Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Rapide-Sept. 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 Rapide-Sept, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
9.4 C (48.9 F)
-44.4 C (-47.9 F)
n/a
n/a
Feb
10.0 C (50.0 F)
-41.7 C (-43.1 F)
n/a
n/a
Mar
20.6 C (69.1 F)
-40.0 C (-40.0 F)
n/a
n/a
Apr
24.4 C (75.9 F)
-26.7 C (-16.1 F)
n/a
n/a
May
32.2 C (90.0 F)
-11.1 C (12.0 F)
n/a
n/a
Jun
33.3 C (91.9 F)
-6.7 C (19.9 F)
n/a
n/a
Jul
34.4 C (93.9 F)
0.0 C (32.0 F)
n/a
n/a
Aug
35.0 C (95.0 F)
-2.2 C (28.0 F)
n/a
n/a
Sep
32.2 C (90.0 F)
-5.6 C (21.9 F)
n/a
n/a
Oct
26.1 C (79.0 F)
-10.0 C (14.0 F)
n/a
n/a
Nov
18.9 C (66.0 F)
-25.6 C (-14.1 F)
n/a
n/a
Dec
11.1 C (52.0 F)
-39.4 C (-38.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Rapide-Sept still stand. 1945 holds the most, with 71.
Standing records at Rapide-Sept by the year they were set
Year set
Standing records
1941
18
1942
50
1943
62
1944
51
1945
71
1946
61
1947
66
1948
37
1949
60
1950
57
1951
45
1952
31
1953
58
1954
26
1955
42
1956
60
1957
46
1958
50
1959
45
1960
33
1961
26
1962
53
1963
38
1964
50
1965
54
1966
41
1967
46
1968
37
1969
31
1970
42
1971
28
1972
49
Wettest Day of Each Month
Jul: 83.8 mm (3.3 in)
The wettest day on record for each calendar month at Rapide-Sept. The most was 83.8 mm (3.3 in) on 13 July 1956.
Record daily precipitation for each month at Rapide-Sept
Month
Record daily precipitation (mm)
Date
Jan
34.3 mm (1.4 in)
7 January 1962
Feb
35.6 mm (1.4 in)
25 February 1965
Mar
27.9 mm (1.1 in)
20 March 1951
Apr
24.1 mm (0.9 in)
5 April 1947
May
35.3 mm (1.4 in)
25 May 1971
Jun
80.5 mm (3.2 in)
24 June 1960
Jul
83.8 mm (3.3 in)
13 July 1956
Aug
52.1 mm (2.1 in)
9 August 1952
Sep
54.6 mm (2.1 in)
21 September 1954
Oct
35.1 mm (1.4 in)
24 October 1951
Nov
55.9 mm (2.2 in)
1 November 1967
Dec
27.4 mm (1.1 in)
4 December 1961
Period of Record Coverage
1941 to 1975
Complete yearUnder 90 percent of days
33 years of record at Rapide-Sept, 1941 to 1975. 6 years have data for under 90 percent of days and are left out of rankings: 1941, 1969, 1970, 1971, 1972, 1975.
Cooler than the station meanWarmer than the station mean
One stripe for each of 24 complete years at Rapide-Sept, 1942 to 1967. Blue stripes are years cooler than the station's own mean of 2.1 C (35.8 F); red stripes are warmer. The coolest year was 1943, at 1.1 C (34.0 F), and the warmest was 1953, at 3.5 C (38.2 F). The strongest colour marks a difference of 1.4 C (2.5 F).
Annual mean temperature at Rapide-Sept as warming stripes, 1942 to 1967
Year
Annual mean temperature
Difference from the station mean
1942
3.0 C
+0.87 C
1943
1.1 C
-1.04 C
1944
2.2 C
+0.09 C
1945
1.8 C
-0.32 C
1946
1.3 C
-0.88 C
1948
3.4 C
+1.22 C
1949
3.0 C
+0.89 C
1950
1.2 C
-0.92 C
1951
2.1 C
-0.05 C
1952
2.9 C
+0.72 C
1953
3.5 C
+1.33 C
1954
2.0 C
-0.15 C
1955
3.0 C
+0.83 C
1956
1.2 C
-0.94 C
1957
2.1 C
-0.05 C
1958
1.9 C
-0.22 C
1960
1.9 C
-0.28 C
1961
2.2 C
+0.04 C
1962
1.8 C
-0.36 C
1963
1.9 C
-0.20 C
1964
2.5 C
+0.37 C
1965
1.3 C
-0.79 C
1966
2.4 C
+0.25 C
1967
1.7 C
-0.47 C
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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
1941 to 1975
Yearly extremes at Rapide-Sept: 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)
1949
31.7 C (89.1 F)
33
Coldest night (TNn)
-44.4 C (-47.9 F)
1942
-37.8 C (-36.0 F)
33
Wettest day (Rx1day)
83.8 mm (3.3 in)
1956
42.2 mm (1.7 in)
33
Wettest five days (Rx5day)
115.1 mm (4.5 in)
1960
69.9 mm (2.8 in)
33
Longest dry spell (CDD)
29 days
1958
15 days
33
Hottest day (TXx)
The hottest day of the year at Rapide-Sept, 1941 to 1975. The record is 35.0 C (95.0 F) in 1949, marked on the chart; the median year is 31.7 C (89.1 F).
