Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Fort Vermilion Cda. 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 Fort Vermilion Cda, 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)
-60.3 C (-76.5 F)
n/a
n/a
Feb
12.8 C (55.0 F)
-57.2 C (-71.0 F)
n/a
n/a
Mar
16.7 C (62.1 F)
-47.2 C (-53.0 F)
n/a
n/a
Apr
28.3 C (82.9 F)
-38.9 C (-38.0 F)
n/a
n/a
May
39.4 C (102.9 F)
-14.4 C (6.1 F)
n/a
n/a
Jun
36.7 C (98.1 F)
-8.9 C (16.0 F)
n/a
n/a
Jul
37.8 C (100.0 F)
-6.7 C (19.9 F)
n/a
n/a
Aug
36.7 C (98.1 F)
-5.6 C (21.9 F)
n/a
n/a
Sep
31.1 C (88.0 F)
-15.0 C (5.0 F)
n/a
n/a
Oct
26.7 C (80.1 F)
-30.0 C (-22.0 F)
n/a
n/a
Nov
16.5 C (61.7 F)
-43.9 C (-47.0 F)
n/a
n/a
Dec
18.3 C (64.9 F)
-57.8 C (-72.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Fort Vermilion Cda still stand. 1919 holds the most, with 48.
Standing records at Fort Vermilion Cda by the year they were set
Year set
Standing records
1908
8
1909
31
1910
13
1911
31
1912
35
1913
25
1914
9
1915
19
1916
18
1917
37
1918
40
1919
48
1920
32
1921
21
1922
13
1923
13
1924
17
1925
20
1926
21
1927
11
1928
18
1929
13
1930
13
1931
8
1932
25
1933
26
1934
27
1935
29
1936
33
1937
15
1938
23
1939
11
1940
13
1941
16
1942
13
1943
21
1944
26
1945
21
1946
11
1947
25
1948
24
1949
19
1950
18
1951
24
1952
19
1953
11
1954
34
1955
25
1956
16
1957
16
1958
9
1959
13
1960
6
1961
31
1962
11
1963
15
1964
9
1965
21
1966
18
1967
14
1968
20
1969
14
1970
17
1971
18
1972
12
1973
9
1974
8
1975
10
1976
22
1977
27
1978
10
1979
18
1980
30
1981
31
1982
9
1983
7
All-Time Record Progression
6 new records
6 all-time records were set at Fort Vermilion Cda between 16 July 1939 and 27 August 1981. Each dot is a new record.
When Fort Vermilion Cda set new all-time records
Date
Kind
Detail
1939-07-16
Record daily precipitation
Record daily precipitation 52.8 mm (2.1 in)
1941-05-19
Record daily precipitation
Record daily precipitation 59.9 mm (2.4 in)
1944-03-10
Record daily snowfall
Record daily snowfall 40.6 cm (16.0 in)
1945-10-14
Record high minimum temperature
Record high minimum temperature 18.9 C (66.0 F)
1955-04-03
Record daily snowfall
Record daily snowfall 43.2 cm (17.0 in)
1981-08-27
Record high minimum temperature
Record high minimum temperature 19.5 C (67.1 F)
Wettest Day of Each Month
May: 59.9 mm (2.4 in)
The wettest day on record for each calendar month at Fort Vermilion Cda. The most was 59.9 mm (2.4 in) on 19 May 1941.
Record daily precipitation for each month at Fort Vermilion Cda
Month
Record daily precipitation (mm)
Date
Jan
20.1 mm (0.8 in)
28 January 1976
Feb
20.3 mm (0.8 in)
16 February 1977
Mar
42.7 mm (1.7 in)
10 March 1944
Apr
43.2 mm (1.7 in)
3 April 1955
May
59.9 mm (2.4 in)
19 May 1941
Jun
51.8 mm (2.0 in)
26 June 1962
Jul
55.1 mm (2.2 in)
26 July 1957
Aug
52.6 mm (2.1 in)
27 August 1925
Sep
40.4 mm (1.6 in)
1 September 1971
Oct
35.6 mm (1.4 in)
5 October 1957
Nov
15.2 mm (0.6 in)
16 November 1934
Dec
20.3 mm (0.8 in)
20 December 1942
Period of Record Coverage
1908 to 1983
Complete yearUnder 90 percent of days
76 years of record at Fort Vermilion Cda, 1908 to 1983. 2 years have data for under 90 percent of days and are left out of rankings: 1908, 1983.
