Jacksonville, Florida – Sweltering heat and the risk of strong thunderstorms return to Jacksonville on Friday, July 18th, just as thousands plan weekend getaways across Northeast Florida. Temperatures will soar to 94°F, but the heat index could climb past 100 by midday, creating hazardous outdoor conditions and raising concerns for heat-related illness. Anyone heading out on I-295 or I-95 should prepare for fast-changing weather and slowdowns, especially during the afternoon commute.
According to the National Weather Service, Friday brings a 50 percent chance of thunderstorms after 2 p.m., with downpours, lightning, and gusty winds likely to impact travel. The agency urges residents to stay hydrated, limit outdoor exposure, and secure loose items ahead of possible storms. Heat advisories may be posted if the heat index spikes above 103°F.
Storm chances persist into the weekend. Saturday and Sunday both bring a 30 percent risk of afternoon thunderstorms, with highs near 96°F and 97°F. Late-day storms may bring heavy rain to local roads and neighborhoods, so keep an eye on real-time alerts if your plans include the St. Johns River or local parks.
The pattern holds into early next week. Monday will be partly sunny with scattered thunderstorms and another steamy high near 97°F. Residents should prepare for spotty power outages and possible street flooding, especially where storms linger.
What’s Next:
This summer weather pattern, marked by hot afternoons and scattered storms, is set to continue through Wednesday, July 23rd. More advisories are possible—monitor official updates before making outdoor or travel plans.
Five-Day Forecast: Jacksonville, FL (July 18–23)
- Friday, July 18: 50% chance thunderstorms after 2 p.m.; High: 94°F; Heat index up to 103°F; winds SSW 6–10 mph
- Saturday: 30% chance afternoon thunderstorms; Hot, High: 96°F; winds S 3–6 mph
- Sunday: 30% chance afternoon thunderstorms; High: 97°F; partly sunny, muggy
- Monday: 50% chance thunderstorms, mainly after 2 p.m.; High: 97°F; humid
- Tuesday: 50% chance thunderstorms likely; Partly sunny, High: 93°F
