Verdict: Fair month
Osaka Weather in January
January is properly cold in Osaka, with highs of only 9°C (48°F). Rain is occasional — about 7 wet days in a typical year. January is workable in Osaka if your dates are fixed — just plan around the conditions.
Average high
9°C / 48°F
Average low
1°C / 34°F
Rain days
~7
Precipitation
53 mm
What to pack for Osaka in January
- A proper warm jacket, and a hat for mornings
- A packable rain shell or compact umbrella earns its space
- Comfortable walking shoes — every guide on this site assumes you'll use them
January against the rest of the year
Warmest in Osaka: Aug (33°C / 91°F) · Coolest: Jan (9°C / 48°F) · Wettest: Jul (~17 rain days)
9°
1°
Jan
11°
2°
Feb
15°
5°
Mar
19°
10°
Apr
23°
14°
May
27°
19°
Jun
31°
24°
Jul
33°
26°
Aug
30°
23°
Sep
23°
14°
Oct
18°
9°
Nov
11°
3°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)