Planning for the weather is an important factor for making your trip to Lochgilphead a success, 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 February and January, with an average of 5°C. The rainiest months in Lochgilphead are October, December, November and January, with each month seeing an average of 181 mm of rainfall.