Thunderstorms, Excessive Rainfall Risk For South Florida

MIAMI, FL — The National Weather Service in Miami has issued a forecast of numerous showers and thunderstorms across South Florida today, Tuesday, September 9, 2025, with rain chances favoring the interior and western areas amid near-normal temperatures.

Showers and storms will increase across South Florida heading into the afternoon hours, bringing the threat of heavy rainfall. High rainfall rates along with multiple rounds of heavy downpours could result in more localized flooding. A few storms may become strong, capable of producing gusty and erratic winds up to 35 mph, heavy downpours, and frequent lightning. Excessive rainfall could lead to isolated urban and poor drainage flooding, with reduced visibility.

Temperatures will reach 90 to 93°F, with high humidity amplifying heat indices over 100°F, potentially approaching 105°F.

National Weather Service Miami South Florida Precipitation Forecast

Rainfall chances today are high, with Palmdale at 87%, Clewiston at 89%, West Palm Beach at 83%, Immokalee at 87%, Naples at 82%, Everglades City at 84%, Fort Lauderdale at 82%, Miami at 75%, Homestead at 73%, and Flamingo at 68%, according to the NWS forecast. These probabilities show numerous shower and thunderstorm activity across South Florida, with potential for localized heavy rainfall.

Storm Timing:

• Morning: Widely scattered thunderstorms
• Afternoon into evening: Increased coverage of showers and thunderstorms

Possible Hazards:

• Heavy downpours with poor visibility
• Localized urban flooding, especially in urban areas and roadways
• Gusty, erratic winds from strong storms up to 35 mph
• Frequent lightning strikes

National Weather Service Miami South Florida Doppler Radar

Miami Weather Forecast

Today

Showers and thunderstorms likely, mainly after 2pm. Mostly sunny, with a high near 90°F. Heat index values as high as 105°F. South wind 5 to 9 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

Tonight

A 30 percent chance of showers and thunderstorms, mainly before 9pm. Mostly cloudy, with a low around 82°F. Southeast wind around 6 mph.

Wednesday

A 40 percent chance of showers and thunderstorms, mainly after 2pm. Mostly sunny, with a high near 91°F. Heat index values as high as 103°F. Southeast wind 6 to 10 mph.

Wednesday Night

A 30 percent chance of showers and thunderstorms, mainly before 8pm. Mostly cloudy, with a low around 82°F. Southeast wind 3 to 6 mph.

Thursday

A 40 percent chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 91°F. Light and variable wind becoming southeast 5 to 7 mph in the morning.

Thursday Night

A 30 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 82°F. Southeast wind around 6 mph.