90 °F (32 °C). However, the humidity results in a heat index higher than the actual temperature. Summer mornings average nearly 90 percent humidity and nearly 60 percent in the afternoon. Scattered afternoon thunderstorms are common in the summer. The hottest temperature ever recorded in Brunswick was 106 °F (41 °C) in 1986. Winters in Brunswick are fairly temperate. The average high in January, the coldest month, is 63 °F (17 °C), while the average low is 44 °F (7 °C). Snowfall is very rare. The last snow accumulation in Brunswick was on December 23, 1989. The coldest temperature ever recorded in Brunswick was on January 21, 1985, and January 30, 1966. Brunswick receives a high amount of rainfall annually, averaging about . The wettest months are August and September, the peak of hurricane season. The city has suffered less damage from hurricanes than most other East Coast cities. A major hurricane has not made landfall on the Georgia coast since 1898, and the only hurricane that has hit the coast since then was Hurricane David in 1979. However, the city has experienced hurricane or near-hurricane conditions several times due to storms passing through Florida from the Gulf of Mexico and entering Georgia or passing to the north or south in the Atlantic and brushing the area. Environment The Brunswick area has four Superfund sites, formerly home to heavily contaminated toxic waste sites: the LCP Chemicals site, Brunswick Wood Preserving, the Hercules 009 Landfill, and the Terry Creek Dredge Spoil Areas/Hercules Outfall. Research published in 2011 revealed that bottlenose dolphins that fed in the estuaries near these Superfund sites had the highest concentration of PCBs of any mammal in the world. Demographics In 2000, the city of Brunswick had 15,600 people, 6,085 households, and 3,681 families living in the city, down from the city's initial historic high of 21,703 in 1960. There were 6,952 housing units at an average density of . At the 2010 United States census, there were 15,383 people living within the city; experiencing population fluctuations since, the 2020 U.S. census reported a population of 15,210 people, 6,486 households, and 3,781 families residing in the city. Among the city's population between 2015 and 2020, the American Community Survey estimated a median age of 34.8, down from 2000's 35 years. Approximately 16.7% of the population were from under 5 years of age to 5 to 9 years; 20.5%