Record envelope, standing records and threshold days for Norman Wells A (CA002202800), Northwest Territories, Canada, with 70 years of record.
Key Facts for Norman Wells A
Norman Wells A (CA002202800) is a weather station in Northwest Territories, Canada at 65.28 latitude and -126.80 longitude, 73 m (240 ft) above sea level.
The station reports from 1943 to 2012, 70 years of record.
1,464 records set at Norman Wells A still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Norman Wells A set a daily record high minimum temperature of -11.9 C (10.6 F) on 26 December 1983.
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Norman Wells 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 Norman Wells A, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
11.8 C (53.2 F)
-52.2 C (-62.0 F)
n/a
n/a
Feb
5.0 C (41.0 F)
-54.4 C (-65.9 F)
n/a
n/a
Mar
11.1 C (52.0 F)
-46.1 C (-51.0 F)
n/a
n/a
Apr
20.0 C (68.0 F)
-37.2 C (-35.0 F)
n/a
n/a
May
31.1 C (88.0 F)
-17.8 C (0.0 F)
n/a
n/a
Jun
32.8 C (91.0 F)
-2.8 C (27.0 F)
n/a
n/a
Jul
33.9 C (93.0 F)
-1.1 C (30.0 F)
n/a
n/a
Aug
31.7 C (89.1 F)
-6.1 C (21.0 F)
n/a
n/a
Sep
26.7 C (80.1 F)
-15.7 C (3.7 F)
n/a
n/a
Oct
20.0 C (68.0 F)
-31.7 C (-25.1 F)
n/a
n/a
Nov
13.3 C (55.9 F)
-42.8 C (-45.0 F)
n/a
n/a
Dec
1.7 C (35.1 F)
-47.8 C (-54.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Norman Wells A still stand. 1981 holds the most, with 59.
Standing records at Norman Wells A by the year they were set
Year set
Standing records
1943
26
1944
52
1945
25
1946
28
1947
44
1948
49
1949
37
1950
35
1951
49
1952
29
1953
25
1954
46
1955
30
1956
48
1957
48
1958
9
1959
36
1960
20
1961
49
1962
31
1963
34
1964
36
1965
41
1966
39
1967
18
1968
22
1969
50
1970
36
1971
31
1972
29
1973
22
1974
43
1975
54
1976
28
1977
32
1978
26
1979
30
1980
32
1981
59
1982
57
1983
29
All-Time Record Progression
3 new records
3 all-time records were set at Norman Wells A between 10 July 1975 and 28 June 1982. Each dot is a new record.
When Norman Wells A set new all-time records
Date
Kind
Detail
1975-07-10
Record high maximum temperature
Record high maximum temperature 33.3 C (91.9 F)
1975-07-11
Record high maximum temperature
Record high maximum temperature 33.9 C (93.0 F)
1982-06-28
Record high minimum temperature
Record high minimum temperature 21.0 C (69.8 F)
Wettest Day of Each Month
Jul: 49.3 mm (1.9 in)
The wettest day on record for each calendar month at Norman Wells A. The most was 49.3 mm (1.9 in) on 19 July 1967.
Record daily precipitation for each month at Norman Wells A
Month
Record daily precipitation (mm)
Date
Jan
17.8 mm (0.7 in)
12 January 1944
Feb
19.6 mm (0.8 in)
28 February 1970
Mar
6.9 mm (0.27 in)
2 March 1958
Apr
26.7 mm (1.1 in)
29 April 1972
May
20.6 mm (0.8 in)
10 May 1956
Jun
45.1 mm (1.8 in)
23 June 1981
Jul
49.3 mm (1.9 in)
19 July 1967
Aug
48.5 mm (1.9 in)
16 August 1958
Sep
26.9 mm (1.1 in)
2 September 1949
Oct
19.0 mm (0.7 in)
1 October 1981
Nov
16.5 mm (0.6 in)
28 November 1958
Dec
17.0 mm (0.7 in)
22 December 1960
Period of Record Coverage
1943 to 1983
Complete yearUnder 90 percent of days
41 years of record at Norman Wells A, 1943 to 1983. 1 years have data for under 90 percent of days and are left out of rankings: 1943.
Cooler than the station meanWarmer than the station mean
One stripe for each of 38 complete years at Norman Wells A, 1944 to 1983. Blue stripes are years cooler than the station's own mean of -6.2 C (20.8 F); red stripes are warmer. The coolest year was 1974, at -8.0 C (17.6 F), and the warmest was 1981, at -2.9 C (26.7 F). The strongest colour marks a difference of 3.3 C (5.9 F).
