A free app for Android, by MeteoSauzana.

The app contains forecasts for the most important cities in Romania:

Bucuresti, Iasi, Cluj-napoca, Timisoara, Constanta, Craiova, Galati, Brasov, Ploiesti, Braila, Oradea, Bacau, Arad, Pitesti, Sibiu, Targu-mures, Baia mare, Buzau, Satu mare, Botosani, Slatina, Hunedoara, Vaslui, Calarasi, Giurgiu, Roman, Deva, Barlad, Alba iulia, Zalau, Sfantu gheorghe, Turda, Medias, Slobozia, Onesti, Alexandria, Petrosani, Lugoj, Medgidia, Pascani, Tecuci, Miercurea-ciuc, Sighetu marmatiei, Mangalia, Campina, Ramnicu sarat, Dej, Campulung, Odorheiu secuiesc, Reghin, Mioveni, Fagaras, Caracal, Fetesti, Curtea de arges, Navodari, Sighisoara, Rosiori de vede, Dorohoi, Lupeni, Turnu magurele, Sacele, Voluntari, Falticeni, Vulcan, Husi, Aiud, Caransebes, Radauti, Sebes, Oltenita, Borsa, Campia turzii, Tarnaveni, Cugir, Targu-neamt, Corabia, Targu secuiesc, Buftea, Campulung moldovenesc, Bailesti, Baicoi, Gheorgheni, Buhusi, Cernavoda, Calafat, Filiasi, Breaza, Salonta, Adjud, Ludus, Marghita, Urziceni, Bocsa, Viseu de sus, Baia-sprie, Brad, Vatra dornei, Pantelimon, Simleu silvaniei, Gura humorului, Toplita, Mizil, Cisnadie, Gaesti, Ocna mures, Zimnicea, Rasnov, Pucioasa, Po.