Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Algonquin Park. 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 Algonquin Park, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
11.7 C (53.1 F)
-40.6 C (-41.1 F)
n/a
n/a
Feb
14.4 C (57.9 F)
-45.0 C (-49.0 F)
n/a
n/a
Mar
19.4 C (66.9 F)
-41.1 C (-42.0 F)
n/a
n/a
Apr
27.2 C (81.0 F)
-29.4 C (-20.9 F)
n/a
n/a
May
32.2 C (90.0 F)
-8.9 C (16.0 F)
n/a
n/a
Jun
35.0 C (95.0 F)
-1.7 C (28.9 F)
n/a
n/a
Jul
38.3 C (100.9 F)
-0.6 C (30.9 F)
n/a
n/a
Aug
34.4 C (93.9 F)
-0.6 C (30.9 F)
n/a
n/a
Sep
35.6 C (96.1 F)
-4.4 C (24.1 F)
n/a
n/a
Oct
28.9 C (84.0 F)
-12.8 C (9.0 F)
n/a
n/a
Nov
21.7 C (71.1 F)
-28.9 C (-20.0 F)
n/a
n/a
Dec
12.8 C (55.0 F)
-45.0 C (-49.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Algonquin Park still stand. 1920 holds the most, with 67.
Standing records at Algonquin Park by the year they were set
Year set
Standing records
1917
36
1918
54
1919
54
1920
67
1921
65
1922
32
1923
36
1924
38
1925
28
1926
30
1927
36
1928
22
1929
25
1930
41
1931
37
1932
31
1933
37
1934
33
1935
22
1936
48
1937
18
1938
33
1939
31
1940
36
1941
25
1942
28
1943
30
1944
32
1945
28
1946
41
1947
48
1948
21
1949
43
1950
31
1951
26
1952
9
1953
28
1954
30
1955
23
1956
31
1957
25
1958
22
1959
38
1960
15
All-Time Record Progression
1 new records
1 all-time records were set at Algonquin Park between 13 August 1947 and 13 August 1947. Each dot is a new record.
When Algonquin Park set new all-time records
Date
Kind
Detail
1947-08-13
Record high minimum temperature
Record high minimum temperature 24.4 C (75.9 F)
Wettest Day of Each Month
Aug: 104.1 mm (4.1 in)
The wettest day on record for each calendar month at Algonquin Park. The most was 104.1 mm (4.1 in) on 21 August 1920.
Record daily precipitation for each month at Algonquin Park
Month
Record daily precipitation (mm)
Date
Jan
43.7 mm (1.7 in)
12 January 1932
Feb
66.0 mm (2.6 in)
22 February 1930
Mar
38.1 mm (1.5 in)
20 March 1921
Apr
44.5 mm (1.8 in)
10 April 1947
May
45.7 mm (1.8 in)
13 May 1956
Jun
59.2 mm (2.3 in)
24 June 1956
Jul
54.1 mm (2.1 in)
12 July 1944
Aug
104.1 mm (4.1 in)
21 August 1920
Sep
57.2 mm (2.3 in)
22 September 1938
Oct
49.8 mm (2.0 in)
13 October 1927
Nov
36.1 mm (1.4 in)
13 November 1959
Dec
45.7 mm (1.8 in)
17 December 1921
Period of Record Coverage
1917 to 1960
Complete yearUnder 90 percent of days
44 years of record at Algonquin Park, 1917 to 1960. 3 years have data for under 90 percent of days and are left out of rankings: 1917, 1949, 1960.
Cooler than the station meanWarmer than the station mean
One stripe for each of 39 complete years at Algonquin Park, 1918 to 1959. Blue stripes are years cooler than the station's own mean of 3.7 C (38.6 F); red stripes are warmer. The coolest year was 1924, at 1.9 C (35.4 F), and the warmest was 1953, at 5.3 C (41.5 F). The strongest colour marks a difference of 1.9 C (3.4 F).
