.1 to 0.3) per decade
1918 to 1994
53
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
1916 to 1997
Yearly extremes at Oakville: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.6 C (105.1 F)
1941
36.1 C (97.0 F)
82
Coldest night (TNn)
-22.2 C (-8.0 F)
1930
-10.6 C (12.9 F)
82
Wettest day (Rx1day)
109.5 mm (4.3 in)
1919
54.6 mm (2.1 in)
82
Wettest five days (Rx5day)
245.7 mm (9.7 in)
1933
125.3 mm (4.9 in)
82
Longest dry spell (CDD)
75 days
1942
35 days
82
Hottest day (TXx)
The hottest day of the year at Oakville, 1916 to 1997. The record is 40.6 C (105.1 F) in 1941, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Oakville by year
Year
Hottest day (TXx)
1916
37.8 C (100.0 F)
1917
33.9 C (93.0 F)
1918
34.4 C (93.9 F)
1919
36.1 C (97.0 F)
1920
36.1 C (97.0 F)
1921
32.2 C (90.0 F)
1922
36.1 C (97.0 F)
1923
36.7 C (98.1 F)
1924
38.3 C (100.9 F)
1925
37.2 C (99.0 F)
1926
38.9 C (102.0 F)
1927
38.3 C (100.9 F)
1928
39.4 C (102.9 F)
1929
35.0 C (95.0 F)
1930
33.9 C (93.0 F)
1931
38.9 C (102.0 F)
1932
33.9 C (93.0 F)
1933
38.9 C (102.0 F)
1934
35.0 C (95.0 F)
1935
38.3 C (100.9 F)
1936
33.3 C (91.9 F)
1937
33.9 C (93.0 F)
1938
38.9 C (102.0 F)
1939
38.3 C (100.9 F)
1940
37.8 C (100.0 F)
1941
40.6 C (105.1 F)
1942
38.3 C (100.9 F)
1943
33.3 C (91.9 F)
1944
37.2 C (99.0 F)
1945
35.6 C (96.1 F)
1946
36.1 C (97.0 F)
1947
32.8 C (91.0 F)
1948
33.9 C (93.0 F)
1949
33.9 C (93.0 F)
1950
33.3 C (91.9 F)
1951
36.1 C (97.0 F)
1952
36.7 C (98.1 F)
1953
34.4 C (93.9 F)
1954
28.3 C (82.9 F)
1955
36.7 C (98.1 F)
1956
38.9 C (102.0 F)
1957
35.0 C (95.0 F)
1958
38.3 C (100.9 F)
1959
34.4 C (93.9 F)
1960
37.8 C (100.0 F)
1961
37.8 C (100.0 F)
1962
32.2 C (90.0 F)
1963
33.3 C (91.9 F)
1964
31.7 C (89.1 F)
1965
18.3 C (64.9 F)
1966
31.7 C (89.1 F)
1967
35.0 C (95.0 F)
1968
34.4 C (93.9 F)
1969
33.9 C (93.0 F)
1970
35.6 C (96.1 F)
1971
36.7 C (98.1 F)
1972
36.1 C (97.0 F)
1973
32.8 C (91.0 F)
1974
33.3 C (91.9 F)
1975
33.3 C (91.9 F)
1976
30.0 C (86.0 F)
1977
38.9 C (102.0 F)
1978
38.9 C (102.0 F)
1979
36.1 C (97.0 F)
1980
27.2 C (81.0 F)
1981
40.6 C (105.1 F)
1982
37.8 C (100.0 F)
1983
36.7 C (98.1 F)
1984
34.4 C (93.9 F)
1985
37.2 C (99.0 F)
1986
36.1 C (97.0 F)
1987
36.1 C (97.0 F)
1988
37.8 C (100.0 F)
1989
34.4 C (93.9 F)
1990
35.6 C (96.1 F)
1991
35.0 C (95.0 F)
1992
36.1 C (97.0 F)
1993
35.6 C (96.1 F)
1994
37.8 C (100.0 F)
1995
36.1 C (97.0 F)
1996
25.6 C (78.1 F)
1997
34.4 C (93.9 F)
Coldest night (TNn)
The coldest night of the year at Oakville, 1916 to 1997. The record is -22.2 C (-8.0 F) in 1930, marked on the chart; the median year is -10.6 C (12.9 F).