Annual mean temperature at Norman Wells A as warming stripes, 1944 to 1983
Year
Annual mean temperature
Difference from the station mean
1944
-4.0 C
+2.26 C
1945
-6.0 C
+0.18 C
1946
-6.3 C
-0.09 C
1948
-6.9 C
-0.66 C
1949
-5.4 C
+0.85 C
1950
-6.2 C
-0.01 C
1951
-7.2 C
-1.00 C
1952
-6.5 C
-0.25 C
1953
-5.6 C
+0.63 C
1954
-6.3 C
-0.11 C
1955
-7.5 C
-1.24 C
1956
-7.7 C
-1.44 C
1957
-5.7 C
+0.49 C
1958
-6.0 C
+0.22 C
1959
-7.7 C
-1.47 C
1960
-6.2 C
+0.04 C
1961
-7.9 C
-1.70 C
1962
-5.2 C
+1.03 C
1963
-5.8 C
+0.39 C
1964
-7.2 C
-0.99 C
1965
-6.4 C
-0.18 C
1966
-7.9 C
-1.66 C
1967
-6.5 C
-0.30 C
1968
-6.0 C
+0.18 C
1969
-5.9 C
+0.33 C
1970
-6.2 C
+0.02 C
1971
-6.9 C
-0.66 C
1972
-6.7 C
-0.52 C
1973
-5.5 C
+0.75 C
1974
-8.0 C
-1.79 C
1975
-6.7 C
-0.47 C
1976
-4.9 C
+1.34 C
1977
-5.4 C
+0.81 C
1978
-4.7 C
+1.49 C
1980
-4.9 C
+1.33 C
1981
-2.9 C
+3.27 C
1982
-6.8 C
-0.59 C
1983
-6.6 C
-0.36 C
The fitted trend in annual mean temperature here over 1944 to 1983 is 0.1 C (-0.2 to 0.5) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.3 F (-0.3 to 0.8) per decade. The slope is a straight line fitted to 38 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Norman Wells A
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (-0.2 to 0.5) per decade
0.3 F (-0.3 to 0.8) per decade
1944 to 1983
38
Not clearly different from zero
Mean daily maximum
0.1 C (-0.2 to 0.4) per decade
0.2 F (-0.4 to 0.8) per decade
1944 to 1983
38
Not clearly different from zero
Mean daily minimum
0.2 C (-0.2 to 0.5) per decade
0.3 F (-0.3 to 0.9) per decade
1944 to 1983
38
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
1943 to 1983
Yearly extremes at Norman Wells A: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
33.9 C (93.0 F)
1975
30.6 C (87.1 F)
41
Coldest night (TNn)
-54.4 C (-65.9 F)
1947
-46.1 C (-51.0 F)
41
Wettest day (Rx1day)
49.3 mm (1.9 in)
1967
22.8 mm (0.9 in)
41
Wettest five days (Rx5day)
82.0 mm (3.2 in)
1981
37.9 mm (1.5 in)
41
Longest dry spell (CDD)
73 days
1978
28 days
41
Hottest day (TXx)
The hottest day of the year at Norman Wells A, 1943 to 1983. The record is 33.9 C (93.0 F) in 1975, marked on the chart; the median year is 30.6 C (87.1 F).
Hottest day (TXx) at Norman Wells A by year
Year
Hottest day (TXx)
1943
30.6 C (87.1 F)
1944
31.1 C (88.0 F)
1945
31.7 C (89.1 F)
1946
31.1 C (88.0 F)
1947
30.0 C (86.0 F)
1948
31.7 C (89.1 F)
1949
31.7 C (89.1 F)
1950
31.1 C (88.0 F)
1951
30.6 C (87.1 F)
1952
31.1 C (88.0 F)
1953
29.4 C (84.9 F)
1954
30.0 C (86.0 F)
1955
30.6 C (87.1 F)
1956
28.3 C (82.9 F)
1957
27.2 C (81.0 F)
1958
30.6 C (87.1 F)
1959
30.6 C (87.1 F)
1960
30.6 C (87.1 F)
1961
31.1 C (88.0 F)
1962
31.7 C (89.1 F)
1963
29.4 C (84.9 F)
1964
30.0 C (86.0 F)
1965
28.9 C (84.0 F)
1966
31.7 C (89.1 F)
1967
28.9 C (84.0 F)
1968
28.9 C (84.0 F)
1969
32.8 C (91.0 F)
1970
29.4 C (84.9 F)
1971
30.6 C (87.1 F)
1972
31.7 C (89.1 F)
1973
31.7 C (89.1 F)
1974
31.1 C (88.0 F)
1975
33.9 C (93.0 F)
1976
32.8 C (91.0 F)
1977
30.6 C (87.1 F)
1978
28.2 C (82.8 F)
1979
30.7 C (87.3 F)
1980
30.2 C (86.4 F)
1981
31.8 C (89.2 F)
1982
33.9 C (93.0 F)
1983
32.2 C (90.0 F)
Coldest night (TNn)
The coldest night of the year at Norman Wells A, 1943 to 1983. The record is -54.4 C (-65.9 F) in 1947, marked on the chart; the median year is -46.1 C (-51.0 F).
