Suffolk County Climate
Suffolk County, New York
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
52.6°F
Annual Precip
45.2"
Annual Snowfall
29.3"
Extreme Heat Days
8
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
7b
Minimum winter temperature range for plant survival
3,094
Supports most vegetables & fruits
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Suffolk County
Climate Verdict
Suffolk County has a mild, with an average annual temperature of 52.6°F, moderately wet with 45.2 inches of annual precipitation, rare extreme heat with only 8.499999999999998 days above 90°F annually, moderate snowfall of 29.3 inches annually. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are cold, with January averaging 31.8°F. summers are warm — July averages 74.0°F. The 42°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Suffolk County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Suffolk County is 5.1°F warmer than the New York statewide average of 47.5°F.
Climate Profile
About Suffolk County Weather
A Mild Coastal Outlook in Suffolk
Suffolk County averages 52.6°F annually, placing it very close to the national median temperature for a temperate maritime climate. Its coastal position helps moderate the air compared to the harsher extremes seen in the American interior.
Warmest Among New York Counties
With an annual average of 52.6°F, Suffolk is significantly warmer than the New York state average of 47.4°F. This reflects the island's unique position as one of the state's most temperate regions.
Maritime Influence Dampens Regional Extremes
While neighboring inland counties face sharper temperature drops, Suffolk maintains a steadier profile with 45.2 inches of annual precipitation. This is slightly wetter than the state average of 43.3 inches due to frequent Atlantic storm tracks.
Milder Winters and Humid Summers
Winter brings a manageable 29.3 inches of snow, far below the upstate norm, with January averages staying at 31.8°F. Summers are warm but rarely scorching, averaging 8 days per year where temperatures hit or exceed 90°F.
Prepare for Salt and Humidity
Residents should invest in dehumidification systems to manage the 74.0°F July humidity. Additionally, coastal homeowners need to plan for high-moisture weather events given the 45.2 inches of annual rainfall.
Frequently Asked Questions
What is the average temperature in Suffolk County?
How much rain does Suffolk County get?
Does it snow in Suffolk County?
How hot does Suffolk County get in summer?
How cold are winters in Suffolk County?
Track your own weather in Suffolk County
Ambient Weather personal weather stations give you hyperlocal climate data.
Sponsored
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.