Knox County Climate
Knox County, Maine
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
46.0°F
Annual Precip
51.9"
Annual Snowfall
60.9"
Extreme Heat Days
1
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
6a
Minimum winter temperature range for plant survival
1,877
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Knox County
Climate Verdict
Knox County has a cool, averaging 46.0°F annually, moderately wet with 51.9 inches of annual precipitation, rare extreme heat with only 0.8 days above 90°F annually, heavy winter snowfall averaging 60.9 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 23.8°F. summers are pleasantly cool with July averaging 66.7°F. The 43°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Winter sports enthusiasts benefit from reliable snow cover for 3-4 months annually.
Regional Context
Knox County closely matches the Maine statewide average temperature of 43.8°F, it is somewhat wetter than average for Maine.
Climate Profile
About Knox County Weather
Temperate maritime climate on the coast
Knox's 46.0°F annual average is well above the Maine average but remains cooler than the national median. The ocean keeps the air stable and prevents extreme temperature peaks.
Moderate temperatures by Maine standards
At 46.0°F, Knox is warmer than the state average of 43.8°F. It ranks among the warmer coastal counties, benefiting from the Atlantic's thermal mass.
Less snow than the inland interior
Knox receives 60.9 inches of snow, which is notably less than the 78.3 inches in neighboring Androscoggin. Its 46.0°F average keeps it in line with other coastal peers like Lincoln.
Very few hot days and steady winters
The county records only 1 day of extreme heat per year on average. Winters are relatively mild for Maine, with a December-February average of 26.5°F.
Plan for moisture over extreme heat
With 51.9 inches of annual precipitation and only 1 extreme heat day, dehumidification is more important than air conditioning. Durable winter tires are still needed for the 60.9 inches of snow.
Frequently Asked Questions
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Data sources: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020. Forecast and alert data from National Weather Service API. Air quality data from Open-Meteo.
Climate normals are 30-year averages of weather variables. Station data is aggregated to county level. Forecasts and alerts are fetched live and may change frequently. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.