squaredesign

WX Weather displays data from a Personal Weather Station, retrieved from the website <a href="www.wunderground.com" rel="nofollow ugc">Weather Underground</a>.
to use this for your own Weather Station, you need to submit your data to Weather Underground, and you know your Weather Station code. to find out more about how to do this, visit <a href="http://www.wunderground.com/weatherstation/about.asp" rel="nofollow ugc">Weather Underground’s Personal Weather Station Page</a>.
data is cached locally in your WordPress install, so it only makes one request to Weather Underground every five minutes.

WX Weather Widget

WX Weather is a WordPress widget designed to display data from a Personal Weather Station (PWS) in your blog sidebar.

patrol220

Air Quality Plugin shows air quality data from closest detector of localization which you will give in settings of plugin. In plugin settings localization must be provided to determine which detector will be chosen. You can set Google Maps API key in settings to make that thing easier. After giving Google Maps Api key you will get new input field where you can specify your localization. It can be name of the city, but in your city there can be multiple air quality detectors so for more accurate results you should put name of the street. 
Plugin is using waqi.info JSON API to get data about air quality.
In settings administrator have option to let every user to set localization from Settings -> AQP Settings what they want.
Plugin additionaly displays some info about weather from detector if there is any given. You can disable it from administrator options.

Air Quality Plugin

This plugin was made mainly to display air quality from closest air pollution detector

WX Weather Widget vs Air Quality Plugin