Boston October Weather History     Oct 1 Warmest low temperature, 69F, 1954 Oct 2 Earliest recorded snow, trace, 1899 Oct 7 Highest temperature, 90F, 1963 Oct 9 Beginning of 44 days without measurable precipitation, 1924 Oct 10 Earliest measurable snowfall, 0.2 inches, 1979 Oct 11 Highest pressure, 30.78 inches, 1972 Oct 12 Highest temperature, 90F, 1954 Oct 20 Stile's hurricane, 1770 Oct 20-21 Greatest 24 hour precipitation, 6.66 inches, 1996 Oct 23 Coldest high temperature, 38F, 1969 Oct 23-24 Winthrop's hurricane, 1761 Oct 25 Highest average one minute wind velocity, northwest 63 mph, 1933 Oct 26 Lowest temperature, 25F, 1879 Oct 27 Lowest temperature, 25F, 1936 Oct 28-31 Halloween storm.  A noreaster that brought record breaking damage to the coast, 1991

Climate info from NWS Forecast Office, Boston