Onești is located in the Tazlău-Cașin Depression of the
Eastern Carpathians at an average altitude of . It lies at the confluence of the rivers
Trotuș,
Cașin,
Oituz, and
Tazlău, some southwest of the county capital,
Bacău. The city is crossed by the
European road E574 and by the national roads DN11A and DN12A that connect it to
Bucharest, to the northern part of the country, and to
Transylvania. Rail connections are made through the
Căile Ferate Române network, and the proposed A13
Brașov–Bacău Motorway will link the city to the rest of Romania's
highway network as a second connection to the country's major cities.
Climate The
climate of Onești is
temperate-continental, with
temperatures ranging from -25
°C (though in recent decades this value is rarely recorded) in
winter to +35
°C in
summer, with an average annual temperature of 9.2
°C, and annual precipitation totaling 654
mm. The most frequent winds blow from the
west and
south-west. The vegetation is specific to the
temperate-continental zone:
conifers,
deciduous trees, and climbing plants, as well as rare plants found in the Perchiu reserve (SCI site), a protected natural area included in the site of community importance - Dealul Perchiu. The highest recorded
temperature is +40.8
°C, on 5 July 1916, and the lowest is -29.6
°C on 25 January 1942. ==Culture==