Looking on the internet deeply has found these results:

Although it was raining, but we had the picnic is the most popular phrase on the web.

I eat finish my ice-cream 10 results on the web	Although it was raining, but we had the picnic 154,000,000 results on the web More popular!
Some examples and use cases from the internet:	Some examples and use cases from the internet:
It doesn't look like this phrase is very popular! The search could not find any examples on the internet.	although it was raining, the capital is always great It has been really difficult, but in the end we managed to shoot most of the shots we need, although it was raining heavily... The crew was great and the childern did a nice job even if the full day was very tiring! Although it was raining, I went out. Although it was raining, but we had the picnic We ate in the restaurant as it was raining heavily and although the food, when it arrived, was good the service was very, very slow. And it was raining very hard... I went out although it was raining. And it was raining, I think.

I eat finish my ice-cream

10 results on the web

Although it was raining, but we had the picnic

154,000,000 results on the web

More popular!

It doesn't look like this phrase is very popular! The search could not find any examples on the internet.

although it was raining, the capital is always great
It has been really difficult, but in the end we managed to shoot most of the shots we need, although it was raining heavily... The crew was great and the childern did a nice job even if the full day was very tiring!
Although it was raining, I went out.
Although it was raining, but we had the picnic
We ate in the restaurant as it was raining heavily and although the food, when it arrived, was good the service was very, very slow.
And it was raining very hard...
I went out although it was raining.
And it was raining, I think.