Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Hay River. 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 Hay River, 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)
-52.2 C (-62.0 F)
n/a
n/a
Feb
13.3 C (55.9 F)
-50.6 C (-59.1 F)
n/a
n/a
Mar
14.4 C (57.9 F)
-47.2 C (-53.0 F)
n/a
n/a
Apr
23.3 C (73.9 F)
-40.0 C (-40.0 F)
n/a
n/a
May
31.7 C (89.1 F)
-24.4 C (-11.9 F)
n/a
n/a
Jun
32.2 C (90.0 F)
-7.8 C (18.0 F)
n/a
n/a
Jul
35.6 C (96.1 F)
-1.7 C (28.9 F)
n/a
n/a
Aug
33.3 C (91.9 F)
-6.7 C (19.9 F)
n/a
n/a
Sep
31.7 C (89.1 F)
-15.6 C (3.9 F)
n/a
n/a
Oct
25.6 C (78.1 F)
-26.1 C (-15.0 F)
n/a
n/a
Nov
11.1 C (52.0 F)
-40.6 C (-41.1 F)
n/a
n/a
Dec
14.4 C (57.9 F)
-51.2 C (-60.2 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Hay River still stand. 1903 holds the most, with 81.
Standing records at Hay River by the year they were set
Year set
Standing records
1893
21
1894
31
1895
27
1896
67
1897
8
1898
41
1899
28
1900
19
1901
31
1902
26
1903
81
1904
27
1905
24
1906
32
1907
44
1908
32
1909
40
1910
22
1911
22
1912
21
1913
21
1914
15
1915
25
1916
18
1917
49
1918
28
1919
32
1920
30
1921
12
1922
16
1923
49
1924
41
1925
28
1926
24
1927
26
1928
37
1929
26
1930
23
1931
25
1932
26
1933
29
1934
26
1935
33
1936
27
1937
10
1938
33
1939
22
1940
20
1941
28
1942
26
1943
15
Wettest Day of Each Month
Jun: 52.1 mm (2.1 in)
The wettest day on record for each calendar month at Hay River. The most was 52.1 mm (2.1 in) on 8 June 1921.
Record daily precipitation for each month at Hay River
Month
Record daily precipitation (mm)
Date
Jan
15.2 mm (0.6 in)
2 January 1937
Feb
12.7 mm (0.5 in)
10 February 1904
Mar
22.9 mm (0.9 in)
10 March 1911
Apr
20.3 mm (0.8 in)
2 April 1943
May
36.1 mm (1.4 in)
19 May 1941
Jun
52.1 mm (2.1 in)
8 June 1921
Jul
51.6 mm (2.0 in)
24 July 1936
Aug
43.9 mm (1.7 in)
20 August 1922
Sep
45.2 mm (1.8 in)
25 September 1930
Oct
33.8 mm (1.3 in)
20 October 1933
Nov
30.5 mm (1.2 in)
3 November 1941
Dec
17.8 mm (0.7 in)
6 December 1912
Period of Record Coverage
1893 to 1943
Complete yearUnder 90 percent of days
51 years of record at Hay River, 1893 to 1943. 6 years have data for under 90 percent of days and are left out of rankings: 1893, 1894, 1897, 1917, 1918, 1943.
Cooler than the station meanWarmer than the station mean
One stripe for each of 40 complete years at Hay River, 1895 to 1942. Blue stripes are years cooler than the station's own mean of -4.3 C (24.2 F); red stripes are warmer. The coolest year was 1933, at -7.1 C (19.3 F), and the warmest was 1938, at -2.5 C (27.5 F). The strongest colour marks a difference of 2.8 C (5.0 F).
