Port Graham has chilly winters and cool summers
A typical July afternoon reaches 62°, a January night drops to 21°.
A year in Port Graham at a glance
Each month’s typical high and low, and what it brings.
What stands out about Port Graham’s climate
Read from where Port Graham sits among Alaska’s towns. The page puts what stands out first.
What a year in Port Graham feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
Rain and snow in Port Graham
December is the wettest month and May the driest.
Rain + melted snow by month
Inches of water
Snowfall by month
No snow records from a nearby station.
About 145 frost-free days a year
In half of years the last 32° night comes by May 10 and the first by October 1.
Freezing nights by month
Average nights at or below 32°
Living with Port Graham’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
145 frost-free days. The last frost comes by May 10 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 1.
Months averaging under 55° run from August through June. Heating is 100% of the year’s heating-and-cooling load.
90° days are rare: July afternoons average 62°.
Normals are averages. Ice storms, nor’easters, floods and heat waves are on the natural hazards page.
Natural hazards →How Port Graham compares
Against every U.S. town on TownTapestry, each counted once, with its place in Alaska.
Port Graham weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt |
|---|---|---|---|
| January | 31° | 21° | 3.9" |
| February | 34° | 23° | 3.7" |
| March | 36° | 24° | 3.2" |
| April | 43° | 31° | 2.8" |
| May | 51° | 37° | 1.2" |
| June | 58° | 44° | 1.2" |
| July | 62° | 49° | 1.6" |
| August | 62° | 48° | 2.7" |
| September | 55° | 42° | 4.1" |
| October | 45° | 34° | 4.6" |
| November | 36° | 27° | 4.8" |
| December | 33° | 24° | 6.7" |
| Year | 45° | 34° | 40.4" |
Heating and cooling a home in Port Graham
100% of the work is heating, so the furnace matters far more than the air conditioner.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. Source: NOAA station normals.
Common questions about Port Graham’s climate
What is the coldest month in Port Graham?
January, with a typical high of 31° and a low of 21°.
What is the hottest month in Port Graham?
July, with a typical high of 62° and a low of 49°.
When is the first frost in Port Graham?
In half of years the first 32° night comes by October 1, and the last spring frost by May 10.
What is the rainiest month in Port Graham?
December, with 6.7 inches of rain and melted snow. The year totals 40 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Port Graham.
Your answer becomes a post in Town Square.
NOAA’s gridded normals don’t cover this state, so temperatures and rainfall come from the nearest weather station. Snow, frost dates and day counts come from NOAA’s weather station at Seldovia Airport, AK (9 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020. Today’s forecast: National Weather Service.