I checked a temp converter - 10C = 50F... not cold for winter but certainly cold for summer!!! We had 2 weeks of temps around 41C (about 105F) which is very hot for St Louis but then last week the night time low was getting around 12C (55F)....
fall is just about here....
we're just glad that the highs will be around 85F (29.4C) because of a cold front coming in.... down side is it will be raining all week - boo! :-))