Here is a good weather site - metcheck.com. It gives forecasts for the next ten days, I've just had a wee look and in the Glasgow area we are due for frosts, some of them even during the day, so it's set for colder more seasonal conditions here. I'm so glad I took the general advise of other grapes and haven't sown anything yet, I'll sit on my hands for a while longer (well maybe for another couple of weeks).

You never know what's round the corner but this site gives you half a chance.
Happy gardening
Ogilvie