Hasn't the weather been lovely and sunny? This year, February 12th was hotter than it has been since people first recorded temperature. It reached 18'C in some parts of Britain, which is hotter than it often is in the summer!
You can record the highest and lowest temperature of each day by using a maximum and minimum thermometer. It might have been nice and warm in the daytime on the 12th, just as it is today, but because the sky is so lovely and clear, without a cloud to be seen, the night time is very cold indeed. Usually heat rises, but clouds, made from timy droplets of water, insulate the earth, by trapping the heat that the sun has made during the day. When there are no clouds, the sun's heat will rise in to the sky as soon as the sun sets, there are no clouds to keep it close to earth. This means that cloudy nights are usually warmer than clear ones.
Scientists think that our climate is changing - not just in Britain, but all over the world. Our warm February could be a sign that the world is getting just a little bit warmer.
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