Dan Mossop

The perfect way to show current conditions and a 3-day forcast in your sidebar, for a location of your choice. Great for travel sites, town or city sites, etc. It looks good, takes up little space and is easy to set up.
The widget uses accurate weather data from World Weather Online.
<h4>About the Weather Widget</h4>
The Weather Widget by Calcatraz is a compact WordPress weather widget for your sidebar. It has a neat, neutral design which fits in with almost any site. For the location of your choice (city, town, coordinates, ip address, etc) it shows the current weather conditions on the left and a 3-day forcast on the right.
The widget can display temperatures in both celcius and fahrenheit scales. It can detects the user’s language and shows the appropriate scale, or use a predefined scale. It also allows the user to switch scales, and remembers their preference.
There are now two styles: the default wide style (260 x 58px), and the new square style (133 x 116px) suitable for narrower sidebars.

Weather Widget by Calcatraz

A simple, compact weather widget which displays current conditions and 3-day forecast for the selected location.

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

Weather Widget by Calcatraz vs Air Quality Plugin