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Weather & Climate in Cudjoe Key, FL
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Cudjoe Key has a warm climate with an average annual temperature of 78°F (25°C). Winters average 69°F in January while summers reach 85°F in July / relatively mild seasonal variation. The area gets 330 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 46.1 inches (wetter than the 38-inch national average). Air quality is rated Good with a median AQI of 41. The city sits at an elevation of 2 feet.
Temperature
69°F Jan (21°C)
85°F Jul (29°C)
| Annual Average | 77.6°F |
| 44% above US avg | |
| January Average | 69°F (21°C) |
| July Average | 85°F (29°C) |
| Sunny Days | 330 days/yr |
Geography
| Elevation | 2 ft (1 m) |
| Area | 10.5 sq mi (27.1 km²) |
| Population Density | 479/sq mi |
| Coordinates | 24.6788°N, 81.4997°W |
| Timezone | America/New_York |
| County | Monroe County County |
| Nearest Airport | Key West International (EYW) 18 miles away |
Precipitation & Snow
Air Quality
| AQI Median | 41.0 |
| Rating | Good |
Natural Hazard Risk
| Overall Risk | Relatively Moderate |
| Risk Score | 91.6 / 100 |
| Social Vulnerability | 53.9 / 100 |
| Community Resilience | 29.4 / 100 |
Hazard Breakdown
| Tornado | Very Low |
| Hurricane | Relatively High |
| Earthquake | Very Low |
| Wildfire | Very Low |
| Flood | Relatively Low |
| Hail | Very Low |
| Strong Wind | Relatively Low |
| Heat Wave | Relatively Low |
| Winter Weather | No Rating |
| Lightning | Relatively High |
| Drought | No Rating |
| Cold Wave | Very Low |
| Landslide | Very Low |
| Coastal Flood | Very High |
Source: FEMA National Risk Index v1.20 (Dec 2025)
Hurricane History
20 hurricanes (Category 1+) recorded within 500 km since 1980. Strongest on record: Category 5.
| Year | Name | Category | Max Wind | Closest |
| 2024 | Rafael | Category 3 | 115 mph | 246 km |
| 2022 | Ian | Category 5 | 161 mph | 142 km |
| 2021 | Elsa | Category 1 | 75 mph | 273 km |
| 2020 | Eta | Category 1 | 75 mph | 272 km |
| 2017 | Irma | Category 4 | 132 mph | 2 km |
| 2008 | Gustav | Category 4 | 155 mph | 300 km |
| 2008 | Ike | Category 1 | 81 mph | 270 km |
| 2005 | Dennis | Category 4 | 138 mph | 175 km |
| 2005 | Katrina | Category 3 | 109 mph | 61 km |
| 2005 | Wilma | Category 3 | 127 mph | 130 km |
| 2005 | Rita | Category 3 | 127 mph | 87 km |
| 2004 | Charley | Category 4 | 150 mph | 134 km |
| 2001 | Michelle | Category 4 | 132 mph | 254 km |
| 1999 | Irene | Category 1 | 81 mph | 13 km |
| 1998 | Georges | Category 2 | 104 mph | 36 km |
| 1996 | Lili | Category 2 | 98 mph | 253 km |
| 1992 | Andrew | Category 5 | 167 mph | 107 km |
| 1987 | Floyd | Category 1 | 75 mph | 2 km |
| 1985 | Kate | Category 2 | 104 mph | 169 km |
| 1982 | Alberto | Category 1 | 86 mph | 192 km |
Source: NOAA IBTrACS (Category 1+, 1980-2026).
