The city has a humid subtropical climate, with hot, very humid summers and very short, mild winters. In November through February, the weather is the coolest. A noticeable warming trend occurs in March through April. The warmest part of the year is June through September, with August being the peak of summer. October in the city is very warm, but not as hot as the summer. The city itself much like the Gulf Coast of Texas experiences just two seasons, a wet season from April to October and a dry season from November to March. Corpus Christi is very windy, with wind speeds often reaching to 25 miles per hour (40 km/h; 11 m/s) with gusts reaching more than 35 mph (56 km/h; 16 m/s). The city’s record high temperature is 109 °F (43 °C), on September 5, 2000, and the hottest month August 2012 with an average of 88.3 °F (31.3 °C). Average night-time winter lows in January, the coldest month, are a little less than 50 °F (10 °C) and its record low is 11 °F (−12 °C) on February 12, 1899, and the coldest maximum 26 °F (−3 °C) on five occasions, the most recent being on January 30, 1951. Winter and early spring are generally dry, and average monthly precipitation is highest in September, when the threat from hurricanes and other tropical weather systems is greatest. The coolest month on record has been February 1905, with a mean of 45.6 °F (7.6 °C). In December 2004, the city experienced snowfall on Christmas Eve, the city’s largest recorded snowstorm at 4.4 in (11 cm). The snow melted the day after Christmas. The city experienced light snowfall a second time, on December 8, 2017, nearly 13 years later.
Between 1981 and 2010, Corpus Christi averaged 31.73 in (806 mm) of rainfall; however, long periods with very little rainfall are normal, and hurricanes can frequently produce daily falls of over 4 in (100 mm). The wettest day on record is July 2, 2007, with 9.86 inches or 250 millimetres, while the wettest month on record is September 1967, with 20.33 in (516 mm), including four days with over 3 in (76 mm). Eight months with not even a trace of rainfall have happened, of which the most recent was May 1998, and 21 with merely a trace. The longest spell without measurable rainfall in Corpus Christi has been 55 days from June 23 to August 17 (inclusive) of 1895, and from June 1 to July 25 of 1915, while easily the driest calendar year has been 1917, with a mere 5.38 in (137 mm). The two wettest calendar years have been 1888 with 48.16 in (1,223 mm) and 1991 with 48.07 in (1,221 mm), although from August 1967 to July 1968, 59.09 in (1,501 mm) fell, and for the 12 months ending January 1918, only 5.22 in (133 mm).
Hurricanes rarely hit the city, but those which have were destructive, such as the 1919 Florida Keys hurricane and Hurricane Harvey in 2017. The city also can see tornadoes, with an F2 tornado hitting the area on April 29, 1961.