Cloud cover during the day can affect temperatures by reflecting some of the radiation back to the surface, reducing heat transfer into the atmosphere and blocking direct sunlight, resulting in cooler temperatures.
Cloud cover during the day can affect temperatures due to the reflection and absorption of sunlight. Clouds have lower emissivity than land or water surfaces, which means they reflect some of the radiation back to the surface, reducing heat transfer into the atmosphere.
This can result in lower temperatures compared to a clear sky. Additionally, clouds can block the direct sunlight, reducing the amount of heat reaching the surface and resulting in cooler temperatures.