Cetol in colder weather?

Those of you who are hopelessly varnished, please disregard.

I use Cetol because it's easy and cheap and, more importantly, it's not very particular about weather.  That being said, I wish Cetol would tolerate less than a minimum of 10 degress C.  Does anyone know what happens if the temp drops below 10C before the Cetol dries?  Is there a way to make Cetol work better and colder temperatures?