Cooler than the station meanWarmer than the station mean
One stripe for each of 75 complete years at Fort Vermilion Cda, 1909 to 1983. Blue stripes are years cooler than the station's own mean of -1.7 C (28.9 F); red stripes are warmer. The coolest year was 1919, at -4.8 C (23.4 F), and the warmest was 1981, at 1.9 C (35.4 F). The strongest colour marks a difference of 3.7 C (6.7 F).
Annual mean temperature at Fort Vermilion Cda as warming stripes, 1909 to 1983
Year
Annual mean temperature
Difference from the station mean
1909
-4.2 C
-2.44 C
1910
-2.0 C
-0.31 C
1911
-3.5 C
-1.83 C
1912
-1.3 C
+0.43 C
1913
-2.6 C
-0.86 C
1914
-3.1 C
-1.38 C
1915
-1.6 C
+0.15 C
1916
-4.0 C
-2.28 C
1917
-4.8 C
-3.04 C
1918
-4.6 C
-2.89 C
1919
-4.8 C
-3.07 C
1920
-4.0 C
-2.26 C
1921
-3.0 C
-1.26 C
1922
-2.9 C
-1.18 C
1923
-2.2 C
-0.46 C
1924
-2.3 C
-0.61 C
1925
-2.6 C
-0.90 C
1926
-0.7 C
+0.97 C
1927
-3.0 C
-1.27 C
1928
-0.1 C
+1.63 C
1929
-1.8 C
-0.07 C
1930
-0.6 C
+1.14 C
1931
-0.1 C
+1.66 C
1932
-3.3 C
-1.55 C
1933
-4.6 C
-2.86 C
1934
-2.4 C
-0.65 C
1935
-3.4 C
-1.73 C
1936
-3.4 C
-1.65 C
1937
-1.4 C
+0.28 C
1938
-0.1 C
+1.60 C
1939
-1.4 C
+0.35 C
1940
-0.5 C
+1.19 C
1941
-0.8 C
+0.89 C
1942
-0.5 C
+1.21 C
1943
0.0 C
+1.74 C
1944
0.9 C
+2.60 C
1945
-2.0 C
-0.27 C
1946
-2.0 C
-0.27 C
1947
-2.1 C
-0.40 C
1948
-1.6 C
+0.08 C
1949
-1.4 C
+0.32 C
1950
-3.2 C
-1.48 C
1951
-3.8 C
-2.07 C
1952
-0.6 C
+1.15 C
1953
-0.2 C
+1.55 C
1954
-1.4 C
+0.31 C
1955
-3.3 C
-1.61 C
1956
-2.0 C
-0.33 C
1957
-1.8 C
-0.12 C
1958
-0.2 C
+1.53 C
1959
-1.2 C
+0.51 C
1960
-1.0 C
+0.70 C
1961
-1.5 C
+0.22 C
1962
-1.1 C
+0.57 C
1963
-0.5 C
+1.17 C
1964
-1.3 C
+0.40 C
1965
-1.8 C
-0.07 C
1966
-2.7 C
-0.94 C
1967
-1.3 C
+0.37 C
1968
-1.3 C
+0.45 C
1969
-1.0 C
+0.76 C
1970
-0.9 C
+0.85 C
1971
-0.9 C
+0.85 C
1972
-2.5 C
-0.81 C
1973
-0.5 C
+1.17 C
1974
-1.4 C
+0.32 C
1975
-1.0 C
+0.71 C
1976
0.5 C
+2.24 C
1977
0.6 C
+2.36 C
1978
-0.6 C
+1.08 C
1979
-0.7 C
+1.01 C
1980
0.4 C
+2.13 C
1981
1.9 C
+3.63 C
1982
-2.3 C
-0.58 C
1983
-0.7 C
+0.98 C
The annual mean temperature here has risen by 0.4 C (0.2 to 0.5) per decade over 1909 to 1983. In Fahrenheit: 0.7 F (0.4 to 0.9) per decade. The slope is a straight line fitted to 75 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Fort Vermilion Cda
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.4 C (0.2 to 0.5) per decade
0.7 F (0.4 to 0.9) per decade
1909 to 1983
75
Rise
Mean daily maximum
0.00 C (-0.12 to 0.13) per decade
0.01 F (-0.22 to 0.24) per decade
1909 to 1983
75
Not clearly different from zero
Mean daily minimum
0.7 C (0.6 to 0.9) per decade
1.3 F (1.0 to 1.5) per decade
1909 to 1983
75
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
1908 to 1983
Yearly extremes at Fort Vermilion Cda: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
39.4 C (102.9 F)
1912
31.7 C (89.1 F)
76
Coldest night (TNn)
-60.3 C (-76.5 F)
1911
-47.2 C (-53.0 F)
76
Wettest day (Rx1day)
59.9 mm (2.4 in)
1941
27.5 mm (1.1 in)
76
Wettest five days (Rx5day)
82.5 mm (3.2 in)
1957
40.5 mm (1.6 in)
76
Longest dry spell (CDD)
75 days
1925
30 days
76
Hottest day (TXx)
The hottest day of the year at Fort Vermilion Cda, 1908 to 1983. The record is 39.4 C (102.9 F) in 1912, marked on the chart; the median year is 31.7 C (89.1 F).
