Hamilton County Climate
Hamilton County, New York
Avg 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
Seasonal Overview
National Comparison
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 source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.