Siemens Velaro RUS Sapsan, Moscow, St. Petersburg

The average daily temperature in July is 22 °C (72 °F); maximum about 37 °C (99 °F) occurred during the 2010 Northern Hemisphere summer heat wave. A winter minimum of −35.9 °C (−33 °F) was recorded in 1883. The average annual temperature is +5.4 °C (42 °F). The River Neva within the city limits usually freezes up in November–December and break-up occurs in April. From December to March there are 123 days average with snow cover, which reaches the average of 24 cm (9 in) by February. The frost-free period in the city lasts on average for about 135 days. The city has a climate slightly warmer than its suburbs. Weather conditions are quite variable all year round.
Average annual precipitation varies across the city, averaging 600 mm (24 in) per year and reaching maximum in late summer. Soil moisture is almost always high because of lower evapotranspiration due to the cool climate. Air humidity is 78% on average, while overcast is 165 days a year on average.
• Toponymy
The first and fairly rich chapter of the history of the local toponymy is the story of the own name of the city itself. The name day of Peter I falls on June, 29 when the Russian Orthodox Church observes the memory of Saint Apostles Peter and Paul. The consecration of the small wooden church in their names (its construction began simultaneously with the citadel) made them the heavenly patrons of the Peter and Paul Fortress, while St. Peter at the same time became the eponym of the whole city.