PITTSBURGH COLD TEMPERATURES
Based on a record January 1871 through last month
LONGEST PERIODS WITH TEMPERATURES ZERO DEGREES OR LOWER
(consecutive hours)
52 Hours 6am Jan 18, 1994 - 10am Jan 20, 1994 Lowest -22
51 Hours 6am Dec 24, 1983 - 9am Dec 26, 1983 Lowest -12
50 Hours 10am Jan 16, 1977 - 12pm Jan 18, 1977 Lowest -17
41 Hours 8pm Jan 22, 1936 - 12pm Jan 24, 1936 Lowest -16
37 Hours 10pm Jan 23, 1963 - 10am Jan 25, 1963 Lowest -18
37 Hours 10pm Jan 7, 1970 - 11am Jan 9, 1970 Lowest -5
37 Hours 12am Jan 10, 1982 - 11am Jan 11, 1982 Lowest -9
35 Hours 6pm Jan 16, 1982 - 5am Jan 18, 1982 Lowest -18
LONGEST PERIODS WITH TEMPERATURES 32 DEGREES OR LOWER
(consecutive days)
33 Days Dec 26, 1976 through Jan 27, 1977
26 Days Jan 25, 1979 through Feb 19, 1979
22 Days Jan 8, 1985 through Jan 29, 1985
22 Days Dec 7, 1989 through Dec 28, 1989
17 Days Feb 29, 1960 through Mar 16, 1960
LONGEST PERIODS WITH MINIMUM TEMPERATURES ZERO OR LOWER
(consecutive days)
7 Days Feb 8-14, 1899 Lowest -20
6 Days Jan 22-27, 1936 Lowest -16
4 Days Jan 18-21, 1994 Lowest -22
4 Days Jan 6 - 9, 1942 Lowest -9
4 Days Dec 21-24, 1989 Lowest -12
4 Days Dec 16-19, 1989 Lowest -7
Coldest Days on Record
Lowest Temperatures on Record (Lowest Mean Temps)
-22 Jan 19, 1994 -13 Jan 19, 1994
-20 Feb 10, 1899 -11 Jan 17, 1982
-18 Jan 20, 1985 -11 Feb 10, 1899
-18 Jan 21, 1985 -10 Jan 17, 1977
-18 Jan 17, 1982 -10 Jan 24, 1963
-18 Jan 24, 1963 -9 Jan 23, 1936
-17 Jan 17, 1977 -9 Jan 20, 1985
-16 Jan 18, 1994 -6 Jan 3, 1879
-16 Jan 23, 1936 -6 Jan 21, 1985
-15 Jan 21, 1984 -6 Feb 9, 1899
-14 Jan 22, 1936 -6 Dec 25, 1983
-14 Jan 16, 1977 -5 Dec 30, 1880
-13 Jan 16, 1982 -5 Jan 10, 1982
-12 Jan 10, 1875 -12 Dec 25, 1983 -4 Feb 11, 1885
-12 Jan 3, 1879 -12 Dec 22, 1989 -3 Jan 8, 1970
-12 Feb 11, 1979 -12 Jan 21. 1994 -3 Jan 19, 1940
LOWEST MAXIMUM TEMPERATURES ON RECORD
-3 Jan 19, 1994
-3 Jan 17, 1982
-3 Feb 9, 1899
-2 Feb 10, 1899
-2 Jan 23, 1936
-2 Jan 24, 1963
-2 Jan 17, 1977
0 Jan 8, 1942
0 Jan 10, 1982
0 Dec 25, 1983
0 Jan 8, 1970
+1 Jan 3, 1879
+1 Jan 20, 1985
+2 Feb 8, 1895
COLDEST MONTHS ON RECORD COLDEST YEARS ON RECORD
(monthly average) (annual average)
11.4 January 1977 48.0 1976
17.4 January 1940 48.2 1963
18.0 February 1979 48.8 1958
18.6 January 1918 49.0 1875
19.2 December 1989 49.1 1960
19.3 February 1963 49.1 1968
19.7 February 1934 49.1 1981
20.4 January 1912 49.3 1917
20.5 January 1981 49.3 1977
20.7 January 1970 49.4 1979
20.8 February 1875 49.4 1962
20.9 January 1982 49.5 1980
20.9 February 1978 49.6 1940
MISCELLANEOUS STATISTICS
Minimum temperature below zero about 5 times a year
Maximum temperature zero or lower about once every 10 years or
9% chance in a year.
