Hamilton County Climate
Hamilton County, New York
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
41.0°F
Annual Precip
49.1"
Annual Snowfall
115.2"
Extreme Heat Days
0
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
4b
Minimum winter temperature range for plant survival
1,541
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Hamilton County
Climate Verdict
Hamilton County has a cool, averaging 41.0°F annually, moderately wet with 49.1 inches of annual precipitation, heavy winter snowfall averaging 115.2 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 15.6°F. summers are pleasantly cool with July averaging 64.3°F. The 49°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
Hamilton County is 6.5°F cooler than the New York statewide average of 47.5°F, it is also noticeably wetter, receiving 5.8 inches more precipitation than the state average.
Climate Profile
About Hamilton County Weather
The Coldest Heart of the Adirondacks
Hamilton is one of the coldest spots in the nation with a 41.0°F annual average temperature. Its climate is characterized by deep winters and remarkably cool summers that never reach extreme heat levels.
Coldest County in New York
At 41.0°F, Hamilton is significantly colder than the state average of 47.4°F. It represents the peak of New York's alpine climate, seeing 115.2 inches of annual snowfall.
Extreme Weather even for the North
Hamilton is colder than all its immediate neighbors, including Franklin (41.3°F) and Herkimer (42.8°F). It receives more snow than Franklin (98.1") but less than the lake-effect-heavy Herkimer (155.7").
Severe Winters and Cool Summers
Winters average a frigid 18.4°F with over 115 inches of snow. Summers are the coolest in the region, with a July average of 64.3°F and zero days recorded at or above 90°F.
Focus on Heating and Power
Prioritize high-efficiency heating and backup generators for the long, snowy winter months. Traditional air conditioning is unnecessary since the county virtually never sees temperatures in the 90s.
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.