Herkimer County Climate
Herkimer County, New York
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
42.8°F
Annual Precip
49.9"
Annual Snowfall
155.7"
Extreme Heat Days
2
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5b
Minimum winter temperature range for plant survival
1,894
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Herkimer County
Climate Verdict
Herkimer County has a cool, averaging 42.8°F annually, moderately wet with 49.9 inches of annual precipitation, rare extreme heat with only 2.025 days above 90°F annually, heavy winter snowfall averaging 155.7 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 17.1°F. summers are pleasantly cool with July averaging 66.4°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
Herkimer County is 4.7°F cooler than the New York statewide average of 47.5°F, it is also noticeably wetter, receiving 6.6 inches more precipitation than the state average.
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 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.