St. Augustine (FL) Temperature by Month

St. Augustine in Florida, United States of America sees significant seasonal temperature differences, with daytime highs between 19°C (66°F) in January and 32°C (90°F) in July, averaging 26°C (79°F) annually. Explore the full monthly breakdown below.

The climate in St. Augustine is known for significant temperature differences throughout the year. At night, this contrast is just as clear, with lows ranging from 24°C (75°F) in July to 8°C (46°F) in January.

The chart below illustrates the average maximum day and minimum night temperatures in St. Augustine by month:

The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM.

The chart below shows the average temperature throughout the year:

St. Augustine's average annual maximum temperature is 26°C (79°F). To put that in context, here's how it compares to a few well-known destinations:

Lisbon, Portugal averages 21°C (70°F) annually, warm summers, mild winters, and rain mainly in the cooler months.

Toronto, Canada averages 13°C (55°F) annually, with cold snowy winters balanced by genuinely warm summers.

Osaka, Japan averages 22°C (72°F) annually, with hot humid summers, mild winters, and pleasant spring and autumn seasons.

Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained, so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.

For more on St. Augustine's weather, including monthly rainfall, sunshine hours, and humidity, visit our St. Augustine climate page.