PITTSBURGH PRECIPITATION RECORDS
Based on an incomplete record from March 1836, updated monthly.

 

DRIEST MONTHS ON RECORD               WETTEST MONTHS ON RECORD

0.06"  October 1874         1.        11.05"  November 1985
0.07"  February 1841        2.        10.29"  June 1989
0.12"  October 1924         3.        10.25"  June 1951
0.13"  October 1897         4.        10.08"  September 1945
0.16"  October 1963         5.        10.06"  September 2004
0.22"  November 1904        6.         9.51"  July 1887
0.28"  November 1917        7.         9.27"  April 1852
0.28"  September 1985       8.         8.96"  July 1896
0.35"  January 1851         9.         8.71"  July 1992
0.37"  March 1910          10.         8.51"  December 1990
0.38"  November 2012       11.         8.29"  August 1864
0.38"  October 1901        12.         8.25"  September 1864
0.39"  October 1887        13.         8.20"  June 1981
0.40"  October 1982        14.         8.20"  October 1954
0.40"  December 1955       15.         8.11"  April 1901
0.42"  May 1911            16.         7.99"  July 1943


DRIEST YEARS ON RECORD                WETTEST YEARS ON RECORD

     22.65"  1930           1.            57.41"  2004 
     25.32"  1839           2.            52.24"  1990
     25.73"  1900           3.            50.61"  1890
     25.89"  1932           4.            50.50"  1865
     26.59"  1856           5.            48.38"  1950
     26.67"  1854           6.            48.20"  1945
     26.79"  1963           7.            47.79"  1846
     27.09"  1988           8.            46.42"  1975
     27.50"  1895           9.            46.22"  1847
     28.17"  1894          10.            45.47"  1996
     28.18"  1925          11.            45.15"  1951 
     28.64"  1840          12.            45.00"  1864
     28.89"  1995          13.
               
    

	GREATEST DAILY PRECIPITATION ON RECORD

             5.95"  September 17, 2004 (Hurricane Ivan)
             3.60"  September 8, 2004  (Hurricane Frances)
             3.57"  August 21, 1888    (Hurricane)
             3.56"  October 15, 1954   (Hurricane Hazel)
             3.48"  July 28, 1999      (Thunderstorms from NE Ohio)
             3.38"  September 17, 1876 (Hurricane)
             3.24"  September 12, 1878 (Hurricane)
             3.22"  October 2, 1929    (Hurricane)

             
	GREATEST AND LEAST AMOUNTS OF MONTHLY PRECIPITATION

         JANUARY                              FEBRUARY
  least           most                  least             most
0.35"  1851    7.15"  1937           0.07"  1841       6.52"  1887
0.43"  1859    6.25"  1978           0.50"  1858       6.09"  1891
0.77"  1981    6.17"  1888           0.51"  1969       5.98"  1956
0.88"  1940    6.12"  2005           0.54"  1978       5.52"  1890
1.06"  1967    5.67"  1950           0.71"  1987       5.45"  2008
1.12"  1946    5.58"  1907           0.74"  1907       4.97"  2011
1.15"  1858    5.33"  1910           0.77"  1895       4.92"  1883
1.16"  1931    5.28"  1913           0.79"  1968       4.74"  1893
1.19"  1983    4.90"  1951           0.80"  1941       4.64"  1975
1.26"  1944    4.88"  1999           0.82"  1932       4.57"  1884
               4.82"  1884

        MARCH                                    APRIL
  least           most                  least             most
0.37"  1910    6.10"  1967           0.48"  1971       9.27"  1852
0.99"  1858    5.97"  1945           0.83"  1849       8.11"  1901
1.03"  1857    5.88"  1936           1.00"  1837       7.61"  1964
1.11"  1853    5.84"  1922           1.04"  1888       7.20"  1874
1.14"  1969    5.77"  1933           1.09"  1872       6.56"  1860
1.17"  1893    5.65"  1980           1.11"  1884       6.03"  1948
1.19"  1860    5.52"  1989           1.15"  1946       5.62"  1937
1.24"  1999    5.50"  1944           1.16"  1932       5.42"  1911
1.25"  1918    5.45"  1898           1.18"  1891       5.30"  1987
1.26"  1915    5.31"  1877           1.24"  1976       5.26"  1940


           MAY                                    JUNE
  least           most                  least             most
0.42"  1911    6.60"  1858           0.61"  1894      10.29"  1989
0.66"  1934    6.56"  1989           0.64"  1992      10.25"  1951
0.98"  1871    6.55"  1933           0.78"  1932       8.20"  1981
1.01"  1936    6.45"  1889           0.90"  1967       7.95"  1996
1.03"  1920    6.36"  1968           1.04"  1913       7.73"  1928
1.09"  1928    6.34"  1857           1.14"  1908       7.58"  1855
1.18"  1845    6.33"  1997           1.16"  1933       7.50"  1837
1.20"  1879    6.19"  1990           1.20"  1926       6.95"  1881
1.21"  1965    6.14"  2003           1.24"  2012       6.74"  1920
1.25"  1880    6.08"  2004           1.26"  1988       6.71"  1998

