Jacksonville (FL) Temperature by Month
The average annual maximum temperature in Jacksonville, Florida, United States of America is 26°C (79°F), with daytime highs ranging from 18°C (64°F) in January to 33°C (91°F) in July. This page covers monthly averages, day-night differences, and how Jacksonville compares to cities worldwide.
Jacksonville Monthly Temperatures
In Jacksonville, temperatures can shift dramatically between very warm in summer and pleasant in winter. Nights follow the same pattern, with lows ranging from 23°C (73°F) in July to 5°C (41°F) in January.
The chart below illustrates the average maximum day and minimum night temperatures in Jacksonville by month:
From around 4 AM to 6 AM temperatures are at their lowest; by 3 PM they've climbed to their daily peak. July, the warmest month, averages 281 hours of sunshine.
The chart below shows the average temperature throughout the year:
Daily Historical Temperatures
50-year average (1976-2025)
Average high and low temperatures for each day of the month based on long-term records.
Average temperatures in July
Historical Jacksonville Temperatures: 1976-2026
Browse day-by-day temperature records for Jacksonville spanning 51 years. Select any month and year to see actual high and low temperatures recorded on each day.
Temperature: Jacksonville 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.
very warm
warm
pleasant
moderate
cold
very cold
Jacksonville vs World: Temperature Compared
Jacksonville'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:
Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.
Reykjavík, Iceland averages 9°C (48°F) a year — mild summers by Icelandic standards, but cold winters and frequent wind.
Boston, USA averages 16°C (61°F) annually, with four distinct seasons and cold winters that rival northern Europe.
Adelaide, Australia averages 21°C (70°F) a year, with warm summers, mild winters, and relatively low rainfall year-round.
What Does the Temperature Feel Like in Jacksonville?
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 Jacksonville, January is the coolest month, with average highs of 18°C (64°F) and humidity around 65% — considered high. In July, the warmest month, temperatures average 33°C (91°F) with 78% 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 Jacksonville this rarely lasts long on the ground.
For more on Jacksonville's weather — including monthly rainfall, sunshine hours, and humidity — visit our Jacksonville climate page.
