Record envelope, standing records and threshold days for Grenora (USC00323736), North Dakota, United States, with 85 years of record.
Key Facts for Grenora
Grenora (USC00323736) is a weather station in North Dakota, United States at 48.62 latitude and -103.93 longitude, 649 m (2,129 ft) above sea level.
The station reports from 1906 to 1990, 85 years of record.
1,464 records set at Grenora still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Grenora set a daily record precipitation of 41.7 mm (1.6 in) on 27 June 1990.
About the Station
Location: North Dakota, United States, 48.62 latitude, -103.93 longitude.
Elevation: 649 m (2,129 ft).
Period of record: 1906 to 1990, 85 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
0 days at or beyond a record
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Grenora. 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 Grenora, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
11.1 C (52.0 F)
-45.0 C (-49.0 F)
n/a
n/a
Feb
17.8 C (64.0 F)
-46.7 C (-52.1 F)
n/a
n/a
Mar
27.8 C (82.0 F)
-38.9 C (-38.0 F)
n/a
n/a
Apr
33.3 C (91.9 F)
-25.0 C (-13.0 F)
n/a
n/a
May
38.3 C (100.9 F)
-12.8 C (9.0 F)
n/a
n/a
Jun
40.6 C (105.1 F)
-5.6 C (21.9 F)
n/a
n/a
Jul
45.0 C (113.0 F)
-2.2 C (28.0 F)
n/a
n/a
Aug
41.1 C (106.0 F)
-3.3 C (26.1 F)
n/a
n/a
Sep
39.4 C (102.9 F)
-11.1 C (12.0 F)
n/a
n/a
Oct
33.3 C (91.9 F)
-26.7 C (-16.1 F)
n/a
n/a
Nov
25.6 C (78.1 F)
-34.4 C (-29.9 F)
n/a
n/a
Dec
18.3 C (64.9 F)
-40.0 C (-40.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Grenora still stand. 1936 holds the most, with 55.
Standing records at Grenora by the year they were set
Year set
Standing records
1906
2
1907
30
1908
18
1909
19
1910
46
1911
31
1912
19
1913
11
1914
21
1915
21
1916
22
1917
42
1918
31
1919
41
1920
12
1921
24
1922
12
1923
10
1924
18
1925
24
1926
13
1927
17
1928
11
1929
26
1930
18
1931
36
1932
14
1933
13
1934
23
1935
29
1936
55
1937
27
1938
4
1939
46
1940
20
1941
15
1942
3
1943
5
1944
17
1945
20
1946
17
1947
18
1948
21
1949
17
1950
20
1951
9
1952
16
1953
16
1954
19
1955
12
1956
10
1957
16
1958
19
1959
11
1960
9
1961
4
1962
17
1963
22
1964
17
1965
15
1966
18
1967
7
1968
12
1969
12
1970
5
1971
7
1972
12
1973
11
1974
8
1975
7
1976
12
1977
16
1978
4
1979
8
1980
18
1981
18
1984
8
1985
23
1986
10
1987
27
1988
26
1989
18
1990
6
All-Time Record Progression
1 new records
1 all-time records were set at Grenora between 14 July 1970 and 14 July 1970. Each dot is a new record.
When Grenora set new all-time records
Date
Kind
Detail
1970-07-14
Record daily precipitation
Record daily precipitation 99.1 mm (3.9 in)
Wettest Day of Each Month
Jul: 99.1 mm (3.9 in)
The wettest day on record for each calendar month at Grenora. The most was 99.1 mm (3.9 in) on 14 July 1970.
