St. Johns County, Florida

What hazards hit St. Johns County most?

The most frequent records are severe thunderstorm wind events: 339 since 1964. 44% of its severe thunderstorm wind events since 1964 fell in June and July. The rank column places the county among Florida's counties by days with a record per 1,000 square miles of land over each hazard's complete period.

Source: NOAA NCEI Storm Events Database (county and forecast-zone records attributed to the county; a zone record shows its own totals on each county it covers). Days: dates with at least one record of the hazard in the county. Ranks: days with a record per 1,000 square miles of land (Census Bureau 2024 Gazetteer), since 1950 for tornadoes, 1955 for hail and thunderstorm wind, 1996 for the rest.

How many tornadoes has St. Johns County had?

NOAA records 66 tornadoes in St. Johns County from 1950 to 2025, the strongest rated F3, with 0 deaths and 17 injuries recorded in the county. That is 12th of 67 Florida counties and 63rd of 3,080 U.S. counties by days with tornadoes per 1,000 square miles since 1950. A tornado that crossed a county line is counted in each county it touched, with the length of its path inside the county.

Counted as whole tornadoes rather than county records, the Storm Prediction Center's database holds 68 tornadoes whose track touched St. Johns County since 1950 (NOAA's county records number 66: they file a crossing tornado once per county segment, and the two databases differ on some tracks); along their whole tracks they killed 0 people.

Map of the strongest tornado tracks in Florida.

Source: NOAA NCEI Storm Events Database, tornado records by county (path length in the county, maximum width); ratings as published: F scale before February 1, 2007, EF scale after. Whole-track figures: NOAA Storm Prediction Center tornado database (1950-2025). SPC severe weather database.

When was the last damaging storm in St. Johns County?

The most recent record with damage, injuries or deaths is the June 27, 2026 thunderstorm wind ($1,000 in damage in 2025 dollars).

Source: NOAA NCEI Storm Events Database; every record of 2025-2026 is listed, earlier ones when they caused deaths, injuries or $250,000 of damage (2025 dollars), and every tornado.

The deadliest and costliest records

Source: NOAA NCEI Storm Events Database: deaths and injuries direct and indirect; damage is property plus crops as estimated by the National Weather Service, converted to 2025 dollars.

Is it getting more frequent?

Records per decade for St. Johns County's most frequent hazards. Counts rose everywhere after 1996, when NOAA began recording every event type, so compare decades within a hazard's complete period only (the shaded cells come before it).

Source: NOAA NCEI Storm Events Database, records per calendar decade; zone records from the CZ_TYPE field (Z).

What time of year?

44% of its severe thunderstorm wind events since 1964 fell in June and July. The two busiest months are in violet.

Source: NOAA NCEI Storm Events Database, records by the month they began.

Federal disaster declarations for St. Johns County

FEMA's register lists 34 declarations that include St. Johns County: 21 major disasters, 13 emergencies and 0 fire management assistance declarations. Most were for hurricane (21) and tropical storm (4).

Source: FEMA OpenFEMA Disaster Declarations Summaries (v2), declarations through October 2, 2026; one declaration is counted once however many areas it names. OpenFEMA dataset page.

How many floods has St. Johns County had?

NOAA's Storm Events Database holds 85 flood or flash flood records for St. Johns County from 1996 to 2025, on 71 days, with 0 deaths. By flood insurance claims since 1978 (OpenFEMA, as of September 8, 2026), St. Johns County ranks 65th of 2,942 U.S. counties. The 100 counties with the most claims

The National Flood Insurance Program has paid $252 million on 7,639 claims filed in St. Johns County; the most in one year was 3,456 in 2016. Claims count insured losses only: uninsured flood damage is not in this file.

Source: FEMA OpenFEMA NFIP Redacted Claims, as of September 8, 2026; claims by year of loss, payments in the dollars of the year paid. OpenFEMA dataset page.

FEMA's modeled risk for St. Johns County

FEMA's National Risk Index rates St. Johns County Relatively Moderate overall, with an expected annual loss of $97.0 million. These are FEMA's model estimates of future loss from 18 hazards, not a count of what happened; they can differ from the record above.

Source: FEMA National Risk Index, county table, December 2025 release. FEMA's National Risk Index map.

Counties that share a border with St. Johns County

1. Duval County 1,985
2. St. Johns County 937
3. Flagler County 936
4. Putnam County 730
5. Clay County 664

Source: U.S. Census Bureau county adjacency file; NOAA NCEI Storm Events Database, records since 1950. The Census Bureau's adjacency file.

Next

• Tornadoes in FloridaEvery Florida tornado since 1950 and the counties with the most per square mile
• Severe thunderstorm wind in FloridaThe state's severe thunderstorm wind events, by county, year and month
• The Florida recordEvery hazard in the state, its deadliest events and its federal declarations
• FEMA's risk rating for each hazard in St. Johns CountyThe hazard risk calculator: 18 hazards beside the county's record
• Download St. Johns County's FEMA declarations (CSV)34 rows: every declaration that named the county, for your own analysis