Table 5.2-1. Average (or normal) and maximum daily air temperature ranges summarized by month for CFA(a). Mean Maximum (deg F.) (deg F.) January 23 52 February 24 50 March 25 53 April 29 57 May 30 55 June 33 55 July 38 57 August 38 59 September 37 59 October 34 59 November 25 52 December 23 54 ANNUAL 30 59 a. Data period of record spans January 1950 through December 2005.