Deerfield Beach (FL) Temperature by Month

Deerfield Beach, Florida, United States of America has an average annual maximum temperature of 28°C (82°F), with moderate seasonal shifts ranging from 24°C (75°F) in January to 32°C (90°F) in August. Below you'll find a full monthly breakdown and a comparison with cities worldwide.

The moderate changes in the climate in Deerfield Beach ensure gradual weather shifts through each season. At night, temperatures drop to between 26°C (79°F) and 15°C (59°F) depending on the time of year.

The chart below illustrates the average maximum day and minimum night temperatures in Deerfield Beach by month:

Daily lows are most common between 4 AM and 6 AM. By 3 PM temperatures reach their daily high, driven by peak solar heating. August, the warmest month of the year, receives 263 hours of sunshine.

The chart below shows the average temperature throughout the year:

Deerfield Beach'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:

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.

Perth, Australia averages 25°C (77°F) annually, with a classic Mediterranean climate, hot dry summers and mild wet winters.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In Deerfield Beach, January is the coolest month, with average highs of 24°C (75°F) and humidity around 73%, considered high. In August, the warmest month, temperatures average 32°C (90°F) with 76% humidity, conditions that feel high. For a full picture, see our humidity page.

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.

Seasonal temperature shifts influence more than just how warm it feels, they also drive changes in rainfall, cloud cover, and wind patterns throughout the year.

Warmer air holds more moisture, which tends to mean heavier or more frequent rain during the warmer months. When temperatures drop in winter, any precipitation that does fall is more likely to come as snow or sleet, though in Deerfield Beach this rarely lasts long on the ground.

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