Port Alexander, AK Climate: Temperature & Rain by Month
Average temperature and precipitation from NOAA NCEI 1991–2020 normals →, with a derived climate comfort score
30-year climate normals (1991-2020) from Port Alexander's primary NOAA station, PORT ALEXANDER.
The climate verdict for Port Alexander
Water is the standout signal in Port Alexander, Alaska: 162.0 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 46°F. At 38/100 (below average) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 4% of scores.
- 46°F
- average temperature, NOAA 1991-2020 normal
- 38/100
- comfort score, above 4% of station-mapped location scores
- 162.0"
- annual precipitation · 56" snow
- 201 days
- growing season, frost-free days
Port Alexander: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00507557 · Port Alexander, AK 46°F mean · 162.0" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-WET · SWING-NARROW · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 46°F
- RANK-COOL #1,441
- PHOTO-FINISH ≈ Gascon
- PRCP-WET 162.0"
- SWING-NARROW 21°F
- COMF-LOW 38/100
- LOAD-HEAT 7,049 HDD
- STN-1 USC00507557
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Gascon, NM (+ 0 °F mean)
Instrument codes from this station's NOAA 1991–2020 normals, mean temperature, corpus warmth rank, photo-finish peer station, precipitation band, seasonal swing, comfort composite, degree-day load, and field book, not a livability rating.
Mean-temperature neighbourhood
Nationwide NOAA normal poles and nearest peers, not a reprint of every AK station list.
- Port Alexander (this station) 46°F
- Hot Alpine, AZ 46°F
- Near Gascon, NM 46°F
- Near Cloudcroft, NM 46°F
- Near Metlakatla, AK 46°F
Port Alexander sits in Alaska, the #1 coldest U.S. state at 33.5°F statewide annual average - see all 50 coldest states ranked by NOAA normals
Climate Living Index · Port Alexander
Port Alexander: 46/100 · grade D
Port Alexander publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Port Alexander, not an official NOAA rating. Rankings still use Comfort Score 38/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 0 calendar days | 100/100 · A |
| Frost-free season | 201 days/year | 65/100 · C |
| Annual temperature balance | 45.6°F · 21.9° from 67.5°F | 22/100 · F |
| Snowfall burden | 56.0 inches/year | 18/100 · F |
| Precipitation balance | 162.0 in · 127.0 from 35 in | 0/100 · F |
Port Alexander · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Port Alexander is a temperate Köppen climate: Cfb
Coldest-month mean 36.0°F and warmest-month mean 57.2°F place this station in temperate, no dry season, warm summer climates (Cfb). Class Cfb is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, no dry season, warm summer.
- Köppen code
- Cfb
- Group
- Temperate
- Warmest month
- 57.2°F
- Coldest month
- 36.0°F
Source: official public datasets monthly normals (1991–2020) at the city’s primary station. This is a station classification, not a mapped regional consensus.
National standing · heating-led station
Where Port Alexander sits across the climate record
Three NOAA fields for Port Alexander's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 79%
- Among 6,861 stations, Port Alexander sits in the cooler third of annual means.
- Annual precipitation
- Top 1% wettest
- Port Alexander's annual total ranks in the wetter third of 6,352 measured normals.
- Seasonal temperature swing
- Narrower than 96%
- Warmest-to-coldest month gap for Port Alexander is compact versus 6,861 complete station-years.
How Port Alexander compares across U.S. station-mapped locations
Port Alexander's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
38 4th percentile score exceeds 4% of 6,189 station-mapped location scores
- 0–10: 0 station-mapped locations (0%). Below this entry.
- 10–20: 0 station-mapped locations (0%). Below this entry.
- 20–30: 96 station-mapped locations (2%). Below this entry.
- 30–40: 280 station-mapped locations (5%). This entry sits in this band.
- 40–50: 1,113 station-mapped locations (18%). Above this entry.
- 50–60: 1,329 station-mapped locations (21%). Above this entry.
