Simplify the following text for a Grade 12 native English-speaking person.
Original: This type of climate offers some of the most extreme seasonal temperature variations found on the planet : In winter , temperatures can drop to 40 Â C ( also 40 Â F ) and in summer , the temperature may exceed 30 Â C ( 86 Â F ) .
Simplified: This type of climate offers some of the most extreme seasonal temperature variations found on the planet : In winter , temperatures can drop to and in summer , the temperature may exceed .