Climate Comfort Score
48/100
Moderate
NOAA 1991–2020 normals 45°F annual avg Public-domain federal data
Sitka Airport, AK Climate
Explore average temperature, rainfall, and comfort score sourced from NOAA NCEI's 1991–2020 climate normals →
- 45°F
- Avg annual temp
- 48/100
- Comfort score
- 84.5"
- Annual precip
- 203d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Sitka Airport
Sitka Airport, Alaska averages 45°F a year and scores 48/100 on the comfort index - moderate, milder than 18% of U.S. cities.
- 45°F
- yearly average temperature, NOAA normal
- 48/100
- comfort score, milder than 18% of U.S. cities
- 84.5"
- yearly precipitation total
- 203 days
- frost-free days per growing season
Based on NOAA U.S. Climate Normals (1991–2020) - 30-year averages describing the typical year, not a forecast.
Avg Temperature
45°F (7°C)
Avg High
50°F
Avg Low
41°F
Annual Precip
84.5"
Comfort Score
48/100
Moderate
Avg Annual Temperature
45°F
30-year mean (NOAA NCEI)
Annual Precipitation
84.5"
Liquid-equivalent total
Comfort score vs national 100-point ceiling (Sitka Airport) 48.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Moderate for the Sitka Airport area.
How Sitka Airport compares to every U.S. city
Sitka Airport's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
48 Top 82% higher than 18% 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 Sitka Airport
MethodologySince 1900, U.S. land temperatures have tracked (and diverged from) the global mean - the chart below shows how. Sitka Airport's current NOAA 1991-2020 normal sits within that longer spread, and the most recent decade runs 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 | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|
| January | 41°F (5°C) | 32°F (0°C) | 37°F (3°C) | 8.2" | 13.7 | 0.0 |
| February | 41°F (5°C) | 32°F (0°C) | 37°F (3°C) | 5.9" | 14.0 | 0.0 |
| March | 43°F (6°C) | 33°F (0°C) | 38°F (3°C) | 5.6" | 14.4 | 0.0 |
| April | 48°F (9°C) | 37°F (3°C) | 43°F (6°C) | 4.3" | 4.6 | 0.0 |
| May | 53°F (12°C) | 43°F (6°C) | 48°F (9°C) | 3.8" | 0.2 | 0.0 |
| June | 58°F (14°C) | 48°F (9°C) | 53°F (12°C) | 2.9" | 0.0 | 0.0 |
| July | 60°F (16°C) | 53°F (11°C) | 57°F (14°C) | 4.6" | 0.0 | 0.0 |
| August | 62°F (17°C) | 53°F (12°C) | 57°F (14°C) | 7.3" | 0.0 | 0.0 |
| September | 58°F (14°C) | 49°F (9°C) | 53°F (12°C) | 11.7" | 0.0 | 0.0 |
| October | 51°F (10°C) | 42°F (5°C) | 46°F (8°C) | 11.8" | 1.9 | 0.0 |
| November | 44°F (7°C) | 36°F (2°C) | 40°F (4°C) | 9.9" | 8.3 | 0.0 |
| December | 42°F (5°C) | 33°F (1°C) | 38°F (3°C) | 8.4" | 12.4 | 0.0 |
Monthly Precipitation
Average monthly rainfall
January 8.2"
21.2 days with precipitation
February 5.9"
16.9 days with precipitation
March 5.6"
18.4 days with precipitation
April 4.3"
17.5 days with precipitation
May 3.8"
16.4 days with precipitation
June 2.9"
16.7 days with precipitation
July 4.6"
18.9 days with precipitation
August 7.3"
19.4 days with precipitation
September 11.7"
22.4 days with precipitation
October 11.8"
23.7 days with precipitation
November 9.9"
22.0 days with precipitation
December 8.4"
21.6 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
November 1
50% probability date
Last Spring Freeze
April 12
50% probability date
Growing Season
203 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
7,124
Higher = more heating needed
Cooling Degree Days
1
Higher = more cooling needed
Warmest Month
August
Coldest Month
January
Humidity & Wind
Monthly averages from hourly observations
| Month | Humidity | Wind (mph) | Clear Sky % | Overcast % |
|---|---|---|---|---|
| January | 77% | 8.8 | 21% | 61% |
| February | 71% | 8.1 | 33% | 49% |
| March | 74% | 7.9 | 22% | 51% |
| April | 74% | 7.7 | 26% | 53% |
| May | 81% | 6.8 | 21% | 59% |
| June | 84% | 6.2 | N/A | N/A |
| July | 86% | 5.9 | N/A | N/A |
| August | 85% | 6.1 | N/A | N/A |
| September | 83% | 7.4 | 18% | 60% |
| October | 78% | 8.9 | 16% | 55% |
| November | 77% | 9.6 | N/A | N/A |
| December | 75% | 9.4 | 27% | 53% |
What Sitka Airport's climate means for you
Sitka Airport runs 45°F a year - peaking in August, coldest in January.
- Gardeners get about 203 frost-free days, with the last spring freeze near April 12 - plan the planting calendar around it, not the regional average.
- Energy bills track 7,124 heating and 1 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: Sitka Airport, AK
The NOAA 1991–2020 climate normals describe Sitka Airport, Alaska as a location with an annual average temperature of 45°F, ranging from a mean daily high of 50°F to a mean daily low of 41°F. August is typically the warmest month of the year, while January is the coldest. These thirty-year averages, computed from station USW00025333, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.
Beyond temperature, Sitka Airport averages 84.5 inches of precipitation annually, predominantly as rainfall - a real factor for anyone planning to live, garden, or travel here. The frost-free season averages 203 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near April 12 and the first fall freeze near November 1. Turning to energy use, 7,124 heating degree days and 1 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Sitka Airport scores 48/100 (Moderate), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. The monthly tables above turn that into a planning tool: expect the mildest highs and lows in the shoulder seasons, August-driven heat at the peak of summer, and January-driven cold at the depth of winter. Every number here is a thirty-year average, not a forecast, so any given year can and does run warmer, cooler, wetter, or drier than the normal.
Frequently Asked Questions
What is the average temperature in Sitka Airport, AK? ▼
The average annual temperature in Sitka Airport, Alaska is 45°F. The warmest month averages 62°F (17°C) and the coldest averages 32°F (0°C).
How much rain does Sitka Airport get? ▼
Sitka Airport receives 84.5 inches of precipitation annually. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Sitka Airport? ▼
Sitka Airport has a climate comfort score of 48/100 (Moderate), milder than 18% of U.S. cities in the PlainClimate database.
When is the growing season in Sitka Airport? ▼
Sitka Airport has approximately 203 frost-free days per year, with the last spring freeze around April 12 and the first fall freeze around November 1.
How much energy does heating and cooling require in Sitka Airport? ▼
Sitka Airport has 7,124 heating degree days and 1 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 Sitka Airport climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USW00025333 near Sitka Airport.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USW00025333. 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.