Record daily precipitation for each month at Grenora
Month
Record daily precipitation (mm)
Date
Jan
28.2 mm (1.1 in)
7 January 1907
Feb
35.6 mm (1.4 in)
1 February 1911
Mar
58.4 mm (2.3 in)
27 March 1907
Apr
50.8 mm (2.0 in)
30 April 1921
May
71.6 mm (2.8 in)
14 May 1922
Jun
72.6 mm (2.9 in)
19 June 1921
Jul
99.1 mm (3.9 in)
14 July 1970
Aug
52.1 mm (2.1 in)
16 August 1985
Sep
56.4 mm (2.2 in)
12 September 1978
Oct
43.2 mm (1.7 in)
14 October 1975
Nov
35.8 mm (1.4 in)
18 November 1906
Dec
43.2 mm (1.7 in)
14 December 1906
Period of Record Coverage
1906 to 1990
Complete yearUnder 90 percent of days
83 years of record at Grenora, 1906 to 1990. 13 years have data for under 90 percent of days and are left out of rankings: 1906, 1919, 1924, 1926, 1938, 1942, 1943, 1944 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 67 complete years at Grenora, 1907 to 1989. Blue stripes are years cooler than the station's own mean of 4.2 C (39.5 F); red stripes are warmer. The coolest year was 1917, at 1.3 C (34.3 F), and the warmest was 1987, at 7.8 C (46.0 F). The strongest colour marks a difference of 3.7 C (6.7 F).
Annual mean temperature at Grenora as warming stripes, 1907 to 1989
Year
Annual mean temperature
Difference from the station mean
1907
1.8 C
-2.38 C
1908
4.6 C
+0.37 C
1909
3.0 C
-1.14 C
1910
3.6 C
-0.63 C
1911
1.8 C
-2.37 C
1912
2.3 C
-1.86 C
1913
3.6 C
-0.60 C
1914
3.3 C
-0.91 C
1915
3.3 C
-0.92 C
1917
1.3 C
-2.88 C
1918
3.6 C
-0.63 C
1920
4.0 C
-0.14 C
1921
4.5 C
+0.35 C
1922
3.2 C
-1.01 C
1923
3.6 C
-0.54 C
1925
3.5 C
-0.69 C
1927
1.8 C
-2.43 C
1928
4.0 C
-0.15 C
1929
2.2 C
-2.03 C
1930
4.3 C
+0.15 C
1931
6.8 C
+2.64 C
1932
3.3 C
-0.89 C
1933
4.1 C
-0.13 C
1934
5.5 C
+1.29 C
1935
2.8 C
-1.42 C
1936
2.3 C
-1.90 C
1939
5.2 C
+1.06 C
1940
4.0 C
-0.16 C
1941
5.1 C
+0.96 C
1945
4.2 C
+0.06 C
1946
5.6 C
+1.44 C
1947
5.0 C
+0.82 C
1948
5.0 C
+0.81 C
1949
4.6 C
+0.46 C
1950
1.9 C
-2.30 C
1952
5.0 C
+0.79 C
1953
6.1 C
+1.87 C
1954
5.2 C
+1.04 C
1955
4.0 C
-0.22 C
1956
4.7 C
+0.52 C
1957
5.3 C
+1.13 C
1959
4.5 C
+0.33 C
1960
4.8 C
+0.58 C
1961
5.5 C
+1.33 C
1962
4.8 C
+0.64 C
1963
5.8 C
+1.65 C
1964
4.4 C
+0.21 C
1965
3.0 C
-1.20 C
1966
3.8 C
-0.36 C
1967
4.5 C
+0.35 C
1968
4.6 C
+0.38 C
1969
3.9 C
-0.32 C
1970
3.7 C
-0.53 C
1971
4.0 C
-0.17 C
1972
3.4 C
-0.82 C
1973
5.5 C
+1.35 C
1974
5.2 C
+0.97 C
1975
4.3 C
+0.07 C
1976
5.6 C
+1.40 C
1977
5.4 C
+1.18 C
1978
3.6 C
-0.57 C
1979
3.6 C
-0.55 C
1985
3.0 C
-1.16 C
1986
5.7 C
+1.55 C
1987
7.8 C
+3.60 C
1988
6.3 C
+2.10 C
1989
4.6 C
+0.41 C
The annual mean temperature here has risen by 0.3 C (0.1 to 0.4) per decade over 1907 to 1989. In Fahrenheit: 0.5 F (0.3 to 0.7) per decade. The slope is a straight line fitted to 67 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Grenora
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.3 C (0.1 to 0.4) per decade
