Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Iroquois Falls. 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 Iroquois Falls, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
8.3 C (46.9 F)
-52.0 C (-61.6 F)
n/a
n/a
Feb
10.0 C (50.0 F)
-45.6 C (-50.1 F)
n/a
n/a
Mar
21.7 C (71.1 F)
-42.2 C (-44.0 F)
n/a
n/a
Apr
31.7 C (89.1 F)
-30.0 C (-22.0 F)
n/a
n/a
May
35.0 C (95.0 F)
-13.3 C (8.1 F)
n/a
n/a
Jun
36.1 C (97.0 F)
-9.4 C (15.1 F)
n/a
n/a
Jul
41.1 C (106.0 F)
-0.6 C (30.9 F)
n/a
n/a
Aug
37.2 C (99.0 F)
-3.3 C (26.1 F)
n/a
n/a
Sep
33.3 C (91.9 F)
-8.3 C (17.1 F)
n/a
n/a
Oct
28.9 C (84.0 F)
-16.1 C (3.0 F)
n/a
n/a
Nov
19.4 C (66.9 F)
-32.8 C (-27.0 F)
n/a
n/a
Dec
14.5 C (58.1 F)
-46.1 C (-51.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Iroquois Falls still stand. 1918 holds the most, with 56.
Standing records at Iroquois Falls by the year they were set
Year set
Standing records
1913
24
1914
12
1915
23
1916
20
1917
36
1918
56
1919
37
1920
29
1921
43
1922
34
1923
24
1924
10
1925
22
1926
24
1927
13
1928
13
1929
21
1930
17
1931
17
1932
25
1933
25
1934
27
1935
29
1936
30
1937
18
1938
18
1939
17
1940
18
1941
19
1942
18
1943
19
1944
20
1945
39
1946
29
1947
46
1948
14
1949
13
1950
12
1951
24
1952
10
1953
22
1954
12
1955
19
1956
18
1957
8
1958
21
1959
17
1960
7
1961
10
1962
20
1963
17
1964
28
1965
14
1966
14
1967
13
1968
18
1969
9
1970
15
1971
11
1972
12
1973
18
1974
20
1975
30
1976
16
1977
23
1978
15
1979
14
1980
16
1981
21
1982
26
1983
15
All-Time Record Progression
3 new records
3 all-time records were set at Iroquois Falls between 1 August 1955 and 17 January 1982. Each dot is a new record.
When Iroquois Falls set new all-time records
Date
Kind
Detail
1955-08-01
Record high minimum temperature
Record high minimum temperature 26.7 C (80.1 F)
1961-08-31
Record daily precipitation
Record daily precipitation 88.9 mm (3.5 in)
1982-01-17
Record low minimum temperature
Record low minimum temperature -52.0 C (-61.6 F)
Wettest Day of Each Month
Aug: 88.9 mm (3.5 in)
The wettest day on record for each calendar month at Iroquois Falls. The most was 88.9 mm (3.5 in) on 31 August 1961.
Record daily precipitation for each month at Iroquois Falls
Month
Record daily precipitation (mm)
Date
Jan
30.5 mm (1.2 in)
13 January 1950
Feb
25.0 mm (1.0 in)
16 February 1981
Mar
40.6 mm (1.6 in)
28 March 1917
Apr
40.1 mm (1.6 in)
29 April 1923
May
63.8 mm (2.5 in)
6 May 1922
Jun
61.0 mm (2.4 in)
19 June 1963
Jul
76.7 mm (3.0 in)
31 July 1917
Aug
88.9 mm (3.5 in)
31 August 1961
Sep
55.1 mm (2.2 in)
4 September 1971
Oct
54.9 mm (2.2 in)
18 October 1951
Nov
36.1 mm (1.4 in)
21 November 1934
Dec
33.0 mm (1.3 in)
24 December 1932
Period of Record Coverage
1913 to 1983
Complete yearUnder 90 percent of days
71 years of record at Iroquois Falls, 1913 to 1983. 2 years have data for under 90 percent of days and are left out of rankings: 1913, 1914.
