As with the rest of the United Kingdom, Manchester's temperate oceanic climate is highly changeable and unpredictable. In general, however, the weather in Manchester is mild, with sunny summers (June to August) and cold, wet winters (December to February). Snowfall is infrequent, but winter days can be frosty and clear. High-pressure systems can sometimes cause very hot summer temperatures or very cold winter temperatures, but these tend to pass quickly. Average summer temperatures range from 50°F (10°C) to 69°F (21°C), while average winter temperatures range from 36°F (2°) to 45°F (7°C). The average temperature in January is around 39°F (4°C), while the average temperature in July is about 59°F (15°C).