How much do you want to spend? A lot of users on here like the Panasonic BL-C140, there are many threads about it in this section, like this one, not expensive, robust and easy to install and get working, but it’s only 640x480. Beyond that Axis cams are popular but more expensive, or Canon cams which are very nice but not surprisingly expensive. If you search this Weather Photography section for those brands you’ll find plenty of info.