This can be used by the PRO JSON Content Importer Plugin for searching the weather:
For that you need a Shortcode and a JCI-Template.
1. The Shortcode:
[jsoncontentimporterpro id=ID_OF_TEMPLATE httpstatuscodemustbe200=no]
is all you need as Shortcode on a WordPress-Page, – Post or CPT.
“httpstatuscodemustbe200=no” is required, as the API answers with an http-Error when a place can’t be found.
2. The JCI-Template:
There fill these fields: URL:http://api.openweathermap.org/data/2.5/weather?q={%if urlparam.cit %}{{urlparam.cit}}{% else %}München{% endif %}&lang=de&units=metric&APPID=YOUR_API_KEYurlparam4twig:
cittwig:
{% set sea = "" %} {% if urlparam.cit == "" %} {% set sea = "London" %} {% else %} {% set sea = urlparam.cit %} {% endif %}
{% if cod!="200" %} Place not found {% else %}
{{name}}

Windspeed: {{wind.speed}} m/s, Winddirection: {{wind.deg}}
Temperature: {{main.temp}} ℃, feeels like: {{main.feels_like}} ℃
Pressure: {{main.pressure}} hPa, Humidity: {{main.humidity}}% {% endif %}