Does the weather affects the moods of the people?  

Yes weather affects mood.There is a diease called SAD- season affected disorder, in which the person feels sick and worse during winter days but I haven't heard about SAD in summer days.

Yes I believe the weather definitely changes ones mood. I hate it when the sun is not shining it gets me feeling a bit depressed. I love the sun shining and a nice calm day. These types of days makes me feel alive and want to be active all day. When the sun is not shining I want to crawl into bed and sleep, read or watch movies. If the sun is not shining and its cold on top of it, its worse for me.

certainly, imagine an office with soaring temperature and crowded people rushing in for complaints, usually people will easily loss their temper on hot temperature because it makes them uncomfortable.

colder weather makes you somewhat relax and hold patience longer.

As a person above said, there is such a disease called SAD which generally relates to being more depressed in the winter months compared to the summer. However I do notice that when I am in extremely hot place, it feels like my blood is boiling and I become more agitated. Not everyone does but your body obviously can't stand much heat.

I think weather has an effect on the mood. Whenever it's hot, i find people are grumpy. Whenever it's fair, people are on the mood to have fun. When it's cold people are snugly and all. :)

Most probably, and especially when it's raining. When it starts to rain, it just becomes sadder. When it's sunny, the exact opposite happens...

Of course people are different in warmer places and in colder places. Here in Finland for example, we have are quite good with technology (Nokia, KONE, Linux-> made by Linus) because we had always to do more work for keeping warm than in warmer places. Of course this is only a theory of mine, and I am not at all saying that we are better than anyone else (even if I think so xD)

yes in this hot summer the people can be very harsh but in the too cool weather people can be same rude to others

I am very affected by weather changes
When it is could ...can not think fast
Now in my country is a very bad year... weather change every two hours
It`s awful:(