Cooler than the station meanWarmer than the station mean
One stripe for each of 65 complete years at Iroquois Falls, 1915 to 1983. Blue stripes are years cooler than the station's own mean of 0.9 C (33.7 F); red stripes are warmer. The coolest year was 1917, at -1.3 C (29.6 F), and the warmest was 1922, at 3.0 C (37.4 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Iroquois Falls as warming stripes, 1915 to 1983
Year
Annual mean temperature
Difference from the station mean
1915
1.8 C
+0.91 C
1916
0.7 C
-0.24 C
1917
-1.3 C
-2.28 C
1918
-0.7 C
-1.65 C
1919
1.7 C
+0.72 C
1921
2.7 C
+1.75 C
1922
3.0 C
+2.05 C
1923
1.6 C
+0.71 C
1924
1.3 C
+0.39 C
1925
0.0 C
-0.97 C
1926
-0.2 C
-1.15 C
1927
0.4 C
-0.54 C
1928
0.2 C
-0.70 C
1929
-0.8 C
-1.73 C
1930
1.1 C
+0.16 C
1931
2.8 C
+1.83 C
1932
0.7 C
-0.24 C
1933
-0.4 C
-1.34 C
1934
-0.7 C
-1.66 C
1935
-0.1 C
-1.07 C
1936
-0.7 C
-1.59 C
1937
1.6 C
+0.67 C
1938
1.3 C
+0.32 C
1939
0.5 C
-0.40 C
1940
0.6 C
-0.29 C
1941
1.2 C
+0.24 C
1942
1.2 C
+0.29 C
1943
0.1 C
-0.80 C
1944
2.1 C
+1.14 C
1945
1.1 C
+0.18 C
1946
1.4 C
+0.46 C
1947
1.6 C
+0.65 C
1948
1.8 C
+0.82 C
1949
1.5 C
+0.54 C
1950
-0.3 C
-1.20 C
1951
1.4 C
+0.50 C
1952
2.2 C
+1.27 C
1953
2.3 C
+1.38 C
1954
1.0 C
+0.11 C
1955
2.3 C
+1.32 C
1956
0.5 C
-0.48 C
1957
1.1 C
+0.20 C
1959
0.6 C
-0.37 C
1960
1.0 C
+0.02 C
1961
1.4 C
+0.50 C
1962
0.8 C
-0.09 C
1963
0.4 C
-0.49 C
1964
0.7 C
-0.23 C
1966
0.9 C
-0.07 C
1967
0.3 C
-0.61 C
1968
1.4 C
+0.43 C
1969
1.3 C
+0.37 C
1970
0.7 C
-0.20 C
1971
1.0 C
+0.11 C
1972
-0.5 C
-1.44 C
1973
2.1 C
+1.17 C
1974
0.3 C
-0.65 C
1975
2.0 C
+1.11 C
1976
0.2 C
-0.77 C
1977
1.9 C
+0.97 C
1979
0.7 C
-0.25 C
1980
0.6 C
-0.29 C
1981
2.7 C
+1.74 C
1982
-0.1 C
-1.07 C
1983
0.8 C
-0.13 C
The fitted trend in annual mean temperature here over 1915 to 1983 is 0.05 C (-0.07 to 0.17) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.1 to 0.3) per decade. The slope is a straight line fitted to 65 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Iroquois Falls
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.05 C (-0.07 to 0.17) per decade
0.1 F (-0.1 to 0.3) per decade
1915 to 1983
65
Not clearly different from zero
Mean daily maximum
-0.01 C (-0.15 to 0.13) per decade
-0.02 F (-0.28 to 0.23) per decade
1915 to 1983
65
Not clearly different from zero
Mean daily minimum
0.10 C (-0.03 to 0.24) per decade
0.2 F (-0.1 to 0.4) per decade
1915 to 1983
65
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
1913 to 1983
Yearly extremes at Iroquois Falls: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
41.1 C (106.0 F)
1916
33.3 C (91.9 F)
71
Coldest night (TNn)
-52.0 C (-61.6 F)
1982
-40.6 C (-41.1 F)
71
Wettest day (Rx1day)
88.9 mm (3.5 in)
1961
37.1 mm (1.5 in)
71
Wettest five days (Rx5day)
103.6 mm (4.1 in)
1971
58.5 mm (2.3 in)
71
Longest dry spell (CDD)
39 days
1958
15 days
71
Hottest day (TXx)
The hottest day of the year at Iroquois Falls, 1913 to 1983. The record is 41.1 C (106.0 F) in 1916, marked on the chart; the median year is 33.3 C (91.9 F).
