St. Augustine weather in December
Temperature, sea and sunshine in December: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in December
Poor
Best time to visit: May – July, October
What is the weather like in St. Augustine in December?
In December, St. Augustine is mild: daytime highs average 19 °C, and nights cool down to about 14 °C. The sea averages 19.9 °C – bracing, so a wetsuit helps for longer swims. Expect around 5 hours of sunshine a day. Rain falls on about 7 days, adding up to 57 mm. All in all, December is not an ideal month for a holiday in St. Augustine.
December compared
How the weather changes from November to January. Tap a month to open it.
| NovemberNov | DecemberDec | JanuaryJan | |
|---|---|---|---|
| Score | 60 | 35 | 28 |
| Day | 22° | 19° | 18° |
| Night | 17° | 14° | 12° |
| Sea | 23° | 20° | 18° |
| Sun | 6 h | 5 h | 6 h |
| Rain days | 6 | 7 | 7 |
More details for December
- Daylight
- 10 h 14 min07:13 – 17:28
- UV index
- 3 · moderateclear sky, noon (estimate)All months
- Muggy days
- 5 daysdew point 18 °C or moreAll months
- Wind
- 20 km/haverage daily peakAll months
- Cloud cover
- 54 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Time zone
- UTC−5America/New_York
How the score comes together
- Temperatureweight 35 %5 %
- Seaweight 25 %41 %
- Sunshineweight 20 %37 %
- Few rainy daysweight 20 %79 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in December
- Wetsuit for longer swims
- Sunscreen
- A jumper for the evenings
St. Augustine in December: quick answers
Is St. Augustine hot in December?
No. In December, St. Augustine is mild: daytime highs average 19 °C and nights drop to about 14 °C.
Can you swim in St. Augustine in December?
Only if you don't mind cold water: in December the sea averages just 19.9 °C. Comfortable swimming is possible from April to November.
Does it rain much in St. Augustine in December?
Rain falls on about 7 days, adding up to 57 mm.
St. Augustine month by month
The whole year in St. AugustineAll destinations: USAFlorida weather in DecemberWhere to go in DecemberSea temperature in December
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences