This site from Sweden suggests the best suitable outdoor jacket based on your local weather forecast. Depending on the weather conditions in the city, you get a different recommendations on the jacket you should wear during your next destination. The site track your IP address and connect to a weather forecast service and match the product database accordingly.
The site suggested “No Jacket Needed” to me tracking my Indian IP, the city where I am located, which have 27 degree temperature on today. 
I hope this site is quite helpful for the frequent travelers.
