Krakow has a temperate climate, influenced by the weather systems that build over the Atlantic. The weather in Krakow in summer, between June and August, is comfortably warm with occasional heat waves when dry continental air comes in from the east. The average temperatures in summer range from 64°F to 67°F (18°C to 20°C), although temperatures can reach 86°F (30°C) during heat waves.An old Polish poem says that in Krakow 'days are longest in June, hottest in July and most beautiful in August'. Autumn in Krakow, between September and November, brings dry, warm days starting with morning mist, and rich, golden colouration of the foliage. Winter is fairly severe and the city is often blanketed in snow, with temperatures dipping below freezing. The average temperatures in winter range from 28°F to 32°F (-2°C to 0°C) but can drop as low as 5°F (-15°C) on cold nights. Spring, between March and May, is arguably the best season in Krakow, when bright, mild days are accompanied by the fragrance of flower blossoms. Rain is most common in summer but can fall at any time of year.Summer is the peak tourist season in Krakow, but to avoid the crowds it is best to visit the city in spring or early autumn, when the weather is mild and pleasant and there is less chance of rain.