Climate Comfort Score
24/100
Below Average
NOAA 1991–2020 normals 40°F annual avg Public-domain federal data
Main Bay, AK Climate
Annual temperature, rainfall, and a comfort score, sourced from NOAA NCEI's 1991–2020 normals →
- 40°F
- Avg annual temp
- 24/100
- Comfort score
- 206.9"
- Annual precip
- 140d
- Growing season
30-year climate normals from 1 weather station (1991-2020).
The climate verdict for Main Bay
Main Bay, Alaska averages 40°F a year and scores 24/100 on the comfort index - below average, milder than 0% of U.S. cities.
- 40°F
- annual average temperature (NOAA normal)
- 24/100
- comfort score, milder than 0% of U.S. cities
- 206.9"
- annual precipitation · 262" snow
- 140 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
40°F (4°C)
Avg High
46°F
Avg Low
33°F
Annual Precip
206.9"
Annual Snow
261.8"
Comfort Score
24/100
Below Average
Avg Annual Temperature
40°F
30-year mean (NOAA NCEI)
Annual Precipitation
206.9"
Plus 261.8" of snow
Comfort score vs national 100-point ceiling (Main Bay) 24.0%
National median (63)
PlainClimate composite, temperature mildness, humidity, precipitation, extreme-weather frequency. Below Average for the Main Bay area.
How Main Bay compares to every U.S. city
Main Bay's comfort score vs. all U.S. cities
PlainClimate composite comfort index (1–100), NOAA 1991–2020 normals
24 Top 100% higher than 0% 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 Main Bay
MethodologySince 1900, U.S. land temperatures have tracked (and diverged from) the global mean - the chart below shows how. Main Bay'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 | Snow | Freeze Days | 90°F+ Days |
|---|---|---|---|---|---|---|---|
| January | 31°F (0°C) | 21°F (-6°C) | 26°F (-3°C) | 18.8" | 55.3" | 27.8 | 0.0 |
| February | 33°F (0°C) | 22°F (-6°C) | 27°F (-3°C) | 16.7" | 48.6" | 25.1 | 0.0 |
| March | 37°F (3°C) | 22°F (-5°C) | 30°F (-1°C) | 14.3" | 57.4" | 28.4 | 0.0 |
| April | 44°F (7°C) | 30°F (-1°C) | 37°F (3°C) | 14.1" | 11.8" | 19.2 | 0.0 |
| May | 52°F (11°C) | 35°F (2°C) | 43°F (6°C) | 13.2" | 0.5" | 7.4 | 0.0 |
| June | 59°F (15°C) | 43°F (6°C) | 51°F (11°C) | 7.9" | 0.0" | 0.1 | 0.0 |
| July | 62°F (17°C) | 50°F (10°C) | 56°F (13°C) | 10.9" | 0.0" | 0.0 | 0.0 |
| August | 61°F (16°C) | 49°F (10°C) | 55°F (13°C) | 17.3" | 0.0" | 0.0 | 0.0 |
| September | 55°F (13°C) | 43°F (6°C) | 49°F (10°C) | 24.9" | 0.0" | 1.0 | 0.0 |
| October | 45°F (7°C) | 34°F (1°C) | 40°F (4°C) | 24.8" | 4.3" | 12.6 | 0.0 |
| November | 36°F (2°C) | 26°F (-3°C) | 31°F (0°C) | 21.0" | 25.7" | 23.2 | 0.0 |
| December | 33°F (1°C) | 24°F (-5°C) | 28°F (-2°C) | 23.0" | 58.2" | 27.3 | 0.0 |
Monthly Precipitation
Average monthly rainfall and snowfall
January 18.8"
Snow: 55.3"
19.1 days with precipitation
February 16.7"
Snow: 48.6"
17.6 days with precipitation
March 14.3"
Snow: 57.4"
16.6 days with precipitation
April 14.1"
Snow: 11.8"
16.9 days with precipitation
May 13.2"
Snow: 0.5"
16.8 days with precipitation
June 7.9"
15.9 days with precipitation
July 10.9"
18.2 days with precipitation
August 17.3"
19.3 days with precipitation
September 24.9"
22.6 days with precipitation
October 24.8"
Snow: 4.3"
22.3 days with precipitation
November 21.0"
Snow: 25.7"
19.2 days with precipitation
December 23.0"
Snow: 58.2"
22.1 days with precipitation
Frost Dates & Growing Season
First Fall Freeze
October 6
50% probability date
Last Spring Freeze
May 19
50% probability date
Growing Season
140 days
Heating & Cooling Degree Days
Annual totals indicate energy demand for heating and cooling
Heating Degree Days
9,293
Higher = more heating needed
Cooling Degree Days
2
Higher = more cooling needed
Warmest Month
July
Coldest Month
January
What Main Bay's climate means for you
Main Bay runs 40°F a year - peaking in July, coldest in January.
- Gardeners get about 140 frost-free days, with the last spring freeze near May 19 - plan the planting calendar around it, not the regional average.
- Energy bills track 9,293 heating and 2 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: Main Bay, AK
The NOAA 1991–2020 climate normals describe Main Bay, Alaska as a location with an annual average temperature of 40°F, ranging from a mean daily high of 46°F to a mean daily low of 33°F. July is typically the warmest month of the year, while January is the coldest. These thirty-year averages, computed from station USC00505604, smooth out year-to-year variability and give a baseline expectation for typical conditions in any given month.
Anyone planning to live, garden, or travel in Main Bay should weigh precipitation alongside temperature: the annual average runs 206.9 inches, with 261.8 inches typically falling as snow. The frost-free season averages 140 days, which directly shapes the planting calendar and growing potential for the area, with the last spring freeze near May 19 and the first fall freeze near October 6. And on the energy front, 9,293 heating degree days and 2 cooling degree days tell the story of how often furnaces and air conditioners run during a normal year.
On PlainClimate's composite comfort index, Main Bay scores 24/100 (Below Average), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. Shoulder seasons bring the mildest highs and lows in the monthly tables above, summer brings July-driven heat, and winter brings January-driven cold - use that rhythm for planning. These figures are thirty-year averages rather than forecasts, so a specific year may still run warmer, cooler, wetter, or drier than what's shown.
Frequently Asked Questions
What is the average temperature in Main Bay, AK? ▼
The average annual temperature in Main Bay, Alaska is 40°F. The warmest month averages 62°F (17°C) and the coldest averages 21°F (-6°C).
How much rain does Main Bay get? ▼
Main Bay receives 206.9 inches of precipitation annually, including 261.8 inches of snow. Based on NOAA 30-year climate normals (1991-2020).
What is the comfort score for Main Bay? ▼
Main Bay has a climate comfort score of 24/100 (Below Average), milder than 0% of U.S. cities in the PlainClimate database.
When is the growing season in Main Bay? ▼
Main Bay has approximately 140 frost-free days per year, with the last spring freeze around May 19 and the first fall freeze around October 6.
How much energy does heating and cooling require in Main Bay? ▼
Main Bay has 9,293 heating degree days and 2 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 Main Bay climate data come from? ▼
NOAA U.S. Climate Normals v1.0.1 (1991-2020), from weather station USC00505604 near Main Bay.
Data Sources
Data source: NOAA U.S. Climate Normals v1.0.1 (1991-2020). Station: USC00505604. 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.