Weather of the film

We have decided to film our scenes outside at night time, at 4pm-5pm, this is because the weather then will start to get dark but still a slight amount of light for the camera to pick up.  We have also decided to film soon as we do not want snow or rain to be in our film,  this is because we want the film to be consistent.  In addition, we would like the weather to be cold, this is because as a result of the cold the characters will look cold and fragile, which is the image we want to present to the audience.  This is because the characters should be scared after the experience in Eric's house.