Upstate New York is in the middle of the temperate zone
and thus has a distinct autumn, winter, spring, and
summer. Summertime temperatures can rise into the 90's
(30+ degrees Celsius), while cold snaps in winter can
reach the single digits (
degrees Celsius). Ithaca
does not suffer lake-effect snow, unlike the neighboring
cities of Syracuse and Rochester, but does usually receive
several substantial snowfalls each winter.
Ithaca has gained itself a reputation for having a gray, rainy climate and long, harsh winters. While the winters can bring large snowstorms and bitter cold, and the springs are characterized by bouts of gray skies and persistent drizzle, the region also enjoys stretches of dry, clear weather. Grads' perceptions of the weather seem to be largely relative to the weather they are used to from their home city -- some find it dreary and gloomy while others find the weather normal, if not pleasant.
The most important thing to keep in mind about Ithaca weather is that it does reach very low temperatures during the winter, particularly at night. Frostbite can be a serious concern, but only if you don't dress appropriately. You will need to have a heavy winter coat, good boots, a hat (or hood), and gloves. It's worth investing in a good all-weather winter jacket (if the lining zips out, it can also be used as a raincoat in warmer weather). Sturdy, waterproof footwear is also not a bad idea, both for navigating the local hills and for keeping your feet dry in snow and rain.
See the essay in section 9.6 on surviving an Ithaca winter.