Annual mean temperature at Algonquin Park as warming stripes, 1918 to 1959
Year
Annual mean temperature
Difference from the station mean
1918
3.1 C
-0.57 C
1919
4.0 C
+0.34 C
1920
2.8 C
-0.86 C
1921
4.7 C
+1.04 C
1922
3.5 C
-0.16 C
1923
3.0 C
-0.73 C
1924
1.9 C
-1.82 C
1925
3.5 C
-0.15 C
1926
2.0 C
-1.74 C
1927
3.8 C
+0.13 C
1928
3.4 C
-0.28 C
1929
3.4 C
-0.32 C
1930
4.4 C
+0.72 C
1931
5.2 C
+1.49 C
1932
4.3 C
+0.60 C
1933
3.9 C
+0.17 C
1934
2.9 C
-0.80 C
1935
3.2 C
-0.48 C
1936
3.1 C
-0.61 C
1937
4.2 C
+0.47 C
1938
4.4 C
+0.69 C
1939
3.1 C
-0.55 C
1940
2.5 C
-1.18 C
1941
4.1 C
+0.37 C
1942
4.1 C
+0.40 C
1943
2.6 C
-1.06 C
1944
4.1 C
+0.41 C
1945
4.0 C
+0.31 C
1946
4.7 C
+1.00 C
1948
4.0 C
+0.29 C
1950
3.6 C
-0.07 C
1951
4.1 C
+0.45 C
1952
4.7 C
+1.03 C
1953
5.3 C
+1.60 C
1955
4.3 C
+0.62 C
1956
3.2 C
-0.52 C
1957
4.2 C
+0.52 C
1958
3.1 C
-0.59 C
1959
3.5 C
-0.19 C
The fitted trend in annual mean temperature here over 1918 to 1959 is 0.18 C (-0.03 to 0.39) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.3 F (-0.1 to 0.7) 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 Algonquin Park
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.18 C (-0.03 to 0.39) per decade
0.3 F (-0.1 to 0.7) per decade
1918 to 1959
39
Not clearly different from zero
Mean daily maximum
0.1 C (-0.2 to 0.3) per decade
0.1 F (-0.3 to 0.5) per decade
1918 to 1959
39
Not clearly different from zero
Mean daily minimum
0.3 C (0.1 to 0.5) per decade
0.5 F (0.1 to 0.9) per decade
1918 to 1959
39
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
1917 to 1960
Yearly extremes at Algonquin Park: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
38.3 C (100.9 F)
1931
32.2 C (90.0 F)
44
Coldest night (TNn)
-45.0 C (-49.0 F)
1933
-38.0 C (-36.5 F)
44
Wettest day (Rx1day)
104.1 mm (4.1 in)
1920
38.4 mm (1.5 in)
44
Wettest five days (Rx5day)
141.4 mm (5.6 in)
1957
64.2 mm (2.5 in)
44
Longest dry spell (CDD)
29 days
1934
17 days
44
Hottest day (TXx)
The hottest day of the year at Algonquin Park, 1917 to 1960. The record is 38.3 C (100.9 F) in 1931, marked on the chart; the median year is 32.2 C (90.0 F).
Hottest day (TXx) at Algonquin Park by year
Year
Hottest day (TXx)
1917
33.3 C (91.9 F)
1918
32.8 C (91.0 F)
1919
33.9 C (93.0 F)
1920
30.6 C (87.1 F)
1921
35.6 C (96.1 F)
1922
30.6 C (87.1 F)
1923
30.0 C (86.0 F)
1924
30.0 C (86.0 F)
1925
33.3 C (91.9 F)
1926
30.0 C (86.0 F)
1927
33.9 C (93.0 F)
1928
31.7 C (89.1 F)
1929
32.2 C (90.0 F)
1930
30.6 C (87.1 F)
1931
38.3 C (100.9 F)
1932
31.1 C (88.0 F)
1933
33.9 C (93.0 F)
1934
33.3 C (91.9 F)
1935
32.2 C (90.0 F)
1936
36.1 C (97.0 F)
1937
31.7 C (89.1 F)
1938
33.3 C (91.9 F)
1939
32.2 C (90.0 F)
1940
31.7 C (89.1 F)
1941
33.9 C (93.0 F)
1942
33.9 C (93.0 F)
1943
31.7 C (89.1 F)
1944
35.0 C (95.0 F)
1945
31.7 C (89.1 F)
1946
31.7 C (89.1 F)
1947
33.3 C (91.9 F)
1948
33.3 C (91.9 F)
1949
32.2 C (90.0 F)
1950
29.4 C (84.9 F)
1951
28.3 C (82.9 F)
1952
31.7 C (89.1 F)
1953
33.9 C (93.0 F)
1954
27.8 C (82.0 F)
1955
33.9 C (93.0 F)
1956
32.2 C (90.0 F)
1957
31.1 C (88.0 F)
1958
30.0 C (86.0 F)
1959
31.1 C (88.0 F)
1960
29.4 C (84.9 F)
Coldest night (TNn)
The coldest night of the year at Algonquin Park, 1917 to 1960. The record is -45.0 C (-49.0 F) in 1933, marked on the chart; the median year is -38.0 C (-36.5 F).
