Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Bomnak. The lines show the 2026 daily maximum and minimum. 3 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Bomnak, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
-4.1 C (24.6 F)
-51.1 C (-60.0 F)
-10.4 C (13.3 F)
-39.5 C (-39.1 F)
Feb
1.6 C (34.9 F)
-48.1 C (-54.6 F)
-8.0 C (17.6 F)
-33.0 C (-27.4 F)
Mar
9.6 C (49.3 F)
-42.8 C (-45.0 F)
-0.7 C (30.7 F)
-33.5 C (-28.3 F)
Apr
24.2 C (75.6 F)
-32.1 C (-25.8 F)
12.9 C (55.2 F)
-10.5 C (13.1 F)
May
31.9 C (89.4 F)
-9.6 C (14.7 F)
27.7 C (81.9 F)
-2.4 C (27.7 F)
Jun
35.8 C (96.4 F)
-3.4 C (25.9 F)
34.6 C (94.3 F)
1.3 C (34.3 F)
Jul
40.1 C (104.2 F)
-0.1 C (31.8 F)
30.6 C (87.1 F)
10.0 C (50.0 F)
Aug
34.0 C (93.2 F)
-1.4 C (29.5 F)
25.3 C (77.5 F)
6.7 C (44.1 F)
Sep
27.8 C (82.0 F)
-10.4 C (13.3 F)
n/a
n/a
Oct
20.8 C (69.4 F)
-31.7 C (-25.1 F)
n/a
n/a
Nov
6.1 C (43.0 F)
-45.6 C (-50.1 F)
n/a
n/a
Dec
-1.1 C (30.0 F)
-52.1 C (-61.8 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Bomnak still stand. 1952 holds the most, with 34.
Standing records at Bomnak by the year they were set
Year set
Standing records
1909
3
1910
7
1911
13
1912
11
1913
9
1914
14
1915
27
1916
15
1917
10
1926
11
1928
10
1929
19
1930
16
1931
19
1932
8
1933
18
1934
12
1935
8
1936
5
1937
14
1938
8
1939
20
1940
20
1941
15
1942
19
1943
19
1944
14
1945
13
1946
10
1947
17
1948
9
1949
10
1950
21
1951
3
1952
34
1953
4
1954
20
1955
26
1956
15
1957
10
1958
10
1959
7
1960
21
1961
9
1962
12
1963
19
1964
18
1965
22
1966
19
1967
21
1968
29
1969
32
1970
14
1971
18
1972
19
1973
8
1974
3
1975
28
1976
11
1977
14
1978
8
1979
14
1980
14
1981
12
1982
12
1983
13
1984
9
1985
3
1986
10
1987
9
1988
13
1989
9
1990
18
1991
11
1992
6
1993
7
1994
11
1995
19
1996
15
1997
12
1998
11
1999
9
2000
22
2001
12
2002
7
2003
3
2004
7
2005
18
2006
2
2007
17
2008
16
2009
9
2010
17
2011
25
2012
16
2013
12
2014
17
2015
17
2016
10
2017
20
2018
23
2019
7
2020
2
2021
20
2022
5
2023
14
2024
7
2025
4
All-Time Record Progression
6 new records
6 all-time records were set at Bomnak between 19 December 1952 and 25 July 2011. Each dot is a new record.
When Bomnak set new all-time records
Date
Kind
Detail
1952-12-19
Record low maximum temperature
Record low maximum temperature -42.5 C (-44.5 F)
1952-12-20
Record low maximum temperature
Record low maximum temperature -42.9 C (-45.2 F)
1952-12-20
Record low minimum temperature
Record low minimum temperature -52.1 C (-61.8 F)
1955-08-04
Record daily precipitation
Record daily precipitation 101.2 mm (4.0 in)
1974-07-25
Record high minimum temperature
Record high minimum temperature 21.1 C (70.0 F)
2011-07-25
Record high minimum temperature
Record high minimum temperature 22.5 C (72.5 F)
Wettest Day of Each Month
Aug: 101.2 mm (4.0 in)
The wettest day on record for each calendar month at Bomnak. The most was 101.2 mm (4.0 in) on 4 August 1955.
