Kasaan weather by month
What a typical year looks like in Kasaan, Alaska: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Thorne Bay, 16 km from Kasaan; records cover 2007–2026.
The year at a glance
- Precipitation a year
- 85.2 in2164 mm
- Snow a year
- Rare
- Last spring freeze
- May 4
- First fall freeze
- Oct 3
- Heating degree days
- 7,564
- 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 12°−11° (heating, 99%) and 81°27° (cooling, 1%).
Month by month
Kasaan in January
Highs average 38°3° and lows 28°−2°, with 8.2 in207 mm of precipitation in a typical January.
- Record high
- 59°15° (2018)
- Record low
- 2°−17° (2008)
- Heating degree days
- 987
- Cooling degree days
- 0
Kasaan in February
Highs average 40°4° and lows 28°−2°, with 5.5 in139 mm of precipitation in a typical February.
- Record high
- 54°12° (2024)
- Record low
- 7°−14° (2008)
- Heating degree days
- 869
- Cooling degree days
- 0
Kasaan in March
Highs average 43°6° and lows 30°−1°, with 6.3 in159 mm of precipitation in a typical March.
- Record high
- 66°19° (2019)
- Record low
- 8°−13° (2014)
- Heating degree days
- 893
- Cooling degree days
- 0
Kasaan in April
Highs average 50°10° and lows 34°1°, with 5.1 in129 mm of precipitation in a typical April.
- Record high
- 73°23° (2021)
- Record low
- 17°−8° (2008)
- Heating degree days
- 693
- Cooling degree days
- 0
Kasaan in May
Highs average 57°14° and lows 40°4°, with 3.5 in89 mm of precipitation in a typical May.
- Record high
- 84°29° (2023)
- Record low
- 25°−4° (2010)
- Heating degree days
- 510
- Cooling degree days
- 0
Kasaan in June
Highs average 63°17° and lows 46°8°, with 4.1 in104 mm of precipitation in a typical June.
- Record high
- 89°32° (2021)
- Record low
- 34°1° (2012)
- Heating degree days
- 319
- Cooling degree days
- 1
Kasaan in July
Highs average 66°19° and lows 51°10°, with 5.3 in135 mm of precipitation in a typical July.
- Record high
- 90°32° (2009)
- Record low
- 38°3° (2010)
- Heating degree days
- 223
- Cooling degree days
- 7
Kasaan in August
Highs average 65°19° and lows 50°10°, with 7 in177 mm of precipitation in a typical August.
- Record high
- 90°32° (2020)
- Record low
- 32°0° (2010)
- Heating degree days
- 228
- Cooling degree days
- 3
Kasaan in September
Highs average 59°15° and lows 45°7°, with 8.6 in219 mm of precipitation in a typical September.
- Record high
- 83°28° (2017)
- Record low
- 32°0° (2009)
- Heating degree days
- 388
- Cooling degree days
- 0
Kasaan in OctoberThis month
Highs average 51°10° and lows 38°3°, with 12.1 in308 mm of precipitation in a typical October.
- Record high
- 71°22° (2008)
- Record low
- 17°−8° (2012)
- Heating degree days
- 642
- Cooling degree days
- 0
Kasaan in November
Highs average 42°5° and lows 32°0°, with 10.5 in267 mm of precipitation in a typical November.
- Record high
- 58°14° (2010)
- Record low
- 11°−12° (2013)
- Heating degree days
- 840
- Cooling degree days
- 0
Kasaan in December
Highs average 38°3° and lows 30°−1°, with 9.1 in231 mm of precipitation in a typical December.
- Record high
- 55°13° (2017)
- Record low
- −2°−19° (2007)
- Heating degree days
- 972
- Cooling degree days
- 0