New acrylic hybrid paints allow for painting in 35 degree freezing weather. But, the air needs to maintain a temperature at or above for 24 hrs. from application. That means the surface temp needs to comply with 35 degrees or more, may not go below that number.The paint must be specific to low temp(35 degree) and shown on label. other acrylic paints are out on the market but can not handle close to freezing. A good rule of thumb is 45 degrees or above, and kept for 24 hours with those regular paints.
  When there is a question regarding temperature, and humidity, always check with paint manufacturer and their data sheet on the product being used.   If I can answer your question regarding this issue, please feel free to contact me at 727-849-8191.  thanks, and keep safe, High regards,  Ken Sisco Painting.