Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Macdonald College. 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 Macdonald College, 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)
-38.3 C (-36.9 F)
n/a
n/a
Feb
12.8 C (55.0 F)
-36.7 C (-34.1 F)
n/a
n/a
Mar
25.6 C (78.1 F)
-33.3 C (-27.9 F)
n/a
n/a
Apr
30.6 C (87.1 F)
-17.2 C (1.0 F)
n/a
n/a
May
34.4 C (93.9 F)
-3.9 C (25.0 F)
n/a
n/a
Jun
35.0 C (95.0 F)
0.0 C (32.0 F)
n/a
n/a
Jul
36.7 C (98.1 F)
5.6 C (42.1 F)
n/a
n/a
Aug
36.7 C (98.1 F)
3.3 C (37.9 F)
n/a
n/a
Sep
32.2 C (90.0 F)
-2.2 C (28.0 F)
n/a
n/a
Oct
28.9 C (84.0 F)
-7.8 C (18.0 F)
n/a
n/a
Nov
25.0 C (77.0 F)
-22.2 C (-8.0 F)
n/a
n/a
Dec
16.1 C (61.0 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 Macdonald College still stand. 1911 holds the most, with 55.
Standing records at Macdonald College by the year they were set
Year set
Standing records
1906
8
1907
22
1908
32
1909
15
1910
21
1911
55
1912
31
1913
27
1914
39
1915
8
1916
32
1917
28
1918
20
1919
25
1920
29
1921
20
1922
19
1923
32
1924
13
1925
25
1926
21
1927
14
1928
17
1929
17
1930
28
1931
16
1932
21
1933
28
1934
23
1935
13
1936
29
1937
11
1938
16
1939
6
1940
20
1941
18
1942
29
1943
24
1944
17
1945
33
1946
26
1947
28
1948
27
1949
29
1950
36
1951
18
1952
10
1953
31
1954
20
1955
10
1956
16
1957
19
1958
7
1959
17
1960
11
1961
13
1962
16
1963
16
1964
18
1965
28
1966
25
1967
8
1968
23
1969
11
1970
18
1971
11
1972
11
1973
20
1974
16
1975
18
1976
5
All-Time Record Progression
1 new records
1 all-time records were set at Macdonald College between 15 January 1957 and 15 January 1957. Each dot is a new record.
When Macdonald College set new all-time records
Date
Kind
Detail
1957-01-15
Record low minimum temperature
Record low minimum temperature -38.3 C (-36.9 F)
Wettest Day of Each Month
Oct: 91.7 mm (3.6 in)
The wettest day on record for each calendar month at Macdonald College. The most was 91.7 mm (3.6 in) on 6 October 1932.
Record daily precipitation for each month at Macdonald College
Month
Record daily precipitation (mm)
Date
Jan
56.6 mm (2.2 in)
22 January 1957
Feb
40.6 mm (1.6 in)
13 February 1923
Mar
38.1 mm (1.5 in)
6 March 1920
Apr
58.2 mm (2.3 in)
12 April 1934
May
46.7 mm (1.8 in)
17 May 1916
Jun
74.9 mm (2.9 in)
25 June 1957
Jul
88.1 mm (3.5 in)
10 July 1952
Aug
76.7 mm (3.0 in)
29 August 1949
Sep
73.4 mm (2.9 in)
30 September 1924
Oct
91.7 mm (3.6 in)
6 October 1932
Nov
87.1 mm (3.4 in)
18 November 1918
Dec
50.8 mm (2.0 in)
14 December 1920
Period of Record Coverage
1906 to 1976
Complete yearUnder 90 percent of days
71 years of record at Macdonald College, 1906 to 1976. 5 years have data for under 90 percent of days and are left out of rankings: 1906, 1907, 1908, 1951, 1976.
Cooler than the station meanWarmer than the station mean
One stripe for each of 64 complete years at Macdonald College, 1909 to 1975. Blue stripes are years cooler than the station's own mean of 6.0 C (42.8 F); red stripes are warmer. The coolest year was 1917, at 3.7 C (38.7 F), and the warmest was 1949, at 7.6 C (45.6 F). The strongest colour marks a difference of 2.4 C (4.3 F).