Coldest night (TNn) at Oakville by year
Year
Coldest night (TNn)
1916
-8.9 C (16.0 F)
1917
-17.2 C (1.0 F)
1918
-6.1 C (21.0 F)
1919
-8.3 C (17.1 F)
1920
-10.0 C (14.0 F)
1921
-6.7 C (19.9 F)
1922
-15.6 C (3.9 F)
1923
-10.6 C (12.9 F)
1924
-17.8 C (0.0 F)
1925
-5.0 C (23.0 F)
1926
-10.6 C (12.9 F)
1927
-11.7 C (10.9 F)
1928
-7.8 C (18.0 F)
1929
-15.6 C (3.9 F)
1930
-22.2 C (-8.0 F)
1931
-7.2 C (19.0 F)
1932
-11.7 C (10.9 F)
1933
-13.9 C (7.0 F)
1934
-2.8 C (27.0 F)
1935
-15.6 C (3.9 F)
1936
-8.9 C (16.0 F)
1937
-13.3 C (8.1 F)
1938
-6.7 C (19.9 F)
1939
-5.6 C (21.9 F)
1940
-7.8 C (18.0 F)
1941
-5.6 C (21.9 F)
1942
-10.6 C (12.9 F)
1943
-17.8 C (0.0 F)
1944
-11.7 C (10.9 F)
1945
-7.2 C (19.0 F)
1946
-8.3 C (17.1 F)
1947
-4.4 C (24.1 F)
1948
-8.3 C (17.1 F)
1949
-16.1 C (3.0 F)
1950
-16.1 C (3.0 F)
1951
-11.7 C (10.9 F)
1952
-13.3 C (8.1 F)
1953
-5.6 C (21.9 F)
1954
-6.7 C (19.9 F)
1955
-16.1 C (3.0 F)
1956
-12.2 C (10.0 F)
1957
-17.2 C (1.0 F)
1958
-6.1 C (21.0 F)
1959
-11.7 C (10.9 F)
1960
-7.2 C (19.0 F)
1961
-6.7 C (19.9 F)
1962
-13.3 C (8.1 F)
1963
-13.3 C (8.1 F)
1964
-14.4 C (6.1 F)
1965
-2.8 C (27.0 F)
1966
-5.0 C (23.0 F)
1967
-10.0 C (14.0 F)
1968
-12.2 C (10.0 F)
1969
-15.0 C (5.0 F)
1970
-7.2 C (19.0 F)
1971
-9.4 C (15.1 F)
1972
-21.1 C (-6.0 F)
1973
-16.1 C (3.0 F)
1974
-17.2 C (1.0 F)
1975
-7.8 C (18.0 F)
1976
-10.6 C (12.9 F)
1977
-12.2 C (10.0 F)
1978
-19.4 C (-2.9 F)
1979
-17.8 C (0.0 F)
1980
-18.3 C (-0.9 F)
1981
-6.7 C (19.9 F)
1982
-12.2 C (10.0 F)
1983
-20.6 C (-5.1 F)
1984
-11.1 C (12.0 F)
1985
-16.7 C (1.9 F)
1986
-7.2 C (19.0 F)
1987
-7.2 C (19.0 F)
1988
-7.2 C (19.0 F)
1989
-16.1 C (3.0 F)
1990
-15.6 C (3.9 F)
1991
-7.8 C (18.0 F)
1992
-6.7 C (19.9 F)
1993
-13.9 C (7.0 F)
1994
-8.9 C (16.0 F)
1995
-8.9 C (16.0 F)
1996
-10.6 C (12.9 F)
1997
-10.0 C (14.0 F)
Wettest day (Rx1day)
The wettest day of the year at Oakville, 1916 to 1997. The record is 109.5 mm (4.3 in) in 1919, marked on the chart; the median year is 54.6 mm (2.1 in).
