Locally, the Air Frosts never came, however, the temperature still bottomed out at 1.1c early on Thursday morning. So, with the coldest morning of the Autumn period arriving, although there were no sub-freezing temperatures here, many people would still have been scraping their car windscreens. Why is this? How can ice form on car windows, frosted grass etc. but the thermometer never dipped below 0c (32f).?
A quick search of the internet, informs us of the following, courtesy of the wonderful uk.sci.weather resources website. Here’s hoping this helps?
My evidence from Thursday is clearly shown by my Davis Weather Station plot and how we narrowly avoided an Air Frost.