Annual mean temperature at Macdonald College as warming stripes, 1909 to 1975
Year
Annual mean temperature
Difference from the station mean
1909
5.6 C
-0.44 C
1910
6.0 C
0.00 C
1911
6.0 C
+0.02 C
1912
4.8 C
-1.20 C
1913
6.6 C
+0.59 C
1914
4.8 C
-1.22 C
1915
7.0 C
+0.98 C
1916
5.7 C
-0.31 C
1917
3.7 C
-2.30 C
1918
5.2 C
-0.84 C
1919
5.4 C
-0.57 C
1920
5.6 C
-0.39 C
1922
6.0 C
-0.04 C
1923
5.0 C
-1.00 C
1924
5.3 C
-0.76 C
1925
5.4 C
-0.57 C
1926
4.4 C
-1.58 C
1927
6.3 C
+0.31 C
1928
5.7 C
-0.30 C
1929
5.3 C
-0.69 C
1930
6.6 C
+0.56 C
1931
7.1 C
+1.12 C
1932
5.7 C
-0.27 C
1933
6.1 C
+0.05 C
1934
5.1 C
-0.89 C
1935
5.4 C
-0.66 C
1936
5.4 C
-0.66 C
1937
6.8 C
+0.74 C
1938
6.5 C
+0.44 C
1939
5.5 C
-0.48 C
1940
5.4 C
-0.65 C
1941
6.7 C
+0.64 C
1942
6.7 C
+0.64 C
1943
5.2 C
-0.83 C
1944
6.3 C
+0.25 C
1945
6.3 C
+0.29 C
1946
6.6 C
+0.54 C
1947
6.3 C
+0.24 C
1948
6.6 C
+0.57 C
1949
7.6 C
+1.56 C
1950
6.1 C
+0.13 C
1952
6.7 C
+0.72 C
1953
6.6 C
+0.62 C
1954
5.9 C
-0.16 C
1955
6.8 C
+0.77 C
1956
5.9 C
-0.08 C
1957
6.8 C
+0.82 C
1958
5.7 C
-0.28 C
1959
6.5 C
+0.51 C
1960
6.5 C
+0.47 C
1961
6.4 C
+0.42 C
1962
5.5 C
-0.54 C
1963
5.6 C
-0.38 C
1964
6.8 C
+0.74 C
1965
6.1 C
+0.12 C
1966
6.6 C
+0.55 C
1968
6.1 C
+0.06 C
1969
6.6 C
+0.62 C
1970
6.2 C
+0.14 C
1971
6.2 C
+0.17 C
1972
5.4 C
-0.65 C
1973
7.3 C
+1.29 C
1974
6.0 C
+0.02 C
1975
7.1 C
+1.09 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1909 to 1975. In Fahrenheit: 0.3 F (0.1 to 0.4) per decade. The slope is a straight line fitted to 64 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Macdonald College
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (0.1 to 0.2) per decade
0.3 F (0.1 to 0.4) per decade
1909 to 1975
64
Rise
Mean daily maximum
0.2 C (0.1 to 0.3) per decade
0.3 F (0.1 to 0.5) per decade
1909 to 1975
64
Rise
Mean daily minimum
0.2 C (0.1 to 0.3) per decade
0.3 F (0.1 to 0.5) per decade
1909 to 1975
64
Rise
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
1906 to 1976
Yearly extremes at Macdonald College: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
36.7 C (98.1 F)
1911
32.8 C (91.0 F)
71
Coldest night (TNn)
-38.3 C (-36.9 F)
1957
-30.0 C (-22.0 F)
71
Wettest day (Rx1day)
91.7 mm (3.6 in)
1932
42.4 mm (1.7 in)
71
Wettest five days (Rx5day)
123.3 mm (4.9 in)
1918
66.3 mm (2.6 in)
71
Longest dry spell (CDD)
34 days
1957
15 days
71
Hottest day (TXx)
The hottest day of the year at Macdonald College, 1906 to 1976. The record is 36.7 C (98.1 F) in 1911, marked on the chart; the median year is 32.8 C (91.0 F).
