Things that evoke the feeling of early spring are called primaveral. A lot of people have things that remind them of spring, like being able to wear lightweight clothing or spotting the very first daffodils peeking through the soil.
The etymology of the word primaveral traces back to two Latin roots: primus, meaning "first," and ver, meaning "spring." In many Romance languages, primavera became the standard word for the spring season. In English, the word primaveral emerged in the 1800s as a poetic way to describe anything relating to, reminiscent of, or occurring in spring's earliest moments: a primaveral thaw; a crisp, primaveral breeze; or budding, primaveral leaves on trees.