Key Largo, FL weather in December
Expect warm, often humid weather with some rain in Key Largo in December, with highs near 80°F and lows near 59°F. Rain falls on about 7 days. It is one of the coolest months in Key Largo.
- Normal high
- 80°F
- Normal low
- 59°F
- Wet days
- 7
- 1.9 in total
- Muggy days
- 18
- dew point 65°F+
How December changes from start to finish
| December 1 | December 31 | |
|---|---|---|
| Normal high | 82°F | 78°F |
| Normal low | 61°F | 56°F |
| Chance of a wet day | 24% | 21% |
| Sunrise / sunset | 6:50 am / 5:31 pm | 7:06 am / 5:42 pm |
| Daylight | 10.7 h | 10.6 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 December day
- 6 am65°Fdew point 62°F
- 9 am70°Fdew point 63°F
- Noon76°Fdew point 63°F
- 3 pm76°Fdew point 63°F
- 6 pm71°Fdew point 64°F
- 9 pm68°Fdew point 63°F
NOAA hourly normals (local standard time) from Homestead AFB (28 mi away); average wind 7 mph; clear or few clouds in 52% of daytime hours, mostly cloudy or overcast in 32%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F6 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 more0 of 31
- Muggy daysdaily mean dew point 65°F or more18 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 December, counted from daily records for each year 1991-2020.
Rain in December
Normal precipitation is 1.9 in; a dry December brings about 0.7 in and a wet one about 1.9 in (25th and 75th percentiles). About 1 day brings half an inch or more.
How December varies from year to year
- Warmest December, 1991-20202007: average high 86°F
- Coolest December1991: average high 76°F
- Wettest December2015: 11.3 in
- Driest December2004: no measurable precipitation
- Highest reading95°F (December 3, 2007)
- Lowest reading27°F (December 28, 2010)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
December compared with November and January
| November | December | January | |
|---|---|---|---|
| Normal high | 83°F | 80°F | 78°F |
| Normal low | 64°F | 59°F | 55°F |
| Wet days | 8 | 7 | 7 |
| Comfortable days | 4 | 6 | 9 |
| Daylight | 10.9 h | 10.6 h | 10.8 h |
Highs change by -3°F from November and -2°F into January.
Nearby alternatives in December
- Cooler: Port St. Lucie, FL153 mi · high 74°F · 8 wet days
How Key Largo ranks in December
- Normal high4th warmest of 378 cities; 1st of 23 in Florida
- Wet days97th driest of 378
- Comfortable days115th most of 340
What to pack for Key Largo in December
- A swimsuit – about 17 beach days
Heating and cooling
December has 36 heating degree days and 169 cooling degree days (base 65°F), 5% of the year's total heating and cooling demand.
Questions
How hot is Key Largo in December?
The normal high is 80°F and the normal low is 59°F. From 1991 to 2020 the hottest December reading was 95°F (December 3, 2007).
Does it rain a lot in Key Largo in December?
About 7 days in December have at least 0.01 in of precipitation, and the normal total is 1.9 in. The wettest December in 1991-2020 was in 2015 (11.3 in); the driest was in 2004, with no measurable precipitation.
Is December a good time to visit Key Largo?
December ranks 4th of 12 months on our comfort score for Key Largo (55 out of 100). It has about 6 comfortable days. 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.