Climate change is quite remarkable nowadays, in places where it usually snowed, it no longer snows like a few decades ago, or places that used to be warm in certain months of the year, because now they are rather cold.
I believe that part of this may be due to human action, which has been increasing pollution levels since the 18th century in an accelerated manner, although by the last decades of the 20th century, alarm voices had been raised and the issue of "Global Warming" was ceasing to be a subject only for academics to be known to the general population, which has given impetus to environmental policies and conservation movements that try to reduce the impact of human factors on global ecology.
I really don't know if a few weeks of low activity can cause big changes in the long term, but seeing the maps of CO2 pollution that other colleagues have shared, I can suspect that at least in the short term the change is quite noticeable.