Judging by mountain-forecast.com, your best day this week will be Saturday or Sunday night. http://www.mountain-forecast.com/peaks/ ... casts/5897
I'll be flying into Quito Sunday... Cotopaxi and Chimborazo sometime around Feb 8... keep me posted on conditions! (even though they can change day by day). Are you a certified mountain guide? They're required now in Ecuador.. even as early as last year it was only strongly recommended and loosely required for Chimborazo, but I hear that the park people have been strictly enforcing the new rules, even when offered a bribe.