Coldest night (TNn) at Norman Wells A by year
Year
Coldest night (TNn)
1943
-37.2 C (-35.0 F)
1944
-43.9 C (-47.0 F)
1945
-42.8 C (-45.0 F)
1946
-47.2 C (-53.0 F)
1947
-54.4 C (-65.9 F)
1948
-46.7 C (-52.1 F)
1949
-48.3 C (-54.9 F)
1950
-45.0 C (-49.0 F)
1951
-50.0 C (-58.0 F)
1952
-52.2 C (-62.0 F)
1953
-44.4 C (-47.9 F)
1954
-48.9 C (-56.0 F)
1955
-46.1 C (-51.0 F)
1956
-47.2 C (-53.0 F)
1957
-46.1 C (-51.0 F)
1958
-45.6 C (-50.1 F)
1959
-46.1 C (-51.0 F)
1960
-47.2 C (-53.0 F)
1961
-46.7 C (-52.1 F)
1962
-48.3 C (-54.9 F)
1963
-50.0 C (-58.0 F)
1964
-46.7 C (-52.1 F)
1965
-47.2 C (-53.0 F)
1966
-50.0 C (-58.0 F)
1967
-46.1 C (-51.0 F)
1968
-51.7 C (-61.1 F)
1969
-46.1 C (-51.0 F)
1970
-45.0 C (-49.0 F)
1971
-48.9 C (-56.0 F)
1972
-45.6 C (-50.1 F)
1973
-47.2 C (-53.0 F)
1974
-45.0 C (-49.0 F)
1975
-49.4 C (-56.9 F)
1976
-46.1 C (-51.0 F)
1977
-43.8 C (-46.8 F)
1978
-39.6 C (-39.3 F)
1979
-48.1 C (-54.6 F)
1980
-44.5 C (-48.1 F)
1981
-37.8 C (-36.0 F)
1982
-45.0 C (-49.0 F)
1983
-44.4 C (-47.9 F)
Wettest day (Rx1day)
The wettest day of the year at Norman Wells A, 1943 to 1983. The record is 49.3 mm (1.9 in) in 1967, marked on the chart; the median year is 22.8 mm (0.9 in).
Wettest day (Rx1day) at Norman Wells A by year
Year
Wettest day (Rx1day)
1943
21.1 mm (0.8 in)
1944
18.5 mm (0.7 in)
1945
19.1 mm (0.8 in)
1946
22.9 mm (0.9 in)
1947
14.0 mm (0.6 in)
1948
22.9 mm (0.9 in)
1949
36.3 mm (1.4 in)
1950
17.3 mm (0.7 in)
1951
18.5 mm (0.7 in)
1952
45.2 mm (1.8 in)
1953
17.0 mm (0.7 in)
1954
32.5 mm (1.3 in)
1955
36.1 mm (1.4 in)
1956
20.6 mm (0.8 in)
1957
32.0 mm (1.3 in)
1958
48.5 mm (1.9 in)
1959
22.6 mm (0.9 in)
1960
31.8 mm (1.3 in)
1961
24.6 mm (1.0 in)
1962
19.3 mm (0.8 in)
1963
20.1 mm (0.8 in)
1964
31.0 mm (1.2 in)
1965
23.1 mm (0.9 in)
1966
48.3 mm (1.9 in)
1967
49.3 mm (1.9 in)
1968
18.3 mm (0.7 in)
1969
24.6 mm (1.0 in)
1970
26.9 mm (1.1 in)
1971
32.5 mm (1.3 in)
1972
26.7 mm (1.1 in)
1973
17.0 mm (0.7 in)
1974
45.2 mm (1.8 in)
1975
16.3 mm (0.6 in)
1976
12.7 mm (0.5 in)
1977
19.3 mm (0.8 in)
1978
20.8 mm (0.8 in)
1979
15.2 mm (0.6 in)
1980
20.1 mm (0.8 in)
1981
45.1 mm (1.8 in)
1982
22.8 mm (0.9 in)
1983
10.0 mm (0.4 in)
Wettest five days (Rx5day)
The wettest five days of the year at Norman Wells A, 1943 to 1983. The record is 82.0 mm (3.2 in) in 1981, marked on the chart; the median year is 37.9 mm (1.5 in).
