Ive worn this in 35 high 40 degree weather. When you pair it with a merino base later, youre set. I love how light weight it is. I feel like its versatile enough for warmer weather. Its been a cold spring so havent been able to test that yet. Not much I dislike about this jacket. Maybe wish the zipper was higher quality. Thats the only criticism I can think of. Would buy again in a heartbeat.