Though efforts to understand human-caused climate change have intensified in recent decades, weather observers have been paying close attention to changes in climate for centuries. This book offers a close look at that work as it was practiced in Canada since colonial times. Victoria C. Slonosky shows how weather observers throughout Canada who had been trained in the scientific tradition inherited from their European forebears built a scientific community and amassed a remarkable body of detailed knowledge about Canada’s climate and its fluctuations, all rooted in firsthand observation. Covering work by early French and British observers, the book presents excerpts from weather diaries and other records that, more than the climate itself, reveal colonial attitudes toward it.