St. Lucie County Climate
St. Lucie County, Florida
Avg Annual Temp
73.3°F
Annual Precip
53.5"
Annual Snowfall
0.0"
Extreme Heat Days
68.5
days >= 90°F/yr
Monthly Temperature
Precipitation Calendar
Seasonal Overview
National Comparison
Climate Profile
About St. Lucie County Weather
Tropical Warmth All Year
St. Lucie County averages 73.3°F, placing it among the warmest regions in the United States. Its proximity to the Atlantic keeps the air humid and the winters very mild.
Above the Florida Average
The county's average temperature of 73.3°F is over two degrees warmer than the state average of 71.1°F. It remains one of the more consistently warm counties in Florida.
Warm Winters Compared to Neighbors
St. Lucie has a winter average of 64.3°F, making it the warmest winter spot in this group. It also enjoys fewer extreme heat days than inland counties like Polk or Seminole.
Stable Temperatures Year-Round
The difference between summer (81.1°F) and winter (64.3°F) is less dramatic than in North Florida. Despite the high average temp, extreme heat over 90°F only occurs on 69 days.
Prepare for Constant Humidity
Outdoor lifestyles thrive here as extreme heat is limited to just 69 days annually. Use dehumidifiers to manage the 53.5 inches of annual rainfall and the persistent coastal moisture.
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.