Port Graham weather by month
What a typical year looks like in Port Graham, Alaska: average highs and lows, rain and snow, and the warmest and coldest days on record. Normals are the 1991–2020 averages at Seldovia Airport, 14 km from Port Graham; records cover 1997–2026.
The year at a glance
- Precipitation a year
- 40.4 in1026 mm
- Snow a year
- Rare
- Last spring freeze
- May 14
- First fall freeze
- Sep 28
- Heating degree days
- 9,289
- Cooling degree days
- 0
Freeze dates are medians (half of years earlier, half later). Degree days use a 65°F base; HVAC design temperatures here are 4°−16° (heating, 99%) and 71°22° (cooling, 1%).
Month by month
Port Graham in January
Highs average 31°−1° and lows 21°−6°, with 3.9 in98 mm of precipitation in a typical January.
- Record high
- 59°15° (2014)
- Record low
- −7°−22° (2009)
- Heating degree days
- 1215
- Cooling degree days
- 0
Port Graham in February
Highs average 34°1° and lows 23°−5°, with 3.7 in93 mm of precipitation in a typical February.
- Record high
- 54°12° (2024)
- Record low
- −4°−20° (1999)
- Heating degree days
- 1025
- Cooling degree days
- 0
Port Graham in March
Highs average 36°2° and lows 24°−5°, with 3.2 in81 mm of precipitation in a typical March.
- Record high
- 62°17° (2016)
- Record low
- 0°−18° (2010)
- Heating degree days
- 1100
- Cooling degree days
- 0
Port Graham in April
Highs average 43°6° and lows 31°−1°, with 2.8 in71 mm of precipitation in a typical April.
- Record high
- 66°19° (2005)
- Record low
- 6°−14° (2004)
- Heating degree days
- 842
- Cooling degree days
- 0
Port Graham in May
Highs average 51°11° and lows 37°3°, with 1.2 in29 mm of precipitation in a typical May.
- Record high
- 71°22° (2014)
- Record low
- 24°−4° (2001)
- Heating degree days
- 643
- Cooling degree days
- 0
Port Graham in June
Highs average 58°15° and lows 44°7°, with 1.2 in29 mm of precipitation in a typical June.
- Record high
- 77°25° (2015)
- Record low
- 34°1° (1999)
- Heating degree days
- 423
- Cooling degree days
- 0
Port Graham in July
Highs average 62°17° and lows 49°9°, with 1.6 in40 mm of precipitation in a typical July.
- Record high
- 82°28° (2004)
- Record low
- 37°3° (2008)
- Heating degree days
- 298
- Cooling degree days
- 0
Port Graham in August
Highs average 62°16° and lows 48°9°, with 2.7 in69 mm of precipitation in a typical August.
- Record high
- 82°28° (2024)
- Record low
- 33°1° (1998)
- Heating degree days
- 320
- Cooling degree days
- 0
Port Graham in September
Highs average 55°13° and lows 42°6°, with 4.1 in104 mm of precipitation in a typical September.
- Record high
- 70°21° (2026)
- Record low
- 27°−3° (2021)
- Heating degree days
- 494
- Cooling degree days
- 0
Port Graham in OctoberThis month
Highs average 45°7° and lows 34°1°, with 4.6 in117 mm of precipitation in a typical October.
- Record high
- 69°21° (2004)
- Record low
- 16°−9° (2008)
- Heating degree days
- 783
- Cooling degree days
- 0
Port Graham in November
Highs average 36°2° and lows 27°−3°, with 4.8 in123 mm of precipitation in a typical November.
- Record high
- 59°15° (2019)
- Record low
- 1°−17° (2021)
- Heating degree days
- 1005
- Cooling degree days
- 0
Port Graham in December
Highs average 33°0° and lows 24°−5°, with 6.7 in171 mm of precipitation in a typical December.
- Record high
- 59°15° (2019)
- Record low
- 1°−17° (2001)
- Heating degree days
- 1141
- Cooling degree days
- 0