Manchester United claimed the top spot and both sides had a chance to finish in second, making this a playoff.
England referee Anthony Taylor initially delayed the start of the game by 20 minutes, while an orange ball was introduced and red lines were drawn across the pitch to stand out against the snow.
However, with the snow not falling, Taylor has no choice but to postpone the game at Gewiss Stadium until Thursday, December 9 at 6pm GMT (1pm ET).
Victory for Atalanta was enough to send the Italian side through to the next round, while any other result would see Villarreal pass.
Young boys‘draw with United at Old Trafford in another match of the group secured Atalanta a place in the Europa League. If the Swiss side wins, Atalanta will need at least one draw to secure third place.
Villarreal qualified for the Europa League as Europa League winners while Atalanta are competing for a third consecutive season, having reached the knockout stages in the previous two.
https://www.espn.com/soccer/atalanta/story/4542729/champions-league-crucial-atalanta-villarreal-tie-postponed-due-to-snow Important Atalanta-Villarreal draw postponed due to snow