Glasgow has an oceanic climate characterised by cold, wet winters and cloudy, cool summers. The city has the dubious honour of being the rainiest city in all of the UK, mountains being excluded.
The coldest month of the year is December with an average temperature of 39°F (4°C). Temperatures in July, the year's warmest month, reach an average high of 67°F (19°C).
The city's weather 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 an umbrella handy just in case the weather turns.