Yahoo! Weather - Czech Republic

Current day and 5 day weather forecasts for locations around the country.
http://weather.yahoo.com/regional/EZXX.html

AccuWeather.com - Czech Republic

5-day weather forecasts, maps, radar and satellite images for cities and towns across the country.
http://www.accuweather.com/adcbin/intlocal_index?reg=EU%3BEUROPE&cntry=EU%3BCZ

Czech Hydrometeorological Institute

Information about atmospheric conditions with links to research projects and environmental agencies. Headings in English but detail of content is only in Czech.
http://www.chmi.cz/indexe.html