Boise December 18 Weather Records

Daily averages and all-time records for weather in Boise, Idaho for the date of December 18.
December 18 All-Time Records
1940–2022
Highest temperature 55 °F 1979
Lowest temperature -3 °F 1985
Lowest daily high 17 °F 1985
Highest daily low 38 °F 2018
Most precipitation 0.5 inches 1941
Most snow 3.5 inches 1951
December 18 Average Weather
1991–2020 1
Average high 38.3 °F
Average low 24.8 °F
Chance precipitation 38.9%
Chance snow 17.8%
Boise December 18 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2021 35 25 0.00 0.0
2020 43 32 0.00 0.0
2019 35 22 0.00 0.0
2018 45 38 0.15 0.0
2017 45 29 0.00 0.0
2016 17 0 0.00 0.0
2015 43 35 0.04 0.0
2014 47 34 0.00 0.0
2013 26 21 0.00 0.0
2012 35 20 0.00 0.0
2011 38 19 0.00 0.0
2010 41 29 0.09 0.8
2009 45 32 0.01 0.0
2008 34 17 0.00 0.0
2007 42 36 0.18 0.0
2006 32 16 0.00 0.0
2005 27 8 0.02 0.5
2004 34 28 0.00 0.0
2003 42 29 0.00 0.0
2002 41 25 0.00 0.0
2001 40 27 0.01 0.0
2000 37 20 0.00 0.0
1999 49 33 0.01 0.0
1998 34 20 0.00 0.0
1997 39 26 0.00 0.0
1996 28 14 0.00 0.0
1995 36 25 0.00 0.0
1994 45 34 0.07 0.0
1993 41 21 0.00 0.0
1992 26 5 0.07 0.9
1991 53 28 0.05 0.0
1990 44 24 0.09 1.6
1989 35 15 0.00 0.0
1988 38 16 0.00 0.0
1987 34 18 0.00 0.0
1986 24 19 0.04 0.4
1985 17 -3 0.00 0.0
1984 19 -1 0.00 0.0
1983 30 24 0.10 1.0
1982 45 30 0.00 0.0
1981 41 31 0.26 0.0
1980 30 22 0.00 0.0
1979 55 25 0.00 0.0
1978 35 22 0.06 1.0
1977 39 30 0.01 0.1
1976 39 13 0.00 0.0
1975 24 9 0.00 0.0
1974 37 25 0.00 0.0
1973 47 33 0.00 0.0
1972 48 34 0.11 0.0
1971 32 14 0.00 0.0
1970 32 25 0.00 0.0
1969 46 32 0.00 0.0
1968 35 27 0.22 2.3
1967 34 19 0.08 0.7
1966 31 23 0.01 0.1
1965 29 14 0.00 0.0
1964 23 8 0.00 0.0
1963 36 23 0.00 0.0
1962 45 38 0.00 0.0
1961 37 25 0.00 0.0
1960 51 32 0.16 0.0
1959 42 22 0.00 0.0
1958 41 28 0.00 0.0
1957 46 33 0.06 0.0
1956 46 30 0.00 0.0
1955 49 31 0.03 0.0
1954 32 12 0.00 0.0
1953 37 29 0.02 0.0
1952 36 31 0.00 0.0
1951 43 25 0.31 3.5
1950 39 28 0.00 0.0
1949 40 20 0.20 3.2
1948 30 10 0.00 0.0
1947 45 31 0.00 0.0
1946 32 16 0.00 0.0
1945 24 0 0.00 0.0
1944 27 11 0.00 0.0
1943 37 21 0.00 0.0
1942 31 27 0.00 0.0
1941 46 36 0.46 0.0
1940 44 37 0.04 0.0
All-Time Highest Temperatures in Boise on December 18
Rank Temperature Year
1 55 °F 1979
2 53 °F 1991
3 51 °F 1960
4 49 °F 1955
4 49 °F 1999
6 48 °F 1972
7 47 °F 1973
7 47 °F 2014
9 46 °F 1957
9 46 °F 1956
9 46 °F 1969
9 46 °F 1941
All-Time Lowest Temperatures in Boise on December 18
Rank Temperature Year
1 -3 °F 1985
2 -1 °F 1984
3 0 °F 1945
4 0 °F 2016
5 5 °F 1992
6 8 °F 1964
6 8 °F 2005
8 9 °F 1975
9 10 °F 1948
10 11 °F 1944
Lowest High Temperatures in Boise on December 18
Rank Temperature Year
1 17 °F 1985
2 17 °F 2016
3 19 °F 1984
4 23 °F 1964
5 24 °F 1945
5 24 °F 1975
5 24 °F 1986
8 26 °F 1992
9 26 °F 2013
10 27 °F 2005
10 27 °F 1944
All-Time Most Precipitation in Boise on December 18
Rank Precipitation Year
1 0.5 inches 1941
2 0.3 inches 1951
3 0.3 inches 1981
4 0.2 inches 1968
5 0.2 inches 1949
6 0.2 inches 2007
7 0.2 inches 1960
8 0.1 inches 2018
9 0.1 inches 1972
10 0.1 inches 1983
All-Time Most Snow in Boise on December 18
Rank Precipitation Year
1 3.5 inches 1951
2 3.2 inches 1949
3 2.3 inches 1968
4 1.6 inches 1990
5 1.0 inches 1983
5 1.0 inches 1978
7 0.9 inches 1992
8 0.8 inches 2010
9 0.7 inches 1967
10 0.5 inches 2005
Weather Station Details
Years Station Coordinates
1940–2022 location