If our bodies are around 100 degress F...

[MAME]

Why does a 100 degree day feel hot?

 

[Sukhoi]

Because our bodies aren't 100% efficient.

 

[Safeway]

Because solar heat gain, the heat radiating from the asphalt, ...

100F days are normally in the middle of the summer, which is not known to be particularly windy. Thus, your sweat is not evaporated at a high rate.

Or, if it is particularly humid, the air is already saturated, and your sweat will not evaporate.

 

[loup garou]

The better question would've been why are we hot on 90 degree days, when it's below our body temp?

*watches MAME's head explode*

 

[SlitheryDee]

Cuz we're not lizards.

 

[BD2003]

We create our own heat (mostly from movement) in addition to the heat from the ambient air, which has to escape somehow, or our proteins denature and we die. On a 90F day, we can't move around all too much without risking overheating, and that heat builds up FAST when theres no cooler air to transfer our body heat to.

Its the same reason you sweat during a hard workout even in a well air conditioned gym. It might be 68F outside, but its getting way too hot inside your body, and its decided to do something about it.

 

[Kelemvor]

Your internal temperature is 98 deegrees. Your skin is not. Your body is designed to cool itself to keep a steady temperature. WHen it's too hto outside it can't cool itself off fast enough and you r internal temp rises too far.

 

[Jeff7]

Your CPU might be around 55C. Put it in a case that's 55C. The processor will overheat.

Originally posted by: BD2003
We create our own heat (mostly from movement) in addition to the heat from the ambient air, which has to escape somehow, or our proteins denature and we die. On a 90F day, we can't move around all too much without risking overheating, and that heat builds up FAST when theres no cooler air to transfer our body heat to.

Its the same reason you sweat during a hard workout even in a well air conditioned gym. It might be 68F outside, but its getting way too hot inside your body, and its decided to do something about it.

And it's part of the same reason why 70F air feels reasonably comfortable, but that same temperature of water will feel cold when you step in. Or put your arm against a piece of metal that's 70F. The water and metal will just suck the heat away from you a lot quicker, so they feel colder than the air.

 

[Bateluer]

Since when is 100 F hot? Thats kinda nice, good swimming weather, good running weather. Just be sure to drink plenty of water.

My blood has really thinned out since I've been living in PHX, my family back in Michigan thinks 75 is too warm.

 

[Leros]

How come when we're inside 75 can be hot and 70 can be perfect, but when we're outside we can hardly tell the difference?

 

[Kelvrick]

Originally posted by: Leros
How come when we're inside 75 can be hot and 70 can be perfect, but when we're outside we can hardly tell the difference?

Probably air flow.

 

[Jeff7]

Originally posted by: Leros
How come when we're inside 75 can be hot and 70 can be perfect, but when we're outside we can hardly tell the difference?

When you're inside, you're probably not moving around as much as when you're outside.

Inside, I like it right around 77F in the winter, and maybe a bit cooler in the summer, down to maybe 72F. Very narrow range for me.
Much below the range, and my fingers and toes start to get cold and then numb; above that, I feel warm, and if I move much, I start to sweat and feel excessively hot. These ranges get really skewed though if it's humid. I like air to be "bone dry" as they say.

 

[alkemyst]

Even on a 100 degree day, it's always cool around me.