Planning for the weather is an important factor for making your trip to Geraldine a success, especially when you’re splurging. The hottest months are usually February and January, with an average temperature of 7°C, while the coldest months are July and August, with an average of -3°C. The rainiest months in Geraldine are May, September, December and July, with each month seeing an average of 360 mm of rainfall.