Marco Island endures about 35 more days above 90 °F each year.
Key West sees rain or snow on roughly 30 fewer days each year.
The year at a glance
Averages from 30 years of climate history, 1991-2020
| Key West | Metric | Marco Island |
|---|---|---|
| 246 days | Sunny daysclear or partly cloudy skies | 232 days |
| 31 in | Precipitationper year | 42 in |
| 109 days | Wet daysrain or snow per year | 139 days |
| 0 in | Snowfallper year | 0 in |
| 55 days | Hot daysabove 90 °F | 90 days |
| 0 days | Freezing nightsat or below 32 °F | 0 days |
| 77% | Humidityaverage relative | 76% |
| 78 °F | Average temperatureyear round | 75 °F |
Monthly temperatures
Average daily high and low for each month, in °F. The gap between the two lines is what an ordinary day feels like across the year.
Daily highs
Daily lows
View monthly temperatures as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Key West high | 75 | 77 | 79 | 83 | 86 | 88 | 90 | 90 | 89 | 85 | 81 | 77 |
| Marco Island high | 74 | 76 | 79 | 83 | 87 | 90 | 91 | 92 | 90 | 87 | 80 | 77 |
| Key West low | 64 | 65 | 68 | 72 | 75 | 78 | 79 | 79 | 78 | 76 | 71 | 67 |
| Marco Island low | 55 | 57 | 60 | 65 | 70 | 74 | 76 | 76 | 75 | 71 | 63 | 59 |
Monthly precipitation
Total rain plus melted snow for each month, in inches. Taller bars mean wetter months.
View monthly precipitation as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Key West | 1.5 | 1.2 | 1.0 | 1.5 | 2.6 | 4.1 | 2.5 | 4.1 | 5.4 | 4.6 | 1.5 | 1.2 |
| Marco Island | 1.5 | 1.2 | 1.4 | 1.9 | 3.3 | 7.1 | 6.3 | 6.5 | 6.6 | 3.2 | 1.3 | 1.1 |
Monthly sunny days
Days each month with clear or partly cloudy skies, so compare the same month between cities.
View monthly sunny days as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Key West | 22 | 23 | 26 | 25 | 24 | 16 | 16 | 16 | 14 | 19 | 23 | 23 |
| Marco Island | 22 | 22 | 24 | 24 | 23 | 15 | 14 | 12 | 13 | 20 | 22 | 22 |
Keep comparing
Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.
Key West vs another city
- Key West vs Marathon, FL
- Key West vs Islamorada, Village of Islands, FL
- Key West vs Key Largo, FL
- Key West vs Florida City, FL
- Key West vs Homestead, FL
- Key West vs New York, NY
- Key West vs Los Angeles, CA
- Key West vs Chicago, IL
- Key West vs Houston, TX
- Key West vs Phoenix, AZ
- Key West vs Philadelphia, PA
Marco Island vs another city
- Marco Island vs Naples Manor, FL
- Marco Island vs Lely Resort, FL
- Marco Island vs Naples, FL
- Marco Island vs Golden Gate, FL
- Marco Island vs Pelican Bay, FL
- Marco Island vs Orangetree, FL
- Marco Island vs New York, NY
- Marco Island vs Los Angeles, CA
- Marco Island vs Chicago, IL
- Marco Island vs Houston, TX
- Marco Island vs Phoenix, AZ
- Marco Island vs Philadelphia, PA
About this data
Every figure on this page is a 30 year average computed from daily climate history for 1991-2020, using each city's own coordinates. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.
Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).