Hottest day (TXx) at Fort Vermilion Cda by year
Year
Hottest day (TXx)
1908
33.3 C (91.9 F)
1909
36.7 C (98.1 F)
1910
32.2 C (90.0 F)
1911
32.2 C (90.0 F)
1912
39.4 C (102.9 F)
1913
31.7 C (89.1 F)
1914
32.2 C (90.0 F)
1915
33.3 C (91.9 F)
1916
31.1 C (88.0 F)
1917
31.7 C (89.1 F)
1918
31.7 C (89.1 F)
1919
31.7 C (89.1 F)
1920
32.8 C (91.0 F)
1921
30.0 C (86.0 F)
1922
31.1 C (88.0 F)
1923
31.1 C (88.0 F)
1924
31.1 C (88.0 F)
1925
31.7 C (89.1 F)
1926
33.3 C (91.9 F)
1927
34.4 C (93.9 F)
1928
31.7 C (89.1 F)
1929
31.1 C (88.0 F)
1930
33.3 C (91.9 F)
1931
33.3 C (91.9 F)
1932
34.4 C (93.9 F)
1933
32.2 C (90.0 F)
1934
30.6 C (87.1 F)
1935
32.2 C (90.0 F)
1936
33.3 C (91.9 F)
1937
32.8 C (91.0 F)
1938
31.1 C (88.0 F)
1939
31.1 C (88.0 F)
1940
30.6 C (87.1 F)
1941
37.8 C (100.0 F)
1942
32.2 C (90.0 F)
1943
31.1 C (88.0 F)
1944
34.4 C (93.9 F)
1945
35.6 C (96.1 F)
1946
31.7 C (89.1 F)
1947
31.1 C (88.0 F)
1948
33.3 C (91.9 F)
1949
31.1 C (88.0 F)
1950
35.6 C (96.1 F)
1951
28.9 C (84.0 F)
1952
28.3 C (82.9 F)
1953
33.9 C (93.0 F)
1954
29.4 C (84.9 F)
1955
32.8 C (91.0 F)
1956
30.0 C (86.0 F)
1957
28.3 C (82.9 F)
1958
31.1 C (88.0 F)
1959
33.3 C (91.9 F)
1960
30.6 C (87.1 F)
1961
32.8 C (91.0 F)
1962
28.3 C (82.9 F)
1963
33.3 C (91.9 F)
1964
32.8 C (91.0 F)
1965
32.2 C (90.0 F)
1966
31.1 C (88.0 F)
1967
32.8 C (91.0 F)
1968
31.7 C (89.1 F)
1969
30.6 C (87.1 F)
1970
32.8 C (91.0 F)
1971
35.0 C (95.0 F)
1972
31.7 C (89.1 F)
1973
30.0 C (86.0 F)
1974
30.6 C (87.1 F)
1975
32.8 C (91.0 F)
1976
28.9 C (84.0 F)
1977
28.3 C (82.9 F)
1978
31.0 C (87.8 F)
1979
31.5 C (88.7 F)
1980
31.5 C (88.7 F)
1981
35.0 C (95.0 F)
1982
31.5 C (88.7 F)
1983
34.0 C (93.2 F)
Coldest night (TNn)
The coldest night of the year at Fort Vermilion Cda, 1908 to 1983. The record is -60.3 C (-76.5 F) in 1911, marked on the chart; the median year is -47.2 C (-53.0 F).
