Ranked here are the hottest decades on record for Jacksonville, Florida. The lists include decades when Jacksonville had the highest average temperatures, the most hot days and the fewest cold days. These extremes are for temperatures observed at Jacksonville International Airport and cover eight decades, from the 1940s to the 2010s.
That is when Jacksonville had weather measurements that are consistent and complete enough to compare decades. Each decade comprises a standard 10-year range. For instance, the 1990s includes measurements from Jan 1, 1990 to Dec 31, 1999.
Links to the data behind these lists are in the References section on this page.
Hottest High Temperatures
Average daily maximum temperature at Jacksonville
|
High °F |
Decade |
High °C |
| Highest |
80.3 |
2010s |
26.8 |
| Runner-up |
79.9 |
1950s |
26.6 |
Warmest Low Temperatures
Average daily minimum temperature at Jacksonville
|
Low °F |
Decade |
Low °C |
| Highest |
59.6 |
1950s |
15.3 |
| Runner-up |
59.5 |
1940s |
15.3 |
Most Warm Days
Total days per year on average when Jacksonville had temperatures of at least 70 °F (21 °C)
|
Days |
Decade |
| Highest |
298 |
2010s |
| Runner-up |
293 |
1940s |
Most Hot Days
Total days per year on average when Jacksonville had temperatures of at least 90 °F (32 °C)
|
Days |
Decade |
| Highest |
96 |
1950s |
| Runner-up |
88 |
2010s |
Fewest Freezing Days
Total days per year on average when Jacksonville had temperatures of 32 °F (0 °C) or lower
|
Days |
Decade |
| Lowest |
10 |
1940s |
| Runner-up |
12 |
1990s, 1960s, 1950s |