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.

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.

World Weather Widget vs Weather Widget by Calcatraz