What a terrible climate it is in this country!
I think 'it' should be used, but I'm not sure. Please confirm.
'What a terrible smell there is in this room'. Not, 'What a terrible smell it is in this room.'
'It is terribly cold in this room.' Not, 'There is terribly cold in this room.'
Can you see why Clark.
"What a stink there is in this room. It's coming from that cupboard."
What a rotten stinkin' good-for-nothin' day it is today.
Lots of lovely adjectives.
Where does that leave us?
(Think: 'unbounded' , versus 'all pervading, bounded entity'')
There were a few sunny days last month.
When we say 'there+be X (in) Y', Y serves as a container for X. 'A month' can be regarded as a container for 'a few days', but 'today' can't be looked at the same way for 'day', probably, because it is not big enough.
Check out the big brain on Clark!