Lake Onega is relatively cold, with temperatures below for half of the year and average summer temperatures of about . The catchment area of drains into the lake via 58 rivers and more than 110 tributaries, including the Shuya, Suna, Vodla, Vytegra and Andoma. The only outgoing River Svir, which marks the southern boundary of Karelia, runs from the southwestern shore of Lake Onega to Lake Ladoga and continues as the Neva River to the Gulf of Finland. The White Sea–Baltic Canal runs through the lake from the White Sea to the Baltic Sea. The Volga–Baltic Waterway connects Onega Lake with the
Arkhangelsk Gospel in satisfactory condition - the ink and vermilion has crumbled in places, but the parchment does not have signs of contamination or moisture. The Archangel Gospel was reproduced in 1912 as a facsimile and in 1997 as a scientific publication. The early history of the manuscript and place of its provenance are unknown before 1876. There are some suggestions that it came from the scriptorium of the Lazarevsky monastery near Great Novgorod, but there is no unambiguous evidence to support the hypothesis. In early December 1876 the manuscript was brought to Moscow by a peasant from Arkhangelsk region and was