Wettest day (Rx1day) at Oakville by year
Year
Wettest day (Rx1day)
1916
59.9 mm (2.4 in)
1917
58.2 mm (2.3 in)
1918
49.5 mm (1.9 in)
1919
109.5 mm (4.3 in)
1920
55.9 mm (2.2 in)
1921
81.3 mm (3.2 in)
1922
36.8 mm (1.4 in)
1923
68.8 mm (2.7 in)
1924
65.5 mm (2.6 in)
1925
48.3 mm (1.9 in)
1926
41.9 mm (1.6 in)
1927
63.5 mm (2.5 in)
1928
52.6 mm (2.1 in)
1929
45.0 mm (1.8 in)
1930
41.7 mm (1.6 in)
1931
65.5 mm (2.6 in)
1932
43.4 mm (1.7 in)
1933
106.9 mm (4.2 in)
1934
64.8 mm (2.6 in)
1935
88.4 mm (3.5 in)
1936
13.5 mm (0.5 in)
1937
80.5 mm (3.2 in)
1938
36.3 mm (1.4 in)
1939
58.9 mm (2.3 in)
1940
54.9 mm (2.2 in)
1941
62.2 mm (2.4 in)
1942
97.0 mm (3.8 in)
1943
76.2 mm (3.0 in)
1944
31.0 mm (1.2 in)
1945
74.7 mm (2.9 in)
1946
49.0 mm (1.9 in)
1947
66.0 mm (2.6 in)
1948
50.8 mm (2.0 in)
1949
50.8 mm (2.0 in)
1950
49.3 mm (1.9 in)
1951
85.1 mm (3.4 in)
1952
34.3 mm (1.4 in)
1953
53.3 mm (2.1 in)
1954
48.3 mm (1.9 in)
1955
48.3 mm (1.9 in)
1956
44.5 mm (1.8 in)
1957
34.3 mm (1.4 in)
1958
57.9 mm (2.3 in)
1959
69.1 mm (2.7 in)
1960
44.7 mm (1.8 in)
1961
39.9 mm (1.6 in)
1962
62.5 mm (2.5 in)
1963
35.6 mm (1.4 in)
1964
55.9 mm (2.2 in)
1965
40.1 mm (1.6 in)
1966
54.6 mm (2.1 in)
1967
42.7 mm (1.7 in)
1968
49.0 mm (1.9 in)
1969
45.7 mm (1.8 in)
1970
66.0 mm (2.6 in)
1971
50.8 mm (2.0 in)
1972
62.2 mm (2.4 in)
1973
66.8 mm (2.6 in)
1974
50.8 mm (2.0 in)
1975
49.8 mm (2.0 in)
1976
48.0 mm (1.9 in)
1977
68.6 mm (2.7 in)
1978
39.4 mm (1.6 in)
1979
51.8 mm (2.0 in)
1980
51.6 mm (2.0 in)
1981
54.6 mm (2.1 in)
1982
66.0 mm (2.6 in)
1983
53.3 mm (2.1 in)
1984
53.3 mm (2.1 in)
1985
56.1 mm (2.2 in)
1986
73.7 mm (2.9 in)
1987
62.2 mm (2.4 in)
1988
54.6 mm (2.1 in)
1989
62.2 mm (2.4 in)
1990
66.0 mm (2.6 in)
1991
50.8 mm (2.0 in)
1992
62.2 mm (2.4 in)
1993
43.2 mm (1.7 in)
1994
56.9 mm (2.2 in)
1995
55.6 mm (2.2 in)
1996
93.5 mm (3.7 in)
1997
88.4 mm (3.5 in)
Wettest five days (Rx5day)
The wettest five days of the year at Oakville, 1916 to 1997. The record is 245.7 mm (9.7 in) in 1933, marked on the chart; the median year is 125.3 mm (4.9 in).
Wettest five days (Rx5day) at Oakville by year
Year
Wettest five days (Rx5day)
1916
90.5 mm (3.6 in)
1917
186.0 mm (7.3 in)
1918
111.2 mm (4.4 in)
1919
192.3 mm (7.6 in)
1920
132.8 mm (5.2 in)
1921
173.3 mm (6.8 in)
1922
126.6 mm (5.0 in)
1923
165.3 mm (6.5 in)
1924
104.1 mm (4.1 in)
1925
103.6 mm (4.1 in)
1926
84.0 mm (3.3 in)
1927
134.6 mm (5.3 in)
1928
90.9 mm (3.6 in)
1929
107.7 mm (4.2 in)
1930
94.0 mm (3.7 in)
1931
118.9 mm (4.7 in)
1932
96.7 mm (3.8 in)
1933
245.7 mm (9.7 in)
1934
178.9 mm (7.0 in)
1935
181.8 mm (7.2 in)
1936
13.8 mm (0.5 in)
1937
194.6 mm (7.7 in)
1938
83.8 mm (3.3 in)
1939
146.5 mm (5.8 in)
1940
117.1 mm (4.6 in)
1941
136.9 mm (5.4 in)
1942
142.7 mm (5.6 in)
1943
111.0 mm (4.4 in)
1944
71.4 mm (2.8 in)
1945
120.6 mm (4.7 in)
1946
85.7 mm (3.4 in)
1947
122.9 mm (4.8 in)
1948
133.5 mm (5.3 in)
1949
123.2 mm (4.9 in)
1950
118.1 mm (4.6 in)
1951
137.3 mm (5.4 in)
1952
107.4 mm (4.2 in)
1953
130.8 mm (5.1 in)
1954
154.2 mm (6.1 in)
1955
128.3 mm (5.1 in)
1956
138.6 mm (5.5 in)
1957
109.9 mm (4.3 in)
1958
111.7 mm (4.4 in)
1959
185.5 mm (7.3 in)
1960
89.8 mm (3.5 in)
1961
102.4 mm (4.0 in)
1962
112.0 mm (4.4 in)
1963
103.0 mm (4.1 in)
1964
111.8 mm (4.4 in)
1965
94.1 mm (3.7 in)
1966
164.9 mm (6.5 in)
1967
106.7 mm (4.2 in)
1968
132.9 mm (5.2 in)
1969
102.9 mm (4.1 in)
1970
135.4 mm (5.3 in)
1971
119.0 mm (4.7 in)
1972
204.5 mm (8.1 in)
