Yes Correct.
I'll suggest to use less viscos oils 0/20, 5/20, 0/30, etc. only from November to February.
Because since March to Mid October, the heat index on roads is pretty much high specially during day time. Continous A/C running in 45'C, oil may not give the thermal stability to the engine and it may increase the heat index of engine.
So in summer, it would be wise to use 5/30 or 5/40 oil for better results.
Feeding 10 weight or more oils (to JDMs) may NOT bring good average either in Summer or in Winter. For example 10/30, 10/40, 15/40, 20/50. But mechanics/shop keepers pouring these heavy oils to these cars and people consider them oil gurus or mentors and blindly follow their advices.