/ Today's Weather Almanac / Weather Almanac: December 18 Weather Almanac: December 18 December 18 Today's Weather Fact... On this date in 1957, a tornado swept across southern Illinois and claimed 11 lives. Infoplease Daily IQ Other Weather Facts Select month and date: JanFebMarAprMayJunJulAugSepOctNovDec Related LinksWeather CentralMeteorologyWinter StormsTropical StormsThunderstormsLightningTsunamisUltraviolet Index