Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Muskoka A. 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 Muskoka A, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
13.9 C (57.0 F)
-39.8 C (-39.6 F)
n/a
n/a
Feb
10.6 C (51.1 F)
-41.5 C (-42.7 F)
n/a
n/a
Mar
25.6 C (78.1 F)
-34.3 C (-29.7 F)
n/a
n/a
Apr
28.9 C (84.0 F)
-21.1 C (-6.0 F)
n/a
n/a
May
31.7 C (89.1 F)
-7.8 C (18.0 F)
n/a
n/a
Jun
35.0 C (95.0 F)
-2.2 C (28.0 F)
n/a
n/a
Jul
33.9 C (93.0 F)
1.7 C (35.1 F)
n/a
n/a
Aug
35.0 C (95.0 F)
-1.1 C (30.0 F)
n/a
n/a
Sep
34.4 C (93.9 F)
-5.0 C (23.0 F)
n/a
n/a
Oct
27.8 C (82.0 F)
-11.1 C (12.0 F)
n/a
n/a
Nov
24.4 C (75.9 F)
-22.2 C (-8.0 F)
n/a
n/a
Dec
18.8 C (65.8 F)
-41.1 C (-42.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Muskoka A still stand. 1946 holds the most, with 57.
Standing records at Muskoka A by the year they were set
Year set
Standing records
1939
28
1940
40
1941
35
1942
31
1943
43
1944
28
1945
46
1946
57
1947
50
1948
32
1949
55
1950
47
1951
33
1952
27
1953
36
1954
32
1955
35
1956
36
1957
37
1958
27
1959
43
1960
17
1961
20
1962
28
1963
27
1964
35
1965
46
1966
32
1967
24
1968
32
1969
14
1970
25
1971
22
1972
29
1973
16
1974
25
1975
31
1976
37
1977
32
1978
18
1979
33
1980
23
1981
37
1982
34
1983
29
All-Time Record Progression
3 new records
3 all-time records were set at Muskoka A between 25 February 1965 and 11 January 1981. Each dot is a new record.
When Muskoka A set new all-time records
Date
Kind
Detail
1965-02-25
Record daily snowfall
Record daily snowfall 53.3 cm (21.0 in)
1979-02-11
Record low minimum temperature
Record low minimum temperature -41.5 C (-42.7 F)
1981-01-11
Record low maximum temperature
Record low maximum temperature -24.0 C (-11.2 F)
Wettest Day of Each Month
Jun: 115.1 mm (4.5 in)
The wettest day on record for each calendar month at Muskoka A. The most was 115.1 mm (4.5 in) on 23 June 1944.
Record daily precipitation for each month at Muskoka A
Month
Record daily precipitation (mm)
Date
Jan
35.1 mm (1.4 in)
27 January 1961
Feb
49.8 mm (2.0 in)
25 February 1965
Mar
44.0 mm (1.7 in)
21 March 1980
Apr
43.2 mm (1.7 in)
27 April 1956
May
40.6 mm (1.6 in)
15 May 1939
Jun
115.1 mm (4.5 in)
23 June 1944
Jul
77.0 mm (3.0 in)
14 July 1935
Aug
52.3 mm (2.1 in)
30 August 1940
Sep
59.2 mm (2.3 in)
26 September 1942
Oct
84.3 mm (3.3 in)
15 October 1954
Nov
39.4 mm (1.6 in)
10 November 1962
Dec
49.3 mm (1.9 in)
4 December 1961
Period of Record Coverage
1938 to 1983
Complete yearUnder 90 percent of days
46 years of record at Muskoka A, 1938 to 1983. 1 years have data for under 90 percent of days and are left out of rankings: 1938.