Tornado History
62 tornadoes (EF0+) recorded within 100 km since 1950. Strongest on record: EF2. Total: 51 injuries.
| Date | Rating | Distance | Path | Fatalities |
| Aug 26, 2005 | EF2 | 43 km | 1.2 mi | 0 |
| Apr 27, 1980 | EF2 | 8 km | 0.5 mi | 0 |
| Jun 18, 1972 | EF2 | 19 km | 1.0 mi | 0 |
| Jun 18, 1972 | EF2 | 33 km | 1.5 mi | 0 |
| Jun 2, 1966 | EF2 | 32 km | 0.1 mi | 0 |
| Oct 8, 2024 | EF1 | 34 km | 0.3 mi | 0 |
| Sep 10, 2008 | EF1 | 80 km | 0.5 mi | 0 |
| Oct 15, 1999 | EF1 | 76 km | 1.0 mi | 0 |
| Nov 4, 1998 | EF1 | 92 km | 2.0 mi | 0 |
| Feb 2, 1998 | EF1 | 43 km | 1.0 mi | 0 |
| May 22, 1997 | EF1 | 98 km | 0.3 mi | 0 |
| Jun 20, 1983 | EF1 | 8 km | 3.0 mi | 0 |
| Jun 3, 1982 | EF1 | 31 km | 0.3 mi | 0 |
| Sep 9, 1972 | EF1 | 18 km | 0.5 mi | 0 |
| Jun 18, 1972 | EF1 | 65 km | 2.0 mi | 0 |
| May 24, 1970 | EF1 | 12 km | 0.1 mi | 0 |
| Sep 8, 1965 | EF1 | 41 km | 0.1 mi | 0 |
| Mar 14, 1964 | EF1 | 15 km | 0.1 mi | 0 |
| Jun 6, 1963 | EF1 | 32 km | 0.1 mi | 0 |
| Jul 17, 1957 | EF1 | 26 km | 0.1 mi | 0 |
Source: NOAA Storm Prediction Center (EF0+, 1950-2024, US only).
Wildfire History
20 wildfires (100+ acres) recorded within 100 km. Largest: FY 18 COASTAL PRAIRIES (18,844 acres, 2018).
| Year | Name | Acres Burned | Distance |
| 2018 | FY 18 COASTAL PRAIRIES | 18,844 | 98 km |
| 2021 | CP3 | 8,143 | 75 km |
| 2011 | CAPE SABLE RX | 7,311 | 76 km |
| 2009 | HELLS BAY | 5,489 | 87 km |
| 2024 | EVER CP3 EXOTICS RX | 5,485 | 87 km |
| 2008 | CAPE SABLE RX | 5,335 | 75 km |
| 2005 | LYGODIUM LAKE | 5,211 | 98 km |
| 2004 | CANEPATCH 2 | 3,351 | 100 km |
| 2022 | EVP ROADSIDE EAST | 3,188 | 95 km |
| 2012 | UNNAMED | 3,128 | 87 km |
| 2012 | UNNAMED | 3,090 | 100 km |
| 2009 | HARNEY RIVER RX 2 | 2,886 | 93 km |
| 2009 | UNNAMED | 2,746 | 98 km |
| 2002 | HARNEYRVR | 2,641 | 93 km |
| 2008 | BROAD RIVER RX 3 | 1,762 | 99 km |
| 2005 | HARNEY RIVER | 1,115 | 92 km |
| 2011 | HARNEY RX | 1,088 | 92 km |
| 1986 | NINE MILE | 1,061 | 97 km |
| 2001 | HARNEYS2 | 834 | 92 km |
| 2004 | WESTLAKE 2 | 832 | 97 km |
Source: NIFC/IRWIN Wildfire Records (100+ acres).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 69°F (21°C) | 2.2 in | Coldest |
| February | 70°F (21°C) | 1.7 in | Driest |
| March | 73°F (23°C) | 1.8 in | |
| April | 76°F (24°C) | 1.9 in | |
| May | 79°F (26°C) | 4.2 in | |
| June | 82°F (28°C) | 6.3 in | Wettest |
| July | 85°F (29°C) | 3.9 in | Warmest |
| August | 84°F (29°C) | 5.9 in | |
| September | 83°F (28°C) | 6.3 in | |
| October | 80°F (26°C) | 4.6 in | |
| November | 75°F (24°C) | 2.1 in | |
| December | 71°F (22°C) | 1.9 in |
Cudjoe Key has a seasonal temperature swing of 15°F / from 69°F in January to 85°F in July. Total annual precipitation is 42.7 inches, with June being the wettest month (6.3") and February the driest (1.7").