Port St. Lucie, FL weather in December
Port St. Lucie is mild and often humid in December, with some rain: highs average 74°F and nights drop to about 57°F. Expect about 8 wet days.
- Normal high
- 74°F
- Normal low
- 57°F
- Wet days
- 8
- 2.4 in total
- Muggy days
- 12
- dew point 65°F+
How December changes from start to finish
| December 1 | December 31 | |
|---|---|---|
| Normal high | 76°F | 73°F |
| Normal low | 59°F | 54°F |
| Chance of a wet day | 29% | 26% |
| Sunrise / sunset | 6:54 am / 5:26 pm | 7:11 am / 5:37 pm |
| Daylight | 10.6 h | 10.4 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 December day
- 6 am64°Fdew point 59°F
- 9 am69°Fdew point 61°F
- Noon75°Fdew point 61°F
- 3 pm75°Fdew point 60°F
- 6 pm71°Fdew point 60°F
- 9 pm68°Fdew point 61°F
NOAA hourly normals (local standard time) from West Palm Beach Intl Airport (45 mi away); average wind 9 mph; clear or few clouds in 51% of daytime hours, mostly cloudy or overcast in 34%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F9 of 31
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph7 of 31
- Hot dayshigh 90°F or more0 of 31
- Muggy daysdaily mean dew point 65°F or more12 of 31
- Wet daysat least 0.01 in of rain or melted snow8 of 31
- Notable rainat least 0.10 in5 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 2.4 in; a dry December brings about 1.0 in and a wet one about 3.7 in (25th and 75th percentiles). About 1 day brings half an inch or more, and about 1 an inch or more.
How December varies from year to year
- Warmest December, 1991-20201998: average high 80°F
- Coolest December2010: average high 66°F
- Wettest December1994: 7.4 in
- Driest December2001: 0.1 in
- Highest reading88°F (December 2, 2016)
- Lowest reading24°F (December 27, 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 | 78°F | 74°F | 72°F |
| Normal low | 62°F | 57°F | 53°F |
| Wet days | 10 | 8 | 8 |
| Comfortable days | 7 | 9 | 12 |
| Daylight | 10.8 h | 10.4 h | 10.6 h |
Highs change by -4°F from November and -2°F into January.
Nearby alternatives in December
- Warmer: Key Largo, FL153 mi · high 80°F · 7 wet days
- Cooler: Palm Coast, FL167 mi · high 69°F · 10 wet days
How Port St. Lucie ranks in December
- Normal high17th warmest of 378 cities; 10th of 23 in Florida
- Wet days148th driest of 378
- Comfortable days80th most of 340
What to pack for Port St. Lucie in December
- A rain jacket or umbrella – rain on about 8 days
Heating and cooling
December has 93 heating degree days and 107 cooling degree days (base 65°F), 5% of the year's total heating and cooling demand.
Questions
How hot is Port St. Lucie in December?
The normal high is 74°F and the normal low is 57°F. From 1991 to 2020 the hottest December reading was 88°F (most recently on December 2, 2016).
Does it rain a lot in Port St. Lucie in December?
About 8 days in December have at least 0.01 in of precipitation, and the normal total is 2.4 in. The wettest December in 1991-2020 was in 1994 (7.4 in); the driest was in 2001 (0.1 in).
Is December a good time to visit Port St. Lucie?
December ranks 5th of 12 months on our comfort score for Port St. Lucie (57 out of 100). It has about 9 comfortable days. The best months are January, February and March.
Where the numbers come from
- Temperature, rain, snowfall and snow depth: Ft Pierce (USC00083207), 10 mi N of the city center, 25 ft . NOAA normals and daily records, 1991-2020.
- Frost dates: Stuart (USC00088620), 9.9 mi SE of the city center, 13 ft . NOAA normals and daily records, 1991-2020.
- Humidity and wind by hour: West Palm Beach Intl Airport (USW00012844), 45 mi SSE of the city center, 19 ft . NOAA normals and daily records, 1991-2020.
- Cloud cover: Melbourne Intl Airport (USW00012838), 58 mi NNW of the city center, 22 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Palm Beach International Airport (722030-12844), 45 mi SSE of the city center, 11 ft . Hourly observations, 1991-2020.