Question: what is the weather like in seattle in late march?
Answer: Average Weather in March in Seattle Washington, United States. Daily high temperatures increase by 5°F, from 53°F to 57°F, rarely falling below 46°F or exceeding 66°F. Daily low temperatures increase by 3°F, from 40°F to 43°F, rarely falling below 33°F or exceeding 49°F.