Warsaw in general experiences a humid climate. Although it does in a way offer you winters that are cold and snowy, the summers generally are mild for most of the time, but it also gets really hot at times with the temperature going up to 30 degree Celsius.
The average temperature in winter is -3 degree Celsius in mid winter and 19 degree celsius during most of the summer season. Warsaw like Poland experiences four seasons:
The best time to visit Warsaw in terms of Climate starts from April and runs up to October. It is better to avoid July and August as this is the peak season of tourists and the city can become unpleasantly crowded.