Coldest night (TNn) at Fort Vermilion Cda by year
Year
Coldest night (TNn)
1908
-46.1 C (-51.0 F)
1909
-51.2 C (-60.2 F)
1910
-47.2 C (-53.0 F)
1911
-60.3 C (-76.5 F)
1912
-50.0 C (-58.0 F)
1913
-53.9 C (-65.0 F)
1914
-49.4 C (-56.9 F)
1915
-47.2 C (-53.0 F)
1916
-53.9 C (-65.0 F)
1917
-57.2 C (-71.0 F)
1918
-54.4 C (-65.9 F)
1919
-53.9 C (-65.0 F)
1920
-50.6 C (-59.1 F)
1921
-47.8 C (-54.0 F)
1922
-45.6 C (-50.1 F)
1923
-48.9 C (-56.0 F)
1924
-52.2 C (-62.0 F)
1925
-54.4 C (-65.9 F)
1926
-46.7 C (-52.1 F)
1927
-50.6 C (-59.1 F)
1928
-48.9 C (-56.0 F)
1929
-47.8 C (-54.0 F)
1930
-47.8 C (-54.0 F)
1931
-43.9 C (-47.0 F)
1932
-49.4 C (-56.9 F)
1933
-57.8 C (-72.0 F)
1934
-57.8 C (-72.0 F)
1935
-52.8 C (-63.0 F)
1936
-52.8 C (-63.0 F)
1937
-45.6 C (-50.1 F)
1938
-42.8 C (-45.0 F)
1939
-44.4 C (-47.9 F)
1940
-40.6 C (-41.1 F)
1941
-46.7 C (-52.1 F)
1942
-42.2 C (-44.0 F)
1943
-50.0 C (-58.0 F)
1944
-41.1 C (-42.0 F)
1945
-45.6 C (-50.1 F)
1946
-45.6 C (-50.1 F)
1947
-52.2 C (-62.0 F)
1948
-48.3 C (-54.9 F)
1949
-47.8 C (-54.0 F)
1950
-50.0 C (-58.0 F)
1951
-49.4 C (-56.9 F)
1952
-46.1 C (-51.0 F)
1953
-42.8 C (-45.0 F)
1954
-51.7 C (-61.1 F)
1955
-47.2 C (-53.0 F)
1956
-49.4 C (-56.9 F)
1957
-51.7 C (-61.1 F)
1958
-40.6 C (-41.1 F)
1959
-43.3 C (-45.9 F)
1960
-40.0 C (-40.0 F)
1961
-46.7 C (-52.1 F)
1962
-45.6 C (-50.1 F)
1963
-40.0 C (-40.0 F)
1964
-42.8 C (-45.0 F)
1965
-47.8 C (-54.0 F)
1966
-48.3 C (-54.9 F)
1967
-45.6 C (-50.1 F)
1968
-44.4 C (-47.9 F)
1969
-50.6 C (-59.1 F)
1970
-42.8 C (-45.0 F)
1971
-45.0 C (-49.0 F)
1972
-47.8 C (-54.0 F)
1973
-39.4 C (-38.9 F)
1974
-43.9 C (-47.0 F)
1975
-43.9 C (-47.0 F)
1976
-45.0 C (-49.0 F)
1977
-47.2 C (-53.0 F)
1978
-42.2 C (-44.0 F)
1979
-41.0 C (-41.8 F)
1980
-43.5 C (-46.3 F)
1981
-41.0 C (-41.8 F)
1982
-46.5 C (-51.7 F)
1983
-42.0 C (-43.6 F)
Wettest day (Rx1day)
The wettest day of the year at Fort Vermilion Cda, 1908 to 1983. The record is 59.9 mm (2.4 in) in 1941, marked on the chart; the median year is 27.5 mm (1.1 in).