Coldest night (TNn) at Algonquin Park by year
Year
Coldest night (TNn)
1917
-43.9 C (-47.0 F)
1918
-37.2 C (-35.0 F)
1919
-35.6 C (-32.1 F)
1920
-40.0 C (-40.0 F)
1921
-37.8 C (-36.0 F)
1922
-40.0 C (-40.0 F)
1923
-39.4 C (-38.9 F)
1924
-40.0 C (-40.0 F)
1925
-37.2 C (-35.0 F)
1926
-35.6 C (-32.1 F)
1927
-35.0 C (-31.0 F)
1928
-38.9 C (-38.0 F)
1929
-33.9 C (-29.0 F)
1930
-38.3 C (-36.9 F)
1931
-35.0 C (-31.0 F)
1932
-37.2 C (-35.0 F)
1933
-45.0 C (-49.0 F)
1934
-45.0 C (-49.0 F)
1935
-40.6 C (-41.1 F)
1936
-35.6 C (-32.1 F)
1937
-34.4 C (-29.9 F)
1938
-39.4 C (-38.9 F)
1939
-38.9 C (-38.0 F)
1940
-37.8 C (-36.0 F)
1941
-36.7 C (-34.1 F)
1942
-41.7 C (-43.1 F)
1943
-41.7 C (-43.1 F)
1944
-34.4 C (-29.9 F)
1945
-40.6 C (-41.1 F)
1946
-36.1 C (-33.0 F)
1947
-38.9 C (-38.0 F)
1948
-41.1 C (-42.0 F)
1949
-31.7 C (-25.1 F)
1950
-41.1 C (-42.0 F)
1951
-42.2 C (-44.0 F)
1952
-37.8 C (-36.0 F)
1953
-32.2 C (-26.0 F)
1954
-36.1 C (-33.0 F)
1955
-36.7 C (-34.1 F)
1956
-30.6 C (-23.1 F)
1957
-39.4 C (-38.9 F)
1958
-37.2 C (-35.0 F)
1959
-39.4 C (-38.9 F)
1960
-38.3 C (-36.9 F)
Wettest day (Rx1day)
The wettest day of the year at Algonquin Park, 1917 to 1960. The record is 104.1 mm (4.1 in) in 1920, marked on the chart; the median year is 38.4 mm (1.5 in).
Wettest day (Rx1day) at Algonquin Park by year
Year
Wettest day (Rx1day)
1917
29.0 mm (1.1 in)
1918
42.4 mm (1.7 in)
1919
40.1 mm (1.6 in)
1920
104.1 mm (4.1 in)
1921
45.7 mm (1.8 in)
1922
37.6 mm (1.5 in)
1923
53.1 mm (2.1 in)
1924
22.6 mm (0.9 in)
1925
30.5 mm (1.2 in)
1926
33.0 mm (1.3 in)
1927
49.8 mm (2.0 in)
1928
38.4 mm (1.5 in)
1929
38.1 mm (1.5 in)
1930
66.0 mm (2.6 in)
1931
38.1 mm (1.5 in)
1932
43.7 mm (1.7 in)
1933
22.9 mm (0.9 in)
1934
38.1 mm (1.5 in)
1935
22.9 mm (0.9 in)
1936
57.2 mm (2.3 in)
1937
34.3 mm (1.4 in)
1938
57.2 mm (2.3 in)
1939
39.4 mm (1.6 in)
1940
35.8 mm (1.4 in)
1941
36.3 mm (1.4 in)
1942
31.0 mm (1.2 in)
1943
41.7 mm (1.6 in)
1944
54.1 mm (2.1 in)
1945
26.7 mm (1.1 in)
1946
38.6 mm (1.5 in)
1947
44.5 mm (1.8 in)
1948
34.5 mm (1.4 in)
1949
36.8 mm (1.4 in)
1950
37.6 mm (1.5 in)
1951
53.3 mm (2.1 in)
1952
38.4 mm (1.5 in)
1953
26.7 mm (1.1 in)
1954
40.6 mm (1.6 in)
1955
45.2 mm (1.8 in)
1956
59.2 mm (2.3 in)
1957
58.2 mm (2.3 in)
1958
33.0 mm (1.3 in)
1959
39.4 mm (1.6 in)
1960
31.8 mm (1.3 in)
Wettest five days (Rx5day)
The wettest five days of the year at Algonquin Park, 1917 to 1960. The record is 141.4 mm (5.6 in) in 1957, marked on the chart; the median year is 64.2 mm (2.5 in).
