* Dernier cri means "the latest fashion" or "the ultimate trend."
* Short hair and casual clothing are generally popular and fashionable in the summer months. This is because:
* Comfort: Short hair is cooler in the heat, and casual clothing is often lighter and more breathable.
* Practicality: Summer activities often involve swimming, hiking, or other outdoor pursuits where low-maintenance styles are preferred.
* Relaxed Vibe: Summer is associated with a more laid-back atmosphere, so casual styles fit the mood.
However, fashion trends are constantly evolving. What is considered "dernier cri" can change from year to year. While short hair and casual clothing are often in style for summer, specific styles, cuts, and fabrics within those categories will be more "on-trend" than others.
To make the statement definitively true, you'd need to specify a particular summer year.
In Conclusion
It's a plausible statement, especially in a general sense.