Annual mean temperature at Hay River as warming stripes, 1895 to 1942
Year
Annual mean temperature
Difference from the station mean
1895
-4.0 C
+0.35 C
1896
-3.1 C
+1.20 C
1898
-3.3 C
+1.01 C
1900
-3.8 C
+0.48 C
1901
-4.3 C
+0.02 C
1903
-4.0 C
+0.29 C
1904
-4.2 C
+0.13 C
1905
-2.7 C
+1.59 C
1906
-4.4 C
-0.06 C
1907
-6.8 C
-2.44 C
1909
-6.6 C
-2.29 C
1910
-4.5 C
-0.17 C
1911
-4.4 C
-0.13 C
1912
-4.1 C
+0.22 C
1913
-5.5 C
-1.23 C
1914
-4.9 C
-0.60 C
1915
-2.7 C
+1.59 C
1916
-4.6 C
-0.26 C
1919
-5.1 C
-0.82 C
1920
-4.0 C
+0.28 C
1921
-3.4 C
+0.91 C
1923
-5.1 C
-0.83 C
1924
-4.3 C
+0.04 C
1925
-5.3 C
-0.99 C
1926
-3.9 C
+0.44 C
1928
-3.2 C
+1.07 C
1929
-6.1 C
-1.76 C
1930
-3.9 C
+0.37 C
1931
-2.8 C
+1.49 C
1932
-5.4 C
-1.09 C
1933
-7.1 C
-2.75 C
1934
-3.9 C
+0.40 C
1935
-5.4 C
-1.04 C
1936
-6.4 C
-2.06 C
1937
-3.4 C
+0.91 C
1938
-2.5 C
+1.81 C
1939
-4.0 C
+0.32 C
1940
-3.0 C
+1.27 C
1941
-3.3 C
+1.04 C
1942
-3.0 C
+1.35 C
The fitted trend in annual mean temperature here over 1895 to 1942 is 0.02 C (-0.26 to 0.29) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.03 F (-0.46 to 0.52) per decade. The slope is a straight line fitted to 40 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Hay River
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.02 C (-0.26 to 0.29) per decade
0.03 F (-0.46 to 0.52) per decade
1895 to 1942
40
Not clearly different from zero
Mean daily maximum
-0.1 C (-0.4 to 0.1) per decade
-0.3 F (-0.8 to 0.3) per decade
1895 to 1942
40
Not clearly different from zero
Mean daily minimum
0.2 C (-0.1 to 0.5) per decade
0.3 F (-0.3 to 0.9) per decade
1895 to 1942
40
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
1893 to 1943
Yearly extremes at Hay River: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
35.6 C (96.1 F)
1906
31.1 C (88.0 F)
51
Coldest night (TNn)
-52.2 C (-62.0 F)
1906
-46.7 C (-52.1 F)
51
Wettest day (Rx1day)
52.1 mm (2.1 in)
1921
23.6 mm (0.9 in)
41
Wettest five days (Rx5day)
89.9 mm (3.5 in)
1930
36.9 mm (1.5 in)
41
Longest dry spell (CDD)
66 days
1923
29 days
41
Hottest day (TXx)
The hottest day of the year at Hay River, 1893 to 1943. The record is 35.6 C (96.1 F) in 1906, marked on the chart; the median year is 31.1 C (88.0 F).
Hottest day (TXx) at Hay River by year
Year
Hottest day (TXx)
1893
15.6 C (60.1 F)
1894
30.6 C (87.1 F)
1895
33.9 C (93.0 F)
1896
33.9 C (93.0 F)
1897
19.4 C (66.9 F)
1898
32.2 C (90.0 F)
1899
31.1 C (88.0 F)
1900
29.4 C (84.9 F)
1901
32.2 C (90.0 F)
1902
27.8 C (82.0 F)
1903
31.7 C (89.1 F)
1904
29.4 C (84.9 F)
1905
31.7 C (89.1 F)
1906
35.6 C (96.1 F)
1907
31.7 C (89.1 F)
1908
27.8 C (82.0 F)
1909
29.4 C (84.9 F)
1910
28.3 C (82.9 F)
1911
27.2 C (81.0 F)
1912
31.1 C (88.0 F)
1913
27.2 C (81.0 F)
1914
28.9 C (84.0 F)
1915
32.8 C (91.0 F)
1916
31.1 C (88.0 F)
1917
27.8 C (82.0 F)
1918
30.0 C (86.0 F)
1919
30.6 C (87.1 F)
1920
32.2 C (90.0 F)
1921
31.1 C (88.0 F)
1922
29.4 C (84.9 F)
1923
31.7 C (89.1 F)
1924
31.7 C (89.1 F)
1925
31.7 C (89.1 F)
1926
31.1 C (88.0 F)
1927
32.2 C (90.0 F)
1928
31.1 C (88.0 F)
1929
28.9 C (84.0 F)
1930
31.7 C (89.1 F)
1931
33.3 C (91.9 F)
1932
32.8 C (91.0 F)
1933
30.0 C (86.0 F)
1934
28.9 C (84.0 F)
1935
26.7 C (80.1 F)
1936
30.0 C (86.0 F)
1937
29.4 C (84.9 F)
1938
31.7 C (89.1 F)
1939
30.0 C (86.0 F)
1940
30.6 C (87.1 F)
1941
34.4 C (93.9 F)
1942
32.2 C (90.0 F)
1943
25.6 C (78.1 F)
Coldest night (TNn)
The coldest night of the year at Hay River, 1893 to 1943. The record is -52.2 C (-62.0 F) in 1906, marked on the chart; the median year is -46.7 C (-52.1 F).