Hottest day (TXx) at Iroquois Falls by year
Year
Hottest day (TXx)
1913
35.6 C (96.1 F)
1914
18.9 C (66.0 F)
1915
31.1 C (88.0 F)
1916
41.1 C (106.0 F)
1917
35.0 C (95.0 F)
1918
33.9 C (93.0 F)
1919
35.0 C (95.0 F)
1920
33.3 C (91.9 F)
1921
37.2 C (99.0 F)
1922
33.3 C (91.9 F)
1923
34.4 C (93.9 F)
1924
35.0 C (95.0 F)
1925
32.2 C (90.0 F)
1926
33.3 C (91.9 F)
1927
35.6 C (96.1 F)
1928
31.7 C (89.1 F)
1929
32.8 C (91.0 F)
1930
32.2 C (90.0 F)
1931
36.1 C (97.0 F)
1932
31.1 C (88.0 F)
1933
33.9 C (93.0 F)
1934
32.2 C (90.0 F)
1935
33.9 C (93.0 F)
1936
36.1 C (97.0 F)
1937
33.9 C (93.0 F)
1938
32.8 C (91.0 F)
1939
33.3 C (91.9 F)
1940
34.4 C (93.9 F)
1941
35.0 C (95.0 F)
1942
36.1 C (97.0 F)
1943
36.1 C (97.0 F)
1944
34.4 C (93.9 F)
1945
32.2 C (90.0 F)
1946
32.2 C (90.0 F)
1947
37.2 C (99.0 F)
1948
35.0 C (95.0 F)
1949
36.7 C (98.1 F)
1950
31.1 C (88.0 F)
1951
31.7 C (89.1 F)
1952
33.3 C (91.9 F)
1953
33.3 C (91.9 F)
1954
31.1 C (88.0 F)
1955
35.0 C (95.0 F)
1956
34.4 C (93.9 F)
1957
31.7 C (89.1 F)
1958
31.7 C (89.1 F)
1959
33.3 C (91.9 F)
1960
30.0 C (86.0 F)
1961
30.0 C (86.0 F)
1962
33.3 C (91.9 F)
1963
33.3 C (91.9 F)
1964
33.9 C (93.0 F)
1965
31.7 C (89.1 F)
1966
33.3 C (91.9 F)
1967
30.0 C (86.0 F)
1968
32.2 C (90.0 F)
1969
32.2 C (90.0 F)
1970
31.7 C (89.1 F)
1971
32.2 C (90.0 F)
1972
31.1 C (88.0 F)
1973
31.7 C (89.1 F)
1974
32.8 C (91.0 F)
1975
38.9 C (102.0 F)
1976
35.0 C (95.0 F)
1977
34.0 C (93.2 F)
1978
32.0 C (89.6 F)
1979
32.0 C (89.6 F)
1980
30.5 C (86.9 F)
1981
35.0 C (95.0 F)
1982
30.0 C (86.0 F)
1983
33.0 C (91.4 F)
Coldest night (TNn)
The coldest night of the year at Iroquois Falls, 1913 to 1983. The record is -52.0 C (-61.6 F) in 1982, marked on the chart; the median year is -40.6 C (-41.1 F).
