Key West Weather in March
March is one of the perfect months to visit Key West, with daytime temperatures of 26°C (79°F) and lows of 20°C (68°F) at night. It is also the driest month of the year.
Rainfall in Key West in March
The month is known for having the least rain of the year. Make the most of the sunshine and clear skies. Past climate data indicates that roughly 7 days will see rain, totalling around 27 mm (1.1 in) for the month. Neither particularly heavy nor particularly frequent, the rain this month is about average. A light jacket should be enough on most wet days.
Temperature in Key West in March
March is one of the better months to visit Key West. Expect 26°C (79°F) during the day and 20°C (68°F) at night. Overall, the month follows a fairly predictable daily temperature pattern. At 20°C (68°F) overnight, nights are warm enough to sit outside comfortably in light clothing.
Sunshine in Key West in March
Expect a lot of sunshine this month, with about 310 hours of sun. These sunny conditions add to the overall experience.
Average water temperature in March
With water at 23°C (73°F), you can expect warm, pleasant conditions for any water activity. There's no adjustment period — it feels comfortable straight away.If your ideal day consists of dry skies and pleasant temperatures, January, February, March, April, November and December typically offer the best circumstances for Key West.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Key West's climate page.
Key West Temperature in March
Min Temperature
20°C (68°F)
Max Temperature
26°C (79°F)
Water Temperature
23°C (73°F)
Chance of Rain
24%
Precipitation
27 mm (1.1 in)
Rainy days
7 days
Humidity
73%
Sunshine
310 hours
Percentage Sunshine
83%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Key West typically stay consistent throughout March, with daily highs averaging around 26°C (79°F). Nights are warm, with lows typically ranging from 20°C (68°F) to 23°C (73°F).
Average temperatures in March
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in March
Historical weather for Key West in March
Browse day-by-day weather records for Key West spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Key West historical weather extremes in March
Based on 50 years of weather observations in Key West between 1976 and 2026, these are the recorded extremes.
- The hottest March day on record in Key West reached 31°C (88°F) (March 28, 1994).
- The coldest March day was on March 3, 1980, with a maximum of 14°C (57°F).
- The coldest night in March in Key West was on March 3, 1986, with a minimum of 9°C (48°F).
Best Places in the United States of America in March
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in March →
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What to Wear in Key West in March
Warm weather calls for comfortable, breathable clothing in March. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). Some rain is possible, so pack something to handle light showers. With water temperatures around 23°C (73°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Key West in March
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our Key West's climate page.
Temperature Rainfall Sunshine Humidity Water Temp
See the full Key West climate overview or explore weather in the United States of America.
