Dutch Harbor, 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 Dutch Harbor's primary NOAA station, DUTCH HARBOR.
The climate verdict for Dutch Harbor
Water is the standout signal in Dutch Harbor, Alaska: 60.1 inches of precipitation in a normal year. Against that wet profile, NOAA records an annual average of 42°F. At 24/100 (below average) the climate comfort score falls in the bottom third of the station-mapped U.S. score corpus, exceeding only 0% of scores.
- 42°F
- yearly average temperature, NOAA normal
- 24/100
- comfort score, above 0% of station-mapped location scores
- 60.1"
- annual precipitation · 82" snow
- 165 days
- growing season, frost-free days
Dutch Harbor: NOAA 1991-2020 normals describe a typical year, not a forecast. Method: /methodology.
Normals record plate
Sheet USC00502587 · Dutch Harbor, AK 42°F mean · 60.1" precip
TEMP-COOL · RANK-COOL · PHOTO-FINISH · PRCP-WET · SWING-NARROW · COMF-LOW · LOAD-HEAT · STN-1 · BOOK-FULL
- TEMP-COOL 42°F
- RANK-COOL #549
- PHOTO-FINISH ≈ Rustic
- PRCP-WET 60.1"
- SWING-NARROW 21°F
- COMF-LOW 24/100
- LOAD-HEAT 8,526 HDD
- STN-1 USC00502587
- BOOK-FULL 6/6 fields
Nearest mean-temperature peer: Rustic, CO (+ 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.
- Dutch Harbor (this station) 42°F
- Cold Wolf Canyon, NM 42°F
- Hot Eagle Nest, NM 42°F
- Near Rustic, CO 42°F
- Near Chemult, OR 42°F
Dutch Harbor 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 · Dutch Harbor
Dutch Harbor: 25/100 · grade F
Dutch Harbor publishes 5 of 6 Living Index dimensions (NOAA annual/seasonal normals · NOAA daily multivariate normals); 1 missing weight rescale to 100.
PlainClimate-derived for Dutch Harbor, not an official NOAA rating. Rankings still use Comfort Score 24/100 (separate formula). Breakpoints and limits.
| Dimension | Station value | Score |
|---|---|---|
| Normal heat + freeze calendar | 139 calendar days | 53/100 · D |
| Frost-free season | 165 days/year | 38/100 · F |
| Precipitation balance | 60.1 in · 25.1 from 35 in | 12/100 · F |
| Annual temperature balance | 41.6°F · 25.9° from 67.5°F | 8/100 · F |
| Snowfall burden | 81.6 inches/year | 6/100 · F |
Dutch Harbor · 2026-08-04 · NOAA NCEI Climate Normals · method · Comfort Score method.
Dutch Harbor is a temperate Köppen climate: Cfc
Coldest-month mean 33.0°F and warmest-month mean 53.7°F place this station in temperate, no dry season, cool summer climates (Cfc). Class Cfc is the Peel et al. (2007) label for this station's monthly mean temperature and precipitation normals: temperate, specifically temperate, no dry season, cool summer.
- Köppen code
- Cfc
- Group
- Temperate
- Warmest month
- 53.7°F
- Coldest month
- 33.0°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 Dutch Harbor sits across the climate record
Three NOAA fields for Dutch Harbor's primary station, temperature, precipitation, and seasonal swing, are ranked against every station-mapped normal that carries the same field.
- Annual temperature
- Cooler than 92%
- Among 6,861 stations, Dutch Harbor sits in the cooler third of annual means.
- Annual precipitation
- Top 5% wettest
- Dutch Harbor'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 Dutch Harbor is compact versus 6,861 complete station-years.
How Dutch Harbor compares across U.S. station-mapped locations
Dutch Harbor's comfort score vs. all station-mapped locations
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
24 0th percentile score exceeds 0% 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%). This entry sits in this band.
- 30–40: 280 station-mapped locations (5%). Above this entry.
- 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
Dutch Harbor's measured station temperature trend
MethodologyAcross 56 complete annual observations from 1882 to 2022, DUTCH HARBOR warmed at a fitted rate of 0.22°C per decade. The line shows the fitted change relative to its first year, not raw year-to-year temperatures or a forecast.
- Dutch Harbor primary station fitted change +0.22 °C/decade
Monthly Temperatures
Average daily high and low temperatures by month
| Month | Avg High | Avg Low | Mean | Precip | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 37°F (3°C) | 29°F (-2°C) | 33°F (1°C) | 6.8" | 22.0" | 21.1 | 0.0 |
| February | 39°F (4°C) | 29°F (-1°C) | 34°F (1°C) | 5.2" | 14.2" | 17.5 | 0.0 |
| March | 39°F (4°C) | 29°F (-2°C) | 34°F (1°C) | 4.7" | 16.5" | 21.5 | 0.0 |
| April | 42°F (5°C) | 33°F (0°C) | 37°F (3°C) | 3.5" | 6.3" | 13.7 | 0.0 |
| May | 47°F (8°C) | 37°F (3°C) | 42°F (6°C) | 4.2" | 0.2" | 3.3 | 0.0 |
| June | 52°F (11°C) | 42°F (6°C) | 47°F (8°C) | 2.5" | 0.0" | 0.1 | 0.0 |
| July | 57°F (14°C) | 47°F (8°C) | 52°F (11°C) | 2.3" | 0.0" | 0.0 | 0.0 |
| August | 59°F (15°C) | 48°F (9°C) | 54°F (12°C) | 2.9" | 0.0" | 0.1 | 0.0 |
| September | 55°F (13°C) | 44°F (7°C) | 49°F (10°C) | 5.7" | 0.0" | 0.7 | 0.0 |
| October | 48°F (9°C) | 38°F (4°C) | 43°F (6°C) | 7.9" | 0.4" | 3.8 | 0.0 |
| November | 43°F (6°C) | 33°F (1°C) | 38°F (3°C) | 6.7" | 6.2" | 11.9 | 0.0 |
| December | 39°F (4°C) | 31°F (-1°C) | 35°F (2°C) | 7.9" | 15.8" | 18.8 | 0.0 |
The year, day by day
Summer here tops out rather than builds: the warmest normal high is 60°F around August 9, short of 90°F on every date, while 139 dates carry a normal low at or below freezing, the coldest 29°F near January 12.