0.5 F (0.3 to 0.7) per decade
1907 to 1989
67
Rise
Mean daily maximum
0.3 C (0.2 to 0.4) per decade
0.5 F (0.3 to 0.7) per decade
1907 to 1989
67
Rise
Mean daily minimum
0.2 C (0.1 to 0.4) per decade
0.4 F (0.2 to 0.6) per decade
1907 to 1989
67
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
1906 to 1990
Yearly extremes at Grenora: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
45.0 C (113.0 F)
1936
37.8 C (100.0 F)
83
Coldest night (TNn)
-46.7 C (-52.1 F)
1936
-36.1 C (-33.0 F)
83
Wettest day (Rx1day)
99.1 mm (3.9 in)
1970
36.1 mm (1.4 in)
83
Wettest five days (Rx5day)
111.6 mm (4.4 in)
1953
51.5 mm (2.0 in)
83
Longest dry spell (CDD)
140 days
1949
38 days
83
Hottest day (TXx)
The hottest day of the year at Grenora, 1906 to 1990. The record is 45.0 C (113.0 F) in 1936, marked on the chart; the median year is 37.8 C (100.0 F).
Hottest day (TXx) at Grenora by year
Year
Hottest day (TXx)
1906
28.3 C (82.9 F)
1907
35.6 C (96.1 F)
1908
39.4 C (102.9 F)
1909
37.8 C (100.0 F)
1910
38.9 C (102.0 F)
1911
36.1 C (97.0 F)
1912
35.6 C (96.1 F)
1913
33.9 C (93.0 F)
1914
36.1 C (97.0 F)
1915
33.3 C (91.9 F)
1916
35.0 C (95.0 F)
1917
41.7 C (107.1 F)
1918
37.8 C (100.0 F)
1919
38.3 C (100.9 F)
1920
38.3 C (100.9 F)
1921
36.7 C (98.1 F)
1922
38.3 C (100.9 F)
1923
35.6 C (96.1 F)
1924
33.9 C (93.0 F)
1925
38.9 C (102.0 F)
1926
31.1 C (88.0 F)
1927
31.7 C (89.1 F)
1928
37.8 C (100.0 F)
1929
40.6 C (105.1 F)
1930
38.3 C (100.9 F)
1931
42.2 C (108.0 F)
1932
36.1 C (97.0 F)
1933
39.4 C (102.9 F)
1934
38.9 C (102.0 F)
1935
39.4 C (102.9 F)
1936
45.0 C (113.0 F)
1937
43.9 C (111.0 F)
1938
36.1 C (97.0 F)
1939
37.2 C (99.0 F)
1940
38.9 C (102.0 F)
1941
40.0 C (104.0 F)
1942
38.9 C (102.0 F)
1943
32.2 C (90.0 F)
1944
33.9 C (93.0 F)
1945
38.9 C (102.0 F)
1946
37.8 C (100.0 F)
1947
39.4 C (102.9 F)
1948
38.3 C (100.9 F)
1949
41.1 C (106.0 F)
1950
37.8 C (100.0 F)
1951
36.7 C (98.1 F)
1952
39.4 C (102.9 F)
1953
33.3 C (91.9 F)
1954
35.6 C (96.1 F)
1955
37.8 C (100.0 F)
1956
37.8 C (100.0 F)
1957
37.2 C (99.0 F)
1958
40.6 C (105.1 F)
1959
38.3 C (100.9 F)
1960
38.3 C (100.9 F)
1961
37.8 C (100.0 F)
1962
35.6 C (96.1 F)
1963
38.3 C (100.9 F)
1964
37.8 C (100.0 F)
1965
37.8 C (100.0 F)
1966
37.8 C (100.0 F)
1967
36.1 C (97.0 F)
1968
37.8 C (100.0 F)
1969
36.7 C (98.1 F)
1970
36.7 C (98.1 F)
1971
37.8 C (100.0 F)
1972
36.1 C (97.0 F)
1973
37.2 C (99.0 F)
1974
36.7 C (98.1 F)
1975
38.9 C (102.0 F)
1976
39.4 C (102.9 F)
1977
35.6 C (96.1 F)
1978
37.8 C (100.0 F)
1979
38.3 C (100.9 F)
1980
38.3 C (100.9 F)
1981
37.8 C (100.0 F)
1984
39.4 C (102.9 F)
1985
39.4 C (102.9 F)
1986
36.7 C (98.1 F)
1987
36.1 C (97.0 F)
1988
40.6 C (105.1 F)
1989
40.6 C (105.1 F)
1990
35.0 C (95.0 F)
Coldest night (TNn)
The coldest night of the year at Grenora, 1906 to 1990. The record is -46.7 C (-52.1 F) in 1936, marked on the chart; the median year is -36.1 C (-33.0 F).
