December in St. Augustine brings a distinct shift in atmosphere, transitioning from the vibrant energy of autumn to a more subdued, yet still pleasant, winter environment. While the city rarely experiences the harsh freezes common further north, this month marks a move toward cooler, drier conditions that define the region's subtropical climate. Travelers and residents alike find the temperatures ideal for outdoor exploration without the intense summer humidity, making it a popular time to visit the historic district.
Average Temperature Ranges
Understanding the typical temperature in St. Augustine during December requires looking at the average ranges that define the month. Daily highs usually sit comfortably in the mid-60s Fahrenheit, often reaching the upper 60s on particularly sunny days. Overnight lows, however, can dip into the low 40s or even high 30s on clear, calm nights when the heat of the day dissipates quickly.
Daily Highs and Lows
The disparity between daytime highs and nighttime lows is a key characteristic of a December in St. Augustine. Sunny afternoons create a pleasant warmth that allows for shorts and light sweaters, while the setting sun triggers a rapid cooldown. Residents learn to layer their clothing, shedding a light jacket as the mercury rises and adding it back as the evening chill sets in.
What to Wear
Packing for St. Augustine in December revolves around versatility and preparedness for changing conditions. Light sweaters and long-sleeve shirts form the base of a good wardrobe, providing comfort during the mild morning and afternoon hours. For evenings, particularly those spent dining outdoors or walking along the waterfront, a medium-weight jacket or a fleece-lined windbreaker is essential to ward off the chill.
Accessory Considerations
While the humidity drops significantly compared to the summer months, the breezes off the Atlantic can still make the air feel cooler than the actual temperature suggests. Scarves are not strictly necessary but can be a welcome addition for those sensitive to the cold, especially in the early morning or late evening. Comfortable walking shoes are a must, as the historic brick streets can be slippery when damp.
Ocean and Weather Conditions
The ocean temperature during December reflects the cooling trend of the late fall season, with averages hovering around the low 60s Fahrenheit. Swimming is generally considered too cold for most, though the hardy few might still indulge in a quick dip. Surfing conditions, however, remain favorable, with winter swells creating consistent waves along the coastline for experienced riders.
Rainfall is relatively moderate in December, contributing to the lush greenery that persists even in the winter months. The month is not the driest of the year, but storms are usually brief and sporadic rather than the prolonged downpours seen in summer. When the rain does fall, it often comes in the form of quick, intense bursts that clear just as rapidly.