Record daily precipitation for each month at Bomnak
Month
Record daily precipitation (mm)
Date
Jan
6.2 mm (0.24 in)
4 January 1983
Feb
9.4 mm (0.37 in)
12 February 2016
Mar
17.8 mm (0.7 in)
28 March 1946
Apr
35.9 mm (1.4 in)
29 April 1983
May
52.1 mm (2.1 in)
23 May 2021
Jun
56.9 mm (2.2 in)
15 June 2021
Jul
93.0 mm (3.7 in)
30 July 1938
Aug
101.2 mm (4.0 in)
4 August 1955
Sep
57.4 mm (2.3 in)
1 September 2012
Oct
37.0 mm (1.5 in)
3 October 2001
Nov
18.6 mm (0.7 in)
4 November 2015
Dec
11.7 mm (0.5 in)
20 December 1979
Period of Record Coverage
1909 to 2025
Complete yearUnder 90 percent of days
108 years of record at Bomnak, 1909 to 2025. 18 years have data for under 90 percent of days and are left out of rankings: 1909, 1910, 1911, 1913, 1926, 1935, 1938, 1939 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 82 complete years at Bomnak, 1912 to 2018. Blue stripes are years cooler than the station's own mean of -4.4 C (24.1 F); red stripes are warmer. The coolest year was 1969, at -7.3 C (18.8 F), and the warmest was 2008, at -1.9 C (28.6 F). The strongest colour marks a difference of 3.0 C (5.4 F).
Annual mean temperature at Bomnak as warming stripes, 1912 to 2018
Year
Annual mean temperature
Difference from the station mean
1912
-5.9 C
-1.58 C
1914
-5.0 C
-0.60 C
1915
-6.6 C
-2.27 C
1916
-4.6 C
-0.22 C
1917
-4.6 C
-0.28 C
1928
-5.7 C
-1.32 C
1930
-5.0 C
-0.60 C
1931
-5.3 C
-0.93 C
1932
-4.2 C
+0.15 C
1933
-5.0 C
-0.62 C
1934
-3.7 C
+0.70 C
1937
-5.5 C
-1.16 C
1940
-5.0 C
-0.59 C
1942
-5.3 C
-0.89 C
1943
-3.3 C
+1.05 C
1944
-3.9 C
+0.44 C
1948
-3.2 C
+1.19 C
1949
-4.2 C
+0.18 C
1950
-6.0 C
-1.67 C
1951
-4.8 C
-0.41 C
1952
-6.7 C
-2.32 C
1953
-5.0 C
-0.62 C
1954
-5.2 C
-0.80 C
1955
-5.0 C
-0.61 C
1956
-5.8 C
-1.40 C
1957
-4.9 C
-0.55 C
1958
-5.2 C
-0.80 C
1959
-3.9 C
+0.45 C
1960
-6.1 C
-1.78 C
1961
-4.7 C
-0.29 C
1962
-4.1 C
+0.30 C
1963
-3.7 C
+0.65 C
1964
-5.3 C
-0.94 C
1965
-6.3 C
-1.90 C
1966
-5.8 C
-1.47 C
1967
-4.3 C
+0.08 C
1968
-3.3 C
+1.06 C
1969
-7.3 C
-2.97 C
1970
-5.3 C
-0.91 C
1971
-4.0 C
+0.35 C
1972
-5.6 C
-1.21 C
1974
-4.5 C
-0.15 C
1975
-3.0 C
+1.33 C
1976
-5.1 C
-0.75 C
1977
-5.6 C
-1.23 C
1978
-4.7 C
-0.37 C
1979
-4.7 C
-0.31 C
1980
-4.4 C
-0.06 C
1981
-4.8 C
-0.39 C
1982
-4.2 C
+0.18 C
1983
-4.3 C
+0.06 C
1984
-4.5 C
-0.09 C
1985
-4.9 C
-0.57 C
1986
-3.6 C
