yearsofweather

Sapporo in September:
warm, rain on many days

Sapporo, Japan · Records from 2006 to 2025. Not a forecast.

Mean high23°Hottest day 31.3° (2010)
Mean low15°Coldest night 5.6° (2013)
Rain days9 days4-17 by year
Rainfall131mmDaylight 13.2 → 11.8 h
Sapporo's 12 months iBest: June, July and September
Trip types Sightseeing on foot Goodmild
Humidity82%4 muggy days
Clear days2 days12 overcast days
Mean wind8 km/hRarely windy
Sunrise / sunset (15th)05:13 / 17:46Daylight 13.2 → 11.8 h

Sapporo in September

The late heat fades and the air turns crisp. Autumn Fest is held in Odori Park in September. Wet days dip slightly from August before starting to climb toward October.

Highs of 23°C and lows of 15°C: short sleeves by day, with mild nights. Rain fell on 9 days of the month on average. Averages hide a lot here: one year saw 4, another 17.

Not every year was typical: 2012 ran 2.5°C warmer than the mean, with highs of 25.6°C.

Typhoons i

3 of the last 20 years had a tropical storm pass within 300 km this month.

  • Fitow (2007), 29 km away tropical storm
  • Jebi (2018), 150 km away tropical storm
  • Kompasu (2010), 151 km away tropical storm
1 2 3 4 5 6 7 38 39 210 11 12

Date by date i

‹ August September 2027 October ›
Sun
Mon
Tue
Wed
Thu
Fri
Sat
Week
1-4rain on 26% of days26° 18°
5-11rain on 34% of days25° 17°
12-18rain on 36% of days23° 15°
19-25rain on 29% of days21° 13°
26-30rain on 28% of days21° 12°

0-5/206-8/209-11/2012-20/20

1-4rain on 26% of days26° 18°
5-11rain on 34% of days25° 17°
12-18rain on 36% of days23° 15°
19-25rain on 29% of days21° 13°
26-30rain on 28% of days21° 12°
Tap another date to change

20062mm
200759mm
20083mm
200913mm
201022mm
20113mm
2012none
20131mm
20142mm
2015none
2016none
2017none
20184mm
201911mm
2020none
2021none
2022none
2023none
2024none
202522mm
Holidays in September (2027)
  • September 18 to September 20 Respect for the Aged Day long weekend
  • September 23 Autumnal Equinox Day
  • September 6 Labor Day

1 Local public holiday or break (busier, pricier)1 US holidays (flights fill up)

Day by day temperature i

10°18°25°33° 1815222930

Mean high Mean low Coldest to warmest high in 20 years

Your trip dates, the past 20 years

Trip dates ~

You can also click two dates on the axis. Hover a cell to see that day's rain.
Trip rain days Month rain days
2006
3 d 9 d
2007
4 d 13 d
2008
1 d 4 d
2009
3 d 8 d
2010
2 d 7 d
2011
5 d 17 d
2012
4 d 10 d
2013
2 d 12 d
2014
5 d 12 d
2015
0 d 12 d
2016
4 d 10 d
2017
1 d 10 d
2018
2 d 8 d
2019
3 d 7 d
2020
3 d 14 d
2021
0 d 5 d
2022
0 d 5 d
2023
2 d 11 d
2024
1 d 5 d
2025
2 d 8 d
Years with rain
Tap a date to start, tap another to end. Each cell is that date in one year.
'06'07'08'09'10'11'12'13'14'15'16'17'18'19'20'21'22'23'24'25
of 20
4
4
6
7
8
8
11
2
5
7
6
7
5
6
8
6
7
11
7
5
5
5
8
5
6
1
6
9
5
7
Rain days on trip
34132542504123300212

No rain1-9 mm10 mm or more Dates outside your trip are dimmed.

One row per year, one cell per day. 2008 had 4 rain days, 2011 had 17.

Sapporo through the year

MonthHighLowRain daysRainfall
January 0°−6°20 days110mm
February 1°−6°20 days104mm
March 5°−2°16 days89mm
April 12°4°10 days62mm
May 18°9°9 days53mm
JuneGood 22°14°8 days76mm
JulyGood 26°18°7 days88mm
August 27°19°10 days120mm
SeptemberGood 23°15°9 days131mm
October 17°8°12 days121mm
November 9°2°16 days134mm
December 2°−4°20 days129mm

Common questions

Does it rain a lot in Sapporo in September?

Over the past 20 years September averaged 9 rain days (1 mm or more) out of 30. Individual years ran from 4 in the driest to 17 in the wettest.

What should I wear in Sapporo in September?

Days averaged 23°C and nights 15°C. Pack a compact umbrella, a waterproof jacket, a light layer for the evenings, and T-shirts.

Is September a good time to visit Sapporo?

On warmth and rain days alone, Sapporo's easiest months were June, July and September. September ranked 2 of 12, close to the top.

Is Sapporo humid in September?

Mean relative humidity was 82%, with about 4 muggy days (dew point of 20°C or more) in the month.