Planning for the weather is a good way to make your trip to La Spezia relaxing and enjoyable, especially when you’re splurging. The hottest months are usually August and July with an average temp of 72°F, while the coldest months are January and February with an average of 49°F. The rainiest months in La Spezia are November, October, December, and January, with each month seeing an average of 8 inches of rainfall.