This script uses PHP, Curl, and Bash to look up current weather conditions and create 7 wifi access points with the data. It's designed to work with weather.gov's XML feeds. Modification to make it work with other data sources should not be too difficult.
https://github.com/RandomArray/wifiweather
Example Output of iw dev wlan0 scan | grep SSID
SSID: >> KMYF Weather: Light Rain Fog
SSID: >> Temp: 58.0 F (14.4 C)
SSID: >> Dewpoint: 55.9 F (13.3 C)
SSID: >> Wind: South at 8.1 MPH
SSID: >> Wind Direction: South
SSID: >> Visibility: 2.00 MI
SSID: >> Relative Humidity: 93%