Cooler than the station meanWarmer than the station mean
One stripe for each of 44 complete years at Muskoka A, 1939 to 1983. Blue stripes are years cooler than the station's own mean of 4.9 C (40.8 F); red stripes are warmer. The coolest year was 1972, at 3.6 C (38.6 F), and the warmest was 1953, at 6.5 C (43.7 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Muskoka A as warming stripes, 1939 to 1983
Year
Annual mean temperature
Difference from the station mean
1939
4.9 C
-0.03 C
1940
4.2 C
-0.76 C
1941
5.4 C
+0.46 C
1942
5.1 C
+0.19 C
1943
4.0 C
-0.91 C
1944
5.3 C
+0.41 C
1945
4.9 C
-0.05 C
1946
5.7 C
+0.74 C
1947
5.1 C
+0.18 C
1948
5.5 C
+0.57 C
1949
6.2 C
+1.25 C
1950
4.6 C
-0.27 C
1951
5.2 C
+0.26 C
1952
6.0 C
+1.09 C
1953
6.5 C
+1.61 C
1954
5.1 C
+0.15 C
1955
5.7 C
+0.75 C
1956
4.5 C
-0.46 C
1957
5.2 C
+0.30 C
1958
4.7 C
-0.19 C
1959
5.1 C
+0.21 C
1960
5.2 C
+0.26 C
1961
5.3 C
+0.38 C
1962
4.7 C
-0.18 C
1963
4.2 C
-0.69 C
1964
5.3 C
+0.36 C
1965
4.3 C
-0.61 C
1966
4.6 C
-0.29 C
1967
4.4 C
-0.56 C
1968
4.8 C
-0.15 C
1969
4.7 C
-0.17 C
1970
4.3 C
-0.61 C
1971
4.6 C
-0.33 C
1972
3.6 C
-1.27 C
1973
5.7 C
+0.81 C
1974
4.3 C
-0.61 C
1975
5.2 C
+0.29 C
1976
3.9 C
-1.05 C
1977
4.7 C
-0.17 C
1978
3.6 C
-1.27 C
1980
4.1 C
-0.86 C
1981
5.3 C
+0.34 C
1982
5.0 C
+0.09 C
1983
5.7 C
+0.75 C
The fitted trend in annual mean temperature here over 1939 to 1983 is -0.15 C (-0.30 to 0.00) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.27 F (-0.53 to 0.00) 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 Muskoka A
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.15 C (-0.30 to 0.00) per decade
-0.27 F (-0.53 to 0.00) per decade
1939 to 1983
44
Not clearly different from zero
Mean daily maximum
-0.1 C (-0.2 to 0.1) per decade
-0.2 F (-0.4 to 0.1) per decade
1939 to 1983
44
Not clearly different from zero
Mean daily minimum
-0.20 C (-0.36 to -0.03) per decade
-0.4 F (-0.7 to -0.1) per decade
1939 to 1983
44
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
1934 to 1983
Yearly extremes at Muskoka A: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
35.0 C (95.0 F)
1944
31.7 C (89.1 F)
46
Coldest night (TNn)
-41.5 C (-42.7 F)
1979
-34.4 C (-29.9 F)
46
Wettest day (Rx1day)
115.1 mm (4.5 in)
1944
44.0 mm (1.7 in)
50
Wettest five days (Rx5day)
136.9 mm (5.4 in)
1954
70.8 mm (2.8 in)
50
Longest dry spell (CDD)
25 days
1949
15 days
50
Hottest day (TXx)
The hottest day of the year at Muskoka A, 1934 to 1983. The record is 35.0 C (95.0 F) in 1944, marked on the chart; the median year is 31.7 C (89.1 F).
Hottest day (TXx) at Muskoka A by year
Year
Hottest day (TXx)
1934
n/a
1935
n/a
1936
n/a
1937
n/a
1938
5.6 C (42.1 F)
1939
32.2 C (90.0 F)
1940
30.0 C (86.0 F)
1941
33.3 C (91.9 F)
1942
32.8 C (91.0 F)
1943
31.1 C (88.0 F)
1944
35.0 C (95.0 F)
1945
30.6 C (87.1 F)
1946
32.2 C (90.0 F)
1947
33.3 C (91.9 F)
1948
33.3 C (91.9 F)
1949
32.8 C (91.0 F)
1950
30.0 C (86.0 F)
1951
28.9 C (84.0 F)
1952
32.2 C (90.0 F)
1953
34.4 C (93.9 F)
1954
28.3 C (82.9 F)
1955
33.9 C (93.0 F)
1956
30.6 C (87.1 F)
1957
30.6 C (87.1 F)
1958
30.0 C (86.0 F)
1959
32.8 C (91.0 F)
1960
32.8 C (91.0 F)
1961
31.1 C (88.0 F)
1962
33.3 C (91.9 F)
1963
32.2 C (90.0 F)
1964
32.8 C (91.0 F)
1965
32.2 C (90.0 F)
1966
32.8 C (91.0 F)
1967
29.4 C (84.9 F)
1968
32.2 C (90.0 F)
1969
31.1 C (88.0 F)
1970
30.6 C (87.1 F)
1971
31.1 C (88.0 F)
1972
31.7 C (89.1 F)
1973
30.6 C (87.1 F)
1974
30.0 C (86.0 F)
1975
32.8 C (91.0 F)
1976
30.6 C (87.1 F)
1977
32.2 C (90.0 F)
1978
31.7 C (89.1 F)
1979
31.7 C (89.1 F)
1980
28.8 C (83.8 F)
1981
30.2 C (86.4 F)
1982
31.2 C (88.2 F)
1983
31.8 C (89.2 F)
Coldest night (TNn)
The coldest night of the year at Muskoka A, 1934 to 1983. The record is -41.5 C (-42.7 F) in 1979, marked on the chart; the median year is -34.4 C (-29.9 F).