+0.80 C
1987
-5.9 C
-1.51 C
1988
-2.5 C
+1.90 C
1989
-3.2 C
+1.21 C
1990
-2.5 C
+1.84 C
1991
-4.0 C
+0.41 C
1992
-4.2 C
+0.18 C
1993
-3.7 C
+0.70 C
1994
-4.5 C
-0.14 C
1997
-3.3 C
+1.04 C
1998
-3.6 C
+0.78 C
1999
-4.4 C
-0.07 C
2000
-3.8 C
+0.58 C
2001
-3.7 C
+0.63 C
2002
-2.8 C
+1.61 C
2003
-3.7 C
+0.67 C
2005
-2.6 C
+1.76 C
2007
-2.6 C
+1.72 C
2008
-1.9 C
+2.46 C
2009
-4.1 C
+0.29 C
2010
-3.2 C
+1.13 C
2011
-2.4 C
+1.93 C
2012
-3.8 C
+0.57 C
2013
-3.2 C
+1.17 C
2014
-3.1 C
+1.24 C
2015
-2.7 C
+1.67 C
2016
-4.4 C
-0.01 C
2017
-2.7 C
+1.66 C
2018
-3.0 C
+1.32 C
The annual mean temperature here has risen by 0.2 C (0.2 to 0.3) per decade over 1912 to 2018. In Fahrenheit: 0.4 F (0.3 to 0.5) per decade. The slope is a straight line fitted to 82 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Bomnak
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (0.2 to 0.3) per decade
0.4 F (0.3 to 0.5) per decade
1912 to 2018
82
Rise
Mean daily maximum
0.12 C (0.05 to 0.20) per decade
0.2 F (0.1 to 0.4) per decade
1912 to 2018
82
Rise
Mean daily minimum
0.3 C (0.3 to 0.4) per decade
0.6 F (0.5 to 0.7) per decade
1912 to 2018
82
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
1909 to 2025
Yearly extremes at Bomnak: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.1 C (104.2 F)
1926
32.0 C (89.6 F)
108
Coldest night (TNn)
-52.1 C (-61.8 F)
1952
-46.3 C (-51.4 F)
108
Wettest day (Rx1day)
101.2 mm (4.0 in)
1955
42.6 mm (1.7 in)
108
Wettest five days (Rx5day)
205.1 mm (8.1 in)
1928
71.6 mm (2.8 in)
108
Longest dry spell (CDD)
91 days
1981
42 days
108
Hottest day (TXx)
The hottest day of the year at Bomnak, 1909 to 2025. The record is 40.1 C (104.2 F) in 1926, marked on the chart; the median year is 32.0 C (89.6 F).
Hottest day (TXx) at Bomnak by year
Year
Hottest day (TXx)
1909
32.0 C (89.6 F)
1910
29.0 C (84.2 F)
1911
30.3 C (86.5 F)
1912
29.5 C (85.1 F)
1913
30.0 C (86.0 F)
1914
31.8 C (89.2 F)
1915
31.2 C (88.2 F)
1916
32.4 C (90.3 F)
1917
28.9 C (84.0 F)
1926
40.1 C (104.2 F)
1928
31.3 C (88.3 F)
1929
28.5 C (83.3 F)
1930
32.5 C (90.5 F)
1931
35.3 C (95.5 F)
1932
32.5 C (90.5 F)
1933
32.2 C (90.0 F)
1934
32.4 C (90.3 F)
1935
31.6 C (88.9 F)
1936
30.7 C (87.3 F)
1937
32.0 C (89.6 F)
1938
28.1 C (82.6 F)
1939
32.2 C (90.0 F)
1940
33.1 C (91.6 F)
1941
32.4 C (90.3 F)
1942
34.0 C (93.2 F)
