Retinol use in summer

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I'm quite new to retinol and enjoying the results. However do ppl use it all year round? I'm an avid factor 50 fan, but managed to get a bit of a glow on my face yesterday. I'm wondering whether the retinol is a factor here and maybe to stop over summer.

A dermatologist I follow says using retinol doesn’t make you more sensitive to sun.
I do use it all year round, I apply at night and always wear spf on my face.
Do you reapply your face spf? If not maybe you would get a glow even without the retinol? we had a lot of sun yesterday, it was too hot to sit in for quite a bit of the day.

Thanks that's helpful. No I didn't reapply and was out gardening so probably had quite a big exposure. Skin seems fine today,will keep going with the retinol and be more mindful of reapplying