Coldest night (TNn) at Muskoka A by year
Year
Coldest night (TNn)
1934
n/a
1935
n/a
1936
n/a
1937
n/a
1938
-27.8 C (-18.0 F)
1939
-36.7 C (-34.1 F)
1940
-31.7 C (-25.1 F)
1941
-30.6 C (-23.1 F)
1942
-41.1 C (-42.0 F)
1943
-39.4 C (-38.9 F)
1944
-30.0 C (-22.0 F)
1945
-38.3 C (-36.9 F)
1946
-33.9 C (-29.0 F)
1947
-37.8 C (-36.0 F)
1948
-36.7 C (-34.1 F)
1949
-29.4 C (-20.9 F)
1950
-32.2 C (-26.0 F)
1951
-38.9 C (-38.0 F)
1952
-34.4 C (-29.9 F)
1953
-27.8 C (-18.0 F)
1954
-31.7 C (-25.1 F)
1955
-34.4 C (-29.9 F)
1956
-28.3 C (-18.9 F)
1957
-32.2 C (-26.0 F)
1958
-33.3 C (-27.9 F)
1959
-35.6 C (-32.1 F)
1960
-33.9 C (-29.0 F)
1961
-33.3 C (-27.9 F)
1962
-33.9 C (-29.0 F)
1963
-34.4 C (-29.9 F)
1964
-32.8 C (-27.0 F)
1965
-36.1 C (-33.0 F)
1966
-33.9 C (-29.0 F)
1967
-35.6 C (-32.1 F)
1968
-35.0 C (-31.0 F)
1969
-30.6 C (-23.1 F)
1970
-37.2 C (-35.0 F)
1971
-36.7 C (-34.1 F)
1972
-39.4 C (-38.9 F)
1973
-36.1 C (-33.0 F)
1974
-31.1 C (-24.0 F)
1975
-33.9 C (-29.0 F)
1976
-38.3 C (-36.9 F)
1977
-39.8 C (-39.6 F)
1978
-31.6 C (-24.9 F)
1979
-41.5 C (-42.7 F)
1980
-38.4 C (-37.1 F)
1981
-37.9 C (-36.2 F)
1982
-39.2 C (-38.6 F)
1983
-35.2 C (-31.4 F)
Wettest day (Rx1day)
The wettest day of the year at Muskoka A, 1934 to 1983. The record is 115.1 mm (4.5 in) in 1944, marked on the chart; the median year is 44.0 mm (1.7 in).
Wettest day (Rx1day) at Muskoka A by year
Year
Wettest day (Rx1day)
1934
28.4 mm (1.1 in)
1935
77.0 mm (3.0 in)
1936
43.9 mm (1.7 in)
1937
36.8 mm (1.4 in)
1938
21.1 mm (0.8 in)
1939
40.6 mm (1.6 in)
1940
52.3 mm (2.1 in)
1941
55.1 mm (2.2 in)
1942
59.2 mm (2.3 in)
1943
74.2 mm (2.9 in)
1944
115.1 mm (4.5 in)
1945
49.3 mm (1.9 in)
1946
23.6 mm (0.9 in)
1947
49.0 mm (1.9 in)
1948
47.2 mm (1.9 in)
1949
45.5 mm (1.8 in)
1950
38.9 mm (1.5 in)
1951
72.1 mm (2.8 in)
1952
51.6 mm (2.0 in)
1953
40.4 mm (1.6 in)
1954
84.3 mm (3.3 in)
1955
41.9 mm (1.6 in)
1956
43.2 mm (1.7 in)
1957
62.5 mm (2.5 in)
1958
49.0 mm (1.9 in)
1959
31.2 mm (1.2 in)
1960
50.0 mm (2.0 in)
1961
49.3 mm (1.9 in)
1962
41.1 mm (1.6 in)
1963
57.7 mm (2.3 in)
1964
32.3 mm (1.3 in)
1965
49.8 mm (2.0 in)
1966
33.3 mm (1.3 in)
1967
48.8 mm (1.9 in)
1968
39.1 mm (1.5 in)
1969
90.9 mm (3.6 in)
1970
39.1 mm (1.5 in)
1971
40.1 mm (1.6 in)
1972
29.7 mm (1.2 in)
1973
52.6 mm (2.1 in)
1974
33.5 mm (1.3 in)
1975
44.5 mm (1.8 in)
1976
25.4 mm (1.0 in)
1977
33.6 mm (1.3 in)
1978
34.4 mm (1.4 in)
1979
30.9 mm (1.2 in)
1980
44.0 mm (1.7 in)
1981
41.1 mm (1.6 in)
1982
52.8 mm (2.1 in)
1983
39.0 mm (1.5 in)
Wettest five days (Rx5day)
The wettest five days of the year at Muskoka A, 1934 to 1983. The record is 136.9 mm (5.4 in) in 1954, marked on the chart; the median year is 70.8 mm (2.8 in).
