Fredsie

Well 1/5 of a degree accuracy would be more than good enough for me! I don't know of any certified stations but if I can get hold of a thermometer that's likely to be right within 0.5 C I'd be happy. It seems from what you're saying I should be able to get either glass or digital kit which will do this fairly easily? Did you have any particular examples in mind?

OK thanks. I understand the issues around the siting of thermometer equipment. In my question I suppose I was putting the issue the other way round: one might ask what's the point of getting an expensive Stevenson screen etc if you can't rely on what the thermometer reads?

Hi I expect this has been discussed before but I can't find anything pertinent via search. I have had a number of thermometers over the years and clearly there is always a bit of variation in what each registers in the same situation. Recently made digital thermometers show a reading to 0.1C but clearly this is very different to having an accuracy to that level. So my question is, how do I really know what the air temperature is in my back yard? Is there some way of obtaining a calibration of a thermometer (so that I at least know what offset to use), or is there a thermometer I can buy that really is this accurate? Cheers Fred