Why the forecast becomes less certain further into the week
Small differences in the atmosphere can grow over time. Forecast ensembles help describe the range of possible outcomes rather than hiding it behind a single symbol.
Weather in Czechia
Thursday17 Sep
20°/8°
Friday18 Sep
21°/8°
Saturday19 Sep
21°/10°
Sunday20 Sep
22°/9°
Monday21 Sep
16°/7°
Tuesday22 Sep
15°/5°
Wednesday23 Sep
15°/3°
DAY20°
Cloudy
☀ 06:38 Sunrise☀ 19:10 Sunset
NIGHT8°
Cloudy
18°21°19°16°21°21°21°21°18°21°19°20°20°Archived forecast · 17 September 2026 · This forecast is not updated.
Weather during the day
Partly cloudy to cloudy, with more cloud initially in the southeast and east. Isolated showers were forecast. Daytime highs of 17 to 22°C, around 12°C in the mountains at 1,000 metres. Westerly winds, light and occasionally moderate during the day, up to 5 m/s.
Weather at night
Partly cloudy to mostly clear, with increasing cloud from the west overnight. Mist in Moravia and isolated fog elsewhere. The captured forecast gave lows of 12 to 7°C, around 5°C in valleys.
This is the forecast captured on 17 September 2026. It is preserved for the weather-page demonstration and is not updated.
Weather explained
The same rain can have very different effects on the ground
Intensity, soil conditions and the shape of a catchment influence how quickly water reaches a stream or a street. A daily rainfall total tells only part of the story.
Autumn colour is chemistry made visible
As green chlorophyll breaks down, other pigments become easier to see. The timing and intensity of the display depend on the tree and its environment.