Verdict: Excellent month
Sapporo Weather in September
September hits the sweet spot in Sapporo — highs around 23°C (73°F), ideal for a full day on foot. Expect showers on roughly 12 days of the month — rarely trip-ruining, worth planning around. Overall, September is one of the best months of the year to be in Sapporo.
Average high
23°C / 73°F
Average low
14°C / 57°F
Rain days
~12
Precipitation
124 mm
What to pack for Sapporo in September
- Summer clothes, plus one light layer for air-con and evenings
- Rain gear is non-negotiable — expect rain on roughly 12 days
- Comfortable walking shoes — every guide on this site assumes you'll use them
September against the rest of the year
Warmest in Sapporo: Jul (26°C / 79°F) · Coolest: Jan (-3°C / 27°F) · Wettest: Feb (~16 rain days)
-3°
-10°
Jan
-2°
-9°
Feb
5°
-4°
Mar
12°
2°
Apr
17°
7°
May
21°
13°
Jun
26°
18°
Jul
26°
19°
Aug
23°
14°
Sep
16°
7°
Oct
9°
1°
Nov
0°
-8°
Dec
Daily highs / lows in °C · bars show rain days per month · ERA5 climate normals (2020–2024)