Coldest night (TNn) at Hay River by year
Year
Coldest night (TNn)
1893
-43.9 C (-47.0 F)
1894
-47.8 C (-54.0 F)
1895
-45.6 C (-50.1 F)
1896
-46.1 C (-51.0 F)
1897
-39.4 C (-38.9 F)
1898
-44.4 C (-47.9 F)
1899
-49.4 C (-56.9 F)
1900
-43.9 C (-47.0 F)
1901
-49.4 C (-56.9 F)
1902
-45.6 C (-50.1 F)
1903
-50.0 C (-58.0 F)
1904
-46.7 C (-52.1 F)
1905
-42.8 C (-45.0 F)
1906
-52.2 C (-62.0 F)
1907
-48.9 C (-56.0 F)
1908
-46.1 C (-51.0 F)
1909
-48.9 C (-56.0 F)
1910
-47.2 C (-53.0 F)
1911
-46.7 C (-52.1 F)
1912
-45.6 C (-50.1 F)
1913
-51.2 C (-60.2 F)
1914
-45.6 C (-50.1 F)
1915
-46.1 C (-51.0 F)
1916
-46.1 C (-51.0 F)
1917
-51.2 C (-60.2 F)
1918
-50.0 C (-58.0 F)
1919
-48.9 C (-56.0 F)
1920
-44.4 C (-47.9 F)
1921
-42.8 C (-45.0 F)
1922
-48.9 C (-56.0 F)
1923
-47.2 C (-53.0 F)
1924
-50.6 C (-59.1 F)
1925
-49.4 C (-56.9 F)
1926
-43.3 C (-45.9 F)
1927
-45.6 C (-50.1 F)
1928
-44.4 C (-47.9 F)
1929
-47.2 C (-53.0 F)
1930
-47.2 C (-53.0 F)
1931
-45.6 C (-50.1 F)
1932
-49.4 C (-56.9 F)
1933
-50.6 C (-59.1 F)
1934
-49.4 C (-56.9 F)
1935
-48.9 C (-56.0 F)
1936
-51.2 C (-60.2 F)
1937
-47.2 C (-53.0 F)
1938
-44.4 C (-47.9 F)
1939
-43.9 C (-47.0 F)
1940
-40.6 C (-41.1 F)
1941
-46.1 C (-51.0 F)
1942
-38.9 C (-38.0 F)
1943
-43.9 C (-47.0 F)
Wettest day (Rx1day)
The wettest day of the year at Hay River, 1893 to 1943. The record is 52.1 mm (2.1 in) in 1921, marked on the chart; the median year is 23.6 mm (0.9 in).
Wettest day (Rx1day) at Hay River by year
Year
Wettest day (Rx1day)
1893
n/a
1894
13.2 mm (0.5 in)
1895
17.8 mm (0.7 in)
1896
n/a
1897
0.0 mm (0.00 in)
1898
0.0 mm (0.00 in)
1899
n/a
1900
n/a
1901
n/a
1902
n/a
1903
n/a
1904
12.7 mm (0.5 in)
1905
n/a
1906
n/a
1907
n/a
1908
6.1 mm (0.24 in)
1909
21.3 mm (0.8 in)
1910
35.8 mm (1.4 in)
1911
22.9 mm (0.9 in)
1912
26.7 mm (1.1 in)
1913
24.6 mm (1.0 in)
1914
29.2 mm (1.1 in)
1915
20.3 mm (0.8 in)
1916
14.5 mm (0.6 in)
1917
14.0 mm (0.6 in)
1918
14.5 mm (0.6 in)
1919
28.7 mm (1.1 in)
1920
30.0 mm (1.2 in)
1921
52.1 mm (2.1 in)
1922
43.9 mm (1.7 in)
1923
18.5 mm (0.7 in)
1924
24.6 mm (1.0 in)
1925
40.1 mm (1.6 in)
1926
23.4 mm (0.9 in)
1927
24.9 mm (1.0 in)
1928
14.0 mm (0.6 in)
1929
21.6 mm (0.9 in)
1930
45.2 mm (1.8 in)
1931
17.0 mm (0.7 in)
1932
24.4 mm (1.0 in)
1933
33.8 mm (1.3 in)
1934
36.1 mm (1.4 in)
1935
29.5 mm (1.2 in)
1936
51.6 mm (2.0 in)
1937
25.9 mm (1.0 in)
1938
25.1 mm (1.0 in)
1939
21.6 mm (0.9 in)
1940
20.3 mm (0.8 in)
1941
36.1 mm (1.4 in)
1942
23.6 mm (0.9 in)
1943
20.3 mm (0.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Hay River, 1893 to 1943. The record is 89.9 mm (3.5 in) in 1930, marked on the chart; the median year is 36.9 mm (1.5 in).
