Weather will likely play an important role when you plan your trip to Stratford, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually February and January, with an average temperature of 17°C, while the coldest months are July and August, with an average of 11°C. The rainiest months in Stratford are May, August, September and July, with each month seeing an average of 189 mm of rainfall.