Het weer in Varna in juni

The frame regulars give is worth having before anything else: this is a very short season, opening in June and finished by mid-September. June itself they describe as warm without being overpowering, mid-twenties with the odd thunderstorm that passes quickly, and evenings cool enough for a sweater at around 15 or 16C - our row says 26.7C by day and 17.7C at night across 56.9mm and 9.1 precipitation days. On the Black Sea they are more cautious than our figures: they put it at 17 to 20C while our monthly average reads 22.8C, so expect the early weeks to be colder than the number. Thirteen hours of sun a day and 15.3 of daylight is the compensation. The record: humidity 77 percent, a 16.1 kph wind and AQI 42.

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.