In case anyone wants to check the weather along a route this is the site I use. It's the best I have found so far.
The site I used to use was just a start and finish map. On this one you can add waypoints (I don't know how many).
https://morecast.com/en/plan-your-route#
On that site, I have to fill out my credit card details ? On top of that page (of some Columbian domain), there's a mention : (translated) "Your creditcard won't be charged for the free subscription". But worryingly, at the bottom of that same page, there's a checkbox (automatically checked !) with a (very small print) clause which, translated, states : "Yes, I want an extra games subscription package with a 14-day trial subscription for 1.95€, which automatically extends thereafter into a full monthly renewed subscription for 4.95€, unless you cancel it. I accept the conditions of the games bundle".
OK, you can uncheck that checkbox, but what the f.ck