1943
32.0 C (89.6 F)
1944
32.6 C (90.7 F)
1945
30.5 C (86.9 F)
1946
31.2 C (88.2 F)
1947
33.0 C (91.4 F)
1948
33.0 C (91.4 F)
1949
34.7 C (94.5 F)
1950
34.5 C (94.1 F)
1951
31.7 C (89.1 F)
1952
32.2 C (90.0 F)
1953
32.4 C (90.3 F)
1954
34.0 C (93.2 F)
1955
32.6 C (90.7 F)
1956
30.2 C (86.4 F)
1957
30.2 C (86.4 F)
1958
31.2 C (88.2 F)
1959
31.5 C (88.7 F)
1960
33.0 C (91.4 F)
1961
29.8 C (85.6 F)
1962
33.3 C (91.9 F)
1963
34.0 C (93.2 F)
1964
31.4 C (88.5 F)
1965
29.2 C (84.6 F)
1966
30.9 C (87.6 F)
1967
31.4 C (88.5 F)
1968
34.1 C (93.4 F)
1969
33.0 C (91.4 F)
1970
35.3 C (95.5 F)
1971
31.3 C (88.3 F)
1972
30.3 C (86.5 F)
1973
31.7 C (89.1 F)
1974
30.6 C (87.1 F)
1975
32.2 C (90.0 F)
1976
33.0 C (91.4 F)
1977
32.0 C (89.6 F)
1978
30.7 C (87.3 F)
1979
32.9 C (91.2 F)
1980
32.8 C (91.0 F)
1981
31.3 C (88.3 F)
1982
32.6 C (90.7 F)
1983
30.7 C (87.3 F)
1984
30.0 C (86.0 F)
1985
30.5 C (86.9 F)
1986
31.1 C (88.0 F)
1987
30.1 C (86.2 F)
1988
33.0 C (91.4 F)
1989
30.5 C (86.9 F)
1990
29.8 C (85.6 F)
1991
31.3 C (88.3 F)
1992
35.8 C (96.4 F)
1993
30.8 C (87.4 F)
1994
29.8 C (85.6 F)
1995
30.1 C (86.2 F)
1996
33.1 C (91.6 F)
1997
34.0 C (93.2 F)
1998
32.9 C (91.2 F)
1999
32.9 C (91.2 F)
2000
31.9 C (89.4 F)
2001
29.8 C (85.6 F)
2002
32.2 C (90.0 F)
2003
31.8 C (89.2 F)
2004
33.5 C (92.3 F)
2005
33.7 C (92.7 F)
2006
30.4 C (86.7 F)
2007
31.9 C (89.4 F)
2008
34.2 C (93.6 F)
2009
29.2 C (84.6 F)
2010
30.2 C (86.4 F)
2011
35.2 C (95.4 F)
2012
31.6 C (88.9 F)
2013
32.2 C (90.0 F)
2014
32.0 C (89.6 F)
2015
33.2 C (91.8 F)
2016
28.2 C (82.8 F)
2017
36.2 C (97.2 F)
2018
31.9 C (89.4 F)
2019
29.3 C (84.7 F)
2020
32.5 C (90.5 F)
2021
32.7 C (90.9 F)
2022
33.3 C (91.9 F)
2023
34.0 C (93.2 F)
2024
32.6 C (90.7 F)
2025
34.6 C (94.3 F)
Coldest night (TNn)
The coldest night of the year at Bomnak, 1909 to 2025. The record is -52.1 C (-61.8 F) in 1952, marked on the chart; the median year is -46.3 C (-51.4 F).
Coldest night (TNn) at Bomnak by year
Year
Coldest night (TNn)
1909
2.1 C (35.8 F)
1910
-45.4 C (-49.7 F)
1911
-48.7 C (-55.7 F)
1912
-50.6 C (-59.1 F)
1913
-44.1 C (-47.4 F)
1914
-50.7 C (-59.3 F)
1915
-50.0 C (-58.0 F)
1916
-51.1 C (-60.0 F)
1917
-44.9 C (-48.8 F)
1926
-48.5 C (-55.3 F)
1928
-47.9 C (-54.2 F)
1929
-46.8 C (-52.2 F)
1930
-47.2 C (-53.0 F)
1931
-50.7 C (-59.3 F)
1932
