MeteoTask is a weather plugin for Tasker and Locale compatible apps.
Free version: get current weather information including pressure, humidity, temperature, wind speed, wind direction, sunrise time, sunset e and much more.
Pro version: get forecast in three, six, twelve hours and one, two, three, four, five, six and seven days. In addition you can create profiles using a State selecting the weather condition to trigger your task!
If a fail occurs use "continue task after error" option and then you can check the value of %errmgs variable.
Require Android 4.0.3 and up
Download MeteoTask for Android