Wettest five days (Rx5day) at Algonquin Park by year
Year
Wettest five days (Rx5day)
1917
40.6 mm (1.6 in)
1918
75.9 mm (3.0 in)
1919
77.7 mm (3.1 in)
1920
104.1 mm (4.1 in)
1921
69.8 mm (2.7 in)
1922
76.7 mm (3.0 in)
1923
66.1 mm (2.6 in)
1924
46.0 mm (1.8 in)
1925
55.4 mm (2.2 in)
1926
64.7 mm (2.5 in)
1927
75.8 mm (3.0 in)
1928
63.7 mm (2.5 in)
1929
55.9 mm (2.2 in)
1930
74.6 mm (2.9 in)
1931
72.5 mm (2.9 in)
1932
70.6 mm (2.8 in)
1933
36.9 mm (1.5 in)
1934
43.7 mm (1.7 in)
1935
37.2 mm (1.5 in)
1936
57.2 mm (2.3 in)
1937
47.8 mm (1.9 in)
1938
81.9 mm (3.2 in)
1939
69.9 mm (2.8 in)
1940
57.9 mm (2.3 in)
1941
56.2 mm (2.2 in)
1942
74.5 mm (2.9 in)
1943
48.3 mm (1.9 in)
1944
57.1 mm (2.2 in)
1945
39.1 mm (1.5 in)
1946
64.8 mm (2.6 in)
1947
58.2 mm (2.3 in)
1948
72.9 mm (2.9 in)
1949
60.1 mm (2.4 in)
1950
61.5 mm (2.4 in)
1951
66.6 mm (2.6 in)
1952
56.3 mm (2.2 in)
1953
55.1 mm (2.2 in)
1954
84.5 mm (3.3 in)
1955
81.0 mm (3.2 in)
1956
93.1 mm (3.7 in)
1957
141.4 mm (5.6 in)
1958
41.1 mm (1.6 in)
1959
95.3 mm (3.8 in)
1960
43.2 mm (1.7 in)
Longest dry spell (CDD)
The longest dry spell of the year at Algonquin Park, 1917 to 1960. The record is 29 days in 1934, marked on the chart; the median year is 17 days.
Longest dry spell (CDD) at Algonquin Park by year
Year
Longest dry spell (CDD)
1917
17 days
1918
15 days
1919
13 days
1920
16 days
1921
11 days
1922
20 days
1923
16 days
1924
19 days
1925
13 days
1926
18 days
1927
18 days
1928
12 days
1929
22 days
1930
21 days
1931
27 days
1932
19 days
1933
17 days
1934
29 days
1935
25 days
1936
19 days
1937
16 days
1938
27 days
1939
21 days
1940
15 days
1941
19 days
1942
18 days
1943
18 days
1944
18 days
1945
11 days
1946
12 days
1947
21 days
1948
15 days
1949
17 days
1950
11 days
1951
12 days
1952
26 days
1953
15 days
1954
12 days
1955
16 days
1956
16 days
1957
15 days
1958
21 days
1959
11 days
1960
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
39 years with a frost
Across 39 years with a frost, the median last spring frost at Algonquin Park falls on 25 May and the median first autumn frost on 18 September, which leaves a median of 115 days between them.
Fitted over all years, the growing season changes by +3.3 days per decade at this station.
Frost dates and growing season at Algonquin Park
Measure
Median, all years
Earliest period
Recent period (1927 to 1959)
Recent against earliest
Fitted trend
Last spring frost
25 May
n/a
23 May
n/a
-3.2 days per decade
First autumn frost
18 September
n/a
18 September
n/a
+0.1 days per decade
Growing days
115 days
n/a
118 days
n/a
+3.3 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
40 years, 1918 to 1959
A day with at least 39.3 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 91.1 mm (3.6 in) of rain is expected about once in 100 years.
Rainfall return levels at Algonquin Park: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
39.3 mm (1.5 in)
5 years
51.1 mm (2.0 in)
10 years
59.8 mm (2.4 in)
25 years
71.6 mm (2.8 in)
50 years
81.0 mm (3.2 in)
Longer than the 40 years of record
100 years
91.1 mm (3.6 in)
Longer than the 40 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, 40 years of values from 1918 to 1959.
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: 104.1 mm (4.1 in) in 1920; 66.0 mm (2.6 in) in 1930; 59.2 mm (2.3 in) in 1956.
Download the Data
Data for Algonquin Park standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Algonquin Park 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.