-46.7 C (-52.1 F)
1933
-49.7 C (-57.5 F)
1934
-46.0 C (-50.8 F)
1935
-49.4 C (-56.9 F)
1936
-47.2 C (-53.0 F)
1937
-48.7 C (-55.7 F)
1938
-47.5 C (-53.5 F)
1939
-46.5 C (-51.7 F)
1940
-45.4 C (-49.7 F)
1941
-48.5 C (-55.3 F)
1942
-49.9 C (-57.8 F)
1943
-44.5 C (-48.1 F)
1944
-46.0 C (-50.8 F)
1945
-47.5 C (-53.5 F)
1946
-49.3 C (-56.7 F)
1947
-48.2 C (-54.8 F)
1948
-48.6 C (-55.5 F)
1949
-47.5 C (-53.5 F)
1950
-49.1 C (-56.4 F)
1951
-46.4 C (-51.5 F)
1952
-52.1 C (-61.8 F)
1953
-47.9 C (-54.2 F)
1954
-46.6 C (-51.9 F)
1955
-45.3 C (-49.5 F)
1956
-48.5 C (-55.3 F)
1957
-48.0 C (-54.4 F)
1958
-46.5 C (-51.7 F)
1959
-48.9 C (-56.0 F)
1960
-48.6 C (-55.5 F)
1961
-49.0 C (-56.2 F)
1962
-44.9 C (-48.8 F)
1963
-43.0 C (-45.4 F)
1964
-47.6 C (-53.7 F)
1965
-49.1 C (-56.4 F)
1966
-46.7 C (-52.1 F)
1967
-43.6 C (-46.5 F)
1968
-46.7 C (-52.1 F)
1969
-49.0 C (-56.2 F)
1970
-49.9 C (-57.8 F)
1971
-47.3 C (-53.1 F)
1972
-46.6 C (-51.9 F)
1973
-46.0 C (-50.8 F)
1974
-45.7 C (-50.3 F)
1975
-43.3 C (-45.9 F)
1976
-48.1 C (-54.6 F)
1977
-47.2 C (-53.0 F)
1978
-44.0 C (-47.2 F)
1979
-49.0 C (-56.2 F)
1980
-51.1 C (-60.0 F)
1981
-41.9 C (-43.4 F)
1982
-47.7 C (-53.9 F)
1983
-43.4 C (-46.1 F)
1984
-46.3 C (-51.3 F)
1985
-45.6 C (-50.1 F)
1986
-44.2 C (-47.6 F)
1987
-46.4 C (-51.5 F)
1988
-46.9 C (-52.4 F)
1989
-45.0 C (-49.0 F)
1990
-46.2 C (-51.2 F)
1991
-41.6 C (-42.9 F)
1992
-41.3 C (-42.3 F)
1993
-45.0 C (-49.0 F)
1994
-48.9 C (-56.0 F)
1995
-39.3 C (-38.7 F)
1996
-50.5 C (-58.9 F)
1997
-42.2 C (-44.0 F)
1998
-47.3 C (-53.1 F)
1999
-42.8 C (-45.0 F)
2000
-43.6 C (-46.5 F)
2001
-42.7 C (-44.9 F)
2002
-41.8 C (-43.2 F)
2003
-40.4 C (-40.7 F)
2004
-43.8 C (-46.8 F)
2005
-40.8 C (-41.4 F)
2006
-44.4 C (-47.9 F)
2007
-38.6 C (-37.5 F)
2008
-43.6 C (-46.5 F)
2009
-43.1 C (-45.6 F)
2010
-42.6 C (-44.7 F)
2011
-41.9 C (-43.4 F)
2012
-44.1 C (-47.4 F)
2013
-41.0 C (-41.8 F)
2014
-42.2 C (-44.0 F)
2015
-42.1 C (-43.8 F)
2016
-43.0 C (-45.4 F)
2017
-40.7 C (-41.3 F)
2018
-44.6 C (-48.3 F)
2019
-44.2 C (-47.6 F)
2020
-41.5 C (-42.7 F)
2021
-45.1 C (-49.2 F)
2022
-41.8 C (-43.2 F)
2023
-47.5 C (-53.5 F)
2024
-41.7 C (-43.1 F)
2025
-39.5 C (-39.1 F)
Wettest day (Rx1day)
The wettest day of the year at Bomnak, 1909 to 2025. The record is 101.2 mm (4.0 in) in 1955, marked on the chart; the median year is 42.6 mm (1.7 in).
