Terrible weather

The weather is terrible in August, sometimes it is raining ,sometimes it is sunny and sometimes it is windy.
=ok


The weather is terrible in August, sometimes it is raining othertimes it is sunny and sometimes it is windy.
=good

The , use 2/3 times. Then use and for the last word.

example:
I like apples, pears, bananas. =ok
I like apples, pears and bananas. =good

I like apples, pears, bananas, plums and oranges.

Well done!