Alaska · county records since 1925, through September 2026.
Weather › Alaska › Ketchikan Gateway Borough
Ketchikan Gateway Borough has warmed the least of Alaska's 30 counties since 1970 (0.3° per decade). September 2026 averaged 50.2° there, right at the usual for September (24th warmest of 102).
That is the 1991 to 2020 average for these dates in Ketchikan Gateway Borough. The Weather Service forecast fills in below.
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Each bar is a month's average temperature against the usual for that month (1991 to 2020). Ranks compare the same month in every year since 1925.
Rain and melted snow against the usual for each month. The drought reading is NOAA's Palmer index for the county.
| Month | Usual high / low | Usual rain | Warmest | Coldest |
|---|---|---|---|---|
| January | 34° / 24° | 17.4 in | 36.4° 1981 | 11.9° 1969 |
| February | 35° / 24° | 11.7 in | 36.2° 1977 | 12.5° 1936 |
| March | 38° / 27° | 11.9 in | 38.4° 2016 | 26.0° 1951 |
| April | 45° / 33° | 10.4 in | 42.9° 2016 | 32.2° 1954 |
| May | 54° / 40° | 8.6 in | 51.8° 2015 | 41.2° 1955 |
| June | 58° / 46° | 6.8 in | 56.5° 1958 | 46.7° 2008 |
| July | 60° / 49° | 8.1 in | 57.9° 2018 | 49.8° 1933 |
| August | 60° / 49° | 12.6 in | 58.7° 1977 | 50.0° 1955 |
| September | 55° / 45° | 18.0 in | 53.0° 1995 | 45.2° 1992 |
| October | 46° / 36° | 20.3 in | 45.0° 1986 | 36.8° 1933 |
| November | 37° / 29° | 17.7 in | 38.1° 1954 | 20.8° 1985 |
| December | 34° / 25° | 18.3 in | 36.0° 1930 | 15.3° 1933 |
Warmest and coldest are the month's whole-month average temperature, with the year it happened.