The freezing stretch
The normal low stays at or below 32°F into April 13, then returns to freezing around November 27, covering 139 dates in all.
Derived from the normal daily minimum. This is a different measure from the 50%-probability frost dates shown elsewhere on this page, which come from NOAA’s frost product.
Where the wet dates fall
The likeliest wet date is October 16, when 80% of years recorded at least a hundredth of an inch. The driest is July 7 at 45%. Summed across the calendar, that is about 231 wet dates a year.
The widest day
August 16 carries the biggest normal gap between afternoon and dawn, 11°F between the normal high and the normal low.
Look up any date
Any date's 1991–2020 normal for Dutch Harbor.
Where Dutch Harbor Stands Nationally
This is one of the wettest normals climates ranked: about 60 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 11°F.
Dutch Harbor 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: 22.0"
22.0 days with precipitation
Snow: 14.2"
19.4 days with precipitation
Snow: 16.5"
19.2 days with precipitation
Snow: 6.3"
18.0 days with precipitation
Snow: 0.2"
18.1 days with precipitation
14.7 days with precipitation
13.6 days with precipitation
15.1 days with precipitation
20.1 days with precipitation
Snow: 0.4"
24.9 days with precipitation
Snow: 6.2"
22.5 days with precipitation
Snow: 15.8"
23.1 days with precipitation
Dutch Harbor spreads its precipitation across the year
Neither half of the year dominates here: June through August take 13% of the annual total and December through February 33%, with neither reaching the 35% that would mark a distinct wet season. Dutch Harbor has no dry season to plan around, though it does carry an unusually narrow 20.7°F seasonal spread.
The gap between the wettest and driest month still matters: October averages 7.9" and July 2.3". The three wettest months together take 38% 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.
How Dutch Harbor's precipitation splits across the calendar
About 231 days a year record measurable precipitation here, carrying 60.1" between them, or roughly 0.26 inches on a typical wet day. That sits in the middle band: neither the many-light-days pattern of the Pacific Northwest and the Great Lakes, nor the few-heavy-events pattern of the Gulf and the desert Southwest.
A wet day is one recording at least 0.01 inches. These are 1991-2020 normals: they describe an average year and say nothing about the heaviest single storm on record.
Winter brings real snow to Dutch Harbor
Dutch Harbor averages 81.6 inches of snowfall a year, with January the snowiest month on the normals, spread across roughly 45 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: 81.6 inches of depth.
- Days recording measurable snow: about 45 a year.
- At a rough ten-to-one melt ratio, snow accounts for on the order of 14% 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
October 18
50% probability date
Last Spring Freeze
May 6
50% probability date
Growing Season
165 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
8,526
Higher = more heating needed
Cooling Degree Days
1
Higher = more cooling needed
Warmest Month
August
Coldest Month
January
Nationwide similar cities
Other rankable U.S. places outside AK closest to Dutch Harbor 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 (42°F here).
- Cripple Creek, CO 42°F · 0.0°F off
- Greenland, MI 42°F · 0.0°F off
- Johnson, VT 42°F · 0.0°F off
- Judith Gap, MT 42°F · 0.0°F off
Closest by annual precipitation
Nearest out-of-state peers by annual precipitation (60.1" here), excluding temperature-peer places.
- Natchez, MS 60.1" · 0.0" off
- Hackberry, LA 60.1" · 0.0" off
- Wilmington, NC 60.1" · 0.0" off
- Rockford, AL 60.2" · 0.1" off
Snow and freeze rhythm
When cold and snow define Dutch Harbor
heating led · wet · low swing
Heating is the larger measured load in Dutch Harbor, at 8,526 degree days versus 1 for cooling. Unlike a strongly continental record, however, its 20.7°F month-to-month range is compact; persistent cool-season demand matters more than a dramatic summer-to-winter reversal.
Dutch Harbor's frost-free season lasts about 165 days, a middle-length window whose endpoints matter more than the annual average. It describes freeze probability, not year-specific planting conditions.
-
1. Dutch Harbor coldest normal
January
The monthly mean of 33°F (1°C) sits near freezing, so cold nights and above-freezing afternoons share the same month.
-
2. Dutch Harbor typical freeze period
January through December
The station reports average freezing days from January through December.
-
3. Dutch Harbor snow peak
January
Dutch Harbor averages 81.6 inches of snow a year, with January the snowiest month on the normals.
Questions about Dutch Harbor's climate
How much snow does Dutch Harbor get? ▼
How cold does Dutch Harbor get in winter? ▼
How much energy does heating and cooling require in Dutch Harbor? ▼
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). All figures on this page are from Dutch Harbor's primary station: DUTCH HARBOR (USC00502587). For informational purposes only.
Place identity: U.S. Census Bureau 2024 Gazetteer places. The conservative exact name-and-state crosswalk finds no Census place match, so PlainClimate treats this as a station-mapped location and does not claim it is a municipality. No exact Gazetteer row for Dutch Harbor; facility counts that depend on place identity are therefore an upper bound, not a municipal census.
On this page every temperature, precipitation, and derived score for Dutch Harbor 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.