Ketchikan weather by month
What a typical year looks like in Ketchikan, Alaska: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Ketchikan 10n, 14 km from Ketchikan; records cover 2007–2026.
The year at a glance
- Precipitation a year
- 104.7 in2660 mm
- Snow a year
- Rare
- Last spring freeze
- Apr 23
- First fall freeze
- Oct 28
- Heating degree days
- 7,074
- Cooling degree days
- 11
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 17°−8° (heating, 99%) and 79°26° (cooling, 1%).
Month by month
Ketchikan in January
Highs average 38°3° and lows 31°−1°, with 11.7 in296 mm of precipitation in a typical January.
- Record high
- 55°13° (2018)
- Record low
- −2°−19° (2012)
- Heating degree days
- 944
- Cooling degree days
- 0
Ketchikan in February
Highs average 41°5° and lows 32°0°, with 7.8 in198 mm of precipitation in a typical February.
- Record high
- 55°13° (2024)
- Record low
- 6°−14° (2021)
- Heating degree days
- 806
- Cooling degree days
- 0
Ketchikan in March
Highs average 44°7° and lows 32°0°, with 7.5 in190 mm of precipitation in a typical March.
- Record high
- 66°19° (2019)
- Record low
- 8°−13° (2011)
- Heating degree days
- 835
- Cooling degree days
- 0
Ketchikan in April
Highs average 50°10° and lows 36°2°, with 7.3 in186 mm of precipitation in a typical April.
- Record high
- 73°23° (2021)
- Record low
- 25°−4° (2020)
- Heating degree days
- 656
- Cooling degree days
- 0
Ketchikan in May
Highs average 58°14° and lows 42°6°, with 5.5 in140 mm of precipitation in a typical May.
- Record high
- 80°27° (2020)
- Record low
- 32°0° (2008)
- Heating degree days
- 470
- Cooling degree days
- 0
Ketchikan in June
Highs average 63°17° and lows 48°9°, with 4.7 in120 mm of precipitation in a typical June.
- Record high
- 87°31° (2021)
- Record low
- 37°3° (2012)
- Heating degree days
- 296
- Cooling degree days
- 2
Ketchikan in July
Highs average 65°19° and lows 52°11°, with 5.2 in132 mm of precipitation in a typical July.
- Record high
- 85°29° (2015)
- Record low
- 43°6° (2008)
- Heating degree days
- 206
- Cooling degree days
- 6
Ketchikan in August
Highs average 65°18° and lows 53°11°, with 8 in203 mm of precipitation in a typical August.
- Record high
- 84°29° (2010)
- Record low
- 42°6° (2008)
- Heating degree days
- 194
- Cooling degree days
- 3
Ketchikan in September
Highs average 59°15° and lows 48°9°, with 10.2 in259 mm of precipitation in a typical September.
- Record high
- 81°27° (2017)
- Record low
- 35°2° (2020)
- Heating degree days
- 351
- Cooling degree days
- 0
Ketchikan in OctoberThis month
Highs average 51°11° and lows 41°5°, with 12.9 in328 mm of precipitation in a typical October.
- Record high
- 67°19° (2022)
- Record low
- 22°−6° (2012)
- Heating degree days
- 594
- Cooling degree days
- 0
Ketchikan in November
Highs average 43°6° and lows 35°2°, with 13.1 in333 mm of precipitation in a typical November.
- Record high
- 59°15° (2010)
- Record low
- 16°−9° (2013)
- Heating degree days
- 786
- Cooling degree days
- 0
Ketchikan in December
Highs average 38°3° and lows 32°0°, with 10.8 in274 mm of precipitation in a typical December.
- Record high
- 57°14° (2017)
- Record low
- 4°−16° (2022)
- Heating degree days
- 936
- Cooling degree days
- 0