Table 39. Monthly and annual averages and extremes of hourly wet bulb temperatures for CFA(a).

                       Monthly Values
                          Highest   Lowest       Five-Minute Extreme Values
                Average   Average   Average         Maximum      Minimum
               (deg F.)  (deg F.)  (deg F.)        (deg F.)     (deg F.)

January           15.3      23.7       6.2            47.9        -30.6
February          18.3      28.1       7.0            48.2        -31.3
March             28.9      32.6      18.9            50.9        -17.7
April             35.4      39.1      30.0            56.0          4.8
May               42.7      47.2      38.1            66.0          8.8
June              48.4      51.5      45.5            66.2         19.8
July              52.9      55.7      49.8            67.4         24.2
August            51.0      55.6      48.0            65.6         21.3
September         44.6      50.9      40.3            65.6         11.3
October           35.9      42.4      21.9            57.2         -9.1
November          26.0      31.1      18.8            52.1        -23.5
December          17.2      23.4       8.9            46.8        -30.6

ANNUAL            35.0      38.1      32.0            67.4        -31.3

a. Data period of record spans January 1994 through December 2023.