{% if airvalue is none %} Luft: N/A {% else %} Luft: {{ airvalue|round(1) }}°C ({{ airtime.strftime('%Y-%m-%d %H:%M') }}) {% endif %}
Wasser: {{ watervalue|round(1) }}°C ({{ watertime.strftime('%Y-%m-%d %H:%M') }})
Source code, API documentation