The most popular time to visit St. Petersburg is June, when the city comes alive with the vibrant colors of summer and the famous White Nights phenomenon. During this peak season, from late May to early August, temperatures typically range from the mid-60s to low 70s Fahrenheit. This pleasant weather encourages leisurely strolls along the Neva River and exploration of the city's stunning architecture, including the iconic Hermitage Museum and the Church of the Savior on Blood.
As you delve into the heart of St. Petersburg during these months, you'll find a bustling atmosphere filled with cultural events, outdoor festivals, and extended daylight hours, which create a magical ambiance for sightseeing. The long summer days, with the sun barely setting, offer ample time for activities such as boat tours, visits to the famous Peterhof Gardens, and open-air concerts.
For travelers who appreciate a more serene experience, consider visiting in September. This month often brings a slight dip in tourist crowds while still offering pleasant weather and the chance to enjoy the city's attractions at a more leisurely pace. You can savor the local cuisine in cozy restaurants or take in a performance at one of St. Petersburg's renowned theaters without the hustle and bustle of peak season.