Hottest day (TXx) at Rapide-Sept by year
Year
Hottest day (TXx)
1941
28.9 C (84.0 F)
1942
32.8 C (91.0 F)
1943
31.1 C (88.0 F)
1944
32.2 C (90.0 F)
1945
32.8 C (91.0 F)
1946
30.0 C (86.0 F)
1947
33.3 C (91.9 F)
1948
32.8 C (91.0 F)
1949
35.0 C (95.0 F)
1950
30.0 C (86.0 F)
1951
30.0 C (86.0 F)
1952
32.2 C (90.0 F)
1953
32.2 C (90.0 F)
1954
28.9 C (84.0 F)
1955
32.2 C (90.0 F)
1956
32.2 C (90.0 F)
1957
30.6 C (87.1 F)
1958
29.4 C (84.9 F)
1959
30.6 C (87.1 F)
1960
29.4 C (84.9 F)
1961
30.0 C (86.0 F)
1962
32.2 C (90.0 F)
1963
32.8 C (91.0 F)
1964
31.1 C (88.0 F)
1965
28.9 C (84.0 F)
1966
33.3 C (91.9 F)
1967
30.0 C (86.0 F)
1968
33.3 C (91.9 F)
1969
31.7 C (89.1 F)
1970
32.2 C (90.0 F)
1971
31.7 C (89.1 F)
1972
29.4 C (84.9 F)
1975
23.9 C (75.0 F)
Coldest night (TNn)
The coldest night of the year at Rapide-Sept, 1941 to 1975. The record is -44.4 C (-47.9 F) in 1942, marked on the chart; the median year is -37.8 C (-36.0 F).
Coldest night (TNn) at Rapide-Sept by year
Year
Coldest night (TNn)
1941
-25.6 C (-14.1 F)
1942
-44.4 C (-47.9 F)
1943
-37.8 C (-36.0 F)
1944
-35.6 C (-32.1 F)
1945
-40.0 C (-40.0 F)
1946
-37.8 C (-36.0 F)
1947
-35.6 C (-32.1 F)
1948
-35.6 C (-32.1 F)
1949
-36.1 C (-33.0 F)
1950
-40.0 C (-40.0 F)
1951
-42.2 C (-44.0 F)
1952
-38.9 C (-38.0 F)
1953
-33.3 C (-27.9 F)
1954
-36.1 C (-33.0 F)
1955
-38.3 C (-36.9 F)
1956
-33.3 C (-27.9 F)
1957
-41.7 C (-43.1 F)
1958
-33.3 C (-27.9 F)
1959
-37.8 C (-36.0 F)
1960
-36.7 C (-34.1 F)
1961
-36.7 C (-34.1 F)
1962
-42.2 C (-44.0 F)
1963
-38.9 C (-38.0 F)
1964
-37.8 C (-36.0 F)
1965
-37.8 C (-36.0 F)
1966
-38.3 C (-36.9 F)
1967
-40.6 C (-41.1 F)
1968
-39.4 C (-38.9 F)
1969
-32.2 C (-26.0 F)
1970
-38.3 C (-36.9 F)
1971
-42.8 C (-45.0 F)
1972
-42.2 C (-44.0 F)
1975
6.1 C (43.0 F)
Wettest day (Rx1day)
The wettest day of the year at Rapide-Sept, 1941 to 1975. The record is 83.8 mm (3.3 in) in 1956, marked on the chart; the median year is 42.2 mm (1.7 in).
