Big Delta FAA/AMOS AP
| Normal | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| Mean Minimum | -7.8 | -3.1 | 3.8 | 22.2 | 37.7 | 48.0 | 51.2 | 45.9 | 35.4 | 17.5 | -0.4 | -4.4 |
| Mean | -1.0 | 4.9 | 14.1 | 32.2 | 47.6 | 57.6 | 60.2 | 54.8 | 43.9 | 24.1 | 6.2 | 2.1 |
| Mean Maximimum | 5.7 | 13.0 | 24.4 | 42.3 | 57.5 | 67.2 | 69.2 | 63.7 | 52.3 | 30.7 | 12.9 | 8.6 |
| Mean Precipitation | 0.31 | 0.28 | 0.18 | 0.23 | 0.90 | 2.31 | 2.68 | 1.89 | 1.03 | 0.80 | 0.63 | 0.38 |
| Snowfall | 5.8 | 6.4 | 3.1 | 2.8 | 1.1 | 0.0 | 0.0 | 0.0 | 2.2 | 13.0 | 13.1 | 6.7 |
| CDD | 0 | 0 | 0 | 0 | 0 | 9 | 12 | 5 | 0 | 0 | 0 | 0 |
| HDD | 2047 | 1681 | 1578 | 983 | 540 | 231 | 161 | 321 | 635 | 1268 | 1762 | 1950 |
| Temperature Extremes | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| Highest Daily Maximum (°F) | 54 | 51 | 58 | 72 | 90 | 92 | 91 | 90 | 79 | 74 | 52 | 55 |
| Year | 2009 | 1943 | 1981 | 1979 | 1947 | 1969 | 1958 | 1994 | 1963 | 2003 | 1979 | 1985 |
| Lowest Daily Minimum (°F) | -63 | -60 | -49 | -37 | -1 | 26 | 32 | 22 | -2 | -39 | -47 | -62 |
| Year | 1947 | 1947 | 1964 | 1944 | 1945 | 2006 | 1971 | 1948 | 1983 | 1975 | 1986 | 1946 |
| Highest Mean (°F) | 24.13 | 20.54 | 31.61 | 40.3 | 54.18 | 64.47 | 64.69 | 61.56 | 51.97 | 37.16 | 25.13 | 17.66 |
| Year | 1981 | 1997 | 1965 | 1993 | 1981 | 2004 | 2009 | 1977 | 1995 | 2013 | 2002 | 2005 |
| Lowest Mean (°F) | -25.16 | -19.64 | -3.84 | 17.05 | 37.24 | 48.87 | 55.32 | 48.34 | 29.91 | 13.08 | -9.63 | -22.45 |
| Year | 1971 | 1979 | 2007 | 2013 | 1964 | 1949 | 1959 | 1969 | 1992 | 1982 | 2006 | 1964 |
| Precipitation Extremes | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| Highest 1-Day Maximum Precipitation (in) | 0.73 | 0.59 | 0.53 | 0.94 | 1.16 | 2.14 | 2.27 | 1.34 | 1.44 | 0.98 | 0.9 | 0.41 |
| Year | 1957 | 1996 | 1995 | 1963 | 1962 | 1943 | 2008 | 1995 | 1990 | 2010 | 1919 | 1964 |
| Highest Total Precipitation (in) | 1.35 | 2.48 | 1.14 | 1.98 | 3.07 | 5.42 | 6.75 | 4.81 | 3.01 | 2.07 | 2.82 | 1.67 |
| Year | 1957 | 1996 | 1995 | 1948 | 1988 | 1985 | 2008 | 2000 | 1952 | 1989 | 1994 | 1955 |
| Lowest Total Precipitation (in) | 0.01 | 0 | 0 | 0.01 | 0.02 | 0.31 | 0.56 | 0.53 | 0.12 | 0.03 | 0 | 0 |
| Year | 1945 | 1941 | 1937 | 1947 | 1944 | 2003 | 1994 | 2001 | 2012 | 1962 | 2011 | 2011 |
| Snow Extremes | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
| Highest 1-Day Maximum Snow (in) | 8.5 | 9.1 | 6.4 | 10 | 9.3 | 6 | 0 | 0 | 8.5 | 10.4 | 9.5 | 10 |
| Year | 1957 | 1996 | 1950 | 1982 | 1989 | 1917 | 1941 | 1940 | 1992 | 1981 | 1994 | 1965 |
| Highest Total Snow (in) | 20.9 | 32 | 24.9 | 19 | 10.9 | 19 | 0 | 0 | 14 | 23 | 41.8 | 29 |
| Year | 1950 | 1996 | 1967 | 1948 | 1989 | 1917 | 1941 | 1940 | 1981 | 1997 | 1994 | 1955 |
| Lowest Total Snow (in) | 0.1 | 0 | 0 | 0.1 | 0 | 0 | 0 | 0 | 0 | 0.3 | 0.3 | 0.7 |
| Year | 1959 | 1941 | 1937 | 1958 | 1941 | 1937 | 1941 | 1940 | 1963 | 1962 | 1953 | 1975 |