Coldest night (TNn) at Grenora by year
Year
Coldest night (TNn)
1906
-28.3 C (-18.9 F)
1907
-41.1 C (-42.0 F)
1908
-30.0 C (-22.0 F)
1909
-40.0 C (-40.0 F)
1910
-37.2 C (-35.0 F)
1911
-41.1 C (-42.0 F)
1912
-43.9 C (-47.0 F)
1913
-38.3 C (-36.9 F)
1914
-39.4 C (-38.9 F)
1915
-45.0 C (-49.0 F)
1916
-43.3 C (-45.9 F)
1917
-42.2 C (-44.0 F)
1918
-39.4 C (-38.9 F)
1919
-37.8 C (-36.0 F)
1920
-39.4 C (-38.9 F)
1921
-34.4 C (-29.9 F)
1922
-36.7 C (-34.1 F)
1923
-38.9 C (-38.0 F)
1924
-37.8 C (-36.0 F)
1925
-32.8 C (-27.0 F)
1926
-26.7 C (-16.1 F)
1927
-37.2 C (-35.0 F)
1928
-37.2 C (-35.0 F)
1929
-38.9 C (-38.0 F)
1930
-37.2 C (-35.0 F)
1931
-28.9 C (-20.0 F)
1932
-33.9 C (-29.0 F)
1933
-39.4 C (-38.9 F)
1934
-38.9 C (-38.0 F)
1935
-41.1 C (-42.0 F)
1936
-46.7 C (-52.1 F)
1937
-38.9 C (-38.0 F)
1938
-37.8 C (-36.0 F)
1939
-41.7 C (-43.1 F)
1940
-36.7 C (-34.1 F)
1941
-30.6 C (-23.1 F)
1942
-30.0 C (-22.0 F)
1943
-36.1 C (-33.0 F)
1944
-31.7 C (-25.1 F)
1945
-32.8 C (-27.0 F)
1946
-32.2 C (-26.0 F)
1947
-35.0 C (-31.0 F)
1948
-33.9 C (-29.0 F)
1949
-35.6 C (-32.1 F)
1950
-42.8 C (-45.0 F)
1951
-38.9 C (-38.0 F)
1952
-32.8 C (-27.0 F)
1953
-32.8 C (-27.0 F)
1954
-40.0 C (-40.0 F)
1955
-33.9 C (-29.0 F)
1956
-35.6 C (-32.1 F)
1957
-35.0 C (-31.0 F)
1958
-33.3 C (-27.9 F)
1959
-33.9 C (-29.0 F)
1960
-31.7 C (-25.1 F)
1961
-35.0 C (-31.0 F)
1962
-38.9 C (-38.0 F)
1963
-33.9 C (-29.0 F)
1964
-33.3 C (-27.9 F)
1965
-36.1 C (-33.0 F)
1966
-38.9 C (-38.0 F)
1967
-36.1 C (-33.0 F)
1968
-39.4 C (-38.9 F)
1969
-40.0 C (-40.0 F)
1970
-38.3 C (-36.9 F)
1971
-35.6 C (-32.1 F)
1972
-37.2 C (-35.0 F)
1973
-33.3 C (-27.9 F)
1974
-35.6 C (-32.1 F)
1975
-32.2 C (-26.0 F)
1976
-34.4 C (-29.9 F)
1977
-38.3 C (-36.9 F)
1978
-33.9 C (-29.0 F)
1979
-33.9 C (-29.0 F)
1980
-35.0 C (-31.0 F)
1981
-31.7 C (-25.1 F)
1984
-36.1 C (-33.0 F)
1985
-36.7 C (-34.1 F)
1986
-37.2 C (-35.0 F)
1987
-26.7 C (-16.1 F)
1988
-33.9 C (-29.0 F)
1989
-38.3 C (-36.9 F)
1990
-33.3 C (-27.9 F)
Wettest day (Rx1day)
The wettest day of the year at Grenora, 1906 to 1990. The record is 99.1 mm (3.9 in) in 1970, marked on the chart; the median year is 36.1 mm (1.4 in).
