Cycling tights are great for when the chilly weather, with a range of different fabrics from lightweight to extra-warm. Waist tights, and more secure bib tights, which loop over the shoulders are both available, with or without insert (padding)
For those who want to steer clear of the Lycra, cycling trousers could be the answer. Warmth-wise, they're a good alternative to tights and many have an insert for a padded liner. Investing in a pair of waterproof cycling trousers is a must if you're going to be cycling in wet weather, helping to keep you dry. Getting some mountain bike trousers is also essential if you're going to be taking on muddy hills and trails.