Herkimer County Climate
Herkimer County, New York
Avg Annual Temp
42.8°F
Annual Precip
49.9"
Annual Snowfall
155.7"
Extreme Heat Days
2.025
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About Herkimer County Weather
A National Leader in Snowfall
Herkimer's climate is defined by an incredible 155.7 inches of annual snowfall, far exceeding national averages. Its 42.8°F annual temperature reflects a cool, continental environment with long-lasting winters.
A Peak for State Snow Totals
Herkimer is much colder than the 47.4°F state average and is one of the snowiest counties in New York. Its 155.7 inches of snow is more than triple what many southern state counties receive.
Dominating the Snow Belt
Herkimer receives significantly more snow than neighbors Hamilton (115.2") and Jefferson (116.4"). Its 42.8°F average temperature sits in the middle of these northern neighbors.
Mild Summers vs Intense Winters
Winters are long and snowy, averaging 19.9°F from December to February. July is pleasant and mild at 66.4°F, with only 2 days of extreme heat reaching 90°F per year.
Prepare for Heavy Snow Loads
Ensure your roof is rated for heavy snow loads to handle the 155.7 inches of annual accumulation. A reliable 4WD vehicle and professional-grade snow removal gear are daily essentials in winter.
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.