Bulgaria will experience varied weather conditions. Most of the country is expected to be sunny throughout the day. However, the Rila-Rhodope massif and areas around Western and Central Stara Planina mountain ranges will see developing cumulus and cumulonimbus clouds. These areas are forecast to experience brief showers, thunderstorms, and potential hail. Maximum temperatures were not specified in the provided text. Overall, conditions will be pleasant for much of the nation, with localized storm risks in mountainous regions.