Dairy cows usually weigh over half a ton and the average weight for dairy cows varies by breed. The average weight for Ayrshire cattle is 990-2,000 pounds. The average weight for Brown Swiss cows is 1,300-1,400 pounds. The average weight for Guernsey cattle is around 1,000-1,500 pounds. The average weight for Holstein cattle is around 1,500 pounds. Jersey cows can range in weight from 770-1,500 pounds. Milking Shorthorn cows typically weigh between 1,400-1,500 pounds. The average Red & White dairy cattle weigh around 1,400 pounds.