Key West, FL weather in March
In March, Key West sees highs around 80°F and lows around 69°F: warm, often humid and mostly dry. Expect about 5 wet days.
- Normal high
- 80°F
- Normal low
- 69°F
- Wet days
- 5
- 1.5 in total
- Muggy days
- 16
- dew point 65°F+
How March changes from start to finish
| March 1 | March 31 | |
|---|---|---|
| Normal high | 79°F | 81°F |
| Normal low | 68°F | 71°F |
| Chance of a wet day | 16% | 15% |
| Sunrise / sunset | 6:49 am / 6:29 pm | 7:19 am / 7:42 pm |
| Daylight | 11.7 h | 12.4 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical March day
- 6 am71°Fdew point 64°F
- 9 am74°Fdew point 65°F
- Noon77°Fdew point 65°F
- 3 pm77°Fdew point 65°F
- 6 pm75°Fdew point 64°F
- 9 pm73°Fdew point 64°F
NOAA hourly normals (local standard time) from Key West Intl Airport (2 mi away); average wind 11 mph; clear or few clouds in 72% of daytime hours, mostly cloudy or overcast in 18%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F7 of 31
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph13 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more16 of 31
- Wet daysat least 0.01 in of rain or melted snow5 of 31
- Notable rainat least 0.10 in3 of 31
- Freezing nightslow 32°F or below0 of 31
Average days per March, counted from daily records for each year 1991-2020.
Rain in March
Normal precipitation is 1.5 in; a dry March brings about 0.7 in and a wet one about 2.1 in (25th and 75th percentiles). About 1 day brings half an inch or more.
How March varies from year to year
- Warmest March, 1991-20202003: average high 83°F
- Coolest March2010: average high 73°F
- Wettest March2014: 3.8 in
- Driest March2020: 0.02 in
- Highest reading88°F (March 28, 1994)
- Lowest reading53°F (March 5, 2010)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
March compared with February and April
| February | March | April | |
|---|---|---|---|
| Normal high | 77°F | 80°F | 83°F |
| Normal low | 67°F | 69°F | 73°F |
| Wet days | 5 | 5 | 5 |
| Comfortable days | 7 | 7 | 3 |
| Daylight | 11.3 h | 12.0 h | 12.7 h |
Highs change by +3°F from February and +3°F into April.
How Key West ranks in March
- Normal high15th warmest of 378 cities; 5th of 23 in Florida
- Wet days33rd driest of 378
- Comfortable days196th most of 339
What to pack for Key West in March
- A swimsuit – about 13 beach days
Heating and cooling
March has 4 heating degree days and 297 cooling degree days (base 65°F), 6% of the year's total heating and cooling demand.
Questions
How hot is Key West in March?
The normal high is 80°F and the normal low is 69°F. From 1991 to 2020 the hottest March reading was 88°F (most recently on March 28, 1994).
Does it rain a lot in Key West in March?
About 5 days in March have at least 0.01 in of precipitation, and the normal total is 1.5 in. The wettest March in 1991-2020 was in 2014 (3.8 in); the driest was in 2020 (0.02 in).
Is March a good time to visit Key West?
March ranks 2nd of 12 months on our comfort score for Key West (59 out of 100). It has about 7 comfortable days. The best months are January, February and March.
Where the numbers come from
- Temperature, rain, frost dates, humidity and wind by hour and cloud cover: Key West Intl Airport (USW00012836), 1.9 mi E of the city center, 4 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Key West International Airport (722010-12836), 1.7 mi E of the city center, 1 ft . Hourly observations, 1991-2020.
- Not available for this location: snowfall and snow depth (no station close enough or similar enough in elevation).