Minimum temperature below -10 about once every 5 years or
18% chance in a year
COLDEST DAYS EVER FOR EACH MONTH
(Based on daily mean temperatures)
JANUARY FEBRUARY MARCH
-13 Jan 19 1994 -11 Feb 10 1899 8 Mar 1 1980
-11 Jan 17 1982 -6 Feb 9 1899 8 Mar 3 1943
-10 Jan 24 1963 -4 Feb 11 1885 8 Mar 17 1900
-10 Jan 17 1977 -2 Feb 17 1958 9 Mar 2 1980
-9 Jan 23 1936 -1 Feb 22 1963 9 Mar 6 1901
-9 Jan 20 1985 -1 Feb 8 1895 9 Mar 9 1932
APRIL MAY JUNE
20 Apr 18 1875 36 May 8 1947 44 Jun 1 1910
22 Apr 17 1875 36 May 9 1966 45 Jun 5 1945
24 Apr 14 1950 39 May 11 1966 47 Jun 4 1945
24 Apr 13 1950 39 May 10 1966 47 Jun 2 1956
24 Apr 1 1923 39 May 4 1957 48 Jun 3 1956
25 Apr 5 1944 39 May 3 1929 49 Jun 7 1977
25 Apr 7 1982 39 May 1 1963
25 Apr 8 1972
JULY AUGUST SEPTEMBER
57 Jul 5 1979 54 Aug 29 1965 42 Sep 28 1942
57 Jul 9 1963 56 Aug 31 1935 42 Sep 30 1899
58 Jul 10 1963 56 Aug 27 1885 43 Sep 20 1956
58 Jul 4 1882 56 Aug 25 1987 44 Sep 26 1928
58 Jul 1 1933 56 Aug 19 1977 45 Sep 29 1888
59 Jul 8 1984 56 Aug 14 1964 45 Sep 24 1950
56 Aug 15 1979 45 Sep 21 1962
56 Aug 13 1964
OCTOBER NOVEMBER DECEMBER
29 Oct 29 1965 8 Nov 30 1929 -6 Dec 25 1983
30 Oct 27 1976 10 Nov 29 1929 -5 Dec 30 1880
30 Oct 26 1962 12 Nov 28 1930 -3 Dec 22 1989
32 Oct 31 1917 13 Nov 27 1930 0 Dec 10 1917
32 Oct 28 1976 13 Nov 16 1933 +1 Dec 29 1880
32 Oct 24 1937 14 Nov 22 1880 +1 Dec 24 1983
+1 Dec 16 1951
COLDEST TEMPERATURES EVER RECORDED BY MONTH
(Minimum Temperatures)
JANUARY FEBRUARY MARCH
-22 Jan 19 1994 -20 Feb 10 1899 -1 Mar 2 1980
-18 Jan 20 1985 -12 Feb 11 1979 -1 Mar 4 1943
-18 Jan 21 1985 -11 Feb 5 1918 -1 Mar 9 1960
-18 Jan 24 1963 -11 Feb 9 1934 0 Mar 3 1943
-18 Jan 17 1982 -10 Feb 15 1875 0 Mar 11 1960
-17 Jan 17 1977 -10 Feb 17 1979 +1 Mar 15 1993 +1 Mar 17 1900
APRIL MAY JUNE
11 Apr 1 1923 26 May 7 1970 34 Jun 11 1972
14 Apr 8 1982 26 May 2 1963 36 Jun 5 1990
14 Apr 18 1875 27 May 10 1966 36 Jun 1 1966
15 Apr 14 1950 27 May 1 1876 36 Jun 2 1966
15 Apr 9 1977 29 May 6 1968 39 Jun 22 1992
16 Apr 17 1875 39 Jun 8 1977
39 Jun 7 1977
JULY AUGUST SEPTEMBER
42 Jul 9 1963 39 Aug 29 1982 31 Sep 19 1959
44 Jul 27 1977 42 Aug 31 1976 33 Sep 24 1974
45 Jul 20 1965 43 Aug 30 1986 33 Sep 23 1962
45 Jul 10 1963 43 Aug 19 1977 33 Sep 17 1959
45 Jul 8 1984 43 Aug 18 1981 34 Sep 28 1989
43 Aug 15 1964 34 Sep 27 1957
34 Sep 21 1962
OCTOBER NOVEMBER DECEMBER
16 Oct 29 1965 -1 Nov 30 1958 -12 Dec 22 1989
20 Oct 31 1887 4 Nov 29 1976 -12 Dec 25 1983
20 Oct 20 1972 4 Nov 22 1880 -11 Dec 24 1983
21 Oct 24 1969 7 Nov 27 1930 -9 Dec 30 1880
22 Oct 28 1976 7 Nov 25 1950 -7 Dec 18 1989
22 Oct 27 1979 7 Nov 21 1880 -7 Dec 3 1976
COLDEST AVERAGES FOR EACH MONTH
(Based on monthly mean temperatures)
JANUARY FEBRUARY MARCH
11.4 January 1977 18.0 February 1979 26.0 March 1960
17.4 January 1940 19.3 February 1963 30.7 March 1872
18.6 January 1918 19.7 February 1934 31.4 March 1941
20.4 January 1912 20.8 February 1875 32.0 March 1885
20.5 January 1981 20.9 February 1978 32.2 March 1984
20.7 January 1970 22.1 February 1947 32.6 March 1947
20.9 January 1982 22.2 February 1968 33.0 March 1896
21.1 January 1994 22.7 February 1958 33.2 March 1915