Wettest day (Rx1day) at Fort Vermilion Cda by year
Year
Wettest day (Rx1day)
1908
25.4 mm (1.0 in)
1909
24.9 mm (1.0 in)
1910
27.7 mm (1.1 in)
1911
36.3 mm (1.4 in)
1912
23.9 mm (0.9 in)
1913
27.2 mm (1.1 in)
1914
22.9 mm (0.9 in)
1915
46.0 mm (1.8 in)
1916
38.1 mm (1.5 in)
1917
28.4 mm (1.1 in)
1918
36.8 mm (1.4 in)
1919
44.2 mm (1.7 in)
1920
27.7 mm (1.1 in)
1921
27.2 mm (1.1 in)
1922
24.9 mm (1.0 in)
1923
34.8 mm (1.4 in)
1924
20.3 mm (0.8 in)
1925
52.6 mm (2.1 in)
1926
34.0 mm (1.3 in)
1927
17.3 mm (0.7 in)
1928
15.2 mm (0.6 in)
1929
19.8 mm (0.8 in)
1930
31.2 mm (1.2 in)
1931
21.6 mm (0.9 in)
1932
15.5 mm (0.6 in)
1933
25.1 mm (1.0 in)
1934
19.6 mm (0.8 in)
1935
35.3 mm (1.4 in)
1936
26.4 mm (1.0 in)
1937
20.3 mm (0.8 in)
1938
20.3 mm (0.8 in)
1939
52.8 mm (2.1 in)
1940
26.7 mm (1.1 in)
1941
59.9 mm (2.4 in)
1942
26.9 mm (1.1 in)
1943
20.8 mm (0.8 in)
1944
42.7 mm (1.7 in)
1945
15.5 mm (0.6 in)
1946
46.0 mm (1.8 in)
1947
22.4 mm (0.9 in)
1948
27.9 mm (1.1 in)
1949
42.9 mm (1.7 in)
1950
15.2 mm (0.6 in)
1951
35.8 mm (1.4 in)
1952
30.2 mm (1.2 in)
1953
26.9 mm (1.1 in)
1954
19.8 mm (0.8 in)
1955
43.2 mm (1.7 in)
1956
31.2 mm (1.2 in)
1957
55.1 mm (2.2 in)
1958
12.7 mm (0.5 in)
1959
14.7 mm (0.6 in)
1960
28.2 mm (1.1 in)
1961
34.3 mm (1.4 in)
1962
51.8 mm (2.0 in)
1963
32.8 mm (1.3 in)
1964
25.7 mm (1.0 in)
1965
15.2 mm (0.6 in)
1966
25.7 mm (1.0 in)
1967
36.6 mm (1.4 in)
1968
14.5 mm (0.6 in)
1969
15.2 mm (0.6 in)
1970
27.9 mm (1.1 in)
1971
40.4 mm (1.6 in)
1972
33.0 mm (1.3 in)
1973
40.6 mm (1.6 in)
1974
24.9 mm (1.0 in)
1975
32.0 mm (1.3 in)
1976
30.0 mm (1.2 in)
1977
22.6 mm (0.9 in)
1978
23.6 mm (0.9 in)
1979
43.2 mm (1.7 in)
1980
20.6 mm (0.8 in)
1981
54.2 mm (2.1 in)
1982
25.0 mm (1.0 in)
1983
32.6 mm (1.3 in)
Wettest five days (Rx5day)
The wettest five days of the year at Fort Vermilion Cda, 1908 to 1983. The record is 82.5 mm (3.2 in) in 1957, marked on the chart; the median year is 40.5 mm (1.6 in).
Wettest five days (Rx5day) at Fort Vermilion Cda by year
Year
Wettest five days (Rx5day)
1908
25.4 mm (1.0 in)
1909
46.5 mm (1.8 in)
1910
36.1 mm (1.4 in)
1911
55.4 mm (2.2 in)
1912
25.9 mm (1.0 in)
1913
64.7 mm (2.5 in)
1914
24.4 mm (1.0 in)
1915
52.6 mm (2.1 in)
1916
38.9 mm (1.5 in)
1917
42.7 mm (1.7 in)
1918
40.6 mm (1.6 in)
1919
65.6 mm (2.6 in)
1920
40.4 mm (1.6 in)
1921
56.7 mm (2.2 in)
1922
30.0 mm (1.2 in)
1923
43.9 mm (1.7 in)
1924
26.1 mm (1.0 in)
1925
59.5 mm (2.3 in)
1926
48.2 mm (1.9 in)
1927
24.2 mm (1.0 in)
1928
36.5 mm (1.4 in)
1929
26.7 mm (1.1 in)
1930
37.5 mm (1.5 in)
1931
38.6 mm (1.5 in)
1932
35.9 mm (1.4 in)
1933
37.5 mm (1.5 in)
1934
25.8 mm (1.0 in)
1935
44.2 mm (1.7 in)
1936
48.8 mm (1.9 in)
1937
32.5 mm (1.3 in)
1938
26.7 mm (1.1 in)
1939
61.0 mm (2.4 in)
1940
38.9 mm (1.5 in)
1941
61.9 mm (2.4 in)
1942
33.5 mm (1.3 in)
1943
36.3 mm (1.4 in)
1944
42.7 mm (1.7 in)
1945
29.8 mm (1.2 in)
1946
61.7 mm (2.4 in)
1947
31.5 mm (1.2 in)
1948
29.7 mm (1.2 in)
1949
48.5 mm (1.9 in)
1950
30.2 mm (1.2 in)
1951
64.6 mm (2.5 in)
1952
54.3 mm (2.1 in)
1953
55.1 mm (2.2 in)
1954
27.4 mm (1.1 in)
1955
68.6 mm (2.7 in)
1956
58.9 mm (2.3 in)
1957
82.5 mm (3.2 in)
1958
22.4 mm (0.9 in)
1959
31.0 mm (1.2 in)
1960
40.9 mm (1.6 in)
1961
38.1 mm (1.5 in)
1962
76.0 mm (3.0 in)
1963
55.6 mm (2.2 in)
1964
45.5 mm (1.8 in)
1965
25.1 mm (1.0 in)
1966
38.2 mm (1.5 in)
