The temperature change outdoors is detectable, but brief. Also, buildings even the effect out, due to mass and retained heat. https://sunearthday.nasa.gov/2006

The temperature change outdoors is detectable, but brief. Also, buildings even the effect out, due to mass and retained heat. https://sunearthday.nasa.gov/2006/faq.php https://sunearthday.nasa.gov/2006/faq.php "Typically, how big a temperature drop do you get during a total solar eclipse? It would probably be equal to the typical daytime minus nighttime temperature difference at that time of year and location on the Earth. It would be modified a bit by the fact that it only lasts a few minutes, which means the environment would not have had much time to thermally respond to its lowest temperature, so it would probably only be 3/4 or 1/2 the maximum day-night temperature difference."