Maximiliano Herrera
Founder of the "Extreme Temperatures Around the World" website, Maximiliano Herrera is a professional climatologist and weather historian who specializes in climatic statistics and extreme weather. As an independent researcher, he has been analysing worldwide metadata and keeping track of weather records since 1992. Additionally, Max is a long-time collaborator with community-driven meteorology service Weather Underground owned by The Weather Company.
Greatest temperature range in a day
The greatest temperature variation in a single location in a 24-hour period is 57.2°C (103°F), recorded in Loma, Montana, USA, on 14-15 January 1972. Over the course of a day, the town experienced a rise from -47.7°C (-54°F) at 9 a.m. on 14 January to 9.4°C (49°F) by 8 a.m. on 15 January.The extreme plunge in temperature in Loma was caused by a downslope chinook wind event. The previous one-day greatest temperature range (and still holding the record for greatest fall in temperature) also took place in Montana: the town of Browning experienced a drop of 56°C (100°F), from 7°C (44°F) to -49°C (-56°F) on 23-24 January 1916.