Climate of St Petersburg
Saint Petersburg has a humid continental climate. Distinct moderating influence of the Baltic Sea cyclones result in warm, humid and short summers and long, cold wet winters.
The average daily temperature in July is 23 °C (73 °F); a maximum temperature of 37.1 °C (98.8 °F) occurred during the 2010 Northern Hemisphere summer heat wave. A winter minimum of −35.9 °C (−32.6 °F) was recorded in 1883. The average annual temperature is 5.8 °C (42.4 °F). The Neva River within the city limits usually freezes up in November–December and break-up occurs in April. From December to March there are 118 days average with snow cover, which reaches an average snow depth of 19 cm (7.5 in) by February. The frost-free period in the city lasts on average for about 135 days. The city has a slightly warmer climate than its suburbs. Weather conditions are quite variable all year round.
Average annual precipitation varies across the city, averaging 660 millimeters (26 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, and there is on average, 165 overcast days per year.
Weather forecast in Saint Petersburg
Saint Petersburg is a major transport hub. It has an extensive system of local roads and railway services, maintains a large public transport system that includes the Saint Petersburg tram and the Saint Petersburg Metro, and is home to a number of riverine services that convey passengers around the city efficiently and in relative comfort.
The city is connected to the rest of Russia and the wider world by a number of federal highways and national and international rail routes. Pulkovo Airport serves the majority of air passengers departing from or arriving to the city.
Roads and public transport
Saint Petersburg has an extensive city-funded network of public transport (buses, trams, trolleybuses) and several hundred routes served by marshrutkas. Buses carry up to three million passengers daily, serving over 250 urban and a number of suburban bus routes. Saint Petersburg Metro underground rapid transit system has 5 lines with 67 stations, connecting all five railway terminals.
Traffic jams are common in the city, because of high daily traffic volumes between the commuter boroughs and the city centre, intercity traffic, and at times excessive snow in winter.
Today, the city is the final destination of a web of intercity and suburban railways, served by five different railway terminals (Baltiysky, Finlyandsky, Ladozhsky, Moskovsky, and Vitebsky).
Saint Petersburg has international railway connections to Helsinki, Finland, Berlin, Germany, and all former republics of the USSR.
In 2009 Russian Railways launched a high speed service on the Moscow-Saint Petersburg route. The new train, known as Sapsan, is a deriative of the popular Siemens Velaro train; various versions of which are already in service in a number of European countries.
Official site of Russian Railways
Saint Petersburg is also served by Pulkovo International Airport and by three smaller commercial and cargo airports in the suburbs. Lappeenranta Airport, which is located near Saint Petersburg in Finnish side of the border, is also popular among Russian travellers.
With two main terminals (one domestic - Pulkovo 1, one international - Pulkovo 2), Pulkovo is widely regarded as one of the larger and more modern airports in the Russian Federation.
There is a regular, 24/7, rapid-bus transit connection (marshrutka) between Pulkovo airport and the city center.
Official site of Pulkovo airport