Wettest day (Rx1day) at Grenora by year
Year
Wettest day (Rx1day)
1906
43.2 mm (1.7 in)
1907
58.4 mm (2.3 in)
1908
33.3 mm (1.3 in)
1909
44.5 mm (1.8 in)
1910
22.9 mm (0.9 in)
1911
42.7 mm (1.7 in)
1912
45.7 mm (1.8 in)
1913
29.5 mm (1.2 in)
1914
61.2 mm (2.4 in)
1915
25.7 mm (1.0 in)
1916
48.3 mm (1.9 in)
1917
43.2 mm (1.7 in)
1918
61.0 mm (2.4 in)
1919
32.0 mm (1.3 in)
1920
34.5 mm (1.4 in)
1921
72.6 mm (2.9 in)
1922
71.6 mm (2.8 in)
1923
37.3 mm (1.5 in)
1924
49.3 mm (1.9 in)
1925
43.9 mm (1.7 in)
1926
26.4 mm (1.0 in)
1927
39.6 mm (1.6 in)
1928
38.1 mm (1.5 in)
1929
33.3 mm (1.3 in)
1930
40.6 mm (1.6 in)
1931
41.9 mm (1.6 in)
1932
50.8 mm (2.0 in)
1933
40.6 mm (1.6 in)
1934
29.5 mm (1.2 in)
1935
28.4 mm (1.1 in)
1936
27.9 mm (1.1 in)
1937
41.9 mm (1.6 in)
1938
52.1 mm (2.1 in)
1939
20.8 mm (0.8 in)
1940
29.7 mm (1.2 in)
1941
24.9 mm (1.0 in)
1942
15.5 mm (0.6 in)
1943
23.9 mm (0.9 in)
1944
35.1 mm (1.4 in)
1945
28.2 mm (1.1 in)
1946
36.8 mm (1.4 in)
1947
36.1 mm (1.4 in)
1948
49.8 mm (2.0 in)
1949
19.3 mm (0.8 in)
1950
58.4 mm (2.3 in)
1951
31.0 mm (1.2 in)
1952
46.2 mm (1.8 in)
1953
41.9 mm (1.6 in)
1954
21.8 mm (0.9 in)
1955
34.3 mm (1.4 in)
1956
33.0 mm (1.3 in)
1957
24.9 mm (1.0 in)
1958
21.6 mm (0.9 in)
1959
33.0 mm (1.3 in)
1960
39.6 mm (1.6 in)
1961
37.8 mm (1.5 in)
1962
21.3 mm (0.8 in)
1963
57.2 mm (2.3 in)
1964
27.9 mm (1.1 in)
1965
54.6 mm (2.1 in)
1966
33.0 mm (1.3 in)
1967
31.8 mm (1.3 in)
1968
33.0 mm (1.3 in)
1969
43.7 mm (1.7 in)
1970
99.1 mm (3.9 in)
1971
34.8 mm (1.4 in)
1972
35.1 mm (1.4 in)
1973
46.7 mm (1.8 in)
1974
26.2 mm (1.0 in)
1975
43.2 mm (1.7 in)
1976
51.3 mm (2.0 in)
1977
30.5 mm (1.2 in)
1978
56.4 mm (2.2 in)
1979
30.5 mm (1.2 in)
1980
28.2 mm (1.1 in)
1981
15.2 mm (0.6 in)
1984
26.2 mm (1.0 in)
1985
52.1 mm (2.1 in)
1986
30.5 mm (1.2 in)
1987
22.9 mm (0.9 in)
1988
55.9 mm (2.2 in)
1989
37.6 mm (1.5 in)
1990
41.7 mm (1.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Grenora, 1906 to 1990. The record is 111.6 mm (4.4 in) in 1953, marked on the chart; the median year is 51.5 mm (2.0 in).
