by interconnectit on WordPress.org
The ICIT Weather Widget provides a simple way to show a weather forecast on your website.

No Forecast Mode
Weather information is pulled from the OpenWeatherMap API. This plugin adds a widget that can be dropped into any sidebar, can be customised to suit your theme and won’t hit any usage limits.
The widget can be configured as follows:
You can override what gets displayed for the location by filling in the widget’s title text.
For info on how to use the shortcode, check the FAQs.
Multiple shortcodes do not work if they are in the same post, as the data is stored based on the widget ID if displayed in a widget space or the post ID if using the shortcode.
A new shortcode attribute has been added allowing you to add a unique ID to your shortcode which will be used to store data allowing multiple shortcodes per post.
This widget should work in all themes, although some themes styling will mix with the widget leaving bits that look out of place.
IE7 does not support the icons we use for the weather display.
Works in IE8+, Chrome, Firefox, Opera, and Safari.