Washington County Climate
Washington County, Mississippi
NOAA NCEI 1991-2020 Climate NormalsAvg Annual Temp
64.1°F
Annual Precip
52.5"
Annual Snowfall
0.4"
Extreme Heat Days
84
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Growing Season & Gardening
8b
Minimum winter temperature range for plant survival
5,881
Excellent for heat-loving crops
Seasonal Overview
National Comparison
7-Day Outlook
Forecast
Current Conditions
Air Quality
Safety
Weather Alerts
Climate Advisory: Washington County
Climate Verdict
Washington County has a warm, averaging 64.1°F year-round, moderately wet with 52.5 inches of annual precipitation, significant summer heat with 83.83333333333334 days annually above 90°F, light snow averaging 0.4 inches per year. This climate profile shapes everything from energy costs to outdoor recreation opportunities.
Seasonal Breakdown
Winters are mild, with January temperatures averaging 43.8°F. summers are hot, with July averaging 82.3°F. The 39°F seasonal variation provides noticeable but manageable change.
Outdoor & Gardening Guidance
Summer outdoor activities should be planned for early morning or evening to avoid extreme heat.
Regional Context
Washington County closely matches the Mississippi statewide average temperature of 63.9°F, it is also noticeably drier, receiving 7.0 inches less precipitation than the state average.
Climate Profile
About Washington County Weather
High Heat in the Mississippi Delta
Washington County averages 64.1°F annually, which is about 10 degrees warmer than the national median. The county experiences a humid subtropical climate with a moderate 52.5 inches of annual rainfall.
Typical Mississippi Heat and Humidity
The county’s 64.1°F average temperature closely aligns with the Mississippi state average of 63.9°F. While it matches the state in temperature, it is slightly drier than the state average of 59.6 inches of rain.
Drier than the Piney Woods
Washington County receives 52.5 inches of rain, making it significantly drier than southern counties like Wayne or Walthall. However, it faces more extreme heat, with 10 more 90-degree days than Tunica to the north.
Eighty-Four Days of Extreme Heat
Summer is intense here, with 84 days per year reaching at least 90°F and a July average of 82.3°F. Winters are short and cool, averaging 45.9°F with only 0.4 inches of annual snow.
Prepare for Intense Summer Sun
With 84 extreme heat days, residents must prioritize sun protection and high-performance cooling systems. Agricultural planning should account for the relatively lower 52.5 inches of rain compared to other Mississippi regions.
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.