Here’s a few tips for the cold weather, pulled from various sources
Layer it.
Layering clothes is the key to comfort! Start with a base layer that wicks sweat, then a medium-weight layer (such as a light fleece) and finish off with a windproof jacket. A light windbreaker is good for temps near 5 degrees, but a heavier jacket can be used for temps around freezing and below.
Protect the extremities.
Your hands, feet and head get colder more quickly than your core, so make sure to wear gloves, thick socks (such as wool) or even shoe covers, as well as a hat that fits under your helmet. Using a helmet with less ventilation helps keep your noggin toasty too.
Cover Up.
Legs should be covered completely in the cold, but thick layers are not usually necessary. Leggings, bib-tights, knee/leg warmers, athletic tights, jeans and slacks are generally fine. Layering tights/trousers in freezing temps also helps!
Be flashy.
Because the days are shorter in the winter (and sometimes duller), it’s important to be visible. Wear bright clothing (neon) with reflective strips and always have lights on your bike (white for the front and red for the rear).
Fat tires.
Wider tires with some tread add stability, traction and control on winter surfaces that can sometimes be wet, snowy or even icy. Depending on your wheel size, adding thicker and knobbier tires may make winter riding easier. Talk to your local bike shop about the best tire choice for your riding conditions.
Accessorize.
Mudgurads make a huge difference on wet days because they block the rain from splashing on your shoes and clothes, keeping you nice and dry. They’re inexpensive yet very effective, so totally worth the (small) investment.
A popular recent invention is the Ass Saver – here’s how to make your own.
Tread lightly.
If you encounter snow or ice, don’t panic! Sudden braking or swerving can cause you to slide. Be light on your pedal strokes, delicate on the brakes and ride in a straight line if possible. You can always dismount and walk the bike if it looks too dangerous.
Plan ahead!
The most important advice for riding your bike in the winter is to check the weather forecast ahead of time! Don’t ride if conditions are poor (heavy snow and ice), but don’t be afraid to ride if the bike paths and roads are clear and temps are above freezing!