The first full week of fall will get off to a dry start across the northern third of Florida, but the rainy season is likely not over just yet. The low rain chances and lower humidity moving in are a side effect of Hurricane Maria. Even though the large circulation is well offshore to the east, the counter-clockwise motion around it will pull down drier air from the north. As a result, little or no rain is expected north of the I-4 corridor through Wednesday.
Drier air heats and cools faster than humid air. This change in airmass will ensure sunny skies and warm afternoons, but also allow temperatures to cool more in the overnight hours. Evenings and mornings will be more pleasant, with even a few spots falling well into the 60s for morning lows. Afternoon highs will be above normal for this time of year, and generally in the lower 90s.
It won’t take long for the humidity to surge back north as Maria’s circulation influences pull away midweek. In fact, an approaching front will also help to draw up deeper moisture from the Gulf of Mexico by the end of the week. With more moisture in the atmosphere, showers and thunderstorms will become more likely, especially in the afternoon and early evening hours and along the inland-advancing sea breeze fronts. The rainy season in Florida usually ends in late September or early October, but somewhat ambiguous date varies year to year and by location.
UF Forecaster Bryan Boggiano contributed to this story.