Planning for the weather is a good way to make your trip to Isle of Raasay relaxing and enjoyable, especially when you’re splurging. The hottest months are usually July and August, with an average temperature of 13°C, while the coldest months are January and February, with an average of 6°C. The rainiest months in Isle of Raasay are October, December, November and January, with each month seeing an average of 210 mm of rainfall.