Taking the local weather in Forest Green into account is an important factor for planning your visit, especially if you plan to spend your trip by the pool. The hottest months are usually July and August, with an average temperature of 14°C, while the coldest months are February and December, with an average of -6°C. The snowiest months in Forest Green are February, March, October and January, with each month seeing an average of 28 cm of snowfall.