Annual Precipitation Across the Gulf of Mexico

Rainfall Variability Around the Gulf

Annual precipitation varies significantly by subregion:

• Northern Gulf (TX, LA, MS, AL, FL Panhandle): 1,270–1,520 mm (50–60 in)
• Eastern Gulf (FL Peninsula, SW FL): 1,520–1,780 mm (60–70 in)
• Western Gulf (South TX, N Mexico): 760–1,020 mm (30–40 in)
• Southern Gulf (Yucatán, Cuba): 1,000–1,500 mm (40–60 in), with wet/dry seasonality

Peak rainfall occurs in summer (convective storms, tropical systems). Winter fronts bring additional rain to the north. The gradient reflects latitude, prevailing winds, and tropical cyclone frequency.