Boston April 21 Weather Records

Daily averages and all-time records for weather in Boston, Massachusetts for the date of April 21.
April 21 All-Time Records
1893–2024
Highest temperature 88 °F 1957
Lowest temperature 27 °F 1908
Lowest daily high 38 °F 1947
Highest daily low 65 °F 1923
Most precipitation 3.32 inches 1991
Most snow 0.2 inches 1947
April 21 Average Weather
1991–2020 1
Average high 58.9 °F
Average low 42.9 °F
Chance precipitation 38.7%
Chance snow 1.3%
Boston April 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2024 52 41 0.00 0.0
2023 51 45 0.00 0.0
2022 62 41 0.00 0.0
2021 72 38 0.24 0.0
2020 54 34 0.33 0.0
2019 70 55 0.03 0.0
2018 59 39 0.00 0.0
2017 45 44 0.51 0.0
2016 77 43 0.00 0.0
2015 65 46 0.54 0.0
2014 69 36 0.00 0.0
2013 50 37 0.00 0.0
2012 78 54 0.01 0.0
2011 56 41 0.00 0.0
2010 69 47 0.00 0.0
2009 58 43 1.13 0.0
2008 52 44 0.00 0.0
2007 75 44 0.00 0.0
2006 49 43 0.00 0.0
2005 54 41 0.07 0.0
2004 61 43 0.00 0.0
2003 54 40 0.08 0.0
2002 56 43 0.00 0.0
2001 67 47 0.00 0.0
2000 47 42 1.02 0.0
1999 61 42 0.00 0.0
1998 65 41 0.00 0.0
1997 52 42 0.00 0.0
1996 79 56 0.00 0.0
1995 49 43 0.14 0.0
1994 55 41 0.00 0.0
1993 70 53 0.00 0.0
1992 75 54 0.00 0.0
1991 51 41 3.32 0.0
1990 56 47 0.48 0.0
1989 53 41 0.00 0.0
1988 57 38 0.00 0.0
1987 57 44 0.03 0.0
1986 65 46 0.15 0.0
1985 60 48 0.00 0.0
1984 54 34 0.00 0.0
1983 50 39 0.00 0.0
1982 61 40 0.01 0.0
1981 47 32 0.00 0.0
1980 71 43 0.00 0.0
1979 54 39 0.00 0.0
1978 56 48 0.00 0.0
1977 82 53 0.00 0.0
1976 68 49 0.00 0.0
1975 52 37 0.00 0.0
1974 77 41 0.00 0.0
1973 66 41 0.00 0.0
1972 54 38 0.00 0.0
1971 65 44 0.00 0.0
1970 45 41 0.16 0.0
1969 54 36 0.00 0.0
1968 49 45 0.13 0.0
1967 55 40 0.00 0.0
1966 63 44 0.02 0.0
1965 49 33 0.00 0.0
1964 46 38 0.00 0.0
1963 72 48 0.00 0.0
1962 60 38 0.00 0.0
1961 71 41 0.00 0.0
1960 70 45 0.00 0.0
1959 59 39 0.00 0.0
1958 78 52 0.00 0.0
1957 88 57 0.00 0.0
1956 53 34 0.00 0.0
1955 53 47 0.00 0.0
1954 85 52 0.00 0.0
1953 53 37 0.00 0.0
1952 68 47 0.00 0.0
1951 59 39 0.00 0.0
1950 55 45 0.39 0.0
1949 77 48 0.00 0.0
1948 68 41 0.09 0.0
1947 38 32 0.42 0.2
1946 61 39 0.00 0.0
1945 63 43 0.09 0.0
1944 44 39 0.02 0.0
1943 41 37 0.08 0.0
1942 49 40 0.14 0.0
1941 73 54 0.00 0.0
1940 39 34 0.84 0.0
1939 59 46 0.00 0.0
1938 61 48 0.00 0.0
1937 52 38 0.15 0.0
1936 70 43 0.30 0.0
1935 65 47 0.00 0.0
1934 56 42 0.00 0.0
1933 63 37 0.00 0.0
1932 68 48 0.00 0.0
1931 76 51 0.00 0.0
1930 49 37 0.00 0.0
1929 44 38 1.12 0.0
1928 49 34 0.06 0.0
1927 69 46 0.00 0.0
1926 69 37 0.00 0.0
1925 57 31 0.00 0.0
1924 60 40 0.00 0.0
1923 87 65 0.00 0.0
1922 50 30 0.00 0.0
1921 76 55 0.00 0.0
1920 54 41 1.18 0.0
1919 58 44 0.01 0.0
1918 44 37 1.50 0.0
1917 59 42 0.18 0.0
1916 53 44 0.06 0.0
1915 57 44 0.00 0.0
1914 53 41 0.00 0.0
1913 55 35 0.00 0.0
1912 72 42 0.00 0.0
1911 45 34 0.00 0.0
1910 55 46 0.00 0.0
1909 44 41 0.12 0.0
1908 44 27 0.00 0.0
1907 50 30 0.00 0.0
1906 57 47 0.02 0.0
1905 72 44 0.51 0.0
1904 53 34 0.00 0.0
1903 55 38 0.00 0.0
1902 65 48 0.01 0.0
1901 45 41 0.24 0.0
1900 74 49 0.00 0.0
1899 50 40 0.00 0.0
1898 55 40 0.00 0.0
1897 57 29 0.00 0.0
1896 64 40 0.08 0.0
1895 60 37 0.00 0.0
1894 66 54 0.03 0.0
1893 54 35 0.70 0.0
What's the all-time high for Boston on 4/21?
For the date of Apr 21, the highest temperature ever reached in Boston history is 88 °F which happened in 1957.
Highest Temperatures in Boston on April 21
Rank Temperature Year
1 88 °F 1957
2 87 °F 1923
3 85 °F 1954
4 82 °F 1977
5 79 °F 1996
6 78 °F 2012
6 78 °F 1958
8 77 °F 2016
8 77 °F 1949
8 77 °F 1974
What's the all-time low for Boston on 4/21?
For the date of Apr 21, the lowest temperature ever reached in Boston history is 27 °F which happened in 1908.
Lowest Temperatures in Boston on April 21
Rank Temperature Year
1 27 °F 1908
2 29 °F 1897
3 30 °F 1907
3 30 °F 1922
5 31 °F 1925
6 32 °F 1947
6 32 °F 1981
8 33 °F 1965
9 34 °F 2020
9 34 °F 1911
9 34 °F 1984
9 34 °F 1956
9 34 °F 1904
9 34 °F 1928
9 34 °F 1940
Lowest High Temperatures in Boston on April 21
Rank Temperature Year
1 38 °F 1947
2 39 °F 1940
3 41 °F 1943
4 44 °F 1908
4 44 °F 1944
4 44 °F 1909
4 44 °F 1929
4 44 °F 1918
9 45 °F 1970
9 45 °F 1901
9 45 °F 1911
9 45 °F 2017
What's the most it has ever rained in Boston on 4/21?
For the date of Apr 21, the most precipitation ever recorded in Boston history is 3.32 inches which happened in 1991.
All-Time Most Precipitation in Boston on April 21
Rank Precipitation Year
1 3.32 inches 1991
2 1.50 inches 1918
3 1.18 inches 1920
4 1.13 inches 2009
5 1.12 inches 1929
6 1.02 inches 2000
7 0.84 inches 1940
8 0.70 inches 1893
9 0.54 inches 2015
10 0.51 inches 1905
10 0.51 inches 2017
All-Time Most Snow in Boston on April 21
Rank Precipitation Year
1 0.2 inches 1947
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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