What does "CLR" indicate in a TAF report?

In TAF reports, the term "CLR" signifies clear skies, meaning there are no significant clouds present that would affect flying conditions. This descriptor indicates that the sky is largely free of obstructions, providing excellent visibility for pilots. Clear skies contribute to favorable weather conditions for aviation, indicating that there are no clouds below a prescribed height, typically above 5,000 feet.

While other options describe important aspects of weather, they do not correspond to the specific meaning of "CLR." For instance, "cloudy skies" would refer to the presence of clouds that could obscure visibility, while "calm winds" relates to wind conditions and "cool temperatures" pertains to the ambient temperature without directly addressing cloud cover. Thus, understanding that "CLR" denotes clear skies is crucial for interpreting TAF reports correctly and assessing flight safety.