Alcan Border weather by month
What a typical year looks like in Alcan Border, Alaska: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Port Alcan, 13 km from Alcan Border; records cover 1985–2026.
The year at a glance
- Precipitation a year
- 11 in279 mm
- Snow a year
- 27 in70 cm
- Last spring freeze
- May 22
- First fall freeze
- Aug 27
- Heating degree days
- 14,874
- 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 −46°−43° (heating, 99%) and 81°27° (cooling, 1%).
Month by month
Alcan Border in January
Highs average −5°−21° and lows −19°−28°, with 0.26 in6.6 mm of precipitation and 4 in9 cm of snow in a typical January.
- Record high
- 45°7° (2025)
- Record low
- −55°−48° (2009)
- Heating degree days
- 2392
- Cooling degree days
- 0
Alcan Border in February
Highs average 6°−14° and lows −13°−25°, with 0.26 in6.6 mm of precipitation and 2.9 in7.4 cm of snow in a typical February.
- Record high
- 47°8° (2000)
- Record low
- −56°−49° (1993)
- Heating degree days
- 1915
- Cooling degree days
- 0
Alcan Border in March
Highs average 23°−5° and lows −6°−21°, with 0.14 in3.6 mm of precipitation and 3 in8 cm of snow in a typical March.
- Record high
- 52°11° (2019)
- Record low
- −49°−45° (2007)
- Heating degree days
- 1753
- Cooling degree days
- 0
Alcan Border in April
Highs average 43°6° and lows 17°−8°, with 0.21 in5.3 mm of precipitation and 0.9 in2.3 cm of snow in a typical April.
- Record high
- 70°21° (1989)
- Record low
- −38°−39° (2026)
- Heating degree days
- 1058
- Cooling degree days
- 0
Alcan Border in May
Highs average 58°14° and lows 33°1°, with 0.88 in22 mm of precipitation and 0.7 in1.8 cm of snow in a typical May.
- Record high
- 82°28° (2015)
- Record low
- 10°−12° (2013)
- Heating degree days
- 603
- Cooling degree days
- 0
Alcan Border in June
Highs average 67°19° and lows 44°6°, with 2.2 in57 mm of precipitation in a typical June.
- Record high
- 88°31° (1987)
- Record low
- 26°−3° (2023)
- Heating degree days
- 297
- Cooling degree days
- 6
Alcan Border in July
Highs average 69°21° and lows 47°8°, with 2.7 in69 mm of precipitation in a typical July.
- Record high
- 94°34° (2004)
- Record low
- 30°−1° (2026)
- Heating degree days
- 222
- Cooling degree days
- 4
Alcan Border in August
Highs average 65°18° and lows 41°5°, with 1.7 in44 mm of precipitation in a typical August.
- Record high
- 89°32° (2024)
- Record low
- 24°−4° (1986)
- Heating degree days
- 373
- Cooling degree days
- 1
Alcan Border in September
Highs average 53°12° and lows 30°−1°, with 1 in26 mm of precipitation and 0.5 in1.3 cm of snow in a typical September.
- Record high
- 78°26° (1993)
- Record low
- 0°−18° (1992)
- Heating degree days
- 704
- Cooling degree days
- 0
Alcan Border in OctoberThis month
Highs average 31°−1° and lows 14°−10°, with 0.51 in13 mm of precipitation and 4 in10 cm of snow in a typical October.
- Record high
- 60°16° (2020)
- Record low
- −26°−32° (1996)
- Heating degree days
- 1313
- Cooling degree days
- 0
Alcan Border in November
Highs average 8°−14° and lows −7°−22°, with 0.65 in17 mm of precipitation and 7 in18 cm of snow in a typical November.
- Record high
- 44°7° (2022)
- Record low
- −47°−44° (1989)
- Heating degree days
- 1942
- Cooling degree days
- 0
Alcan Border in December
Highs average −2°−19° and lows −16°−27°, with 0.39 in9.9 mm of precipitation and 5 in12 cm of snow in a typical December.
- Record high
- 55°13° (1999)
- Record low
- −52°−47° (2025)
- Heating degree days
- 2302
- Cooling degree days
- 0