Britain played a significant role in the development of Metop, building the service structure and propulsion modules for all three spacecraft, as well as providing MHS (Microwave Humidity Sounder) - an instrument that retrieves important information about humidity in the atmosphere - for Metop and its American counterparts.

BBC: Weather satellites and the gathering storm

Items are now housed in a temperature and humidity-controlled strong-room protected by an inert gas fire protection system, which would douse the room in gas to kill flames instead of using water.

BBC: Carlisle's ?8.2m archive centre opens

If a temperature reading can't account for wind, humidity and even how individuals experience weather, then an average temperature for a city is even more limited.

WSJ: In the Forecast: New Ways to Measure the Temperature