            
          JULY                                 AUGUST
  least           most                  least             most
1.16"  1894    9.51"  1887           0.43"  1894       8.29"  1864
1.22"  1909    8.96"  1896           0.55"  1951       7.86"  1987
1.26"  1910    8.71"  1992           0.78"  1957       7.75"  1994
1.26"  1849    7.99"  1943           0.84"  1900       7.56"  1975
1.33"  1930    7.78"  1879           0.88"  1881       7.47"  1934
1.42"  1863    7.77"  1872           0.96"  1925       7.26"  1888
1.45"  1854    7.68"  1874           0.98"  1981       7.15"  1919
1.57"  1840    7.65"  1891           1.10"  1930       7.12"  2001
1.62"  1989    7.43"  1958           1.12"  1989       6.84"  1979
1.70"  1837    7.32"  2012           1.13"  1854       6.77"  1955

        SEPTEMBER                              OCTOBER
  least           most                  least             most
0.28"  1985   10.08"  1945           0.06"  1874       8.20"  1954
0.57"  1937   10.06"  2004           0.12"  1924       6.21"  1873
0.59"  1932    8.25"  1864           0.13"  1897       5.94"  1959
0.69"  1914    7.56"  1865           0.16"  1963       5.66"  1890
0.71"  1908    7.50"  1866           0.38"  1901       5.37"  1919
0.71"  1943    7.45"  1926           0.39"  1887       5.27"  1917
0.74"  1964    7.35"  1876           0.40"  1982       5.07"  1929
0.74"  1930    6.44"  1843           0.46"  1933       4.94"  1911
0.76"  1909    6.36"  1911           0.51"  1892       4.90"  1866
0.76"  1881    6.00"  1990           0.55"  1991       4.84"  2006

         NOVEMBER                              DECEMBER
  least           most                  least             most
0.22"  1904   11.05"  1985           0.40"  1955       8.51"  1990
0.28"  1917    7.29"  1950           0.44"  1861       6.22"  1923
0.38"  2012    5.99"  1997           0.63"  1965       6.16"  1944
0.53"  1939    5.97"  2010           0.83"  1876       5.64"  1890
0.69"  1908    5.18"  1927           0.89"  1938       5.61"  1942
0.80"  1912    5.11"  1897           1.10"  1958       5.53"  2012
0.83"  1872    5.07"  1855           1.14"  1943       5.24"  1978
0.84"  1909    5.06"  1921           1.18"  1928       5.16"  1846
0.90"  1976    4.91"  1886           1.19"  1947       5.01"  1852
0.95"  1906    4.70"  1972           1.19"  1917       5.00"  1879
            

	GREATEST DAILY PRECIPITATION BY MONTH
	(24 hour precipitation totals)

     JANUARY                 FEBRUARY                 MARCH
2.34"  Jan  8, 1884     2.29"  Feb 23, 1975     2.58"  Mar  6, 1945
1.81"  Jan  5, 2005     2.01"  Feb 26, 1887     1.82"  Mar  9, 1964
1.64"  Jan 21, 1917     1.72"  Feb 13, 1966     1.78"  Mar 17, 1936
1.52"  Jan 26, 1952     1.72"  Feb 24, 1930     1.75"  Mar  4, 1963
1.32"  Jan  1, 1932     1.64"  Feb 16, 1891     1.66"  Mar  3, 1943
1.24"  Jan 30, 1939     1.45"  Feb  6, 1897     1.66"  Mar 26, 1913
       Jan 16, 1885

      APRIL                    MAY                     JUNE
2.34"  Apr 14, 1922     2.48"  May 25, 1997     3.19"  Jun 16, 1912
2.24"  Apr 20, 1901     2.31"  May 24, 1973     3.11"  Jun 24, 1996
2.05"  Apr  3, 1901     2.27"  May 11, 1889     2.96"  Jun 20, 1987
1.88"  Apr  9, 1942     2.12"  May  5, 1950     2.92"  Jun 17, 2009
1.82"  Apr 28, 1874     2.05"  May 12, 1980     2.52"  Jun  9, 1881
1.59"  Apr 27, 1948     2.00"  May 28, 2000     2.38"  Jun 24, 1950


      JULY                   AUGUST                  SEPTEMBER
3.48"  Jul 28, 1999     3.57"  Aug 21, 1888     5.95"  Sep 17, 2004
3.20"  Jul 26, 1921     3.06"  Aug  5, 1956     3.60"  Sep  8, 2004
2.96"  Jul 11, 1971     2.92"  Aug 26, 1871     3.38"  Sep 17, 1876
2.86"  Jul 22, 1927     2.59"  Aug 25, 1879     3.24"  Sep 12, 1878
2.80"  Jul  4, 1878     2.53"  Aug  9, 1953     3.00"  Sep 29, 1936
                                                      

    OCTOBER                  NOVEMBER                DECEMBER
3.56"  Oct 15, 1954     2.95"  Nov 30, 2010     2.76"  Dec 30, 1990
3.22"  Oct  2, 1929     1.89"  Nov 25, 2010     2.35"  Dec 17, 1890
1.96"  Oct 20, 1873     1.86"  Nov  7, 1998     2.05"  Dec 18, 1990
1.90"  Oct 25, 1872     1.85"  Nov 15, 1871     1.72"  Dec 29, 1942
1.83"  Oct 17, 1911     1.80"  Nov 16, 1985     1.69"  Dec 14, 1909
                        1.73"  Nov  4, 1936
                        1.72"  Nov  2. 1999
                        1.72"  Nov  9, 1913

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