Wettest five days (Rx5day) at Grenora by year
Year
Wettest five days (Rx5day)
1906
43.2 mm (1.7 in)
1907
58.4 mm (2.3 in)
1908
49.8 mm (2.0 in)
1909
64.3 mm (2.5 in)
1910
33.1 mm (1.3 in)
1911
90.5 mm (3.6 in)
1912
84.8 mm (3.3 in)
1913
49.0 mm (1.9 in)
1914
86.1 mm (3.4 in)
1915
31.5 mm (1.2 in)
1916
48.8 mm (1.9 in)
1917
39.9 mm (1.6 in)
1918
104.2 mm (4.1 in)
1919
52.8 mm (2.1 in)
1920
49.2 mm (1.9 in)
1921
56.6 mm (2.2 in)
1922
51.5 mm (2.0 in)
1923
80.0 mm (3.1 in)
1924
55.1 mm (2.2 in)
1925
60.4 mm (2.4 in)
1926
41.6 mm (1.6 in)
1927
59.9 mm (2.4 in)
1928
70.7 mm (2.8 in)
1929
40.6 mm (1.6 in)
1930
55.8 mm (2.2 in)
1931
68.1 mm (2.7 in)
1932
56.5 mm (2.2 in)
1933
56.5 mm (2.2 in)
1934
44.4 mm (1.7 in)
1935
40.6 mm (1.6 in)
1936
54.3 mm (2.1 in)
1937
50.8 mm (2.0 in)
1938
93.7 mm (3.7 in)
1939
61.0 mm (2.4 in)
1940
32.7 mm (1.3 in)
1941
66.0 mm (2.6 in)
1942
29.2 mm (1.1 in)
1943
30.0 mm (1.2 in)
1944
40.4 mm (1.6 in)
1945
42.5 mm (1.7 in)
1946
55.4 mm (2.2 in)
1947
62.5 mm (2.5 in)
1948
52.6 mm (2.1 in)
1949
38.4 mm (1.5 in)
1950
63.5 mm (2.5 in)
1951
36.8 mm (1.4 in)
1952
53.3 mm (2.1 in)
1953
111.6 mm (4.4 in)
1954
42.4 mm (1.7 in)
1955
50.9 mm (2.0 in)
1956
56.9 mm (2.2 in)
1957
39.6 mm (1.6 in)
1958
29.3 mm (1.2 in)
1959
80.8 mm (3.2 in)
1960
53.6 mm (2.1 in)
1961
37.8 mm (1.5 in)
1962
34.8 mm (1.4 in)
1963
92.0 mm (3.6 in)
1964
60.2 mm (2.4 in)
1965
106.9 mm (4.2 in)
1966
46.0 mm (1.8 in)
1967
33.6 mm (1.3 in)
1968
80.3 mm (3.2 in)
1969
86.6 mm (3.4 in)
1970
101.6 mm (4.0 in)
1971
45.7 mm (1.8 in)
1972
50.4 mm (2.0 in)
1973
92.4 mm (3.6 in)
1974
40.4 mm (1.6 in)
1975
43.2 mm (1.7 in)
1976
63.9 mm (2.5 in)
1977
49.9 mm (2.0 in)
1978
70.9 mm (2.8 in)
1979
40.7 mm (1.6 in)
1980
34.8 mm (1.4 in)
1981
21.4 mm (0.8 in)
1984
37.9 mm (1.5 in)
1985
55.9 mm (2.2 in)
1986
45.7 mm (1.8 in)
1987
30.8 mm (1.2 in)
1988
60.2 mm (2.4 in)
1989
39.1 mm (1.5 in)
1990
46.8 mm (1.8 in)
Longest dry spell (CDD)
The longest dry spell of the year at Grenora, 1906 to 1990. The record is 140 days in 1949, marked on the chart; the median year is 38 days.
