Hottest (avg)
#3 / 12
Sapporo in September
September weather, climate averages, and packing tips.
Avg High
Avg Low
Rain
Daylight 13h
What to expect
September marks a typically mild period of autumn, where temperatures are dropping quickly. Thermometers typically reach 21°C / 70°F, with evenings cooling to 14°C / 57°F.
Skies are often overcast, and you should be prepared for regular rainfall (approx. 16 wet days).
September in context
How it compares to the rest of the year in Sapporo.
Wettest (avg)
#2 / 12
Daylight Hours
#6 / 12
Windiest (avg)
#9 / 12
Highest UV
#6 / 12
Most Humid
#4 / 12
Temperature
- Daytime high
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- Nighttime low
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- Feels like (avg)
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Sunshine
- Daylight
- 12.5 hours
- UV index (max)
- 6
- Typical sun hours
- 05:13 – 17:44
Rain & Snow
- Total
-
- Rainy days
- 16
- Cloud cover
- 63%
- Snowfall
-
Humidity & Wind
- Humidity (avg)
- 82%
- Wind (avg)
-
- Wind (max gusts)
-
Frequently asked questions
Is September a good time to visit Sapporo?
Typical September days in Sapporo reach highs of 21°C (70°F) with nights around 14°C (57°F). It usually feels mild by day and cool after dark. It is among the wetter months, so it is wise to have some indoor backup plans or flexible activities.
What are temperatures like in September?
Daytime temperatures in September typically peak near 21°C (70°F), while nights drop to around 14°C (57°F). Expect mild afternoons and cool evenings.
How much does it rain in September?
Rainfall in September averages 138 mm (5.4 in) across roughly 16 days. Overall it is a very wet time of year, so a light rain jacket and waterproof shoes are very handy.
How many hours of daylight are there in September?
You can expect about 13 hours of daylight in September. Sunrise is typically around 05:13 and sunset near 17:44. Daylight is fairly typical, with enough time for sightseeing.
Does the weather change during September?
September usually begins milder and cools down as the month goes on, so late-September can feel more like the next month.
How strong is the sun in September?
UV levels are often high (around 6). Regular sunscreen and a hat are recommended.
Is it windy in September?
In September, average wind speeds are around 12 km/h (7 mph), with gusts on the windiest days reaching about 54 km/h (34 mph). On the ground, it is it can feel quite windy at times, particularly when weather systems move through.