<sod > "Fall's always a season of temperature roller coasters, especially the prairies and especially in the Calgary area," said Weather Network meteorologist Doug Gillham.< eod>< sod > "Fall's always a season of temperature roller coasters, especially the prairies and especially in the Calgary area," said Weather Network meteorologist Doug Gillham. "You're still going to see the temperature swings that you expect, but we think the peaks will outweigh the valleys on the roller coaster as we make the transition from summer to winter.< eod>