Eating and drinking regularly is important year-round for a fun, successful ride. It's easy in the summer. You pull out a bottle or something from a jersey pocket and drink or eat on the bike. When it is colder and wetter, your nutrition may be less accessible, but you still need it! In fact, you need even more: In colder weather, add 10% to 20% to your caloric burn rate. You also need the same amount of hydration no matter the season: Follow this rule year-round: drink to satisfy your thirst.