Yeah, to me this is the biggest pro-tip if you want to save a ton of money but still want a big traditional wedding: Get married in the winter.
Of course our wedding was in the morning, and later that day there was a story published in several newspapers about a couple that had managed to get married on 11/12/13 at 14:15.
I'm still amazed that didn't occur to me!
Truthfully, the part the guests largely enjoy is the reception (which is often indoors anyway), so it's really not a bad idea at all.