One other option, although it will probably cost around $150is to get the WiFi aenometer that works with ambientweather.net .
That service has an IFTTT channel that you can then use to integrate with smartthings.
Here’s one example:
@GSzabados pointed out in another thread that there is also a DTH available for this one:
[RELEASE] Ambient Weather Station: Integration of a Network Connected Ambient Weather Station