Semi-tropical in nature, with an average yearly temperature of 69.5°, the weather of New Orleans is remarkably equable, subnormal cold and excessive heat being rare. The winters and summers are generally moderate, Gulf breezes and the proximity of numerous bodies of water serving to modify extremes of temperature. Recordings of over 100° and below 20° very seldom occur. The mean annual precipitation is 59.45 inches, an annual rainfall that exceeds that of any other large city in the United States with the exception of Mobile and Miami. The highest annual rainfall in New Orleans, 85.73 inches, occurred in 1927; the lowest, 31.7, in 1899.
The prevailing winds are from the Gulf, generally from the southeast. Tropical hurricanes, which harass most points of the Gulf Coast, very seldom strike New Orleans. Occasional fogs occur in the spring and winter months, particularly along the river-front, but are, as a rule, of short duration.