If you’re hoping to get lost in the rain on your romantic getaway, take a look at these details about year-round temperatures in Holmrook: The hottest months are usually July and August, with an average temperature of 14°C, while the coldest months are February and January, with an average of 6°C. The rainiest months in Holmrook are December, November, October and August, with each month seeing an average of 181 mm of rainfall.