After a warm and at times sunny end to the week, with mountain temperatures reaching up to 18 degrees Celsius, cooler air will start to move into the Czech Republic. This will be noticeable by the weekend, with temperatures dropping even more sharply next week.
The weather over Central Europe at the end of the workweek will be influenced by high pressure situated over the southeastern part of the continent. Behind it, very warm air will return to the Czech Republic, especially in mountainous areas. Meanwhile, inversions in the lowlands will trap fog and cold. On Thursday, a marked temperature inversion will dominate with low clouds or fog persisting, particularly over most of Moravia and parts of northwestern Bohemia, while other areas and mountains will experience partly cloudy skies.
Inversion combined with the föhn effect will create significant temperature differences. Where fog dissipates, temperatures will reach 9 to 14 °C, while under persistent low clouds temperatures will hover around 6 °C. In the lee of mountains, especially in Pošumaví and Jeseníky regions, the föhn wind could raise temperatures locally up to 18 °C, with warmth persisting through the night.
Wind conditions will be generally light, up to 4 m/s from the south, but stronger in mountain and Silesian regions with gusts up to 15 m/s (about 55 km/h).
Friday’s weather pattern will resemble Thursday’s, with mostly partly cloudy skies but fog or low clouds lingering in many areas, especially Moravia. Warm air advection will peak on Friday with temperatures slightly higher, maintaining the same pattern of warm spots under clear skies (10-15 °C), cooler foggy areas around 7 °C, and strong föhn effect locally pushing temperatures to 18 °C. Winds will remain stronger in mountains and Silesia.
A cold front will start influencing the country on Saturday. Morning fog or low clouds may still appear, but later the sky will become overcast with frontal cloudiness and some rain showers, particularly in the north. Along with the cooling from the north, the country will be divided thermally, with the south warming to 12 °C while the north stays cooler between 6 and 9 °C. Night temperatures will fall to 7 to 3 °C, with clearer skies leading to temperatures near or below freezing.
Sunday will bring no major change: cloudy skies with occasional rain, turning to snow above 1000 meters. Daytime temperatures will range from 8 to 12 °C in the south and 6 to 9 °C in the north, with nighttime lows of 7 to 3 °C. Winds will be light and variable.
Monday’s cold front will bring rain transitioning to snow above 500 meters. No significant snow cover is expected. Temperatures will continue to fall: daytime highs 4 to 8 °C and nighttime lows between 3 and -1 °C.
Into next week, cold air from the north will continue to flow into Central Europe. The weather will be mostly partly cloudy to cloudy with occasional showers turning snowy at higher elevations. Temperatures in the Czech Republic will be below average, with daytime highs typically between 0 and 5 °C and nighttime lows dropping below freezing in many areas, potentially reaching -5 °C under clear skies.
How long the cold spell will last remains uncertain, but current models suggest it may persist at least until the weekend, albeit with significant forecast variability. It is likely that most of next week will experience below-average temperatures.