Sea Level Pressure Averages and Records
1928-present

Month	Average	Highest	Day	Year	Lowest	Day	Year
January	30.21	31.01	1	1979	28.94	21	2010
February	30.12	30.95	10	2002	29.08	6	1937
March	29.98	30.78	11	1951	29.07	2	1989
April	29.93	30.58	6	1939	29.00	15	2002
May	29.86	30.50	15	1970	29.11	29	1988
June	29.84	30.39	15	1981	29.17	22	1944
July	29.87	30.36	12	1989	29.24	2	1999
August	29.88	30.33	31	1987	29.39	31	1944
September	29.94	30.52	25	1970	29.33	19	2004+
October	30.05	30.67	31	1981	29.23	29	1935
November	30.10	30.89	23	1938	29.02	30	1982
December	30.22	31.09	8,9	1956	29.01	1	1982
Annual	30.00	31.09	Dec 8,9	1956	28.94	Jan 21	2010