Climate Comfort Score
39/100
Below Average
NOAA 1991–2020 normals 24°F annual avg Public-domain federal data
Port Alcan, AK Climate
Explore average temperature, rainfall, and comfort score sourced from NOAA NCEI's 1991–2020 climate normals →
- 24°F
- Avg annual temp
- 39/100
- Comfort score
- 11.0"
- Annual precip
- 93d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Port Alcan
Port Alcan, Alaska averages 24°F a year and scores 39/100 on the comfort index - below average, milder than 4% of U.S. cities.
- 24°F
- annual average temperature (NOAA normal)
- 39/100
- comfort score, milder than 4% of U.S. cities
- 11.0"
- annual precipitation · 27" snow
- 93 days
- frost-free growing season
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
24°F (-4°C)
Avg High
35°F
Avg Low
14°F
Annual Precip
11.0"
Annual Snow
27.4"
Comfort Score
39/100
Below Average
Avg Annual Temperature
24°F
30-year mean (NOAA NCEI)
Annual Precipitation
11.0"
Plus 27.4" of snow
Comfort score vs national 100-point ceiling (Port Alcan) 39.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Below Average for the Port Alcan area.
How Port Alcan compares to every U.S. city
Port Alcan's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
39 Top 96% higher than 4% of 6,915 US cities
Each bar is a band; taller bars hold more US cities. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Warming context for Port Alcan
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for Port Alcan captures average conditions across the spread shown, the most recent decade is warmer than the 30-year mean.
- United States land mean (NOAA NCEI) +0.11 °C/decade
- Global anomaly (NASA GISTEMP) +0.11 °C/decade
- Paris Agreement thresholds 1.5°C / 2.0°C
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | -5°F (-21°C) | -19°F (-28°C) | -12°F (-24°C) | 0.3" | 3.5" | 31.0 | 0.0 |
| February | 6°F (-14°C) | -13°F (-25°C) | -3°F (-20°C) | 0.3" | 2.9" | 28.0 | 0.0 |
| March | 23°F (-5°C) | -6°F (-21°C) | 8°F (-13°C) | 0.1" | 3.0" | 31.0 | 0.0 |
| April | 43°F (6°C) | 17°F (-8°C) | 30°F (-1°C) | 0.2" | 0.9" | 29.1 | 0.0 |
| May | 58°F (14°C) | 33°F (1°C) | 46°F (8°C) | 0.9" | 0.7" | 13.2 | 0.0 |
| June | 67°F (19°C) | 44°F (6°C) | 55°F (13°C) | 2.2" | 0.0" | 0.7 | 0.0 |
| July | 69°F (21°C) | 47°F (8°C) | 58°F (14°C) | 2.7" | 0.0" | 0.0 | 0.0 |
| August | 65°F (18°C) | 41°F (5°C) | 53°F (12°C) | 1.7" | 0.0" | 2.0 | 0.0 |
| September | 53°F (12°C) | 30°F (-1°C) | 42°F (5°C) | 1.0" | 0.5" | 18.7 | 0.0 |
| October | 31°F (-1°C) | 14°F (-10°C) | 23°F (-5°C) | 0.5" | 4.1" | 30.7 | 0.0 |
| November | 8°F (-14°C) | -7°F (-22°C) | 0°F (-18°C) | 0.7" | 7.1" | 30.0 | 0.0 |
| December | -2°F (-19°C) | -16°F (-27°C) | -9°F (-23°C) | 0.4" | 4.7" | 31.0 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 0.3"
Snow: 3.5"
3.7 days with precipitation
February 0.3"
Snow: 2.9"
3.1 days with precipitation
March 0.1"
Snow: 3.0"
2.3 days with precipitation
April 0.2"
Snow: 0.9"
2.4 days with precipitation
May 0.9"
Snow: 0.7"
5.7 days with precipitation
June 2.2"
12.5 days with precipitation
July 2.7"
13.0 days with precipitation
August 1.7"
11.0 days with precipitation
September 1.0"
Snow: 0.5"
8.0 days with precipitation
October 0.5"
Snow: 4.1"
5.4 days with precipitation
November 0.7"
Snow: 7.1"
5.6 days with precipitation
December 0.4"
Snow: 4.7"
4.6 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
August 29
50% probability date
Last Spring Freeze
May 28
50% probability date
Growing Season
93 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
14,873
Higher = more heating needed
Cooling Degree Days
10
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What Port Alcan's climate means for you
Port Alcan runs 24°F a year - peaking in July, coldest in January.
- Gardeners get about 93 frost-free days, with the last spring freeze near May 28 - plan the planting calendar around it, not the regional average.
- Energy bills track 14,873 heating and 10 cooling degree days a year, higher means the furnace or AC runs more.
- Comparing places to live? Line this city up against nearby cities and the national rankings. See rankings
These are 30-year NOAA normals (1991–2020) - the typical year, not a forecast for any specific season.
Climate Guides
Climate Insight: Port Alcan, AK
Port Alcan, Alaska runs an annual average of 24°F, ranging from a mean daily high of 35°F to a mean daily low of 14°F, per NOAA's 1991–2020 climate normals. July is typically the warmest month of the year, while January is the coldest. Drawn from station USC00507513, these thirty-year averages smooth out year-to-year swings into a baseline for what a typical month looks like here.
Port Alcan averages 11.0 inches of precipitation a year, with 27.4 inches typically falling as snow, and that matters as much to daily life here as temperature does. The frost-free season averages 93 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 28 and the first fall freeze near August 29. As for energy demand, 14,873 heating degree days and 10 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Port Alcan scores 39/100 (Below Average), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. For planning purposes, look to the monthly tables above: shoulder seasons bring the mildest highs and lows, summer brings July-driven heat, and deep winter brings January-driven cold. Treat every figure here as a thirty-year average rather than a forecast - individual years routinely run warmer, cooler, wetter, or drier than the normal.
Frequently Asked Questions
What is the average temperature in Port Alcan, AK? ▼
The average annual temperature in Port Alcan, Alaska is 24°F. The warmest month averages 69°F (21°C) and the coldest averages -19°F (-28°C).
How much rain does Port Alcan get? ▼
Port Alcan receives 11.0 inches of precipitation annually, including 27.4 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Port Alcan? ▼
Port Alcan has a climate comfort score of 39/100 (Below Average), milder than 4% of U.S. cities in the PlainClimate database.
When is the growing season in Port Alcan? ▼
Port Alcan has approximately 93 frost-free days per year, with the last spring freeze around May 28 and the first fall freeze around August 29.
How much energy does heating and cooling require in Port Alcan? ▼
Port Alcan has 14,873 heating degree days and 10 cooling degree days annually, a heating-dominated climate. See our <a href="/guides/reading-weather-data/" class="underline hover:text-brand-600">guide to reading weather data</a> for what these figures mean.
Where does this Port Alcan climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00507513 near Port Alcan.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00507513. For informational purposes only.
Read our methodology - how this data is sourced, computed, and verified.
Related
Data sourced from official public datasets. See our methodology for details. Retrieved and formatted by PlainClimate Editorial
Every figure on PlainClimate is rendered directly from NOAA 1991-2020 U.S. Climate Normals data, no number is typed in by an editor. This page draws directly on NOAA 1991-2020 U.S. Climate Normals data, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error.