We have updated our history weather API and it has become better. Now we have much more data, filled some gaps, and our VANE platform is able to process it faster. Data is available per 1-hour time steps. You that you can get history API for more than 30 000 cities!
You can subscribe to our history weather API here http://openweathermap.org/price. Should you have any questions, don’t hesitate to contact us and provide your feedback here https://openweathermap.desk.com/