Hottest day (TXx) at Macdonald College by year
Year
Hottest day (TXx)
1906
31.1 C (88.0 F)
1907
33.3 C (91.9 F)
1908
36.1 C (97.0 F)
1909
33.3 C (91.9 F)
1910
33.3 C (91.9 F)
1911
36.7 C (98.1 F)
1912
35.0 C (95.0 F)
1913
35.0 C (95.0 F)
1914
32.8 C (91.0 F)
1915
32.2 C (90.0 F)
1916
34.4 C (93.9 F)
1917
35.6 C (96.1 F)
1918
33.3 C (91.9 F)
1919
33.3 C (91.9 F)
1920
32.2 C (90.0 F)
1921
35.6 C (96.1 F)
1922
31.7 C (89.1 F)
1923
32.8 C (91.0 F)
1924
30.6 C (87.1 F)
1925
33.3 C (91.9 F)
1926
30.0 C (86.0 F)
1927
29.4 C (84.9 F)
1928
31.1 C (88.0 F)
1929
32.2 C (90.0 F)
1930
32.8 C (91.0 F)
1931
33.3 C (91.9 F)
1932
31.7 C (89.1 F)
1933
34.4 C (93.9 F)
1934
32.8 C (91.0 F)
1935
32.2 C (90.0 F)
1936
31.1 C (88.0 F)
1937
31.7 C (89.1 F)
1938
33.3 C (91.9 F)
1939
32.2 C (90.0 F)
1940
31.1 C (88.0 F)
1941
35.6 C (96.1 F)
1942
35.0 C (95.0 F)
1943
32.8 C (91.0 F)
1944
36.7 C (98.1 F)
1945
32.2 C (90.0 F)
1946
34.4 C (93.9 F)
1947
33.3 C (91.9 F)
1948
34.4 C (93.9 F)
1949
35.0 C (95.0 F)
1950
31.1 C (88.0 F)
1951
28.9 C (84.0 F)
1952
33.3 C (91.9 F)
1953
33.3 C (91.9 F)
1954
30.6 C (87.1 F)
1955
35.0 C (95.0 F)
1956
32.2 C (90.0 F)
1957
34.4 C (93.9 F)
1958
30.6 C (87.1 F)
1959
33.3 C (91.9 F)
1960
31.7 C (89.1 F)
1961
30.6 C (87.1 F)
1962
31.7 C (89.1 F)
1963
33.9 C (93.0 F)
1964
34.4 C (93.9 F)
1965
32.2 C (90.0 F)
1966
33.9 C (93.0 F)
1967
31.7 C (89.1 F)
1968
33.3 C (91.9 F)
1969
33.3 C (91.9 F)
1970
32.8 C (91.0 F)
1971
33.9 C (93.0 F)
1972
32.8 C (91.0 F)
1973
32.2 C (90.0 F)
1974
31.7 C (89.1 F)
1975
36.1 C (97.0 F)
1976
15.0 C (59.0 F)
Coldest night (TNn)
The coldest night of the year at Macdonald College, 1906 to 1976. The record is -38.3 C (-36.9 F) in 1957, marked on the chart; the median year is -30.0 C (-22.0 F).
