I've been using the Heathkit ID-4001 since it came out in the late 70's
and it's still is very accurate after all these years. I love the huge
LED display that can be seen across the room even in bright light.

Granted, it's a very old unit and replacement parts are almost
non-existant anymore, but you might want to do a search on e-bay. Put
the following in the search: heathkit weather

Some of these can be picked up fairly cheap. If nothing else, you can
see a picture of what they look like.