- 60–70: 1,236 station-mapped locations (20%). Above this entry.
- 70–80: 650 station-mapped locations (11%). Above this entry.
- 80–90: 921 station-mapped locations (15%). Above this entry.
- 90–100: 564 station-mapped locations (9%). Above this entry.
Source NOAA U.S. Climate Normals, PlainClimate comfort index · 1991–2020
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 40°F (4°C) | 32°F (0°C) | 36°F (2°C) | 16.3" | 12.3" | 13.3 | 0.0 |
| February | 41°F (5°C) | 33°F (0°C) | 37°F (3°C) | 11.7" | 12.0" | 12.4 | 0.0 |
| March | 43°F (6°C) | 33°F (0°C) | 38°F (3°C) | 11.1" | 11.9" | 14.9 | 0.0 |
| April | 50°F (10°C) | 37°F (3°C) | 43°F (6°C) | 8.6" | 1.2" | 5.1 | 0.0 |
| May | 57°F (14°C) | 42°F (5°C) | 49°F (10°C) | 7.9" | 0.1" | 0.3 | 0.0 |
| June | 61°F (16°C) | 47°F (8°C) | 54°F (12°C) | 6.7" | 0.0" | 0.0 | 0.0 |
| July | 64°F (18°C) | 50°F (10°C) | 57°F (14°C) | 9.0" | 0.0" | 0.0 | 0.0 |
| August | 64°F (18°C) | 50°F (10°C) | 57°F (14°C) | 13.9" | 0.0" | 0.0 | 0.0 |
| September | 58°F (15°C) | 47°F (8°C) | 53°F (11°C) | 19.3" | 0.0" | 0.0 | 0.0 |
| October | 51°F (11°C) | 42°F (5°C) | 46°F (8°C) | 19.9" | 0.3" | 1.6 | 0.0 |
| November | 44°F (7°C) | 36°F (2°C) | 40°F (5°C) | 18.1" | 4.1" | 7.2 | 0.0 |
| December | 41°F (5°C) | 33°F (1°C) | 37°F (3°C) | 19.6" | 14.1" | 13.2 | 0.0 |
The year, day by day
The calendar barely moves in Port Alexander: no date carries a normal high of 90°F or a normal low at freezing. The year runs between 32°F near March 4 and 65°F near July 31.
No freezing date
Not one calendar date in the 1991–2020 record carries a normal low at or below 32°F. The coldest normal low of the year is 32°F around March 4.
Where the wet dates fall
The likeliest wet date is October 13, when 83% of years recorded at least a hundredth of an inch. The driest is June 11 at 51%. Summed across the calendar, that is about 248 wet dates a year.
The widest day
May 26 carries the biggest normal gap between afternoon and dawn, 15°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Port Alexander.
Where Port Alexander Stands Nationally
This is one of the wettest normals climates ranked: about 162 inches of precipitation in a normal year, a total fewer than one station in ten surpasses.
Among the steadiest day-night climates ranked: even the widest normal daily swing holds to roughly 15°F.
Port Alexander earns 2 nationally notable standings (outer quintiles) against 6,860 NOAA 1991–2020 normals stations; only those extremes render.
Monthly Precipitation
Average monthly rainfall and snowfall
Snow: 12.3"
23.7 days with precipitation
Snow: 12.0"
19.4 days with precipitation
Snow: 11.9"
21.5 days with precipitation
Snow: 1.2"
19.2 days with precipitation
Snow: 0.1"
16.6 days with precipitation
15.5 days with precipitation
16.6 days with precipitation
18.5 days with precipitation
23.3 days with precipitation
Snow: 0.3"
25.3 days with precipitation
Snow: 4.1"
24.1 days with precipitation
Snow: 14.1"
24.4 days with precipitation
Port Alexander spreads its precipitation across the year
Neither half of the year dominates here: June through August take 18% of the annual total and December through February 29%, with neither reaching the 35% that would mark a distinct wet season. Port Alexander has no dry season to plan around, though it does carry an unusually narrow 21.2°F seasonal spread.
