Boulder Record Low by Day of the Year
Data for the record low temperature for each day of the year in
Boulder, Colorado , as well as the year that the record was set. It is based on NOAA data for the years 1893–2024.
Change city
Day
Record Low
Year Set or Tied
January 1 -14
1924, 1942
January 2 -14
1911
January 3 -10
1911
January 4 -14
1959
January 5 -13
1942
January 6 -20
1913
January 7 -22
1913
January 8 -16
1937
January 9 -11
1962, 1973
January 10 -13
1962
January 11 -18
1963
January 12 -22
1963
January 13 -12
1997
January 14 -9
1972
January 15 -11
2024
January 16 -14
2024
January 17 -33
1930
January 18 -19
1984
January 19 -17
1963
January 20 -15
1935
January 21 -18
1930
January 22 -11
1917
January 23 -10
1963
January 24 -8
1949
January 25 -8
1902
January 26 -20
1902
January 27 -7
1895
January 28 -9
1902
January 29 -12
1951
January 30 -7
2023
January 31 -9
1985
February 1 -15
1951
February 2 -17
2011
February 3 -17
1989
February 4 -18
1989
February 5 -24
1989
February 6 -16
1914
February 7 -19
1933
February 8 -28
1936
February 9 -16
1933
February 10 -15
1933
February 11 -15
1905
February 12 -20
1905
February 13 -9
1895, 1905
February 14 -8
2021
February 15 -12
1903, 2021
February 16 -11
1900
February 17 -11
1936
February 18 -14
2006
February 19 -4
2006
February 20 -6
2018
February 21 -4
2018
February 22 -2
2022
February 23 -13
2023
February 24 -5
2023
February 25 -6
1935
February 26 -6
1962
February 27 -8
1962
February 28 -11
1962
March 1 -11
1922
March 2 -8
1943
March 3 -4
1943
March 4 -5
2019
March 5 -2
1948
March 6 -8
1943
March 7 -8
1943
March 8 -1
1932, 1998
March 9 -13
1932
March 10 -7
1932
March 11 -9
1932
March 12 -10
1932
March 13 0
1895
March 14 -2
1895
March 15 2
1906
March 16 -4
1906
March 17 0
1924
March 18 -5
1923
March 19 -1
1965
March 20 -3
1927
March 21 -1
1914
March 22 0
1898
March 23 3
1898
March 24 2
1965
March 25 -2
1996
March 26 -1
1955
March 27 -5
1899, 1931
March 28 -2
1975
March 29 4
1975
March 30 6
1926
March 31 1
1899
April 1 7
1936
April 2 -3
1975
April 3 12
1945
April 4 9
1945
April 5 5
1939
April 6 4
1938
April 7 13
1983
April 8 9
1928, 1973
April 9 8
1973
April 10 2
2013
April 11 9
1940
April 12 2
1997
April 13 12
2022
April 14 10
2020
April 15 15
1945
April 16 17
1999
April 17 9
2020
April 18 10
2013
April 19 13
1966
April 20 10
2021
April 21 14
1907
April 22 18
1920
April 23 19
2023
April 24 18
2013
April 25 20
1924
April 26 15
1924
April 27 22
1924, 1994
April 28 23
1917, 1984
April 29 21
1903
April 30 19
1909
May 1 23
1909
May 2 17
2013
May 3 20
1907
May 4 28
1935, 1944
May 5 29
1908, 1950
May 6 22
1917
May 7 28
2010
May 8 30
2010
May 9 25
2002
May 10 27
1946
May 11 21
1946
May 12 24
1953
May 13 27
1953
May 14 29
1907
May 15 29
1916
May 16 30
1923
May 17 28
1942
May 18 29
1915, 1930
May 19 26
1915
May 20 27
1931
May 21 26
2001
May 22 30
2022
May 23 34
1930, 1995
May 24 32
1995, 2002
May 25 32
1950
May 26 32
1950
May 27 33
1950
May 28 30
1908, 1947
May 29 30
1947
May 30 34
1973
May 31 34
1917
June 1 33
1917
June 2 30
1907, 1951
June 3 32
1951
June 4 36
1937
June 5 33
1937, 1998
June 6 33
1983, 1998
June 7 32
1917
June 8 34
2007
June 9 37
2014
June 10 34
1906
June 11 34
1906
June 12 32
1935, 1947
June 13 26
1935
June 14 25
1935
June 15 34
1935
June 16 22
1935
June 17 34
1903
June 18 28
1935
June 19 32
1935
June 20 20
1935
June 21 24
1935
June 22 38
1935
June 23 39
1935
June 24 33
1935
June 25 29
1935
June 26 31
1935
June 27 33
1935
June 28 30
1935
June 29 28
1935
June 30 41
1935
July 1 45
1945
July 2 45
1915
July 3 43
1903, 1922
July 4 40
1903, 1921
July 5 42
1972
July 6 44
1931
July 7 41
1904
July 8 44
1931
July 9 46
1911, 1929
July 10 46
1895
July 11 44
1895
July 12 47
1895, 1922
July 13 44
1987
July 14 47
1973
July 15 47
1973
July 16 47
1992
July 17 46
1992
July 18 49
1972
July 19 46
1902
July 20 45
1900
July 21 48
1897, 1915, 1988, 1995
July 22 47
1973, 1990
July 23 47
1990
July 24 49
