NZstorm wrote:I don't know where Auckland's readings come from, don't think it is the airport.
Wellington City Council had a new temperature reading site specially installed for TV broadcasting, its not out at the airport. They felt the old site was not representative of Wellington's mediterranean climate.
And the Dunedin figures often come from the airport. The airport readings are consistently inaccurate. The sensor there must now be sitting over the bitumen tarmac. The readings get too high on sunny days.
If you want an objective idea of temp. variation in NZ urban areas, you won't find it from the TV1 numbers. They do not quote any daily lows. So if they just quote daytime for Dunedin Airport, which has hotter days and colder nights than the Musselburgh town site, they give a misleading idea right off the bat.
If W'gton values were quoted both day and night for the Kelburn site that would be reasonably fair as it is quite a good representative. Nelson probably gets slightly maligned because the sea breeze cools the airport a little - again, no night temps.
But none of the TV1/3 nonsense should deflect anyone who is serious about understanding NZ climates. The various local bodies are so lacking in objectivity and commonsense that they want to dupe others into thinking that their weather is "better" than it really is, and in their simple-minded world this simply means pumping up the temp. values.
There's a town in northern Queensland (name escapes me now - maybe Tully) which for decades had the highest average rainfall in Australia - it was discovered later that a local had been topping up the raingauge regularly to reduce the competition's chances - cretin!
Even when you get away from temps. comparisons can be odious - Nelson wants to keep its regained title as sunniest town (over Blenheim, the previous holder, even though the difference has always been small anyway) - but it's quite likely that Nelson now has a very favourable exposure for its readings, and Blenheim less so than formerly - both plcaes have had several site shifts.