Will I be hot?
Will I be hot in Osaka in December?
Verdict
No — No, comfortable.
Highs cap at 52°F — no heat-management gear needed.
Day vs. night
Day
52°F
Cool
Sweater weather with the option to add a light shell.
Night
39°F
Cold
Cold enough that a hat and gloves become mandatory.
Why
Osaka in December averages highs of 52°F, lows of 39°F, 6 rainy days.
Temperature is comfortable across the day; pack for style and weather resistance, not heat management.
Nearby months
Packing pointers
Best shoes
Breathable shoes & sandals for Osaka in December →