1911, 2004
July 25 49
1926, 1973, 1980
July 26 48
1926
July 27 48
1913, 1981
July 28 52
1894, 1905, 1911, 1981, 1992, 1993, 2009
July 29 46
1971
July 30 45
1971
July 31 47
2009
August 1 44
1995
August 2 41
1894
August 3 49
1915
August 4 45
1927
August 5 47
1911, 1928
August 6 50
1911, 1921
August 7 47
1939
August 8 46
1939
August 9 45
1939
August 10 40
1912
August 11 47
1974
August 12 47
2004
August 13 44
2002, 2004
August 14 48
2004
August 15 47
1978
August 16 47
1975, 2009
August 17 45
2008
August 18 48
1987
August 19 43
1939
August 20 43
2016
August 21 44
1920
August 22 46
1904, 1945, 1966
August 23 44
2015
August 24 45
1968
August 25 43
1934, 1972
August 26 44
1894, 1992
August 27 42
1992
August 28 40
2004
August 29 44
2004
August 30 46
1944, 1964
August 31 42
1932
September 1 40
1908
September 2 36
1974
September 3 33
1961
September 4 39
1961
September 5 40
1968
September 6 38
1929
September 7 34
1929
September 8 32
2020
September 9 30
2020
September 10 35
1898, 1962, 2020
September 11 34
1898
September 12 31
1974
September 13 31
1993
September 14 28
1993
September 15 30
1903
September 16 30
1912
September 17 27
1965
September 18 30
1971
September 19 22
1971
September 20 29
1983
September 21 26
1983
September 22 23
1995
September 23 31
1985, 2000
September 24 30
1926
September 25 24
1926, 1934
September 26 28
1926, 1927, 1934, 1942
September 27 24
1908, 1996
September 28 23
1945
September 29 18
1985
September 30 15
1985
October 1 23
1985
October 2 27
1959
October 3 30
1927, 2009
October 4 30
1950
October 5 27
1991
October 6 28
1995, 2009
October 7 23
1970
October 8 22
1970
October 9 24
1990
October 10 15
2009
October 11 15
2019
October 12 20
1969
October 13 10
1969
October 14 13
1969
October 15 13
2018
October 16 20
1969
October 17 15
1999
October 18 19
1925
October 19 17
1916, 1925
October 20 19
1916
October 21 17
1911
October 22 19
1906, 1936
October 23 21
2008
October 24 19
1975, 1980
October 25 10
2020
October 26 5
2020
October 27 4
2020
October 28 11
1925
October 29 -2
1917
October 30 3
2019
October 31 3
2019
November 1 10
1951
November 2 -2
1951
November 3 1
1991
November 4 14
1967
November 5 6
1933
November 6 11
1938
November 7 9
1990
November 8 17
1990
November 9 5
1950
November 10 -3
1950
November 11 -2
1911
November 12 -2
1911
November 13 -11
2014
November 14 -2
1916
November 15 1
1997
November 16 -1
2014
November 17 4
1903
November 18 2
1903
November 19 5
2022
November 20 3
1906
November 21 0
1929
November 22 -7
1929
November 23 -2
2003
November 24 -2
1993
November 25 -8
1993
November 26 -1
1919
November 27 -12
1919
November 28 -12
1919
November 29 1
1919
November 30 0
1975, 2006
December 1 -5
1985
December 2 -9
1919
December 3 -2
1919
December 4 -1
1909, 2009
December 5 -12
1972
December 6 -16
1972
December 7 -15
1927
December 8 -9
1932
December 9 -20
1919
December 10 -12
1932
December 11 -18
1932
December 12 -19
1932
December 13 -10
1926
December 14 -11
1901, 1926
December 15 -15
2008
December 16 -7
2008
December 17 -9
1964
December 18 -14
1909
December 19 -17
1924
December 20 -16
1924
December 21 -20
1990
December 22 -24
1990
December 23 -14
2022
December 24 -18
1924
December 25 -10
1983
December 26 -6
1916
December 27 -10
1916
December 28 -8
1924, 1983
December 29 -13
1990
December 30 -11
1990
December 31 -18
1923
Years with the Most Daily Records
Which years set the greatest number of daily low temperature records in Boulder history?
Rank
Year
Records Set
1
1935
21
2
1932
10
3
1911
10
4
1990
9
5
1924
9
6
2020
8
7
1973
8
8
1926
8
9
1903
8
10
2009
7
Daily Records by Decade
This table shows the number of daily low temperature records in Boulder that were set in each decade since 1893.
Decade
Records Set
1890s
17
1900s
39
1910s
42
1920s
42
1930s
60
1940s
24
1950s
18
1960s
26
1970s
30
1980s
24
1990s
38
2000s
27
2010s
19
2020s
22
Weather Station Details
Years
Station
Coordinates
1893–2024
Boulder
location