Wettest day (Rx1day) at Bomnak by year
Year
Wettest day (Rx1day)
1909
46.2 mm (1.8 in)
1910
21.8 mm (0.9 in)
1911
33.7 mm (1.3 in)
1912
44.4 mm (1.7 in)
1913
36.6 mm (1.4 in)
1914
37.9 mm (1.5 in)
1915
37.3 mm (1.5 in)
1916
33.5 mm (1.3 in)
1917
27.6 mm (1.1 in)
1926
31.9 mm (1.3 in)
1928
82.8 mm (3.3 in)
1929
62.8 mm (2.5 in)
1930
38.6 mm (1.5 in)
1931
36.7 mm (1.4 in)
1932
56.4 mm (2.2 in)
1933
34.8 mm (1.4 in)
1934
30.7 mm (1.2 in)
1935
36.1 mm (1.4 in)
1936
60.6 mm (2.4 in)
1937
35.2 mm (1.4 in)
1938
93.0 mm (3.7 in)
1939
49.3 mm (1.9 in)
1940
77.8 mm (3.1 in)
1941
43.3 mm (1.7 in)
1942
43.8 mm (1.7 in)
1943
57.1 mm (2.2 in)
1944
48.5 mm (1.9 in)
1945
37.5 mm (1.5 in)
1946
30.9 mm (1.2 in)
1947
31.0 mm (1.2 in)
1948
25.8 mm (1.0 in)
1949
61.3 mm (2.4 in)
1950
44.7 mm (1.8 in)
1951
57.5 mm (2.3 in)
1952
53.1 mm (2.1 in)
1953
76.9 mm (3.0 in)
1954
32.8 mm (1.3 in)
1955
101.2 mm (4.0 in)
1956
39.2 mm (1.5 in)
1957
32.4 mm (1.3 in)
1958
43.7 mm (1.7 in)
1959
52.6 mm (2.1 in)
1960
35.6 mm (1.4 in)
1961
38.3 mm (1.5 in)
1962
35.8 mm (1.4 in)
1963
40.2 mm (1.6 in)
1964
49.7 mm (2.0 in)
1965
40.7 mm (1.6 in)
1966
53.0 mm (2.1 in)
1967
51.7 mm (2.0 in)
1968
29.7 mm (1.2 in)
1969
36.6 mm (1.4 in)
1970
29.6 mm (1.2 in)
1971
32.7 mm (1.3 in)
1972
46.3 mm (1.8 in)
1973
27.6 mm (1.1 in)
1974
62.0 mm (2.4 in)
1975
52.6 mm (2.1 in)
1976
55.7 mm (2.2 in)
1977
47.1 mm (1.9 in)
1978
25.6 mm (1.0 in)
1979
34.8 mm (1.4 in)
1980
33.3 mm (1.3 in)
1981
31.7 mm (1.2 in)
1982
87.6 mm (3.4 in)
1983
52.6 mm (2.1 in)
1984
70.8 mm (2.8 in)
1985
54.2 mm (2.1 in)
1986
41.2 mm (1.6 in)
1987
45.6 mm (1.8 in)
1988
43.7 mm (1.7 in)
1989
35.4 mm (1.4 in)
1990
47.3 mm (1.9 in)
1991
31.7 mm (1.2 in)
1992
36.6 mm (1.4 in)
1993
44.1 mm (1.7 in)
1994
41.8 mm (1.6 in)
1995
89.8 mm (3.5 in)
1996
50.3 mm (2.0 in)
1997
64.6 mm (2.5 in)
1998
35.6 mm (1.4 in)
1999
32.1 mm (1.3 in)
2000
62.0 mm (2.4 in)
2001
37.0 mm (1.5 in)
2002
56.3 mm (2.2 in)
2003
26.9 mm (1.1 in)
2004
40.8 mm (1.6 in)
2005
41.1 mm (1.6 in)
2006
23.5 mm (0.9 in)
2007
70.5 mm (2.8 in)
2008
49.0 mm (1.9 in)
2009
56.6 mm (2.2 in)
2010
51.1 mm (2.0 in)
2011
28.4 mm (1.1 in)
2012
57.4 mm (2.3 in)
2013
60.5 mm (2.4 in)
2014
56.3 mm (2.2 in)
2015
30.0 mm (1.2 in)
2016
34.5 mm (1.4 in)
2017
46.0 mm (1.8 in)
2018
32.8 mm (1.3 in)
2019
53.1 mm (2.1 in)
2020
34.0 mm (1.3 in)
2021
56.9 mm (2.2 in)
2022
43.9 mm (1.7 in)
2023
51.1 mm (2.0 in)
2024
39.1 mm (1.5 in)
2025
40.9 mm (1.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Bomnak, 1909 to 2025. The record is 205.1 mm (8.1 in) in 1928, marked on the chart; the median year is 71.6 mm (2.8 in).
