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

gardainformatica

giWeather is a WordPress widget (and block for new themes) that shows the weather forecast with a clean, clear and responsive style inspired by Google.
<a href="https://giweather.gardainformatica.it/wp-demo/" title="giWeather Demo Site" rel="nofollow ugc">giWeather Demo Site</a>
Features:
<ul>
<li>Possibility to choose the source of weather forecast between OpenWeatherMap (Worldwide) and National Weather Service weather.gov (USA only)</li>
<li>Endless colors. Possibility to choose the color of the weather module with a simple color picker; </li>
<li>Unit of Measure support: Imperial/British and Metric/International;</li>
<li>TimeZone support: possibility to choose the time zone of the weather forecast;</li>
<li>Font Size selection: Small, Medium, Large;</li>
<li>Many iconset (from near reality to flat icon): Iconvault Forecast (font), Meteocons (font/img) dark and light, gk4 (img), OpenWeatherMap (img, external), Google (img, external);</li>
<li>Deferred load of module in order to speed up website loading;</li>
<li>Data cache for faster loading and reduce the demands on the forecast source;</li>
<li>Fully responsive – will adapt to any device;</li>
<li>Advanced touch / swipe support built-in;</li>
<li>Wind icons with intensity and direction;</li>
<li>Possibility to choose the time horizon of the forecast;</li>
<li>Possibility to show or hide the detail sections of the module: Locality, Date, Descriptive weather, Humidity , Pressure , Wind, Thumbnails Forecasts;</li>
<li>Multilanguage forecast descriptive text support (OpenWeatherMap): English, Russian, Italian, Spanish, Ukrainian, German, Portuguese, Romanian, Polish, Finnish, Dutch, French, Bulgarian, Swedish, Chinese Traditional, Chinese Simplified, Turkish, Croatian, Catalan;</li>
<li>Browser support: Firefox, Chrome, Safari, iOS, Android, IE.</li>
<li>Highly customizable with CSS;</li>
</ul>
For more information visit the giWeather home page at: https://giweather.gardainformatica.it/

giWeather

https://plugins.trac.wordpress.org/browser/giweather/trunk/extras/mod_giweather/mod_giweather.php#L98

The function "gw_load_icons_fonts_path()" is misleading, it is hidden inside a dynamically loaded ZIP, so that you can't find it, and it actually doesn't load any paths, it just displays the copyright, which is only hidden via JavaScript otherwise...

https://plugins.trac.wordpress.org/browser/giweather/trunk/extras/lib_giweather/language

The ZIP is hidden inside a language folder... which is just more effort to disguise the copyright text.

This is at least bad practice... if not worse.

Disguised Copyright

giWeather is a Wordpress widget (and block for new themes) that shows the weather forecast with a clean, clear and responsive style inspired by Google …

spWeather vs giWeather