National Weather Service United States Department of Commerce

 

Reduced to Sea Level

 

Monthly Records

MONTH HIGHEST
PRESSURE
DATE LOWEST
PRESSURE
DATE
January 30.99 in.

January 7, 1968,
January ??, 1888

28.95 in. January 10, 1975
February 30.98 in. February 21, 1918 28.71 in. February 28, 1902
March 30.78 in. March 1, 1962 28.82 in. March 11, 1923
April 30.73 in. April 15, 1981 28.87 in. April 20, 1893
May 30.55 in. May 4, 1966 29.08 in. May 27, 1973
June 30.53 in. June 10, 1913 29.31 in. June 6, 1916
July 30.39 in. July ??, 1892 29.48 in. July 9, 1926
August 30.42 in. August 11, 1967 29.54 in. August 20, 1915
September 30.58 in. September 30, 1947 29.26 in. September 25, 1941
October 30.65 in. October 31, 1913 29.03 in. October 26, 2010
November 30.91 in. November 13, 1986 29.07 in. November 13, 1951
December 30.99 in. December 20, 1924 29.00 in. December 11, 1987

 

  • HIGHEST PRESSURE:  30.99 inches on January ?? 1888, December 20 1924, and January 7 1968.
  • LOWEST PRESSURE:  28.71 inches on February 28 1902.

 

Records began in July 1879.