Coldest night (TNn) at Macdonald College by year
Year
Coldest night (TNn)
1906
-27.8 C (-18.0 F)
1907
-33.9 C (-29.0 F)
1908
-36.7 C (-34.1 F)
1909
-31.1 C (-24.0 F)
1910
-30.0 C (-22.0 F)
1911
-30.0 C (-22.0 F)
1912
-31.7 C (-25.1 F)
1913
-23.9 C (-11.0 F)
1914
-33.9 C (-29.0 F)
1915
-29.4 C (-20.9 F)
1916
-27.8 C (-18.0 F)
1917
-33.3 C (-27.9 F)
1918
-33.3 C (-27.9 F)
1919
-27.2 C (-17.0 F)
1920
-33.3 C (-27.9 F)
1921
-27.2 C (-17.0 F)
1922
-27.8 C (-18.0 F)
1923
-31.1 C (-24.0 F)
1924
-33.3 C (-27.9 F)
1925
-37.2 C (-35.0 F)
1926
-28.9 C (-20.0 F)
1927
-27.8 C (-18.0 F)
1928
-27.2 C (-17.0 F)
1929
-27.2 C (-17.0 F)
1930
-28.9 C (-20.0 F)
1931
-28.3 C (-18.9 F)
1932
-28.3 C (-18.9 F)
1933
-34.4 C (-29.9 F)
1934
-33.3 C (-27.9 F)
1935
-31.1 C (-24.0 F)
1936
-26.1 C (-15.0 F)
1937
-28.3 C (-18.9 F)
1938
-33.3 C (-27.9 F)
1939
-27.2 C (-17.0 F)
1940
-28.9 C (-20.0 F)
1941
-26.1 C (-15.0 F)
1942
-31.7 C (-25.1 F)
1943
-33.3 C (-27.9 F)
1944
-27.8 C (-18.0 F)
1945
-30.6 C (-23.1 F)
1946
-30.0 C (-22.0 F)
1947
-28.3 C (-18.9 F)
1948
-32.8 C (-27.0 F)
1949
-25.6 C (-14.1 F)
1950
-28.9 C (-20.0 F)
1951
-32.2 C (-26.0 F)
1952
-27.8 C (-18.0 F)
1953
-23.9 C (-11.0 F)
1954
-28.9 C (-20.0 F)
1955
-30.0 C (-22.0 F)
1956
-25.0 C (-13.0 F)
1957
-38.3 C (-36.9 F)
1958
-30.6 C (-23.1 F)
1959
-32.2 C (-26.0 F)
1960
-28.3 C (-18.9 F)
1961
-27.2 C (-17.0 F)
1962
-32.2 C (-26.0 F)
1963
-31.1 C (-24.0 F)
1964
-27.8 C (-18.0 F)
1965
-28.3 C (-18.9 F)
1966
-30.0 C (-22.0 F)
1967
-31.1 C (-24.0 F)
1968
-30.6 C (-23.1 F)
1969
-25.0 C (-13.0 F)
1970
-27.8 C (-18.0 F)
1971
-33.3 C (-27.9 F)
1972
-32.8 C (-27.0 F)
1973
-30.0 C (-22.0 F)
1974
-30.6 C (-23.1 F)
1975
-30.0 C (-22.0 F)
1976
-33.3 C (-27.9 F)
Wettest day (Rx1day)
The wettest day of the year at Macdonald College, 1906 to 1976. The record is 91.7 mm (3.6 in) in 1932, marked on the chart; the median year is 42.4 mm (1.7 in).
Wettest day (Rx1day) at Macdonald College by year
Year
Wettest day (Rx1day)
1906
24.6 mm (1.0 in)
1907
31.2 mm (1.2 in)
1908
27.4 mm (1.1 in)
1909
38.4 mm (1.5 in)
1910
42.4 mm (1.7 in)
1911
47.8 mm (1.9 in)
1912
39.9 mm (1.6 in)
1913
30.2 mm (1.2 in)
1914
33.0 mm (1.3 in)
1915
34.5 mm (1.4 in)
1916
46.7 mm (1.8 in)
1917
46.5 mm (1.8 in)
1918
87.1 mm (3.4 in)
1919
44.5 mm (1.8 in)
1920
50.8 mm (2.0 in)
1921
43.2 mm (1.7 in)
1922
40.1 mm (1.6 in)
1923
55.4 mm (2.2 in)
1924
73.4 mm (2.9 in)
1925
37.3 mm (1.5 in)
1926
38.9 mm (1.5 in)
1927
52.6 mm (2.1 in)
1928
38.9 mm (1.5 in)
1929
57.7 mm (2.3 in)
1930
40.9 mm (1.6 in)
1931
44.5 mm (1.8 in)
1932
91.7 mm (3.6 in)
1933
45.2 mm (1.8 in)
1934
58.2 mm (2.3 in)
1935
32.3 mm (1.3 in)
1936
29.5 mm (1.2 in)
1937
46.7 mm (1.8 in)
1938
42.7 mm (1.7 in)
1939
33.8 mm (1.3 in)
1940
61.7 mm (2.4 in)
1941
36.6 mm (1.4 in)
1942
