Belknap County Climate
Belknap County, New Hampshire
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
46.7°F
Annual Precip
46.5"
Annual Snowfall
70.8"
Extreme Heat Days
7
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5b
Minimum winter temperature range for plant survival
2,438
Favors cool-season crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Belknap County
Climate Verdict
Belknap County has a cool, averaging 46.7°F annually, moderately wet with 46.5 inches of annual precipitation, rare extreme heat with only 6.7 days above 90°F annually, heavy winter snowfall averaging 70.8 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 21.1°F. summers are warm — July averages 70.9°F. The 50°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
Belknap County closely matches the New Hampshire statewide average temperature of 45.4°F.
Climate Profile
About Belknap County Weather
A Classic Cold Continental Climate
Belknap County averages 46.7°F annually, falling significantly below the national median temperature. This humid continental climate experiences sharp seasonal swings typical of the New England interior.
Warmer Than the State Average
The county's annual average temperature of 46.7°F sits slightly higher than the New Hampshire state average of 45.4°F. It represents a transition zone between the warmer southern valleys and the cooler northern mountains.
Matching the Regional Precipitation Profile
Belknap receives 46.5 inches of annual precipitation, which is virtually identical to neighboring Cheshire County. However, it stays slightly warmer on average than Carroll County to its immediate north.
Consistent Snow and Moderate Heat
Winter brings 70.8 inches of annual snowfall and January averages of 21.1°F. Summers remain mild with a 68.6°F average, though residents still face about 7 days of extreme heat over 90°F each year.
Prepare for Ice and Humidity
Reliable heating systems are essential to handle the 24.1°F winter average. Residents should also invest in dehumidification and cooling for the July peak, when temperatures average 70.9°F.
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.