21.1 January 1963 22.8 February 1895 33.6 March 1940
21.4 January 1979 22.9 February 1936 33.6 March 1932
21.6 January 1893 23.6 February 1885 33.8 March 1926
21.7 January 1948 24.2 February 1980 33.8 March 1906
22.0 January 1945 24.3 February 1914 34.0 March 1883
22.1 January 1985 24.6 February 1905 34.1 March 1916
22.2 January 1961 24.6 February 1901 34.3 March 1900
22.6 January 1978 24.7 February 1912 34.3 March 1971
22.6 January 1936 25.4 February 1899 34.3 March 1969
22.6 January 1875 25.6 February 1967 34.4 March 1937
23.1 January 1966 25.6 February 1942 34.7 March 1996
23.2 January 1984 25.8 February 1904 34.8 March 1950
APRIL MAY JUNE
41.8 April 1874 54.2 May 1997 63.7 June 1982
43.8 April 1907 54.3 May 1967 63.8 June 1977
44.0 April 1961 54.6 May 1917 63.8 June 1972
44.2 April 1943 54.7 May 1968 64.2 June 1985
44.3 April 1975 55.2 May 1961 64.2 June 1958
44.9 April 1926 55.3 May 1984 64.6 June 1927
45.2 April 1873 55.4 May 1924 65.1 June 1961
45.3 April 1982 55.6 May 1976 65.1 June 1955
45.4 April 1936 55.8 May 1983 65.2 June 1974
45.9 April 1950 56.1 May 1966 65.3 June 1916
46.0 April 1971 56.2 May 1954 65.8 June 1907
46.4 April 1997 56.2 May 1925 65.8 June 1903
46.4 April 1904 56.4 May 1907 66.0 June 1992
46.6 April 1940 56.4 May 1973 66.1 June 1928
46.6 April 1928 56.4 May 1945 66.2 June 1980
46.6 April 1875 56.5 May 1963 66.4 June 1926
46.8 April 1953 56.6 May 1971 66.5 June 1960
47.0 April 1956 56.7 May 1994 66.9 June 1878
47.0 April 1920 57.2 May 1882 66.9 June 1965
47.0 April 1989 57.5 May 1960 66.9 June 1968
JULY AUGUST SEPTEMBER
67.4 July 1976 65.3 August 1976 58.6 September 1962
68.5 July 1984 67.0 August 1927 58.8 September 1975
68.6 July 1960 67.1 August 1964 59.3 September 1871
68.8 July 2000 67.4 August 1946 59.8 September 1918
69.6 July 1996 67.7 August 1963 59.9 September 1976
69.9 July 1965 68.1 August 1977 60.4 September 1956
70.0 July 1891 68.2 August 1929 61.0 September 1949
70.0 July 1947 68.2 August 1982 61.1 September 1967
70.1 July 1962 68.2 August 1997 61.2 September 1928
70.2 July 1971 68.8 August 1967 61.3 September 1966
70.3 July 1956 68.8 August 1912 61.3 September 1963
70.3 July 1979 69.0 August 1999 61.4 September 1984
70.4 July 1920 69.1 August 2000 61.4 September 1924
70.5 July 1985 69.1 August 1965 61.6 September 1888
70.5 July 1961 69.1 August 1915 61.6 September 1875
70.6 July 1950 69.3 August 1874 61.9 September 1981
70.8 July 1963 69.6 August 1985 62.1 September 1997
71.1 July 1924 69.6 August 1979 62.1 September 1917
71.2 July 1909 69.6 August 1971 62.2 September 1974
71.2 July 1972 69.6 August 1958 62.5 September 1940
OCTOBER NOVEMBER DECEMBER
45.9 October 1976 33.1 November 1976 19.2 December 1989
46.6 October 1988 35.3 November 1873 22.4 December 1963
47.2 October 1925 35.7 November 1880 23.0 December 1958
47.8 October 1987 35.8 November 1872 23.4 December 1960
48.1 October 1965 36.3 November 1996 23.4 December 1876
48.4 October 1972 36.8 November 1967 23.9 December 1976
48.9 October 1917 37.1 November 1910 24.1 December 1962
49.1 October 1978 37.4 November 1951 24.5 December 1917
