Chittenden County Climate
Chittenden County, Vermont
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
47.0°F
Annual Precip
39.9"
Annual Snowfall
86.7"
Extreme Heat Days
8
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
5a
Minimum winter temperature range for plant survival
2,638
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Chittenden County
Climate Verdict
Chittenden County has a cool, averaging 47.0°F annually, moderate rainfall of 39.9 inches per year, rare extreme heat with only 8.05 days above 90°F annually, heavy winter snowfall averaging 86.7 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are very cold — January averages 20.0°F. summers are warm — July averages 71.7°F. Residents experience a substantial 52°F difference between winter and summer.
Outdoor & Gardening Guidance
Winter sports enthusiasts benefit from reliable snow cover for 3-4 months annually.
Regional Context
Chittenden County is 3.4°F warmer than the Vermont statewide average of 43.6°F, it is somewhat drier than average for Vermont.
Climate Profile
About Chittenden County Weather
Vermont’s Warmest Urban Center
Chittenden County averages 47.0°F, which is cool compared to the national median but leads the state in warmth. Its proximity to Lake Champlain helps moderate the extreme cold.
Top Ranked for Heat
Chittenden is the warmest county in Vermont, sitting 3.4 degrees above the state average of 43.6°F. It experiences more heat days than any of its neighboring counties.
Leading the Champlain Valley
At 47.0°F, it is noticeably warmer than Addison County’s 44.0°F. It also receives less snow than the mountainous regions to the east, like Lamoille.
Warmer Summers and Moderate Snow
The county sees 8 days of 90-degree heat, the highest in the state, with July averages reaching 71.7°F. Annual snowfall totals 86.7 inches, which is moderate for this latitude.
Prepare for Humidity and Snow
Unlike most of Vermont, residents here may want central air conditioning to handle the 8 extreme heat days. Winter prep remains vital as January averages still sit at 20.0°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.