Wettest five days (Rx5day) at Muskoka A by year
Year
Wettest five days (Rx5day)
1934
42.2 mm (1.7 in)
1935
116.1 mm (4.6 in)
1936
99.1 mm (3.9 in)
1937
60.9 mm (2.4 in)
1938
48.9 mm (1.9 in)
1939
66.6 mm (2.6 in)
1940
70.1 mm (2.8 in)
1941
96.0 mm (3.8 in)
1942
107.0 mm (4.2 in)
1943
92.5 mm (3.6 in)
1944
120.7 mm (4.8 in)
1945
58.6 mm (2.3 in)
1946
70.2 mm (2.8 in)
1947
73.2 mm (2.9 in)
1948
96.5 mm (3.8 in)
1949
61.7 mm (2.4 in)
1950
73.2 mm (2.9 in)
1951
78.4 mm (3.1 in)
1952
66.4 mm (2.6 in)
1953
75.9 mm (3.0 in)
1954
136.9 mm (5.4 in)
1955
87.0 mm (3.4 in)
1956
71.9 mm (2.8 in)
1957
105.6 mm (4.2 in)
1958
69.1 mm (2.7 in)
1959
68.4 mm (2.7 in)
1960
86.9 mm (3.4 in)
1961
71.4 mm (2.8 in)
1962
50.5 mm (2.0 in)
1963
77.5 mm (3.1 in)
1964
62.0 mm (2.4 in)
1965
64.4 mm (2.5 in)
1966
72.2 mm (2.8 in)
1967
76.0 mm (3.0 in)
1968
67.3 mm (2.6 in)
1969
117.6 mm (4.6 in)
1970
54.9 mm (2.2 in)
1971
51.8 mm (2.0 in)
1972
55.7 mm (2.2 in)
1973
68.9 mm (2.7 in)
1974
61.4 mm (2.4 in)
1975
90.0 mm (3.5 in)
1976
59.7 mm (2.4 in)
1977
48.8 mm (1.9 in)
1978
51.8 mm (2.0 in)
1979
69.2 mm (2.7 in)
1980
85.9 mm (3.4 in)
1981
67.4 mm (2.7 in)
1982
88.2 mm (3.5 in)
1983
73.5 mm (2.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Muskoka A, 1934 to 1983. The record is 25 days in 1949, marked on the chart; the median year is 15 days.
Longest dry spell (CDD) at Muskoka A by year
Year
Longest dry spell (CDD)
1934
10 days
1935
17 days
1936
9 days
1937
12 days
1938
9 days
1939
18 days
1940
11 days
1941
18 days
1942
16 days
1943
16 days
1944
19 days
1945
21 days
1946
17 days
1947
13 days
1948
14 days
1949
25 days
1950
14 days
1951
17 days
1952
14 days
1953
13 days
1954
12 days
1955
15 days
1956
17 days
1957
24 days
1958
20 days
1959
10 days
1960
11 days
1961
14 days
1962
23 days
1963
18 days
1964
12 days
1965
14 days
1966
19 days
1967
21 days
1968
13 days
1969
16 days
1970
17 days
1971
9 days
1972
12 days
1973
14 days
1974
21 days
1975
13 days
1976
12 days
1977
22 days
1978
15 days
1979
12 days
1980
14 days
1981
16 days
1982
15 days
1983
19 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 Muskoka A falls on 27 May and the median first autumn frost on 15 September, which leaves a median of 116 days between them.
Fitted over all years, the growing season changes by +3.6 days per decade at this station.
Frost dates and growing season at Muskoka A
Measure
Median, all years
Earliest period
Recent period (1953 to 1983)
Recent against earliest
Fitted trend
Last spring frost
27 May
n/a
26 May
n/a
-1.4 days per decade
First autumn frost
15 September
n/a
17 September
n/a
+2.2 days per decade
Growing days
116 days
n/a
117 days
n/a
+3.6 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
47 years, 1935 to 1983
A day with at least 44.1 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 114.3 mm (4.5 in) of rain is expected about once in 100 years.
Rainfall return levels at Muskoka A: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
44.1 mm (1.7 in)
5 years
58.6 mm (2.3 in)
10 years
69.7 mm (2.7 in)
25 years
85.7 mm (3.4 in)
50 years
99.3 mm (3.9 in)
Longer than the 47 years of record
100 years
114.3 mm (4.5 in)
Longer than the 47 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, 47 years of values from 1935 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: 115.1 mm (4.5 in) in 1944; 90.9 mm (3.6 in) in 1969; 84.3 mm (3.3 in) in 1954.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Muskoka A, at 1968. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1968 ran 0.2 C (0.3 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Muskoka A, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1968
-0.2
-0.3
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 Muskoka A standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Muskoka A 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.