Longest dry spell (CDD) at Grenora by year
Year
Longest dry spell (CDD)
1906
25 days
1907
50 days
1908
25 days
1909
36 days
1910
48 days
1911
25 days
1912
30 days
1913
40 days
1914
27 days
1915
60 days
1916
34 days
1917
64 days
1918
67 days
1919
38 days
1920
39 days
1921
33 days
1922
21 days
1923
15 days
1924
22 days
1925
41 days
1926
39 days
1927
19 days
1928
62 days
1929
54 days
1930
28 days
1931
59 days
1932
30 days
1933
43 days
1934
67 days
1935
56 days
1936
45 days
1937
37 days
1938
32 days
1939
40 days
1940
30 days
1941
25 days
1942
20 days
1943
42 days
1944
49 days
1945
28 days
1946
44 days
1947
32 days
1948
47 days
1949
140 days
1950
55 days
1951
35 days
1952
66 days
1953
43 days
1954
62 days
1955
46 days
1956
31 days
1957
76 days
1958
28 days
1959
30 days
1960
47 days
1961
43 days
1962
35 days
1963
62 days
1964
19 days
1965
49 days
1966
53 days
1967
25 days
1968
37 days
1969
45 days
1970
32 days
1971
36 days
1972
30 days
1973
33 days
1974
38 days
1975
33 days
1976
35 days
1977
25 days
1978
40 days
1979
66 days
1980
45 days
1981
34 days
1984
26 days
1985
35 days
1986
46 days
1987
47 days
1988
27 days
1989
44 days
1990
68 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
67 years with a frost
Across 67 years with a frost, the median last spring frost at Grenora falls on 19 May and the median first autumn frost on 14 September, which leaves a median of 118 days between them.
In 1954 to 1989 the median growing season was 121 days. That is 9 days more than in 1907 to 1945.
Fitted over all years, the growing season changes by +4.3 days per decade at this station.
Frost dates and growing season at Grenora
Measure
Median, all years
Earliest period (1907 to 1945)
Recent period (1954 to 1989)
Recent against earliest
Fitted trend
Last spring frost
19 May
23 May
17 May
6 days earlier
-2.0 days per decade
First autumn frost
14 September
11 September
15 September
4 days later
+2.3 days per decade
Growing days
118 days
112 days
121 days
9 days more
+4.3 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
57 years, 1907 to 1989
A day with at least 36.7 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 88.3 mm (3.5 in) of rain is expected about once in 100 years.
Rainfall return levels at Grenora: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
36.7 mm (1.4 in)
5 years
48.9 mm (1.9 in)
10 years
57.6 mm (2.3 in)
25 years
69.3 mm (2.7 in)
50 years
78.6 mm (3.1 in)
100 years
88.3 mm (3.5 in)
Longer than the 57 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, 57 years of values from 1907 to 1989.
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: 99.1 mm (3.9 in) in 1970; 72.6 mm (2.9 in) in 1921; 61.0 mm (2.4 in) in 1918.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Grenora, at 1961. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1961 ran 0.3 C (0.6 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Grenora, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1961
-0.3
-0.6
likely
5
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Download the Data
Data for Grenora standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Grenora 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.