Simpson County Climate
Simpson County, Mississippi
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
67.5°F
Annual Precip
57.5"
Annual Snowfall
0.7"
Extreme Heat Days
77
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
8b
Minimum winter temperature range for plant survival
6,780
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Simpson County
Climate Verdict
Simpson County has a warm, averaging 67.5°F year-round, very wet conditions receiving 57.5 inches of precipitation annually, significant summer heat with 76.6 days annually above 90°F, light snow averaging 0.7 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 49.5°F. summers are hot, with July averaging 84.1°F. The 35°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Growing season and gardening data is currently limited for Simpson County. Check the USDA Plant Hardiness Zone Map and local extension office for specific guidance.
Regional Context
Simpson County is 3.6°F warmer than the Mississippi statewide average of 63.9°F.
Climate Profile
About Simpson County Weather
Deep South warmth in Simpson County
At 67.5°F, Simpson County's average annual temperature is roughly 12 degrees warmer than the national median. The county experiences the quintessential humid subtropical climate common to the Deep South.
Surpassing state temperature averages
Simpson County is significantly warmer than the average Mississippi county, exceeding the state mean of 63.9°F by over three degrees. It ranks as one of the warmest counties in the entire state.
Warmer than its northern neighbors
Simpson County's 67.5°F average makes it much warmer than Smith County to the east, which averages 62.4°F. This temperature gap creates distinct differences in local energy needs and planting zones.
Hot summers and consistent rain
July brings average highs of 84.1°F, contributing to 77 days of extreme heat annually. Winters are mild at 51.4°F, and the county receives a generous 57.5 inches of precipitation each year.
Outdoor gear for wet heat
Breathable, moisture-wicking clothing is a must for the 77 days of extreme heat and high humidity. Homeowners should ensure proper drainage systems to handle the 57.5 inches of annual rainfall.
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.