49.2 October 1952 38.1 November 1995 24.8 December 1935
49.4 October 1981 38.2 November 1936 24.8 December 1972
49.5 October 1980 38.2 November 1871 25.4 December 1983
49.6 October 1909 38.2 November 1875 26.7 December 1969
49.6 October 1876 38.3 November 1950 26.7 December 1880
49.6 October 1957 38.6 November 1980 26.8 December 1945
49.8 October 1895 38.9 November 1955 26.8 December 1909
49.8 October 1888 39.0 November 1997 27.0 December 1910
50.0 October 1907 39.0 November 1959 27.0 December 1878
50.1 October 1992 39.2 November 1901 27.4 December 1985
50.1 October 1937 39.2 November 1969 27.5 December 1950
50.4 October 1873 39.2 November 1947 27.6 December 1944
COLDEST TEMPERATURES SO LATE COLDEST TEMPERATURES SO EARLY
IN THE SPRING SEASON IN THE AUTUMN SEASON
34 Jun 11 1972 33 Sep 17 1959
33 May 25 1925 31 Sep 19 1959
30 May 24 1963 30 Oct 1 1899
27 May 10 1966 27 Oct 6 1965
26 May 7 1970 26 Oct 12 1964
24 Apr 27 1971 25 Oct 16 1876
22 Apr 22 1875 20 Oct 20 1972
19 Apr 19 1983 16 Oct 29 1965
14 Apr 18 1875 15 Nov 4 1991
11 Apr 1 1923 11 Nov 5 1991
9 Mar 25 1974 10 Nov 14 1986
6 Mar 22 1886 9 Nov 16 1933
5 Mar 21 1885 8 Nov 18 1959
2 Mar 18 1877 7 Nov 21 1880
1 Mar 17 1900 -1 Nov 30 1958
0 Mar 11 1960 -7 Dec 3 1976
-1 Mar 9 1960 -12 Dec 22 1989
-3 Feb 29 1884 -14 Jan 16 1977
-9 Feb 27 1963 -18 Jan 17 1982
-10 Feb 17 1979 -22 Jan 19 1994
-12 Feb 11 1979
-20 Feb 10 1899
FROST INFORMATION
Normals
Average date of last killing frost in spring April 21
Average date of first killing frost in Autumn October 20
Average length of growing season 182 days
Records
Latest date of killing frost is spring May 29 1894
Earliest date of killing frost in autumn September 17 1959
Latest date of killing frost in autumn November 11 1994
Shortest growing season 131 days May 29 1894 - Oct 7 1894
Longest growing season 215 days Apr 1 1901 - Nov 2 1901
215 days Apr 8 1902 - Nov 9 1902
COLDEST WINTERS COLDEST SPRINGS
(average Dec/Jan/Feb temp) (average Mar/Apr/May temp)
20.7 1976-77 1. 45.6 1984
23.4 1935-36 2. 45.6 1971
23.9 1962-63 3. 45.8 1960
24.0 1978-79 4. 46.5 1940
24.9 1977-78 5. 46.8 1961
25.0 1969-70 6. 47.0 1997
25.3 1917-18 7. 47.2 1874
26.0 1874-75 8. 47.3 1873
26.0 1960-61 9. 47.4 1924
26.2 1981-82 10. 47.6 1956
26.2 1981-82 11. 47.6 1950
26.7 1958-59 12. 47.6 1943
26.8 1980-81 13. 47.8 1947
26.8 1967-68 14. 47.9 1983
26.9 1963-64 15. 47.9 1975
26.9 1919-20 16. 47.9 1937
27.2 1939-40 17. 47.9 1875
27.2 1944-45 18. 48.0 1980
27.3 1904-05 19. 48.0 1932
27.4 1993-94 20. 48.1 1928
27.6 1872-73 21.
COLDEST SUMMERS COLDEST AUTUMNS
(average Jun/Jul/Aug temp) (average Sep/Oct/Nov temp)
67.0 1976 1. 46.3 1976
67.9 1977 2. 49.6 1873
68.1 1985 3. 50.1 1967
68.1 1982 4. 50.1 1875
68.2 1927 5. 50.3 1917
68.3 1965 6. 50.5 1982
68.5 1972 7. 50.7 1937
68.6 1963 8. 50.8 1872
68.8 1992 9. 50.8 1871
68.8 1960 10. 51.0 1972
68.9 1961 11. 51.0 1962
68.9 1958 12. 51.2 1997
69.1 1964 13. 51.3 1943
69.2 2000 14. 51.4 1988
69.2 1979 15. 51.4 1965
69.3 1997 16. 51.6 1966
69.4 1915 17. 51.7 1980
69.4 1907 18. 51.7 1969
69.6 1956 19. 51.7 1880
69.6 1946 20. 51.8 1876
69.7 1984 21. 52.2 1992
69.8 1912 22. 52.2 1888