Coldest night (TNn) at Iroquois Falls by year
Year
Coldest night (TNn)
1913
-30.6 C (-23.1 F)
1914
-45.6 C (-50.1 F)
1915
-36.7 C (-34.1 F)
1916
-38.9 C (-38.0 F)
1917
-46.1 C (-51.0 F)
1918
-47.2 C (-53.0 F)
1919
-38.9 C (-38.0 F)
1920
-42.2 C (-44.0 F)
1921
-37.2 C (-35.0 F)
1922
-40.0 C (-40.0 F)
1923
-41.1 C (-42.0 F)
1924
-38.9 C (-38.0 F)
1925
-41.1 C (-42.0 F)
1926
-40.0 C (-40.0 F)
1927
-43.3 C (-45.9 F)
1928
-37.2 C (-35.0 F)
1929
-41.1 C (-42.0 F)
1930
-41.7 C (-43.1 F)
1931
-40.0 C (-40.0 F)
1932
-37.8 C (-36.0 F)
1933
-43.9 C (-47.0 F)
1934
-42.2 C (-44.0 F)
1935
-49.4 C (-56.9 F)
1936
-40.6 C (-41.1 F)
1937
-41.7 C (-43.1 F)
1938
-40.6 C (-41.1 F)
1939
-43.9 C (-47.0 F)
1940
-36.7 C (-34.1 F)
1941
-42.2 C (-44.0 F)
1942
-45.6 C (-50.1 F)
1943
-44.4 C (-47.9 F)
1944
-36.1 C (-33.0 F)
1945
-43.3 C (-45.9 F)
1946
-41.7 C (-43.1 F)
1947
-40.0 C (-40.0 F)
1948
-40.0 C (-40.0 F)
1949
-38.9 C (-38.0 F)
1950
-44.4 C (-47.9 F)
1951
-45.6 C (-50.1 F)
1952
-40.0 C (-40.0 F)
1953
-36.1 C (-33.0 F)
1954
-39.4 C (-38.9 F)
1955
-41.7 C (-43.1 F)
1956
-36.7 C (-34.1 F)
1957
-43.9 C (-47.0 F)
1958
-38.9 C (-38.0 F)
1959
-41.1 C (-42.0 F)
1960
-41.1 C (-42.0 F)
1961
-38.9 C (-38.0 F)
1962
-43.9 C (-47.0 F)
1963
-43.3 C (-45.9 F)
1964
-40.6 C (-41.1 F)
1965
-38.3 C (-36.9 F)
1966
-42.2 C (-44.0 F)
1967
-40.0 C (-40.0 F)
1968
-40.0 C (-40.0 F)
1969
-33.9 C (-29.0 F)
1970
-39.4 C (-38.9 F)
1971
-40.0 C (-40.0 F)
1972
-42.2 C (-44.0 F)
1973
-41.1 C (-42.0 F)
1974
-40.0 C (-40.0 F)
1975
-41.1 C (-42.0 F)
1976
-41.7 C (-43.1 F)
1977
-37.8 C (-36.0 F)
1978
-37.0 C (-34.6 F)
1979
-40.0 C (-40.0 F)
1980
-38.0 C (-36.4 F)
1981
-41.0 C (-41.8 F)
1982
-52.0 C (-61.6 F)
1983
-38.0 C (-36.4 F)
Wettest day (Rx1day)
The wettest day of the year at Iroquois Falls, 1913 to 1983. The record is 88.9 mm (3.5 in) in 1961, marked on the chart; the median year is 37.1 mm (1.5 in).
