Boca Raton Weather Forecast for Sept. 7–14: Persistent Heat and Daily Storm Threat

Elevated Heat Indexes Reaching Up to 112 Degrees and Recurring Thunderstorms to Dominates South Florida Outlook Boca Raton faces an extended stretch of late-summer heat and instability from Monday, Sept. 7 through Monday, Sept. 14. High temperatures will consistently hover in the low 90s, with RealFeel heat values frequently breaking triple digits—peaking at 112°F on Monday—while daily afternoon downpours and scattered thunderstorms threaten localized street flooding across Palm Beach County. Early Week: Intense Heat and Localized Downpours Monday, Sept. 7: High of 94°F (Low 76°F). Humid with variable cloudiness. Morning thunderstorms followed by heavy afternoon storms. RealFeel index hits 112°F with a Max UV index of 9.0 (Very High). Wind SSW at 6 mph. High of 94°F (Low 76°F). Humid with variable cloudiness. Morning thunderstorms followed by heavy afternoon storms. RealFeel index hits 112°F with a Max UV index of 9.0 (Very High). Wind SSW at 6 mph. Tuesday, Sept. 8: High of 92°F (Low 81°F). Mostly cloudy and humid with a 55% chance of afternoon thunderstorms. RealFeel index reaches 107°F; wind shifts S at 8 mph. High of 92°F (Low 81°F). Mostly cloudy and humid with a 55% chance of afternoon thunderstorms. RealFeel index reaches 107°F; wind shifts S at 8 mph. Wednesday, Sept. 9: High of 94°F (Low 82°F). Morning showers leading into sunlit, humid periods. Heavy downpours pose a risk of temporary street and poor-drainage flooding. RealFeel reaches 109°F with an E wind at 10 mph. Midweek to Weekend: Cloud Cover and Increased Rain Hours Thursday, Sept. 10: High of 93°F (Low 80°F). Sunny spells giving way to afternoon clouds and localized thunderstorms. RealFeel index holds at 109°F. High of 93°F (Low 80°F). Sunny spells giving way to afternoon clouds and localized thunderstorms. RealFeel index holds at 109°F. Friday, Sept. 11: High of 92°F (Low 80°F). Overcast, humid conditions with ongoing storm threats. UV index drops to 3.0 (Moderate), with about 2 hours of active precipitation expected. High of 92°F (Low 80°F). Overcast, humid conditions with ongoing storm threats. UV index drops to 3.0 (Moderate), with about 2 hours of active precipitation expected. Saturday, Sept. 12: High of 91°F (Low 79°F). Occasional morning rain and thunderstorms transition into mostly cloudy conditions. RealFeel hits 109°F with 2.5 hours of rainfall anticipated. Extended Outlook: Tapering Moisture Into Early Next Week Sunday, Sept. 13: High of 92°F (Low 78°F). Persistent cloudiness and humidity accompanied by occasional rain and isolated thunderstorms (3.5 hours total precipitation). High of 92°F (Low 78°F). Persistent cloudiness and humidity accompanied by occasional rain and isolated thunderstorms (3.5 hours total precipitation). Monday, Sept. 14: High of 91°F (Low 77°F). Partly sunny skies return, though early morning showers remain likely before clearing. RealFeel index settles at 107°F as UV levels rebound to a Very High 9.0. Subscribe for Weather Alerts: Stay up-to-date with our weather alert service by subscribing here .