Onslow County Climate
Onslow County, North Carolina
Avg Annual Temp
61.9°F
Annual Precip
57.8"
Annual Snowfall
0.6"
Extreme Heat Days
51.5
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991-2020.
Climate normals are 30-year averages of weather variables computed from 1991 to 2020. Station data is aggregated to county level using spatial averaging. Data is informational only — not a substitute for official National Weather Service forecasts or emergency weather warnings.