Wettest five days (Rx5day) at Bomnak by year
Year
Wettest five days (Rx5day)
1909
75.0 mm (3.0 in)
1910
39.5 mm (1.6 in)
1911
64.6 mm (2.5 in)
1912
59.6 mm (2.3 in)
1913
67.7 mm (2.7 in)
1914
49.7 mm (2.0 in)
1915
57.2 mm (2.3 in)
1916
66.3 mm (2.6 in)
1917
56.6 mm (2.2 in)
1926
39.4 mm (1.6 in)
1928
205.1 mm (8.1 in)
1929
91.8 mm (3.6 in)
1930
77.9 mm (3.1 in)
1931
59.6 mm (2.3 in)
1932
66.5 mm (2.6 in)
1933
84.1 mm (3.3 in)
1934
60.2 mm (2.4 in)
1935
67.8 mm (2.7 in)
1936
80.3 mm (3.2 in)
1937
46.6 mm (1.8 in)
1938
137.3 mm (5.4 in)
1939
56.3 mm (2.2 in)
1940
93.6 mm (3.7 in)
1941
58.0 mm (2.3 in)
1942
108.5 mm (4.3 in)
1943
103.1 mm (4.1 in)
1944
81.2 mm (3.2 in)
1945
61.8 mm (2.4 in)
1946
82.0 mm (3.2 in)
1947
59.5 mm (2.3 in)
1948
59.9 mm (2.4 in)
1949
101.2 mm (4.0 in)
1950
86.7 mm (3.4 in)
1951
112.7 mm (4.4 in)
1952
71.4 mm (2.8 in)
1953
136.2 mm (5.4 in)
1954
77.1 mm (3.0 in)
1955
110.2 mm (4.3 in)
1956
54.0 mm (2.1 in)
1957
77.9 mm (3.1 in)
1958
65.0 mm (2.6 in)
1959
79.3 mm (3.1 in)
1960
79.3 mm (3.1 in)
1961
89.2 mm (3.5 in)
1962
50.9 mm (2.0 in)
1963
89.1 mm (3.5 in)
1964
103.7 mm (4.1 in)
1965
70.4 mm (2.8 in)
1966
113.9 mm (4.5 in)
1967
55.5 mm (2.2 in)
1968
65.4 mm (2.6 in)
1969
48.3 mm (1.9 in)
1970
65.1 mm (2.6 in)
1971
42.0 mm (1.7 in)
1972
92.5 mm (3.6 in)
1973
60.6 mm (2.4 in)
1974
126.2 mm (5.0 in)
1975
107.8 mm (4.2 in)
1976
95.0 mm (3.7 in)
1977
96.1 mm (3.8 in)
1978
50.0 mm (2.0 in)
1979
48.7 mm (1.9 in)
1980
42.2 mm (1.7 in)
1981
69.5 mm (2.7 in)
1982
160.4 mm (6.3 in)
1983
89.0 mm (3.5 in)
1984
134.9 mm (5.3 in)
1985
88.9 mm (3.5 in)
1986
60.1 mm (2.4 in)
1987
59.1 mm (2.3 in)
1988
62.2 mm (2.4 in)
1989
60.1 mm (2.4 in)
1990
122.7 mm (4.8 in)
1991
48.3 mm (1.9 in)
1992
59.2 mm (2.3 in)
1993
73.9 mm (2.9 in)
1994
76.5 mm (3.0 in)
1995
110.0 mm (4.3 in)
1996
74.5 mm (2.9 in)
1997
74.3 mm (2.9 in)
1998
67.5 mm (2.7 in)
1999
71.7 mm (2.8 in)
2000
111.9 mm (4.4 in)
2001
62.6 mm (2.5 in)
2002
71.8 mm (2.8 in)
2003
58.5 mm (2.3 in)
2004
61.7 mm (2.4 in)
2005
101.2 mm (4.0 in)
2006
41.6 mm (1.6 in)
2007
140.5 mm (5.5 in)
2008
95.1 mm (3.7 in)
2009
82.1 mm (3.2 in)
2010
92.0 mm (3.6 in)
2011
42.4 mm (1.7 in)
2012
82.1 mm (3.2 in)
2013
92.8 mm (3.7 in)
2014
89.9 mm (3.5 in)
2015
45.1 mm (1.8 in)
2016
70.5 mm (2.8 in)
2017
57.9 mm (2.3 in)
2018
55.5 mm (2.2 in)
2019
124.5 mm (4.9 in)
2020
58.0 mm (2.3 in)
2021
124.9 mm (4.9 in)
2022
90.9 mm (3.6 in)
2023
70.6 mm (2.8 in)
2024
55.2 mm (2.2 in)
2025
51.1 mm (2.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Bomnak, 1909 to 2025. The record is 91 days in 1981, marked on the chart; the median year is 42 days.
