[GlassStarz]

Here are a few thing I do our weather is often below zero
1. Frozen turn heat on in car not defroster the defrost will bring the glass up fast often causing a crack out warming it with the heater will give it a slower and more even heat at the same time place a big terry towel over the chip area it will help insulate the break area so the glass isnt warm inside and cold outside which ofen will cause a crackout repair as normal (if its really cold use less pressure taking a little longer to fill the break to avoid crackout)
2. Crap falling out of the sky I dont work in heavy snow or rain but when it is coming down I will use the same as 1. but protect the break with a plastic sheet (your suction cuped orange uv cover works well) also something above the break like a rolled towel will keep the moisture from running down into the break area
3. take the day off (this is my favorite technique)