Just curious if anyone else has experienced this....

My four month old becomes hysterical when she is outside. The sun is not in her face, she's not hot, she's not cold, fed, napped, changed, in my arms, sucking on a paci you name it she does not tolerate being outside. Granted were in a fussy period so hopefully a phase but I feel bad for my toddler when the baby is hysterical for her park visit or going out for ice cream for 45 minutes. Can babies have seasonal allergies? Over stimulated? I thought being outside is supposed to calm them