56.4 mm (2.2 in)
1943
54.9 mm (2.2 in)
1944
30.5 mm (1.2 in)
1945
49.8 mm (2.0 in)
1946
47.0 mm (1.9 in)
1947
54.6 mm (2.1 in)
1948
43.7 mm (1.7 in)
1949
76.7 mm (3.0 in)
1950
31.5 mm (1.2 in)
1951
36.6 mm (1.4 in)
1952
88.1 mm (3.5 in)
1953
36.8 mm (1.4 in)
1954
40.6 mm (1.6 in)
1955
35.6 mm (1.4 in)
1956
76.7 mm (3.0 in)
1957
74.9 mm (2.9 in)
1958
38.1 mm (1.5 in)
1959
40.6 mm (1.6 in)
1960
49.0 mm (1.9 in)
1961
46.7 mm (1.8 in)
1962
43.9 mm (1.7 in)
1963
65.5 mm (2.6 in)
1964
37.6 mm (1.5 in)
1965
37.8 mm (1.5 in)
1966
38.1 mm (1.5 in)
1967
37.3 mm (1.5 in)
1968
35.8 mm (1.4 in)
1969
46.2 mm (1.8 in)
1970
34.5 mm (1.4 in)
1971
69.9 mm (2.8 in)
1972
40.9 mm (1.6 in)
1973
40.6 mm (1.6 in)
1974
36.8 mm (1.4 in)
1975
70.6 mm (2.8 in)
1976
25.4 mm (1.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Macdonald College, 1906 to 1976. The record is 123.3 mm (4.9 in) in 1918, marked on the chart; the median year is 66.3 mm (2.6 in).
Wettest five days (Rx5day) at Macdonald College by year
Year
Wettest five days (Rx5day)
1906
39.7 mm (1.6 in)
1907
59.9 mm (2.4 in)
1908
57.4 mm (2.3 in)
1909
57.2 mm (2.3 in)
1910
54.4 mm (2.1 in)
1911
52.6 mm (2.1 in)
1912
58.8 mm (2.3 in)
1913
47.2 mm (1.9 in)
1914
76.6 mm (3.0 in)
1915
70.0 mm (2.8 in)
1916
79.4 mm (3.1 in)
1917
83.8 mm (3.3 in)
1918
123.3 mm (4.9 in)
1919
66.3 mm (2.6 in)
1920
66.8 mm (2.6 in)
1921
48.8 mm (1.9 in)
1922
61.5 mm (2.4 in)
1923
63.3 mm (2.5 in)
1924
115.1 mm (4.5 in)
1925
89.7 mm (3.5 in)
1926
72.9 mm (2.9 in)
1927
95.3 mm (3.8 in)
1928
87.1 mm (3.4 in)
1929
102.2 mm (4.0 in)
1930
77.8 mm (3.1 in)
1931
78.5 mm (3.1 in)
1932
117.1 mm (4.6 in)
1933
73.6 mm (2.9 in)
1934
81.0 mm (3.2 in)
1935
48.5 mm (1.9 in)
1936
47.4 mm (1.9 in)
1937
57.3 mm (2.3 in)
1938
63.8 mm (2.5 in)
1939
38.1 mm (1.5 in)
1940
70.3 mm (2.8 in)
1941
52.3 mm (2.1 in)
1942
64.1 mm (2.5 in)
1943
91.9 mm (3.6 in)
1944
63.6 mm (2.5 in)
1945
84.6 mm (3.3 in)
1946
94.7 mm (3.7 in)
1947
72.6 mm (2.9 in)
1948
67.1 mm (2.6 in)
1949
83.3 mm (3.3 in)
1950
57.9 mm (2.3 in)
1951
71.7 mm (2.8 in)
1952
106.1 mm (4.2 in)
1953
59.2 mm (2.3 in)
1954
72.9 mm (2.9 in)
1955
66.0 mm (2.6 in)
1956
107.5 mm (4.2 in)
1957
95.7 mm (3.8 in)
1958
74.1 mm (2.9 in)
1959
51.3 mm (2.0 in)
1960
58.7 mm (2.3 in)
1961
64.2 mm (2.5 in)
1962
60.2 mm (2.4 in)
1963
82.1 mm (3.2 in)
1964
52.5 mm (2.1 in)
1965
64.5 mm (2.5 in)
1966
50.1 mm (2.0 in)
1967
39.3 mm (1.5 in)
1968
73.4 mm (2.9 in)
1969
59.2 mm (2.3 in)
1970
49.9 mm (2.0 in)
1971
82.1 mm (3.2 in)
1972
71.0 mm (2.8 in)
1973
54.4 mm (2.1 in)
1974
58.6 mm (2.3 in)
1975
89.2 mm (3.5 in)
1976
29.3 mm (1.2 in)
Longest dry spell (CDD)
The longest dry spell of the year at Macdonald College, 1906 to 1976. The record is 34 days in 1957, marked on the chart; the median year is 15 days.
