It is wintertime, but with temperatures between 0°C and almost 10°C it feels a bit more like we are in early spring rather than midwinter. Normally temperatures would be below minus 5°C at this time of year. What little snow we've had so far this winter, melted soon after it arrived. But with temperatures varying as much as they do, you can find nice frost patterns as the one in this image. These patterns form as the water starts to freeze, in this case from a shallow body of water on top of older ice.