Rotoworld:
Peyton Manning is 3-7 in career games where the game-time temperature was 32 degrees or colder.
That record includes both regular season and playoff games. In those contests, he's thrown 11 touchdowns against 12 interceptions with a 59.4 completion percentage and 214.1 yards per game. Obviously, those numbers are drastically below his normal output. The forecast for Sunday's home game against the Titans calls for 16 degree temperatures and a 30 percent chance of snow.
Source: ESPN.com
I hate statements like this. correlation <> causation.
Consider that each and every game Manning played in sub-freezing temp prior to 2012 was on the road, and likely in the playoffs (road game in playoffs means you are up against a better team)... conditions where one might expect below average performance.
Peyton Manning has had exactly 1 home game where the kick-off temperature was 32 or less: last years playoff game, where Manning had a 65% completion, 290 yards, 3 TD's and 2 ints. I suppose you could consider a 35 degree game last year on 12/30 - 79.3% completion rate, 304 yards, 3 TD, 0 ints. These two games are the only examples of Manning playing at home in the cold.
Now, i'm not saying that cold doesn't affect him - I believe it does, however it's more of an issue of the cold weather affects his nerve more than warm weather does. This is a pretty well discussed side effect of the nerve issue.
it's more of a pet peeve of mine. It's bad statistics to use Mannings struggles against better teams in the playoffs as some sort of proof that he isn't good in the cold, even if the eventual conclusion may be correct.