Weather, in strict sense, is any atmospheric condition but as we will take sunny weather as "normal" we wish to see other weather conditions shown in these images, such as rain, snow, wind, storms etc.
Photos of such stuff in the city and with people around is not acceptable for this group - we want to see nature primarily, and although weather conditions are natural in the city too, we don't wish to see cars covered with snow, not rain against the cityscape. nor do we accept people with umbrellas, or playing in the snow for example. Keep that in mind when choosing what to submit in the group.

Sky: Photos of sky and its elements: clouds, stars, Moon, Sun, lightenings, northern/southern lights...
It doesn't have to be only sky in the image, but don't wish to see man made stuff in the image (buildings and antennae are the most common, as are the wires and poles) and also avoid people ind+cludiing their silhouettes unless very far away and not in the front of the image.