Wettest five days (Rx5day) at Norman Wells A by year
Year
Wettest five days (Rx5day)
1943
49.3 mm (1.9 in)
1944
28.2 mm (1.1 in)
1945
42.9 mm (1.7 in)
1946
25.9 mm (1.0 in)
1947
23.9 mm (0.9 in)
1948
44.2 mm (1.7 in)
1949
76.6 mm (3.0 in)
1950
19.7 mm (0.8 in)
1951
35.9 mm (1.4 in)
1952
71.4 mm (2.8 in)
1953
29.9 mm (1.2 in)
1954
43.5 mm (1.7 in)
1955
57.1 mm (2.2 in)
1956
29.5 mm (1.2 in)
1957
36.1 mm (1.4 in)
1958
63.2 mm (2.5 in)
1959
60.2 mm (2.4 in)
1960
62.6 mm (2.5 in)
1961
44.5 mm (1.8 in)
1962
35.3 mm (1.4 in)
1963
38.7 mm (1.5 in)
1964
37.6 mm (1.5 in)
1965
41.1 mm (1.6 in)
1966
48.6 mm (1.9 in)
1967
72.9 mm (2.9 in)
1968
26.2 mm (1.0 in)
1969
49.8 mm (2.0 in)
1970
34.3 mm (1.4 in)
1971
45.4 mm (1.8 in)
1972
49.0 mm (1.9 in)
1973
34.0 mm (1.3 in)
1974
71.6 mm (2.8 in)
1975
21.1 mm (0.8 in)
1976
32.4 mm (1.3 in)
1977
37.9 mm (1.5 in)
1978
37.6 mm (1.5 in)
1979
24.2 mm (1.0 in)
1980
34.4 mm (1.4 in)
1981
82.0 mm (3.2 in)
1982
31.6 mm (1.2 in)
1983
17.1 mm (0.7 in)
Longest dry spell (CDD)
The longest dry spell of the year at Norman Wells A, 1943 to 1983. The record is 73 days in 1978, marked on the chart; the median year is 28 days.
Longest dry spell (CDD) at Norman Wells A by year
Year
Longest dry spell (CDD)
1943
23 days
1944
24 days
1945
24 days
1946
17 days
1947
35 days
1948
15 days
1949
16 days
1950
51 days
1951
42 days
1952
24 days
1953
41 days
1954
21 days
1955
32 days
1956
41 days
1957
33 days
1958
24 days
1959
43 days
1960
18 days
1961
27 days
1962
20 days
1963
34 days
1964
19 days
1965
25 days
1966
35 days
1967
36 days
1968
37 days
1969
32 days
1970
34 days
1971
26 days
1972
32 days
1973
28 days
1974
30 days
1975
28 days
1976
23 days
1977
33 days
1978
73 days
1979
66 days
1980
25 days
1981
34 days
1982
28 days
1983
20 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
38 years with a frost
Across 38 years with a frost, the median last spring frost at Norman Wells A falls on 26 May and the median first autumn frost on 3 September, which leaves a median of 99 days between them.
Fitted over all years, the growing season changes by +5.4 days per decade at this station.
Frost dates and growing season at Norman Wells A
Measure
Median, all years
Earliest period
Recent period (1953 to 1983)
Recent against earliest
Fitted trend
Last spring frost
26 May
n/a
26 May
n/a
-1.8 days per decade
First autumn frost
3 September
n/a
4 September
n/a
+3.5 days per decade
Growing days
99 days
n/a
101 days
n/a
+5.4 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, 1944 to 1983
A day with at least 23.6 mm (0.9 in) of rain is expected about once in 2 years. A day with at least 66.7 mm (2.6 in) of rain is expected about once in 100 years.
Rainfall return levels at Norman Wells 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
23.6 mm (0.9 in)
5 years
33.3 mm (1.3 in)
10 years
40.3 mm (1.6 in)
25 years
50.2 mm (2.0 in)
50 years
58.2 mm (2.3 in)
Longer than the 40 years of record
100 years
66.7 mm (2.6 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 1944 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: 49.3 mm (1.9 in) in 1967; 48.5 mm (1.9 in) in 1958; 48.3 mm (1.9 in) in 1966.
Download the Data
Data for Norman Wells A standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Norman Wells 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.