It's a nice idea, for sure. I'm not sure I'd use it much since other considerations apart from weather also exist. A few things I've noticed: • The search could use some awareness about other names of locations. For example, München cannot be found, Munich can. Tübingen doesn't seem to exist at all (maybe too small). • For people outside the US (yes, they exist) it'd also be nice to have a site-wide switch to metric.…
omg the metric one is so important. it should even be default 8-o
Depends on where most of your audience comes from.