I believe it was around this time last year that I did the Titanium C1 small dish project testing. Temp one day of it was -5F/-20C. Other night I needed stream samples for Amiko and was out at midnight with a portable motorized setup and a flashlight. At least that was around 32/0. You go out when things need to get done regardless of the weather. The only thing I won't do is testing or aiming in the rain or snow since those will skew Ku results.
Tip for anyone that doesn't know: Rain-X will keep snow and freezing rain from sticking to your reflector and LNB arm.
Tip for anyone that doesn't know: Rain-X will keep snow and freezing rain from sticking to your reflector and LNB arm.