June heat wave shatters records in Jacksonville
Jacksonville, Florida is enduring an unrelenting stretch of extreme heat, with temperatures soaring into the 90s Fahrenheit (above 32°C) for 31 days since the beginning of 2025—a historic streak that has already broken multiple records and shows no sign of easing.
May 2025: A month of broken milestones
This brutal heat wave began early, with May 2025 setting a new local record: 19 days reached or exceeded 90°F (32.2°C) at Jacksonville International Airport, surpassing the previous May record of 17 days set in 1990.
June intensifies: 31 days and counting of 90°F highs
As of June 9, the number of 90-degree days reached 30, beating the 2011 record of 28 days for this same period. That figure jumped to 31 on June 10, when the high reached 94°F (34.4°C)—a full 17 degrees above Jacksonville’s typical early June average.
In a normal year, Jacksonville would expect only 14 such hot days in the same span. This year’s anomaly is nearly double the average, indicating a remarkable deviation from seasonal norms.
High heat index exacerbates discomfort
On top of the air temperature, heat index values—which combine humidity and heat—have soared past 105°F (40.6°C) in multiple neighborhoods, compounding the danger of heat-related stress for residents and outdoor workers. The National Weather Service has warned that “feels-like” conditions will remain oppressive through the weekend, even as scattered showers and thunderstorms are expected to pass through the region.
Little relief in sight as 10-day forecast remains steamy
Forecasts through mid-June continue to show above-normal temperatures across Northeast Florida, with highs hovering in the lower to mid-90s Fahrenheit (33–35°C). Despite chances for precipitation, especially in the late afternoon hours, the prevailing heat dome remains intact, limiting any cooling effects from rainfall.
This prolonged hot spell in Jacksonville is part of a wider trend across the Southeast United States, which is experiencing an early onset of summer heat and atmospheric stagnation due to a persistent ridge of high pressure dominating the region.
