Shreveport has a humid subtropical climate . Rainfall is abundant, with the normal annual precipitation averaging over 51 inches (1.3 m), with monthly averages ranging from less than 3 inches (76 mm) in August to more than 5 inches (130 mm) in June. Severe thunderstorms with heavy rain, hail, damaging winds and tornadoes occur in the area during the spring and summer months. The winter months are normally mild, with an average of 35 days of freezing or below-freezing temperatures per year, with ice and sleet storms possible.
Summer months are hot and humid, with maximum temperatures exceeding 90 °F (32 °C) an average of 91 days per year, with high to very high relative average humidity. The extreme temperatures range from −5 °F (−21 °C) on February 12, 1899, to 110 °F (43 °C) on August 18, 1909. Shreveport is home to a branch of the National Weather Service which provides forecasts and warnings for the greater Ark-La-Tex region.