Optimum No Rinse is your friend. But, if it is that cold, I don't know if you have any real options unless you can get inside. I use No Rinse in my garage in the winter and it works well.
2014 Corvette Stingray | Torch Red | Z51 | On order...
2012 C63 coupe | Obsidian Black | Performance Package (481hp, 443ft/lbs) | Sold
2011 M3 coupe | Jerez Black | ZCP/DCT | Sold but never forgotten nor will the love affair end
2010 M3 coupe | Alpine White | 6MT | Sold