Climate Comfort Score
27/100
Below Average
2026 data Public-data reference. official source
Main Bay, AK Climate
Temperature, precipitation, and comfort score from NOAA NCEI 1991-2020 normals →
30-year climate normals from 1 weather station (1991-2020).
Main Bay, Alaska has an average annual temperature of 40°F and a climate comfort score of 27/100 (Below Average). Annual precipitation totals 206.9", including 261.8" of snow. Based on NOAA 30-year normals (1991–2020).
Avg Temperature
40°F (4°C)
Avg High
46°F
Avg Low
33°F
Annual Precip
206.9"
Annual Snow
261.8"
Comfort Score
27/100
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) 27.0%
National median (≈55)
PlainClimate composite — temperature mildness, humidity, precipitation, extreme-weather frequency. Below Average for the Main Bay area.
Warming context for Main Bay
MethodologyHow the U.S. land temperature anomaly tracks against the global mean since 1900. The current NOAA 1991-2020 normal for Main Bay 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 | 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
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
Related Data
PlainEnviro
EPA environmental data — pollution, water quality, and environmental health by location
PlainCarbon
Carbon emissions data — greenhouse gas reporting and facility-level CO2 data
PlainHazard
Natural disaster data — weather-related hazards, FEMA declarations, and risk profiles
PlainAirData
EPA air quality data — AQI readings, pollutant levels, and air quality trends
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.
Precipitation patterns matter as much as temperature for anyone planning to live, garden, or travel here. Main Bay receives roughly 206.9 inches of precipitation each year, with 261.8 inches typically falling as snow. Growing-season length varies with elevation and microclimate, with the last spring freeze near May 19 and the first fall freeze near October 6. For energy use, 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 27/100 (Below Average), a blended measure that weighs temperature mildness, precipitation moderation, and extreme-weather frequency against one another. Use the monthly tables above to plan around specific windows — shoulder seasons for mild highs and lows, peak summer for July-driven heat, or deep winter for January-driven cold. All figures here are thirty-year averages: any single year may run warmer, wetter, drier, or cooler than the normal, so treat them as planning guidance rather than forecasts.
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 27/100 (Below Average). This score considers temperature mildness, humidity, precipitation, and extreme weather frequency.
When is the growing season in Main Bay? ▼
Growing season data is not available for Main Bay.
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. Higher heating degree days indicate greater winter energy demand, while higher cooling degree days indicate greater summer cooling needs.
Where does this Main Bay climate data come from? ▼
All climate data comes from NOAA U.S. Climate Normals v1.0.1, covering the 30-year period from 1991 to 2020. Data is collected from weather station USC00505604. These 30-year averages are the standard reference for typical weather conditions.
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
