This sound very familiar had it happen to all three of my spectrum kids and the migraine one. Part is barometric pressure and the other I will call school. As far as the weather goes you can force or encourage your child to dress appropriately. They are are the ones who have to come to terms with the scratchy feeling or too warm or cold. You need to remind them they are human and what may be comfortable at home may not be appropriate at school. Once they and you get past the nerd thing it does get better. I have an 11yr that has problem with the least bit of sweat she wears shorts in the rain, wind. When the temp changed to 50 degrees she finally wore pants.

School think about it for a second. They go for about 8hr. there they are asked to constantly conform to rules that is like being in a foreign country. If any one has been around a foreign exchange student they might get the pressures. No wonder our kids come home ready to cry or kick some butt. They are tired, the lat thing a lot want to do is rehash a day that was shear torture.

I recommend sitting down with him on the weekend talk with him get him to tell you what would be fun for him to vent on that is appropriate for both your tolerances after school. I am betting right now he is hitting your buttons and your on his with out even trying. You may have to give this few different approaches cause different days have different stresses for you as well as your son. It can be really enlightening to both sides to have the communication open up. At 6yr does he just know he is different or has he ever been to the IEP. Our kids have been to every single one. I believe if they know what we go through and demonstrate to advocate for them it might make it easier for them. Teachers sometimes get uncomfortable but it is the kid it is for right. What I am getting at is explain on his level if possible why he might be doing what he is doing to himself as well as you. It might surprise you the answer. Give him time to process it might take a day, a week, month or a few minutes. Don't badger just a gentle reminder let him know your interested.
If that don't work ask the Dr.to reconsider. We got the Dr. to give prescriptions for 1-2hrs so the boys could at least concentrate long enough to do home work.

Haha! I remember once cutting my son's hair while he slept!

I've been lucky. Chris' doctor gives him 5mg of Ritalin at 4pm not enough to having him sitting quit
But it mellows him. Ask your doctor to rethink his meds. Concerta and intunive at 7:30 works wonders on Chris.

We have this happen twice a year at the time changes. The weather does not seem to bother the kids much but the time change does.

Often are children are so regimented on routine that anything different throws them off . It generally takes a few weeks for things to calm down and it has taken a bit longer at times. My daughter goes to am all autistic school and the expect it and prepare for it at every time change. There is not much you can do about it unfortunately they just have to work through it . The only thing you can do is try to keep everything else the same

I think the time change has my son all out of sorts this week. Oddly, in January he had great behavior in school. Since then he has been more defiant at home and school. Now that we changed our clocks, he is really getting mouthy, ignoring other kids' personal space, hitting, etc. He is also pulling at his hair in an attempt to pull it out.