Key Largo, FL weather in March
In March, Key Largo sees highs around 83°F and lows around 58°F: warm and often humid, with some rain. Rain falls on about 7 days.
- Normal high
- 83°F
- Normal low
- 58°F
- Wet days
- 7
- 1.9 in total
- Muggy days
- 13
- dew point 65°F+
How March changes from start to finish
| March 1 | March 31 | |
|---|---|---|
| Normal high | 83°F | 84°F |
| Normal low | 57°F | 60°F |
| Chance of a wet day | 22% | 21% |
| Sunrise / sunset | 6:44 am / 6:23 pm | 7:14 am / 7:37 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 am66°Fdew point 61°F
- 9 am73°Fdew point 63°F
- Noon78°Fdew point 62°F
- 3 pm78°Fdew point 62°F
- 6 pm75°Fdew point 63°F
- 9 pm70°Fdew point 63°F
NOAA hourly normals (local standard time) from Homestead AFB (28 mi away); average wind 8 mph; clear or few clouds in 53% of daytime hours, mostly cloudy or overcast in 29%.
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 mph17 of 31
- Hot dayshigh 90°F or more3 of 31
- Muggy daysdaily mean dew point 65°F or more13 of 31
- Wet daysat least 0.01 in of rain or melted snow7 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 1.9 in; a dry March brings about 1.1 in and a wet one about 2.5 in (25th and 75th percentiles). About 1 day brings half an inch or more, and about 1 an inch or more.
How March varies from year to year
- Warmest March, 1991-20201997: average high 90°F
- Coolest March1992: average high 77°F
- Wettest March2003: 6.5 in
- Driest March2004: 0.1 in
- Highest reading101°F (March 16, 2008)
- Lowest reading33°F (March 3, 2009)
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 | 81°F | 83°F | 86°F |
| Normal low | 57°F | 58°F | 62°F |
| Wet days | 6 | 7 | 6 |
| Comfortable days | 7 | 7 | 1 |
| Daylight | 11.3 h | 12.0 h | 12.8 h |
Highs change by +2°F from February and +3°F into April.
Nearby alternatives in March
- Cooler: Port St. Lucie, FL153 mi · high 77°F · 7 wet days
How Key Largo ranks in March
- Normal high1st warmest of 378 cities; 1st of 23 in Florida
- Wet days91st driest of 378
- Comfortable days203rd most of 339
What to pack for Key Largo in March
- Layers – afternoons near 83°F but nights near 58°F
- A swimsuit – about 17 beach days
Heating and cooling
March has 17 heating degree days and 193 cooling degree days (base 65°F), 5% of the year's total heating and cooling demand.
Questions
How hot is Key Largo in March?
The normal high is 83°F and the normal low is 58°F. From 1991 to 2020 the hottest March reading was 101°F (March 16, 2008).
Does it rain a lot in Key Largo in March?
About 7 days in March have at least 0.01 in of precipitation, and the normal total is 1.9 in. The wettest March in 1991-2020 was in 2003 (6.6 in); the driest was in 2004 (0.2 in).
Is March a good time to visit Key Largo?
March ranks 3rd of 12 months on our comfort score for Key Largo (56 out of 100). It has about 7 comfortable days and about 3 days at 90°F or hotter. The best months are January, February and March.
Where the numbers come from
- Temperature, rain and snow depth: Royal Palm RS (USC00087760), 23 mi NNW of the city center, 7 ft . NOAA normals and daily records, 1991-2020.
- Snowfall and frost dates: Tavernier (USC00088841), 7.2 mi SW of the city center, 7 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour and cloud cover: Homestead AFB (USW00012826), 28 mi N of the city center, 16 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Homestead AFB Airport (722026-12826), 28 mi N of the city center, 5 ft . Hourly observations, 1991-2020.