Wettest day (Rx1day) at Rapide-Sept by year
Year
Wettest day (Rx1day)
1941
27.9 mm (1.1 in)
1942
36.8 mm (1.4 in)
1943
50.8 mm (2.0 in)
1944
35.6 mm (1.4 in)
1945
28.4 mm (1.1 in)
1946
30.5 mm (1.2 in)
1947
50.8 mm (2.0 in)
1948
48.3 mm (1.9 in)
1949
32.3 mm (1.3 in)
1950
27.2 mm (1.1 in)
1951
35.1 mm (1.4 in)
1952
52.1 mm (2.1 in)
1953
35.6 mm (1.4 in)
1954
54.6 mm (2.1 in)
1955
52.1 mm (2.1 in)
1956
83.8 mm (3.3 in)
1957
51.8 mm (2.0 in)
1958
48.8 mm (1.9 in)
1959
46.2 mm (1.8 in)
1960
80.5 mm (3.2 in)
1961
52.8 mm (2.1 in)
1962
42.2 mm (1.7 in)
1963
45.5 mm (1.8 in)
1964
40.1 mm (1.6 in)
1965
35.6 mm (1.4 in)
1966
58.9 mm (2.3 in)
1967
55.9 mm (2.2 in)
1968
27.9 mm (1.1 in)
1969
37.3 mm (1.5 in)
1970
32.0 mm (1.3 in)
1971
49.5 mm (1.9 in)
1972
31.0 mm (1.2 in)
1975
13.7 mm (0.5 in)
Wettest five days (Rx5day)
The wettest five days of the year at Rapide-Sept, 1941 to 1975. The record is 115.1 mm (4.5 in) in 1960, marked on the chart; the median year is 69.9 mm (2.8 in).
Wettest five days (Rx5day) at Rapide-Sept by year
Year
Wettest five days (Rx5day)
1941
57.6 mm (2.3 in)
1942
65.2 mm (2.6 in)
1943
83.0 mm (3.3 in)
1944
69.9 mm (2.8 in)
1945
56.9 mm (2.2 in)
1946
47.0 mm (1.9 in)
1947
83.8 mm (3.3 in)
1948
60.3 mm (2.4 in)
1949
65.1 mm (2.6 in)
1950
51.0 mm (2.0 in)
1951
56.5 mm (2.2 in)
1952
105.7 mm (4.2 in)
1953
51.1 mm (2.0 in)
1954
87.6 mm (3.4 in)
1955
69.1 mm (2.7 in)
1956
99.3 mm (3.9 in)
1957
101.5 mm (4.0 in)
1958
74.9 mm (2.9 in)
1959
74.9 mm (2.9 in)
1960
115.1 mm (4.5 in)
1961
109.5 mm (4.3 in)
1962
52.3 mm (2.1 in)
1963
75.0 mm (3.0 in)
1964
55.6 mm (2.2 in)
1965
89.2 mm (3.5 in)
1966
78.0 mm (3.1 in)
1967
114.1 mm (4.5 in)
1968
44.7 mm (1.8 in)
1969
81.8 mm (3.2 in)
1970
63.5 mm (2.5 in)
1971
102.0 mm (4.0 in)
1972
55.8 mm (2.2 in)
1975
30.2 mm (1.2 in)
Longest dry spell (CDD)
The longest dry spell of the year at Rapide-Sept, 1941 to 1975. The record is 29 days in 1958, marked on the chart; the median year is 15 days.
Longest dry spell (CDD) at Rapide-Sept by year
Year
Longest dry spell (CDD)
1941
6 days
1942
15 days
1943
14 days
1944
18 days
1945
11 days
1946
12 days
1947
17 days
1948
21 days
1949
18 days
1950
17 days
1951
14 days
1952
18 days
1953
19 days
1954
11 days
1955
11 days
1956
11 days
1957
19 days
1958
29 days
1959
13 days
1960
19 days
1961
18 days
1962
14 days
1963
12 days
1964
15 days
1965
19 days
1966
12 days
1967
10 days
1968
18 days
1969
14 days
1970
9 days
1971
15 days
1972
18 days
1975
5 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
24 years with a frost
Across 24 years with a frost, the median last spring frost at Rapide-Sept falls on 6 June and the median first autumn frost on 16 September, which leaves a median of 103 days between them.
Frost dates and growing season at Rapide-Sept
Measure
Median, all years
Earliest period
Recent period (1942 to 1967)
Recent against earliest
Fitted trend
Last spring frost
6 June
n/a
6 June
n/a
n/a
First autumn frost
16 September
n/a
16 September
n/a
n/a
Growing days
103 days
n/a
103 days
n/a
n/a
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.
Download the Data
Data for Rapide-Sept standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Rapide-Sept 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.