1. Do not have people as the focal point. The image may include people so long as they are not recognizable. In other words, any person in the image must not be the focal point but may be a part of the background.
2. The photo must reflect the state of the weather in the sky, in day or night for any of the following weather conditions:
Clear, Cloudy, Rain, Storm, Fog, Snow
3. Minimum resolution as follows:
Horizontal (landscape orientation): Minimum of 1024 px width x 554 px height
Square: Minimum of 1024 px width x 1024 px height
Vertical (portrait orientation): Minimum of 680 px width x 1024
Images larger than these sizes appear best on our app.
4. No borders, signatures, watermarks, logos, overlaid text or camera time stamps. Photographer attribution will be provided automatically on the image by the Yahoo! Weather app.
5. Images need to be geotagged for city and country. Landmarks are not supported. Be as specific as possible. More info on geotagging is available here