There's been some research from my alma mater that it might have had water even that early [1]. I haven't seen good data on the estimated temperature during this time (it was hot certainly, the question would be how frequently were there pockets where hyperthermophiles would be able survive). I like this paper's approach [2] - they end up with a small chance of life before the impact.

[1] https://archive.is/NZwpJ

[2] https://www.liebertpub.com/doi/pdf/10.1089/ast.2005.5.154