BBC Weather Centre - Country Guides: Poland: Provides climate and weather information, facts and statistics about the country, along with five-day forecasts for major cities.
NOAA NWS - Poland Weather: US government site provides hour-by-hour weather conditions for the past 24 hours for major cities and locations in the country.
Weather Forecast: 48 Hours Weather Forecast for Poland
Weather Underground - Poland: Displays current conditions for all major cities on one page, with five-day forecast and more detailed information for each available.
Weather.com - Poland: City-by-city weather reports and forecasts.
WeatherHub - Poland: Links to forecasts for cities and airports from various weather sources.