Boston October 21 Weather Records

Daily averages and all-time records for weather in Boston, Massachusetts for the date of October 21.
October 21 All-Time Records
1893–2024
Highest temperature 82 °F 1920
Lowest temperature 30 °F 1974
Lowest daily high 42 °F 1974
Highest daily low 59 °F 2016
Most precipitation 1.78 inches 1996
Most snow none -
October 21 Average Weather
1991–2020 1
Average high 60.8 °F
Average low 46.2 °F
Chance precipitation 34.0%
Chance snow 0.6%
Boston October 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 60 56 0.56 0.0
2022 62 46 0.00 0.0
2021 75 58 0.00 0.0
2020 65 56 0.06 0.0
2019 63 51 0.00 0.0
2018 53 37 0.03 0.0
2017 78 51 0.00 0.0
2016 75 59 1.11 0.0
2015 61 53 0.07 0.0
2014 62 49 0.00 0.0
2013 68 45 0.00 0.0
2012 64 49 0.00 0.0
2011 64 53 0.00 0.0
2010 60 45 0.02 0.0
2009 68 52 0.00 0.0
2008 59 44 0.01 0.0
2007 75 55 0.00 0.0
2006 56 42 0.00 0.0
2005 58 44 0.00 0.0
2004 51 43 0.00 0.0
2003 70 46 0.02 0.0
2002 54 38 0.00 0.0
2001 74 47 0.00 0.0
2000 74 50 0.00 0.0
1999 57 45 0.00 0.0
1998 57 45 0.00 0.0
1997 58 44 0.00 0.0
1996 57 49 1.78 0.0
1995 68 58 1.40 0.0
1994 66 56 0.01 0.0
1993 70 48 0.51 0.0
1992 50 45 0.10 0.0
1991 54 36 0.00 0.0
1990 63 40 0.00 0.0
1989 57 42 0.02 0.0
1988 52 35 0.00 0.0
1987 67 47 0.05 0.0
1986 68 45 0.00 0.0
1985 54 39 0.00 0.0
1984 70 49 0.00 0.0
1983 47 35 0.00 0.0
1982 68 45 0.00 0.0
1981 72 48 0.00 0.0
1980 57 41 0.01 0.0
1979 80 57 0.00 0.0
1978 70 41 0.00 0.0
1977 68 50 0.00 0.0
1976 67 47 0.31 0.0
1975 69 48 0.00 0.0
1974 42 30 0.00 0.0
1973 58 44 0.00 0.0
1972 49 33 0.00 0.0
1971 67 49 0.00 0.0
1970 57 41 0.00 0.0
1969 63 51 0.17 0.0
1968 60 51 0.00 0.0
1967 61 42 0.00 0.0
1966 61 42 0.00 0.0
1965 72 53 0.00 0.0
1964 52 37 0.69 0.0
1963 69 52 0.00 0.0
1962 59 50 0.01 0.0
1961 57 48 0.00 0.0
1960 50 37 0.00 0.0
1959 47 34 0.00 0.0
1958 53 38 0.00 0.0
1957 52 37 0.00 0.0
1956 63 47 0.00 0.0
1955 68 45 0.02 0.0
1954 62 48 0.00 0.0
1953 57 49 0.00 0.0
1952 52 31 0.00 0.0
1951 60 39 0.00 0.0
1950 64 42 0.00 0.0
1949 67 46 0.00 0.0
1948 48 38 0.00 0.0
1947 72 56 0.00 0.0
1946 55 42 0.00 0.0
1945 74 47 0.00 0.0
1944 50 42 1.78 0.0
1943 59 49 0.00 0.0
1942 65 44 0.69 0.0
1941 70 47 0.00 0.0
1940 43 32 0.00 0.0
1939 67 47 0.00 0.0
1938 60 49 0.04 0.0
1937 64 46 0.00 0.0
1936 79 58 0.00 0.0
1935 58 46 0.00 0.0
1934 52 39 0.09 0.0
1933 52 40 0.00 0.0
1932 59 50 0.00 0.0
1931 64 51 0.00 0.0
1930 53 34 0.00 0.0
1929 77 52 0.00 0.0
1928 64 48 0.00 0.0
1927 63 46 0.00 0.0
1926 49 37 0.06 0.0
1925 52 38 0.00 0.0
1924 52 36 0.00 0.0
1923 58 50 0.00 0.0
1922 54 32 0.00 0.0
1921 56 43 0.00 0.0
1920 82 57 0.00 0.0
1919 55 37 0.08 0.0
1918 61 44 0.06 0.0
1917 49 38 0.00 0.0
1916 73 52 0.03 0.0
1915 78 57 0.00 0.0
1914 78 52 0.00 0.0
1913 59 45 0.00 0.0
1912 56 44 0.00 0.0
1911 56 51 0.40 0.0
1910 55 43 0.00 0.0
1909 58 37 0.17 0.0
1908 53 38 0.00 0.0
1907 42 32 0.00 0.0
1906 59 50 0.06 0.0
1905 52 39 0.00 0.0
1904 68 52 0.63 0.0
1903 58 44 0.00 0.0
1902 49 38 0.00 0.0
1901 58 39 0.00 0.0
1900 68 43 0.00 0.0
1899 46 34 0.00 0.0
1898 53 49 0.03 0.0
1897 51 43 0.11 0.0
1896 63 45 0.03 0.0
1895 48 34 0.00 0.0
1894 56 48 0.00 0.0
1893 73 51 0.00 0.0
What's the all-time high for Boston on 10/21?
For the date of Oct 21, the highest temperature ever reached in Boston history is 82 °F which happened in 1920.
Highest Temperatures in Boston on October 21
Rank Temperature Year
1 82 °F 1920
2 80 °F 1979
3 79 °F 1936
4 78 °F 2017
4 78 °F 1914
4 78 °F 1915
7 77 °F 1929
8 75 °F 2007
8 75 °F 2016
8 75 °F 2021
What's the all-time low for Boston on 10/21?
For the date of Oct 21, the lowest temperature ever reached in Boston history is 30 °F which happened in 1974.
Lowest Temperatures in Boston on October 21
Rank Temperature Year
1 30 °F 1974
2 31 °F 1952
3 32 °F 1922
3 32 °F 1940
3 32 °F 1907
6 33 °F 1972
7 34 °F 1930
7 34 °F 1895
7 34 °F 1959
7 34 °F 1899
Lowest High Temperatures in Boston on October 21
Rank Temperature Year
1 42 °F 1974
1 42 °F 1907
3 43 °F 1940
4 46 °F 1899
5 47 °F 1983
5 47 °F 1959
7 48 °F 1948
7 48 °F 1895
9 49 °F 1902
9 49 °F 1917
9 49 °F 1926
9 49 °F 1972
What's the most it has ever rained in Boston on 10/21?
For the date of Oct 21, the most precipitation ever recorded in Boston history is 1.78 inches which has happened 2 times, most recently in 1996.
All-Time Most Precipitation in Boston on October 21
Rank Precipitation Year
1 1.78 inches 1996
1 1.78 inches 1944
3 1.40 inches 1995
4 1.11 inches 2016
5 0.69 inches 1942
5 0.69 inches 1964
7 0.63 inches 1904
8 0.56 inches 2023
9 0.51 inches 1993
10 0.40 inches 1911
Weather Station Details
Years Station Coordinates
1936–2024 Boston Logan International Airport location
1893–1935 Boston City location
Notes
1: Daily averages are a moving average which includes 14 days before and after the date.
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