Onslow County Climate
Onslow County, North Carolina
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
61.9°F
Annual Precip
57.8"
Annual Snowfall
0.6"
Extreme Heat Days
52
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
8b
Minimum winter temperature range for plant survival
5,117
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Onslow County
Climate Verdict
Onslow County has a warm, averaging 61.9°F year-round, very wet conditions receiving 57.8 inches of precipitation annually, occasional hot days — 51.5 per year above 90°F, light snow averaging 0.6 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 44.0°F. summers are warm — July averages 79.4°F. The 35°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
The moderate temperatures support hiking, cycling, and camping comfortably in spring, summer, and fall.
Regional Context
Onslow County closely matches the North Carolina statewide average temperature of 59.3°F, it is also noticeably wetter, receiving 6.2 inches more precipitation than the state average.
Climate Profile
About Onslow County Weather
Onslow County’s Warm Maritime Environment
Onslow's 61.9°F average temperature puts it well above the national median for comfort. The county enjoys a maritime climate with moderated but humid conditions.
Exceeding North Carolina’s Temperature Baseline
At 61.9°F, Onslow is significantly warmer than the state average of 59.3°F. It ranks as one of the state's prime coastal climate zones.
Drier but Similar Temperature to New Hanover
Onslow averages 57.8 inches of rain, which is high but still less than New Hanover's 62.9 inches. Both counties experience 52 days of extreme heat per year.
Rainy Summers and Mild Coastal Winters
Onslow receives 57.8 inches of annual precipitation, largely during the hot summer months. Snow is a rarity, averaging only 0.6 inches while January stays mild at 44.0°F.
Invest in High-Volume Storm Drainage
With nearly 58 inches of rain, gutter maintenance and drainage are top priorities for homeowners. Prepare for 52 days of 90-degree weather with efficient home cooling.
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.