Wettest five days (Rx5day) at Hay River by year
Year
Wettest five days (Rx5day)
1893
n/a
1894
22.1 mm (0.9 in)
1895
25.8 mm (1.0 in)
1896
n/a
1897
0.0 mm (0.00 in)
1898
0.0 mm (0.00 in)
1899
n/a
1900
n/a
1901
n/a
1902
n/a
1903
n/a
1904
12.7 mm (0.5 in)
1905
n/a
1906
n/a
1907
n/a
1908
11.7 mm (0.5 in)
1909
39.3 mm (1.5 in)
1910
56.1 mm (2.2 in)
1911
24.9 mm (1.0 in)
1912
29.7 mm (1.2 in)
1913
35.0 mm (1.4 in)
1914
40.3 mm (1.6 in)
1915
22.6 mm (0.9 in)
1916
23.9 mm (0.9 in)
1917
33.6 mm (1.3 in)
1918
23.1 mm (0.9 in)
1919
41.7 mm (1.6 in)
1920
36.9 mm (1.5 in)
1921
59.4 mm (2.3 in)
1922
56.9 mm (2.2 in)
1923
38.6 mm (1.5 in)
1924
47.7 mm (1.9 in)
1925
41.4 mm (1.6 in)
1926
37.9 mm (1.5 in)
1927
40.7 mm (1.6 in)
1928
24.2 mm (1.0 in)
1929
28.4 mm (1.1 in)
1930
89.9 mm (3.5 in)
1931
22.6 mm (0.9 in)
1932
54.9 mm (2.2 in)
1933
53.6 mm (2.1 in)
1934
38.6 mm (1.5 in)
1935
62.8 mm (2.5 in)
1936
62.0 mm (2.4 in)
1937
31.2 mm (1.2 in)
1938
33.8 mm (1.3 in)
1939
50.8 mm (2.0 in)
1940
25.9 mm (1.0 in)
1941
58.5 mm (2.3 in)
1942
25.9 mm (1.0 in)
1943
40.6 mm (1.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Hay River, 1893 to 1943. The record is 66 days in 1923, marked on the chart; the median year is 29 days.
Longest dry spell (CDD) at Hay River by year
Year
Longest dry spell (CDD)
1893
n/a
1894
22 days
1895
32 days
1896
n/a
1897
8 days
1898
35 days
1899
n/a
1900
n/a
1901
n/a
1902
n/a
1903
n/a
1904
11 days
1905
n/a
1906
n/a
1907
n/a
1908
22 days
1909
22 days
1910
52 days
1911
24 days
1912
25 days
1913
29 days
1914
32 days
1915
33 days
1916
45 days
1917
36 days
1918
27 days
1919
23 days
1920
30 days
1921
22 days
1922
26 days
1923
66 days
1924
29 days
1925
24 days
1926
26 days
1927
25 days
1928
37 days
1929
41 days
1930
26 days
1931
37 days
1932
56 days
1933
26 days
1934
31 days
1935
35 days
1936
38 days
1937
45 days
1938
30 days
1939
20 days
1940
31 days
1941
26 days
1942
28 days
1943
27 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
40 years with a frost
Across 40 years with a frost, the median last spring frost at Hay River falls on 8 June and the median first autumn frost on 8 September, which leaves a median of 88 days between them.
Fitted over all years, the growing season changes by +0.8 days per decade at this station.
Frost dates and growing season at Hay River
Measure
Median, all years
Earliest period
Recent period (1909 to 1942)
Recent against earliest
Fitted trend
Last spring frost
8 June
n/a
8 June
n/a
+0.2 days per decade
First autumn frost
8 September
n/a
9 September
n/a
+1.0 days per decade
Growing days
88 days
n/a
90 days
n/a
+0.8 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
33 years, 1910 to 1942
A day with at least 25.7 mm (1.0 in) of rain is expected about once in 2 years. A day with at least 63.0 mm (2.5 in) of rain is expected about once in 100 years.
Rainfall return levels at Hay River: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
25.7 mm (1.0 in)
5 years
35.0 mm (1.4 in)
10 years
41.4 mm (1.6 in)
25 years
49.9 mm (2.0 in)
50 years
56.4 mm (2.2 in)
Longer than the 33 years of record
100 years
63.0 mm (2.5 in)
Longer than the 33 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, 33 years of values from 1910 to 1942.
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: 52.1 mm (2.1 in) in 1921; 51.6 mm (2.0 in) in 1936; 45.2 mm (1.8 in) in 1930.
Download the Data
Data for Hay River standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Hay River 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.