1967
56.5 mm (2.2 in)
1968
36.6 mm (1.4 in)
1969
24.1 mm (0.9 in)
1970
42.7 mm (1.7 in)
1971
50.3 mm (2.0 in)
1972
38.1 mm (1.5 in)
1973
73.3 mm (2.9 in)
1974
39.2 mm (1.5 in)
1975
48.8 mm (1.9 in)
1976
46.3 mm (1.8 in)
1977
38.9 mm (1.5 in)
1978
31.0 mm (1.2 in)
1979
61.4 mm (2.4 in)
1980
42.8 mm (1.7 in)
1981
57.0 mm (2.2 in)
1982
27.4 mm (1.1 in)
1983
49.6 mm (2.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Fort Vermilion Cda, 1908 to 1983. The record is 75 days in 1925, marked on the chart; the median year is 30 days.
Longest dry spell (CDD) at Fort Vermilion Cda by year
Year
Longest dry spell (CDD)
1908
20 days
1909
30 days
1910
26 days
1911
33 days
1912
33 days
1913
31 days
1914
27 days
1915
24 days
1916
33 days
1917
36 days
1918
28 days
1919
30 days
1920
45 days
1921
53 days
1922
47 days
1923
33 days
1924
32 days
1925
75 days
1926
31 days
1927
29 days
1928
44 days
1929
26 days
1930
34 days
1931
26 days
1932
20 days
1933
36 days
1934
21 days
1935
21 days
1936
24 days
1937
64 days
1938
51 days
1939
19 days
1940
30 days
1941
32 days
1942
53 days
1943
34 days
1944
38 days
1945
24 days
1946
32 days
1947
21 days
1948
22 days
1949
15 days
1950
25 days
1951
28 days
1952
29 days
1953
41 days
1954
31 days
1955
23 days
1956
31 days
1957
27 days
1958
25 days
1959
29 days
1960
28 days
1961
45 days
1962
24 days
1963
26 days
1964
31 days
1965
31 days
1966
30 days
1967
40 days
1968
30 days
1969
30 days
1970
36 days
1971
31 days
1972
20 days
1973
39 days
1974
25 days
1975
37 days
1976
25 days
1977
27 days
1978
22 days
1979
40 days
1980
38 days
1981
37 days
1982
22 days
1983
28 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
75 years with a frost
Across 75 years with a frost, the median last spring frost at Fort Vermilion Cda falls on 5 June and the median first autumn frost on 25 August, which leaves a median of 81 days between them.
In 1954 to 1983 the median growing season was 104 days. That is 40 days more than in 1909 to 1938.
Fitted over all years, the growing season changes by +8.9 days per decade at this station.
Frost dates and growing season at Fort Vermilion Cda
Measure
Median, all years
Earliest period (1909 to 1938)
Recent period (1954 to 1983)
Recent against earliest
Fitted trend
Last spring frost
5 June
14 June
25 May
20 days earlier
-4.0 days per decade
First autumn frost
25 August
15 August
3 September
19 days later
+4.9 days per decade
Growing days
81 days
64 days
104 days
40 days more
+8.9 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
73 years, 1909 to 1983
A day with at least 27.8 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 66.4 mm (2.6 in) of rain is expected about once in 100 years.
Rainfall return levels at Fort Vermilion Cda: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
27.8 mm (1.1 in)
5 years
38.0 mm (1.5 in)
10 years
44.8 mm (1.8 in)
25 years
53.5 mm (2.1 in)
50 years
59.9 mm (2.4 in)
100 years
66.4 mm (2.6 in)
Longer than the 73 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, 73 years of values from 1909 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: 59.9 mm (2.4 in) in 1941; 55.1 mm (2.2 in) in 1957; 54.2 mm (2.1 in) in 1981.
Download the Data
Data for Fort Vermilion Cda standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Fort Vermilion Cda 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.