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St. Johns County Climate

St. Johns County, Florida

JanFebMarAprMayJunJulAugSepOctNovDec70.5°AVG °F

Avg Annual Temp

70.5°F

Annual Precip

53.5"

Annual Snowfall

0.0"

Extreme Heat Days

68.85

days >= 90°F/yr

Monthly Temperature

54.4°F avgJFMAMJJASOND

Precipitation Calendar

Dry
Wet❄= snowfall
2.9"
2.8"
3.4"
2.9"
4.0"
6.9"
5.7"
7.3"
7.8"
4.5"
2.4"
3.0"
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Seasonal Overview

Comfort ZoneSpring64°75°10.3"Summer80°82°19.8"Fall65°80°14.7"Winter57°59°8.7"20°40°60°80°100°

National Comparison

Warmer than 92% of US counties
Wetter than 80% of US counties
More seasonal variation than 3% of US counties

Climate Profile

About St. Johns County Weather

Temperate Coastal Subtropical

St. Johns County averages 70.5°F, staying much warmer than the national median while avoiding the extreme heat of the south. The Atlantic Ocean helps moderate the local climate.

Slightly Below State Average

The county's 70.5°F average is slightly cooler than the Florida state average of 71.1°F. This makes it one of the more temperate options for residents in the Sunshine State.

Cooler Than the South

St. Johns records only 69 extreme heat days, far fewer than Sarasota's 131. It is very similar to Putnam County in temperature but benefits from more consistent ocean breezes.

Gentle Winters and Warm Summers

Winter temperatures average 58.6°F, and summer averages sit at a manageable 81.2°F. Snow is never a factor, and extreme heat days are relatively limited to 69 per year.

Coastal Planning for Rain

With 53.5 inches of annual rain, drainage and moisture protection are key for property owners. Keep a light jacket handy for January, when the average temperature drops to 56.9°F.

Frequently Asked Questions

What is the average temperature in St. Johns County?
The average annual temperature in St. Johns County, FL is 70.5°F, based on NOAA 30-year climate normals (1991-2020).
How much rain does St. Johns County get?
St. Johns County receives an average of 53.5 inches of precipitation per year, including both rain and meltwater from snow. This is based on NOAA 30-year climate normals.
Does it snow in St. Johns County?
St. Johns County receives little to no measurable snowfall in a typical year, based on NOAA 30-year climate normals.
How hot does St. Johns County get in summer?
The average summer temperature (June-August) in St. Johns County is 81.2°F. The county experiences an average of 68.85 days per year above 90°F.
How cold are winters in St. Johns County?
The average winter temperature (December-February) in St. Johns County is 58.6°F. January, typically the coldest month, averages 56.9°F.

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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.

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