titacgs

This plugin/widget allows you to insert weather status in your sidebar. It connects to World Weather Online to get weather forecasts. It shows the current temperature, max and min. You can choose the temperature scale, options are celsius and fahrenheit degrees. Also, you can get results from 1 to 5 days.
It has a really simple html markup:
<ul>
<li>For one result</li>
</ul>
22 °C
Min 20 °C
Max 32 °C
<ul>
<li>For more than one, displays current temperature and a table</li>
</ul>
22 °C
 Date 
 Min. 
 Max.
 05/22 
 Min 20 °C 
 Max 32 °C
 05/23 
 Min 23 °C 
 Max 33 °C
You can style it by adding the proper CSS for each id to your style.css file: temp_actual, temp_max, temp_min
<a href="http://blog.titacgs.com.ar/world-weather-plugin-para-wp/" rel="nofollow ugc">Visit the plugin page</a> leave questions/comments/fixes.
Also, if you like this plugin <a href="https://www.paypal.com/cgi-bin/webscr?cmd=_donations&business=QZTRL5AJ35EHG&lc=VE&item_name=World%20Weather%20Plugin&item_number=WP%2dPlugin&currency_code=USD&bn=PP%2dDonationsBF%3abtn_donateCC_LG%2egif%3aNonHosted" rel="nofollow ugc">you can donate some money!</a>

World Weather Widget

This plugin/widget allows you to insert weather status in your sidebar. It connects to World Weather Online to get weather forecasts.

tiempocom

This plugin provides you the daily weather forecast for the locations you choose. 
With no configuration, you will be able to manage widgets and shortcodes with no hassle.
Features:
<ul>
<li>Ability to specify a different language for each widget/shortcode.</li>
<li>Locations all over the world.</li>
<li>Tons of options and configurations including: colors, layouts, formats, and many more.</li>
</ul>
Speed load impact:
<ul>
<li>Only a CSS file will be loaded, no JS on the front-end.</li>
<li>Images are loaded from the tiempo.com static file CDN server.</li>
<li>Internal file caching.</li>
</ul>
Important: In order to mitigate the site speed impact, please make sure to set write permissions to the <code>tiempocom/cache</code> directory. The plugin performs an intelligent expiry time management to ensure you have always the data up to date.
Supported languages:
<ul>
<li>English</li>
<li>Spanish (Spain)</li>
<li>German</li>
<li>Catalan</li>
<li>French</li>
<li>Italian</li>
<li>Portuguese</li>
<li>Euskera</li>
<li>Galician</li>
</ul>

Tiempo.com

Tiempo.com for WordPress. Allows to add weather widgets and shortcodes from the tiempo.com API.

World Weather Widget vs Tiempo.com