The gap between the wettest and driest month still matters: October averages 19.9" and June 6.7". The three wettest months together take 36% of the year, against the 25% a perfectly flat distribution would give them.
Shares are computed from this station's own 1991-2020 monthly precipitation normals. "Spread across the year" means neither the June-August nor the December-February share reaches 35%; it describes an average year, not the variability of any single one.
When it rains in Port Alexander, it arrives in quantity
162.0" of precipitation falls across only about 248 wet days here, averaging 0.65 inches each. Fewer days carry more water: the year's total is delivered in comparatively heavy events rather than persistent damp.
- Days with measurable precipitation
- about 248 a year, 68% of all days
- Average depth per wet day
- 0.65 inches
- Most wet days
- October, about 25
- Fewest wet days
- June, about 16
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year, and a per-day average is not a forecast of any individual storm.
Winter brings real snow to Port Alexander
Port Alexander averages 56.0 inches of snowfall a year, with December the snowiest month on the normals, spread across roughly 24 days that record measurable snow. That is depth accumulating on the ground, which is why it can exceed the annual precipitation figure: precipitation counts the liquid the snow melts down to, and fresh snow is mostly air.
- Annual snowfall: 56.0 inches of depth.
- Days recording measurable snow: about 24 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 3% of the year's precipitation.
NOAA 1991-2020 normals. The ten-to-one ratio is a convention, not a measurement: real ratios vary with temperature, so treat the share as an order of magnitude rather than an exact split.
Frost Dates & Growing Season
First Fall Freeze
November 5
50% probability date
Last Spring Freeze
April 18
50% probability date
Growing Season
201 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
7,049
Higher = more heating needed
Cooling Degree Days
2
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside AK closest to Port Alexander on two NOAA annual-normal axes (mean temperature and annual precipitation). Chip rows use distinct link sets.
Closest by average temperature
Nearest out-of-state peers by annual mean temperature (46°F here).
- Appleton, WI 46°F · 0.0°F off
- Cobleskill, NY 46°F · 0.0°F off
- Downey, ID 46°F · 0.0°F off
- La Crosse, WI 46°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (162.0" here), excluding temperature-peer places.
- Hilo, HI 120.4" · 41.6" off
- Forks, WA 119.9" · 42.1" off
- Cougar, WA 115.3" · 46.7" off
- Naselle, WA 112.2" · 49.8" off
Snow and freeze rhythm
When cold and snow define Port Alexander
heating led · wet · low swing
Heating is the larger measured load in Port Alexander, at 7,049 degree days versus 2 for cooling. Unlike a strongly continental record, however, its 21.2°F month-to-month range is compact; persistent cool-season demand matters more than a dramatic summer-to-winter reversal.
Port Alexander's frost-free season lasts about 201 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
-
1. Port Alexander coldest normal
January
The monthly mean of 36°F (2°C) sits near freezing, so cold nights and above-freezing afternoons share the same month.
-
2. Port Alexander typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Port Alexander snow peak
December
Port Alexander averages 56.0 inches of snow a year, with December the snowiest month on the normals.
Questions about Port Alexander's climate
How much snow does Port Alexander get? ▼
How much energy does heating and cooling require in Port Alexander? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Port Alexander's primary station: PORT ALEXANDER (USC00507557). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The 2024 Census Gazetteer identifies the exact name-and-state match as an incorporated place (GEOID 0262510). Match rule for Port Alexander: exact normalized name + state only, no fuzzy expansion, so nearby differently spelled facilities stay unmatched.
On this page every temperature, precipitation, and derived score for Port Alexander comes from its primary NOAA station record. No figure on this page is typed in by an editor - each value is rendered from NOAA 1991-2020 U.S. Climate Normals. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 1991–2020 normals.