"[13] Siberia, like its predecessor, received universal critical acclaim, with a Metacritic score of 81/100 based on 12 reviews.

In a highly positive review, Stuart Berman of Pitchfork noted that the band's "subtle classic-rock quotes—like the “Tom Sawyer”-worthy arpeggio that underpins the tranquil “Changed”—serve to make Polvo’s complex guitarchitecture more inviting to the uninitiated" & praised "Ash Bowie and Dave Brylawski’s more emotionally revelatory approach to their vocals."

Fred Thomas of AllMusic called the album "a step up from Polvo's original return to the scene.

Though the songs here would have fit in with the best of their earlier phases, they manage to inject deeper subtleties and emotional crosscurrents than even their best work from the '90s without getting too soft in the process."

[15] Pharaoh Overlord picked the track "Total Immersion" as one of their favorites, calling it "[p]erfectly twisted progressive pop music.