There's nothing like an all-inclusive holiday in Balatonfured to revive you, especially when you know what kind of weather to expect. Here's some information to help you decide when to book: The hottest months are usually August and July, with an average temperature of 21°C, while the coldest months are January and February, with an average of 3°C. March and April are the driest months, while May and September are the rainiest months.