SebastianK

This Plugin is very easy to handle. Just install with a few clicks and set it up in your configs. 
Then include it in your sidebar e.g. with the following code:
< ?php spWeatherShow(); ? > (without spaces)

spWeather

This Plugin gets the weather from google.de/google.com and shows the weather now and a 4 days forecast with tiny pics

hullcode

Weather Widget Pro is a flexible and easy-to-use weather plugin that allows you to display a beautiful weather widget in your site without any coding skills.
Create a widget, select your location over 200,000 available aroud the world, choose the data and customize the look and feel with a few clicks.
<h4>KEY FEATURES</h4>
<ul>
<li>Fully responsive & mobile friendly.</li>
<li>Easy to use – No coding required</li>
<li>Display weather for 200,000 locations around the world.</li>
<li>Shortcodes</li>
<li>Current weather with temperature, humidity, wind, pressure, cloudiness and sunrise/sunset</li>
<li>Up to 14 days weather forecast with temperature, wind and rain probability.</li>
<li>Compatible with metric and imperial units.</li>
<li>Fully customizable. You can show or hide every element.</li>
<li>Widget can be styled individually. Choose font color, background, etc.</li>
<li>Translatable .pot file.</li>
<li>Supports WordPress multisite</li>
<li>Compatible with any theme.</li>
<li>All major browsers are supported.</li>
</ul>
Weather Widget Pro is a service provided by <a href="https://weatherin.org/" rel="nofollow ugc">weatherin.org</a> and <a href="https://eltiempoen.com/" rel="nofollow ugc">eltiempoen.com</a>

Weather Widget Pro

Best weather plug in

Weather Widget Pro provides a complete weather forecast for any location around the world.

spWeather vs Weather Widget Pro