Effect of Temperature on Hemoglobin Dissociation Curve

[sunnitorgman]

Is there a cut off point for the temperature to shift to the curve to the left? For example, if it is cold enough that we start to shiver, would that drive the oxygen-haemoglobin dissociation curve back over to the right because the skeletal muscle has become more active by shivering to keep us warm?

[shaboatrad]

What if the weather is Really hot and this happens in Lungs, Is that why it's difficult to breath in Warm Areas!?!