Longest dry spell (CDD) at Macdonald College by year
Year
Longest dry spell (CDD)
1906
10 days
1907
14 days
1908
13 days
1909
21 days
1910
12 days
1911
13 days
1912
19 days
1913
26 days
1914
16 days
1915
22 days
1916
22 days
1917
18 days
1918
17 days
1919
16 days
1920
13 days
1921
22 days
1922
15 days
1923
14 days
1924
17 days
1925
21 days
1926
12 days
1927
21 days
1928
14 days
1929
14 days
1930
18 days
1931
18 days
1932
19 days
1933
11 days
1934
14 days
1935
17 days
1936
12 days
1937
14 days
1938
12 days
1939
20 days
1940
16 days
1941
31 days
1942
15 days
1943
14 days
1944
14 days
1945
10 days
1946
10 days
1947
21 days
1948
16 days
1949
12 days
1950
11 days
1951
15 days
1952
12 days
1953
22 days
1954
12 days
1955
22 days
1956
31 days
1957
34 days
1958
10 days
1959
13 days
1960
15 days
1961
25 days
1962
16 days
1963
19 days
1964
15 days
1965
18 days
1966
15 days
1967
17 days
1968
17 days
1969
11 days
1970
17 days
1971
11 days
1972
11 days
1973
16 days
1974
15 days
1975
17 days
1976
13 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
64 years with a frost
Across 64 years with a frost, the median last spring frost at Macdonald College falls on 4 May and the median first autumn frost on 6 October, which leaves a median of 153 days between them.
In 1944 to 1975 the median growing season was 151 days. That is 3 days fewer than in 1909 to 1939.
Fitted over all years, the growing season changes by +0.2 days per decade at this station.
Frost dates and growing season at Macdonald College
Measure
Median, all years
Earliest period (1909 to 1939)
Recent period (1944 to 1975)
Recent against earliest
Fitted trend
Last spring frost
4 May
2 May
8 May
6 days later
+0.4 days per decade
First autumn frost
6 October
5 October
6 October
1 day later
+0.6 days per decade
Growing days
153 days
154 days
151 days
3 days fewer
+0.2 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.
Rainfall Return Levels
58 years, 1915 to 1974
A day with at least 43.7 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 109.4 mm (4.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Macdonald College: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
43.7 mm (1.7 in)
5 years
55.9 mm (2.2 in)
10 years
65.7 mm (2.6 in)
25 years
80.7 mm (3.2 in)
50 years
94.0 mm (3.7 in)
100 years
109.4 mm (4.3 in)
Longer than the 58 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, 58 years of values from 1915 to 1974.
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: 91.7 mm (3.6 in) in 1932; 88.1 mm (3.5 in) in 1952; 87.1 mm (3.4 in) in 1918.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Macdonald College, at 1952. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1952 ran 0.4 C (0.7 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Macdonald College, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1952
-0.4
-0.7
likely
5
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Download the Data
Data for Macdonald College standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Macdonald College 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.