It is not raining
This might seem a somewhat banal observation, but it came from Facebook a bit over a year ago from a friend and I remember the context was very important!
I think the little “~” at the end indicates some implication of the stated fact. This is not formal Japanese language, but more of a stylistic tic I have noticed many 日本人 use to emphasise the significance of a statement, especially on social media.
In this case, I believe it emphasised the fact that my friend could play baseball that day, as rain had been forecast and would have stopped them playing, but…good news: no rain!
Perhaps I am reading too much into the “~” but I see it here and there and it always seems to have that meaning!