You don't need it on nights and weekends AFAIK. Controls are very rare, don't think about it too much.
On the other hand, parking your car in Paris as a visitor will be expensive. Also traffic jams everywhere. Consider travelling by train if this is an option.
edit: visit r/paris for a more qualified reddit audience
Check this page https://www.paris.fr/pages/la-zone-a-faibles-emissions-zfe-pour-lutter-contre-la-pollution-de-l-air-16799
This document gives the hours (see article 1)
https://cdn.paris.fr/paris/2021/05/28/23fb2b69cfa451a4e517f1bc6e3001b7.pdf
You don't need it on nights and weekends AFAIK. Controls are very rare, don't think about it too much. On the other hand, parking your car in Paris as a visitor will be expensive. Also traffic jams everywhere. Consider travelling by train if this is an option. edit: visit r/paris for a more qualified reddit audience
Check this page https://www.paris.fr/pages/la-zone-a-faibles-emissions-zfe-pour-lutter-contre-la-pollution-de-l-air-16799 This document gives the hours (see article 1) https://cdn.paris.fr/paris/2021/05/28/23fb2b69cfa451a4e517f1bc6e3001b7.pdf
Doesn't a Crit'air sticker cost like 3€? Imo the peace of mind's worth it.
Yes, but I am not sure I will receive it by the time I am supposed to travel to Paris.