Wettest day (Rx1day) at Iroquois Falls by year
Year
Wettest day (Rx1day)
1913
31.0 mm (1.2 in)
1914
21.1 mm (0.8 in)
1915
40.6 mm (1.6 in)
1916
32.3 mm (1.3 in)
1917
76.7 mm (3.0 in)
1918
31.2 mm (1.2 in)
1919
48.0 mm (1.9 in)
1920
40.1 mm (1.6 in)
1921
38.4 mm (1.5 in)
1922
63.8 mm (2.5 in)
1923
40.1 mm (1.6 in)
1924
41.7 mm (1.6 in)
1925
37.1 mm (1.5 in)
1926
29.2 mm (1.1 in)
1927
37.6 mm (1.5 in)
1928
53.1 mm (2.1 in)
1929
51.3 mm (2.0 in)
1930
21.1 mm (0.8 in)
1931
49.0 mm (1.9 in)
1932
37.1 mm (1.5 in)
1933
21.8 mm (0.9 in)
1934
36.1 mm (1.4 in)
1935
30.5 mm (1.2 in)
1936
41.1 mm (1.6 in)
1937
28.2 mm (1.1 in)
1938
48.3 mm (1.9 in)
1939
46.7 mm (1.8 in)
1940
50.3 mm (2.0 in)
1941
34.3 mm (1.4 in)
1942
43.4 mm (1.7 in)
1943
36.8 mm (1.4 in)
1944
44.7 mm (1.8 in)
1945
54.1 mm (2.1 in)
1946
42.7 mm (1.7 in)
1947
35.6 mm (1.4 in)
1948
27.9 mm (1.1 in)
1949
29.2 mm (1.1 in)
1950
58.4 mm (2.3 in)
1951
54.9 mm (2.2 in)
1952
48.3 mm (1.9 in)
1953
35.6 mm (1.4 in)
1954
38.1 mm (1.5 in)
1955
29.5 mm (1.2 in)
1956
25.4 mm (1.0 in)
1957
30.5 mm (1.2 in)
1958
30.5 mm (1.2 in)
1959
26.9 mm (1.1 in)
1960
37.1 mm (1.5 in)
1961
88.9 mm (3.5 in)
1962
44.7 mm (1.8 in)
1963
61.0 mm (2.4 in)
1964
31.5 mm (1.2 in)
1965
39.1 mm (1.5 in)
1966
30.5 mm (1.2 in)
1967
43.2 mm (1.7 in)
1968
45.0 mm (1.8 in)
1969
25.1 mm (1.0 in)
1970
76.2 mm (3.0 in)
1971
55.1 mm (2.2 in)
1972
50.8 mm (2.0 in)
1973
38.4 mm (1.5 in)
1974
31.8 mm (1.3 in)
1975
29.0 mm (1.1 in)
1976
29.0 mm (1.1 in)
1977
25.4 mm (1.0 in)
1978
36.6 mm (1.4 in)
1979
30.5 mm (1.2 in)
1980
35.3 mm (1.4 in)
1981
37.9 mm (1.5 in)
1982
25.0 mm (1.0 in)
1983
36.0 mm (1.4 in)
Wettest five days (Rx5day)
The wettest five days of the year at Iroquois Falls, 1913 to 1983. The record is 103.6 mm (4.1 in) in 1971, marked on the chart; the median year is 58.5 mm (2.3 in).
Wettest five days (Rx5day) at Iroquois Falls by year
Year
Wettest five days (Rx5day)
1913
65.6 mm (2.6 in)
1914
42.4 mm (1.7 in)
1915
61.7 mm (2.4 in)
1916
45.1 mm (1.8 in)
1917
99.8 mm (3.9 in)
1918
63.9 mm (2.5 in)
1919
55.6 mm (2.2 in)
1920
49.5 mm (1.9 in)
1921
82.2 mm (3.2 in)
1922
92.6 mm (3.6 in)
1923
93.3 mm (3.7 in)
1924
58.0 mm (2.3 in)
1925
56.3 mm (2.2 in)
1926
57.1 mm (2.2 in)
1927
57.6 mm (2.3 in)
1928
73.4 mm (2.9 in)
1929
70.2 mm (2.8 in)
1930
39.3 mm (1.5 in)
1931
56.9 mm (2.2 in)
1932
75.4 mm (3.0 in)
1933
46.7 mm (1.8 in)
1934
54.9 mm (2.2 in)
1935
55.4 mm (2.2 in)
1936
57.6 mm (2.3 in)
1937
58.5 mm (2.3 in)
1938
77.7 mm (3.1 in)
1939
76.9 mm (3.0 in)
1940
62.5 mm (2.5 in)
1941
63.3 mm (2.5 in)
1942
65.4 mm (2.6 in)
1943
42.9 mm (1.7 in)
1944
77.0 mm (3.0 in)
1945
66.1 mm (2.6 in)
1946
74.0 mm (2.9 in)
1947
53.1 mm (2.1 in)
1948
49.3 mm (1.9 in)
1949
49.4 mm (1.9 in)
1950
70.1 mm (2.8 in)
1951
80.4 mm (3.2 in)
1952
74.7 mm (2.9 in)
1953
76.3 mm (3.0 in)
1954
57.1 mm (2.2 in)
1955
41.9 mm (1.6 in)
1956
33.8 mm (1.3 in)
1957
66.1 mm (2.6 in)
1958
57.9 mm (2.3 in)
1959
52.8 mm (2.1 in)
1960
81.7 mm (3.2 in)
1961
91.4 mm (3.6 in)
1962
56.9 mm (2.2 in)
1963
96.6 mm (3.8 in)
1964
51.5 mm (2.0 in)
1965
66.8 mm (2.6 in)
1966
47.5 mm (1.9 in)
1967
50.0 mm (2.0 in)
1968
74.2 mm (2.9 in)
1969
43.7 mm (1.7 in)
1970
