Planning for the weather is a good way to make your trip to Ullapool relaxing and enjoyable, especially when you’re splurging. The hottest months are usually July and August, with an average temperature of 12°C, while the coldest months are January and February, with an average of 4°C. The rainiest months in Ullapool are December, October, January and November, with each month seeing an average of 176 mm of rainfall.