Longest dry spell (CDD) at Bomnak by year
Year
Longest dry spell (CDD)
1909
27 days
1910
42 days
1911
39 days
1912
37 days
1913
50 days
1914
33 days
1915
50 days
1916
51 days
1917
69 days
1926
69 days
1928
53 days
1929
57 days
1930
35 days
1931
69 days
1932
41 days
1933
84 days
1934
90 days
1935
39 days
1936
42 days
1937
52 days
1938
52 days
1939
67 days
1940
63 days
1941
64 days
1942
37 days
1943
57 days
1944
63 days
1945
87 days
1946
55 days
1947
54 days
1948
32 days
1949
62 days
1950
48 days
1951
50 days
1952
52 days
1953
46 days
1954
27 days
1955
31 days
1956
48 days
1957
43 days
1958
54 days
1959
50 days
1960
40 days
1961
28 days
1962
89 days
1963
38 days
1964
53 days
1965
44 days
1966
33 days
1967
27 days
1968
32 days
1969
41 days
1970
65 days
1971
37 days
1972
30 days
1973
61 days
1974
57 days
1975
35 days
1976
42 days
1977
65 days
1978
56 days
1979
29 days
1980
23 days
1981
91 days
1982
35 days
1983
39 days
1984
62 days
1985
57 days
1986
68 days
1987
30 days
1988
31 days
1989
61 days
1990
37 days
1991
29 days
1992
25 days
1993
49 days
1994
52 days
1995
37 days
1996
31 days
1997
31 days
1998
32 days
1999
35 days
2000
57 days
2001
51 days
2002
28 days
2003
40 days
2004
30 days
2005
37 days
2006
22 days
2007
42 days
2008
41 days
2009
58 days
2010
32 days
2011
46 days
2012
47 days
2013
34 days
2014
33 days
2015
19 days
2016
25 days
2017
44 days
2018
56 days
2019
27 days
2020
23 days
2021
14 days
2022
23 days
2023
22 days
2024
34 days
2025
13 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
82 years with a frost
Across 82 years with a frost, the median last spring frost at Bomnak falls on 24 May and the median first autumn frost on 12 September, which leaves a median of 109 days between them.
In 1985 to 2018 the median growing season was 119 days. That is 16 days more than in 1912 to 1961.
Fitted over all years, the growing season changes by +2.2 days per decade at this station.
Frost dates and growing season at Bomnak
Measure
Median, all years
Earliest period (1912 to 1961)
Recent period (1985 to 2018)
Recent against earliest
Fitted trend
Last spring frost
24 May
28 May
21 May
7 days earlier
-1.2 days per decade
First autumn frost
12 September
9 September
14 September
5 days later
+1.0 days per decade
Growing days
109 days
103 days
119 days
16 days more
+2.2 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
95 years, 1912 to 2018
A day with at least 42.3 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 101.3 mm (4.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Bomnak: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
42.3 mm (1.7 in)
5 years
55.8 mm (2.2 in)
10 years
65.6 mm (2.6 in)
25 years
79.0 mm (3.1 in)
50 years
89.9 mm (3.5 in)
100 years
101.3 mm (4.0 in)
Longer than the 95 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, 95 years of values from 1912 to 2018.
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: 101.2 mm (4.0 in) in 1955; 93.0 mm (3.7 in) in 1938; 87.6 mm (3.4 in) in 1982.
Climate Twins
2002 to 2018 against 1961 to 1990
Over 2002 to 2018, Bomnak had a mean temperature of -3.1 C (26.4 F) and 572.1 mm (22.5 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Dzalinda (Russia, 351 km away), Norsk (Russia, 272 km away) and Verhnjaja Tom (Russia, 389 km away).
Climate twins of Bomnak: stations whose 1961 to 1990 climate is closest to its 2002 to 2018 climate
Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.
Download the Data
Data for Bomnak standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Bomnak 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 2026-10-12 (12 October 2026). Records are computed by this site and are not official.