Kupreanof weather by month
What a typical year looks like in Kupreanof, Alaska: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Petersburg 1, 3 km from Kupreanof; records cover 1926–2026.
The year at a glance
- Precipitation a year
- 110.2 in2799 mm
- Snow a year
- 86 in217 cm
- Last spring freeze
- Apr 29
- First fall freeze
- Oct 9
- Heating degree days
- 8,019
- Cooling degree days
- 1
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 6°−14° (heating, 99%) and 74°23° (cooling, 1%).
Month by month
Kupreanof in January
Highs average 35°1° and lows 27°−3°, with 11.4 in289 mm of precipitation and 21 in53 cm of snow in a typical January.
- Record high
- 65°18° (2018)
- Record low
- −19°−28° (1947)
- Heating degree days
- 1057
- Cooling degree days
- 0
Kupreanof in February
Highs average 37°3° and lows 28°−2°, with 7.6 in193 mm of precipitation and 17 in43 cm of snow in a typical February.
- Record high
- 66°19° (1992)
- Record low
- −15°−26° (1968)
- Heating degree days
- 921
- Cooling degree days
- 0
Kupreanof in March
Highs average 40°5° and lows 30°−1°, with 7.6 in193 mm of precipitation and 20 in51 cm of snow in a typical March.
- Record high
- 66°19° (2019)
- Record low
- −6°−21° (1955)
- Heating degree days
- 932
- Cooling degree days
- 0
Kupreanof in April
Highs average 48°9° and lows 35°2°, with 6.7 in169 mm of precipitation and 1.1 in2.8 cm of snow in a typical April.
- Record high
- 73°23° (2004)
- Record low
- 10°−12° (1948)
- Heating degree days
- 706
- Cooling degree days
- 0
Kupreanof in May
Highs average 55°13° and lows 42°5°, with 5.9 in149 mm of precipitation and 0.2 in0.5 cm of snow in a typical May.
- Record high
- 79°26° (1995)
- Record low
- 21°−6° (1956)
- Heating degree days
- 512
- Cooling degree days
- 0
Kupreanof in June
Highs average 60°16° and lows 48°9°, with 5 in126 mm of precipitation in a typical June.
- Record high
- 83°28° (1958)
- Record low
- 29°−2° (1933)
- Heating degree days
- 331
- Cooling degree days
- 1
Kupreanof in July
Highs average 62°17° and lows 51°11°, with 5.6 in143 mm of precipitation in a typical July.
- Record high
- 84°29° (1927)
- Record low
- 37°3° (1938)
- Heating degree days
- 268
- Cooling degree days
- 0
Kupreanof in August
Highs average 61°16° and lows 50°10°, with 8.2 in209 mm of precipitation in a typical August.
- Record high
- 83°28° (2013)
- Record low
- 32°0° (1948)
- Heating degree days
- 287
- Cooling degree days
- 0
Kupreanof in September
Highs average 56°13° and lows 46°8°, with 14.4 in364 mm of precipitation in a typical September.
- Record high
- 81°27° (1938)
- Record low
- 22°−6° (1972)
- Heating degree days
- 428
- Cooling degree days
- 0
Kupreanof in OctoberThis month
Highs average 47°9° and lows 39°4°, with 13.8 in352 mm of precipitation and 0.4 in1 cm of snow in a typical October.
- Record high
- 72°22° (1938)
- Record low
- 12°−11° (1971)
- Heating degree days
- 673
- Cooling degree days
- 0
Kupreanof in November
Highs average 39°4° and lows 32°0°, with 12.3 in312 mm of precipitation and 11 in27 cm of snow in a typical November.
- Record high
- 64°18° (1970)
- Record low
- −8°−22° (1985)
- Heating degree days
- 876
- Cooling degree days
- 0
Kupreanof in December
Highs average 35°2° and lows 28°−2°, with 11.8 in299 mm of precipitation and 16 in39 cm of snow in a typical December.
- Record high
- 59°15° (1944)
- Record low
- −10°−23° (1964)
- Heating degree days
- 1028
- Cooling degree days
- 0