Varna weather in September

September here is a resort taking itself apart as the month goes on. Regulars describe mid to high twenties with thunderstorms that clear fast and rain that stays local - our row gives 25.5C and 25.3mm across 4.8 precipitation days - plus chilly early mornings and evenings at 16.8C. What changes is the town: places north and south of the centre start closing, the clubs and water parks shut, and by late September it is a quiet, cheap, laid-back version of itself with bargains in the shops but much less open. Their rule is to end the trip no later than the third week if the activities matter, and to come late if the quiet does. The record: humidity 69 percent, 10.6 hours of sun, a 24.6C sea and AQI 39.

Forum posters describe January and February as Bulgaria's coldest months, with snow possible enough that some villages can become snowed in, though posters note snow mostly falls in December and January, with conditions starting to warm up noticeably after late February. Posters describe Varna specifically as functioning normally as a big city year-round, but considerably quieter in winter than during its summer and spring peak, since it's primarily a warm-season destination - some posters describe the off-season atmosphere as a bit mundane by comparison. Posters consistently recommend checking wind and weather before packing given the Black Sea coast's exposure. Posters generally rate February as cold and quiet for Varna, workable for a visit focused on the city itself rather than the beach season the destination is known for.

Forum posters call July and August the hottest months in Varna, with daytime temperatures easily topping 30C and evenings settling into the low-to-mid 20sC. The Black Sea itself stays pleasantly warm without getting uncomfortably hot, with posters reporting sea temperatures around 25-27C even as August wears on. A sea breeze is repeatedly credited with making the heat feel more comfortable than the raw temperature numbers suggest, and while brief summer thunderstorms are a real possibility, posters describe them as passing quickly (an hour or two) rather than disrupting a full day. Overall verdict from multiple posters who've visited in late August: hot, but comfortable, with reliably nice beach weather.