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PITTSBURGH WEATHER RECORDS

What's the most it's ever snowed in a single day in Pittsburgh's history? What's the rainiest month? What's the all-time high temperature? Your snow, rain and temperature related questions are answered below.

All information courtesy of the National Weather Service Pittsburgh.

SNOW RECORDS

LARGEST SNOW STORMS ON RECORD
27.4" November 24-26, 1950
25.9" December 16-18, 1890
25.3" March 12-14, 1993
21.9" February 5-6, 2010

LARGEST ONE DAY SNOWFALL ON RECORD
23.6" March 13, 1993
22.0" December 17, 1890
16.5" January 8, 1884

EARLIEST RECORDED SNOWFALL
-September 23, 1989...Trace

LATEST RECORDED SNOWFALL
-May 27, 1961...Trace

LARGEST DAILY SNOWFALL FOR EACH MONTH
-October 31, 1993, 6.6"
-November 24, 1950, 14.0"
-December 17, 1890, 22.0"
-January 8, 1884, 16.5"
-February 5, 2010, 11.4"
-March 13, 1993 23.6"
-April 3, 1901 12.7"
-May 9, 1966 3.1"

LARGEST MONTHLY SNOWFALL ON RECORD
-October 1993, 8.5"
-November 1950, 32.3"
-December 1890, 36.3"
-January 1978, 40.2"
-February 2010, 48.7"
-March 1993, 34.1"
-April 1901, 13.5"
-May 1966, 3.1"

LARGEST SNOWFALL SEASONS ON RECORD
-1950-51 82.0"
-1913-14 78.5"
-2009-10 77.4"
-1993-94 76.8"
-1960-61 76.0"

30 YEAR SNOWFALL AVERAGES
-October .40"
-November 2.1"
-December 8.3"
-January 11.5"
-February 10.3"
-March 7.4"
-April 1.5"

Season Average 41.4"

FREQUENCY OF HEAVY SNOWFALL IN PITTSBURGH
-5" or more...Twice Every Season
-8 to 12"...Once every 2 years
-13 to 15"...Once every 5 years
-16" or more...Once every 15 years

WHITE CHRISTMAS ODDS
-An official "White Christmas" is defined as 1" or more of new snow on December 25th

-Odds of 1" or more of new snow on December 25th is 17%
-Odds of a trace/flurries of snow being observed on December 25th is 38%

FROST INFORMATION
-Average date of last killing frost in spring...April 21st
-Average date of first killing frost in autumn...October 20th

-Average Length of growing season...182 days

PRECIPITATION RECORDS

30 YEAR AVERAGE TOTAL PRECIPITATION
-January 2.70"
-February 2.39"
-March 2.95"
-April 3.11"
-May 3.95"
-June 4.30"
-July 3.83"
-August 3.48"
-September 3.11"
-October 2.29"
-November 3.23"
-December 2.85"

Total Precipitation Annual Average 38.19"

DRIEST MONTHS ON RECORD
-October 1874 .06"
-February 1841 .07"
-October 1924 .12"
-October 1963 .16"
-November 1904 .22"

WETTEST MONTHS ON RECORD
-November 1985 11.05"
-June 1989 10.29"
-June 1951 10.25"
-September 1945 10.08"
-September 2004 10.06"

DRIEST YEARS ON RECORD
-1930 22.65"
-1839 25.32"
-1900 25.73"
-1932 25.89"
-1856 25.59"

WETTEST YEARS ON RECORD
-2018 57.83"
-2004 57.41"
-1990 52.34"
-1890 50,61"
-1865 50.50"

GREATEST DAILY RAINFALL
-September 14, 2004 5.95" (remnants of Ivan)
-September 9, 2018 3.73" (remnants of Gordon)
-September 8, 2004 3.60" (remnants of Frances)

TEMPERATURE RECORDS

HOTTEST TEMPERATURES ON RECORD
-103 July 6, 1988...August 6, 1918...July 10, 1881

WARMEST YEARS ON RECORD (mean temps)
-1921 55.4 degrees
-1900 54.7 degrees
-1931 54.7 degrees
-1898 54.6 degrees
-1881 54.5 degrees

LONGEST HEAT WAVE ON RECORD
- 13 days...July 4-16, 1988

NUMBER OF DAYS 90 OR HIGHER IN A YEAR
-Average is 9.5

TEMPERATURES AT/ABOVE 100
-In July, once every 5 years
-In August, once every 10 years

COLDEST TEMPERATURES ON RECORD
-22, January 19, 1994
-20, February 10, 1899
-18, January 20, 1985, January 21, 1985

COLDEST YEARS ON RECORD (mean temp)
-1976 48 degrees
-1963 48.2 degrees
-1958 48.8 degrees
-1960 49.1 degrees
-1968 49.1 degrees

LONGEST PERIOD WITH TEMP 32 OR LOWER
-33 days...December 26, 1976 to January 27, 1977

NUMBER OF DAYS WITH MINIMUM TEMP BELOW ZERO
-5 times a year

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