Washington County Climate
Washington County, Mississippi
Avg Annual Temp
64.1°F
Annual Precip
52.5"
Annual Snowfall
0.4"
Extreme Heat Days
83.83333333333334
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
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 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.