Siesta Key (FL) Temperature by Month
The average annual maximum temperature in Siesta Key, Florida, United States of America is 28°C (82°F), with daytime highs ranging from 22°C (72°F) in January to 32°C (90°F) in August. This page covers monthly averages, day-night differences, and how Siesta Key compares to cities worldwide.
Siesta Key Monthly Temperatures
The moderate changes in the climate in Siesta Key ensure gradual weather shifts through each season. At night, temperatures drop to between 25°C (77°F) and 12°C (54°F) depending on the time of year.
The chart below illustrates the average maximum day and minimum night temperatures in Siesta Key by month:
Temperatures tend to bottom out between 4 AM and 6 AM, then climb to their daily peak around 3 PM.
The chart below shows the average temperature throughout the year:
Temperature: Siesta Key vs the United States of America
The map below shows the annual temperature across the United States of America. You can also select individual months if you want to compare a specific time of year.
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Siesta Key vs World: Temperature Compared
Siesta Key's average annual maximum temperature is 28°C (82°F). To put that in context, here's how it compares to a few well-known destinations:
Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.
Glasgow, Scotland averages 13°C (55°F) a year — mild but often grey, with cold winters and rarely hot 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.
Global average temperatures have risen by around 1.2°C since the pre-industrial era, and the effects are visible across many regions. Winters are milder on average, with fewer frost days and less snow in many parts of the world. Heatwaves are more frequent and more intense, and Europe's summers of 2018, 2019, and 2020 all set records.
Summers are also getting drier in some areas, while winter rainfall has increased in others. This contributies to higher river levels and more flooding. In many countries, spring arrives earlier and autumn lasts longer. It has knock-on effects for wildlife, agriculture, and local ecosystems.
For more on Siesta Key's weather — including monthly rainfall, sunshine hours, and humidity — visit our Siesta Key climate page.