77.0 mm (3.0 in)
1971
103.6 mm (4.1 in)
1972
57.4 mm (2.3 in)
1973
67.6 mm (2.7 in)
1974
66.6 mm (2.6 in)
1975
52.8 mm (2.1 in)
1976
47.0 mm (1.9 in)
1977
41.6 mm (1.6 in)
1978
52.2 mm (2.1 in)
1979
69.5 mm (2.7 in)
1980
67.1 mm (2.6 in)
1981
47.0 mm (1.9 in)
1982
58.8 mm (2.3 in)
1983
53.8 mm (2.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at Iroquois Falls, 1913 to 1983. The record is 39 days in 1958, marked on the chart; the median year is 15 days.
Longest dry spell (CDD) at Iroquois Falls by year
Year
Longest dry spell (CDD)
1913
10 days
1914
11 days
1915
23 days
1916
17 days
1917
23 days
1918
13 days
1919
12 days
1920
20 days
1921
20 days
1922
15 days
1923
14 days
1924
26 days
1925
16 days
1926
15 days
1927
11 days
1928
11 days
1929
16 days
1930
22 days
1931
15 days
1932
11 days
1933
14 days
1934
10 days
1935
27 days
1936
11 days
1937
14 days
1938
14 days
1939
20 days
1940
10 days
1941
26 days
1942
16 days
1943
12 days
1944
18 days
1945
15 days
1946
12 days
1947
12 days
1948
18 days
1949
25 days
1950
13 days
1951
12 days
1952
13 days
1953
18 days
1954
11 days
1955
16 days
1956
17 days
1957
19 days
1958
39 days
1959
12 days
1960
19 days
1961
26 days
1962
15 days
1963
13 days
1964
22 days
1965
19 days
1966
12 days
1967
13 days
1968
21 days
1969
23 days
1970
17 days
1971
16 days
1972
15 days
1973
17 days
1974
11 days
1975
12 days
1976
15 days
1977
20 days
1978
17 days
1979
16 days
1980
17 days
1981
15 days
1982
21 days
1983
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
65 years with a frost
Across 65 years with a frost, the median last spring frost at Iroquois Falls falls on 9 June and the median first autumn frost on 8 September, which leaves a median of 91 days between them.
In 1951 to 1983 the median growing season was 91 days. That is 1 day fewer than in 1915 to 1945.
Fitted over all years, the growing season changes by +0.1 days per decade at this station.
Frost dates and growing season at Iroquois Falls
Measure
Median, all years
Earliest period (1915 to 1945)
Recent period (1951 to 1983)
Recent against earliest
Fitted trend
Last spring frost
9 June
11 June
7 June
4 days earlier
-1.0 days per decade
First autumn frost
8 September
8 September
9 September
1 day later
-0.9 days per decade
Growing days
91 days
92 days
91 days
1 day fewer
+0.1 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
67 years, 1915 to 1983
A day with at least 38.0 mm (1.5 in) of rain is expected about once in 2 years. A day with at least 85.8 mm (3.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Iroquois Falls: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
38.0 mm (1.5 in)
5 years
49.3 mm (1.9 in)
10 years
57.3 mm (2.3 in)
25 years
68.2 mm (2.7 in)
50 years
76.8 mm (3.0 in)
100 years
85.8 mm (3.4 in)
Longer than the 67 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, 67 years of values from 1915 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: 88.9 mm (3.5 in) in 1961; 76.7 mm (3.0 in) in 1917; 76.2 mm (3.0 in) in 1970.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Iroquois Falls standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Iroquois Falls 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.