1973
164.1 mm (6.5 in)
1974
179.1 mm (7.1 in)
1975
163.1 mm (6.4 in)
1976
162.9 mm (6.4 in)
1977
219.2 mm (8.6 in)
1978
91.4 mm (3.6 in)
1979
140.8 mm (5.5 in)
1980
113.6 mm (4.5 in)
1981
212.3 mm (8.4 in)
1982
160.8 mm (6.3 in)
1983
135.1 mm (5.3 in)
1984
111.0 mm (4.4 in)
1985
124.0 mm (4.9 in)
1986
181.1 mm (7.1 in)
1987
134.7 mm (5.3 in)
1988
120.4 mm (4.7 in)
1989
101.3 mm (4.0 in)
1990
154.9 mm (6.1 in)
1991
92.8 mm (3.7 in)
1992
109.7 mm (4.3 in)
1993
117.1 mm (4.6 in)
1994
153.9 mm (6.1 in)
1995
141.0 mm (5.6 in)
1996
204.5 mm (8.1 in)
1997
148.9 mm (5.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Oakville, 1916 to 1997. The record is 75 days in 1942, marked on the chart; the median year is 35 days.
Longest dry spell (CDD) at Oakville by year
Year
Longest dry spell (CDD)
1916
35 days
1917
48 days
1918
49 days
1919
68 days
1920
45 days
1921
47 days
1922
47 days
1923
30 days
1924
32 days
1925
29 days
1926
58 days
1927
38 days
1928
66 days
1929
22 days
1930
66 days
1931
50 days
1932
23 days
1933
27 days
1934
36 days
1935
22 days
1936
27 days
1937
38 days
1938
2 days
1939
20 days
1940
37 days
1941
24 days
1942
75 days
1943
31 days
1944
61 days
1945
37 days
1946
46 days
1947
21 days
1948
20 days
1949
20 days
1950
30 days
1951
36 days
1952
36 days
1953
22 days
1954
25 days
1955
43 days
1956
37 days
1957
8 days
1958
41 days
1959
41 days
1960
55 days
1961
39 days
1962
27 days
1963
23 days
1964
14 days
1965
8 days
1966
41 days
1967
43 days
1968
27 days
1969
24 days
1970
28 days
1971
19 days
1972
19 days
1973
40 days
1974
34 days
1975
32 days
1976
17 days
1977
42 days
1978
30 days
1979
38 days
1980
18 days
1981
39 days
1982
27 days
1983
16 days
1984
47 days
1985
46 days
1986
53 days
1987
45 days
1988
34 days
1989
27 days
1990
41 days
1991
46 days
1992
31 days
1993
43 days
1994
36 days
1995
24 days
1996
8 days
1997
27 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
53 years with a frost
Across 53 years with a frost, the median last spring frost at Oakville falls on 5 May and the median first autumn frost on 11 October, which leaves a median of 160 days between them.
Fitted over all years, the growing season changes by +0.5 days per decade at this station.
Frost dates and growing season at Oakville
Measure
Median, all years
Earliest period
Recent period (1958 to 1994)
Recent against earliest
Fitted trend
Last spring frost
5 May
n/a
1 May
n/a
-1.8 days per decade
First autumn frost
11 October
n/a
4 October
n/a
-1.4 days per decade
Growing days
160 days
n/a
160 days
n/a
+0.5 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
68 years, 1917 to 1997
A day with at least 55.2 mm (2.2 in) of rain is expected about once in 2 years. A day with at least 105.2 mm (4.1 in) of rain is expected about once in 100 years.
Rainfall return levels at Oakville: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
55.2 mm (2.2 in)
5 years
68.3 mm (2.7 in)
10 years
77.0 mm (3.0 in)
25 years
88.3 mm (3.5 in)
50 years
96.7 mm (3.8 in)
100 years
105.2 mm (4.1 in)
Longer than the 68 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, 68 years of values from 1917 to 1997.
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: 109.5 mm (4.3 in) in 1919; 106.9 mm (4.2 in) in 1933; 88.4 mm (3.5 in) in 1997.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Oakville standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Oakville 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.