You should also check the instruction booklets that come with the computers. I bought a specialized computer (the pro I think). It clearly stated that it was only rated for temps between 45F and 100F. And it was true. I would go out on days that were 32F and after 2 hours outside, it would finally start reading 40F. I moved onto another computer, the Planet Bike Protege 9.0 at it is very accurate to... at least to the temps I see when I open my Weather Bug and it's reporting the temperature at the local elementry school. Plus I have an old Trek Radar computer that is also very accurate. Both the Trek and the Bike Planet read almost exactly the same thing all the time. The other two I've tried with temperature (the specialized and a vetta) were usually off and gave me wild readings. Plus both of those were also wireless. I have swore off wireless computers.

PBW