Cold air will arrive from the northwest this evening. Tonight and all day Tuesday will be cold everywhere. On Tuesday rain will fall in many parts of eastern Bulgaria, and in places it will be heavy.

Fog will form in many lowland areas before noon. Along the Black Sea coast the cloud will be low and visibility poor in places. Around midday the cloud over the sea will briefly break up and thin out, and light rain may fall in places along the northern coast.

There will be almost no wind at sea in the morning. A light easterly will pick up in the afternoon, then turn northwesterly and strengthen towards evening. Elsewhere it will be almost calm. Around midday the wind will shift to west-northwest, and in the afternoon it will be moderate in the Danube plain and the Upper Thracian lowland.

In the west, cloud will build and rain will fall in places.

Lows today will be 3C to 8C, with about 5C in Sofia. Highs will reach 13C to 18C, and up to 21C in the east and the far south. Sofia will see about 14C.

The mountains will be cloudy, with a west-northwest wind that will be moderate and briefly strong. In the afternoon rain will fall in the mountains of western Bulgaria, and snow above 2,400 metres. The high will be about 16C at 1,200 metres and about 8C at 2,000 metres.

It will stay windy on Tuesday, though the wind will ease gradually, mostly in the west. It will often be very cloudy. Later in the day the rain will stop in the southeast, while it will rain in central northern Bulgaria.

On Wednesday there will be showers in places, mainly in the north. Lows will mostly be 5C to 10C, and highs 10C to 15C.

Thursday will be mostly cloudy, with almost no rain. The wind will blow from the northwest, light to moderate. Later in the east it will turn north-northeast and strengthen.

Friday will be mostly cloudy, and the wind will drop. Rain is expected mainly in the west.