Key West or Miami in March?
On climate data, Key West comes out ahead overall in March. See the per-criterion details below.
Key WestPhoto: Ebyabe · CC BY-SA 3.0
MiamiPhoto: Robbschultz69 · CC BY-SA 4.0Key figures in March
| Criterion | Key West | Miami |
|---|---|---|
| Average daily high | 24 °C | 25 °C |
| Average daily low | 23 °C | 21 °C |
| Sea | 24 °C | 25 °C ★ |
| Rainy days | 6 rainy days (est.) ★ | 9 rainy days (est.) |
| Sun | 7 h/day | 7 h/day |
| Humidity | 77 % | 73 % |
Winner by travel type
Trade-offs
- Key West is drier, with about 3 fewer rainy days.
- The sea at Miami is about 1 °C warmer.
Key West or Miami in March: the short answer
In March, Key West comes out ahead on the overall climate score (Key West 91/100 vs Miami 87/100). That is a snapshot of one month, though — which one truly fits depends on what you want from the trip, so the breakdown below goes criterion by criterion.
This comparison focuses on March as a representative month for the pair; for any other month, use each destination's month-by-month pages. Across the whole year Key West averages a climate score of 74/100, Miami 72/100. Both profiles below are historical monthly averages, not a forecast.
Weather in March, side by side
The average daily high is about 24 °C in Key West and 25 °C in Miami — warmer in Miami. Average daily lows are around 23 °C versus 21 °C.
On rain, Key West sees about 6 rainy days in March and Miami about 9 — drier in Key West. Sunshine is comparable (7 vs 7 hours a day).
Sea temperature and swimming
In March the water is about 24 °C at Key West and 25 °C at Miami — warmer for swimming at Miami. Over the year, Key West is comfortable for swimming (from ~21 °C) in January, February, March, April, May, June, July, August, September, October, November and December, Miami in January, February, March, April, May, June, July, August, September, October, November and December. Peak sea warmth is August for Key West and August for Miami.
Rain and sun across the year
Over a full year Key West records roughly 174 rainy days and Miami about 197 — the drier of the two overall is Key West. At their sunniest, Key West reaches about 9 hours of sun a day (May) and Miami about 8 (May). If dependable dry, sunny weather is your top priority, weigh these annual totals alongside the single month above.
Best time to visit each
Climatically, Key West is at its best in February, March, April and December, while Miami peaks in February, March, April and December. If your dates are fixed, pick the destination whose strong season overlaps them; if you are flexible, plan around these windows.
Which suits which kind of trip
Based on the March scores for each travel style:
Beach & swimming: Key West scores higher in March (Key West 92 vs Miami 89).
City breaks: Key West scores higher in March (Key West 96 vs Miami 89).
Active & hiking: Key West scores higher in March (Key West 83 vs Miami 76).
Family: Key West scores higher in March (Key West 92 vs Miami 90).
Verdict: which should you pick?
In March, Key West leads across every scored category here — the overall score and each travel type — so on the climate data it is the clearer pick this month. Over the year, Key West carries the higher overall climate score. Your own priority (sun, sea, low rain or sightseeing comfort) still matters, and the month-by-month pages for each destination give you the full picture before you book.