The weather in Glasgow is not one of the city's especially strong points; it has the dubious honour of being named one of the UK's rainiest cities, with at least 170 days of rain a year.
Glasgow's oceanic climate brings cold, wet winters and cloudy, cool summers to the city. Rain isn't limited to any particular season, and the sun also often pops out for a few hours even in winter, despite the cold.
January is the coldest month of the year, with an average high of 43°F (6°C). Snow is infrequent and is mostly limited to a light sprinkle when it does occur. With climate change slowly warming temperatures, the "one good snow" Glasgow used to get every few years around Christmastime is becoming ever rarer. Snow's far less picturesque cousin, sleet, is more likely to make an appearance.
One thing expats will need to get used to in winter is the seemingly ever-present ice that coats pavements and roads. Local authorities regularly salt them to make them less slippery, but it's best to approach with caution.
On the upside, once you're through winter, you can look forward to spring in Glasgow as blooms pop up seemingly everywhere. Summer brings a few lovely, sunny days that feel very warm indeed compared to the icy winters. July, the warmest month, has an average high of 63°F (17°C).
The weather in Glasgow is known for being unpredictable. When Glaswegians joke that it could be sunny in the backyard while raining out front, it isn't far from the truth. Even if it doesn't look like rain is on the way, it's always best to keep a fold-up umbrella or raincoat handy, just in case the weather turns.