The climate of the Slovakia can be described as typical European continental influenced climate with warm, dry summers and fairly cold winters. January is the coldest month with daytime temperatures usually around zero, but in some cases winter months can be very cold with temperatures far below zero and strong, cold northeasterly winds, called Bora, especially in the mountainous regions. Heavy snowfall or even snowstorms are also possible on some days there; the yearly average number of days with snow is less than 40 in the low-land regions and up to 120 days in the mountainous regions of Slovakia.
In summer daytime temperatures reach 20-25°C, but sometimes quite higher, 30°C or more. In most of the time is dry weather with sunny spells, although sometimes heavy Thunderstorms can occur at the end of the day, especially in the mountainous regions. July is the warmest month with an average Temperature of 22°C. Annual Precipitation varies from 400 mm in the southern lowland areas, and up to 1000 mm in the mountainous regions.
The weather is best May-September, when days are warm and the nights are cool, although it rains more in Spring than in summer. Autumn and Winter are usually a little chilly and wet, sometimes snowy and often foggy, especially in the mountainous regions.
Lightweight cottons and linens during summer months; an umbrella or raincoat is advised for local showers. Warmer medium-weights to heavyweights and rainwear are needed during the winter months. A sweater may be needed throughout the year in the evenings or for trekking in the mountains, even in the summer.
The Climate of Slowakia can be classified as Cfb Climate; a warm temperated humid climate with the warmest month lower than 22°C over average and four or more months above 10°C over average.