Sapporo weather in September
In September, Sapporo has an average high of 22 °C71 °F and an average low of 14 °C56 °F, with about 137 mm5.4 in of precipitation. It is the 3rd warmest month of the year and ranks 2nd for precipitation.
How September compares with other months
Compared with August, September is 4 °C7.2 °F cooler on average and drier by 23 mm0.9 in. Compared with October, September is 6.8 °C12.2 °F warmer on average and wetter by 18 mm0.7 in. Daylight lasts about 12.4 hours around the middle of the month. Average relative humidity is 85% and the average cloud amount 71%.
Is September a good time to visit Sapporo?
September is not among the most comfortable months by our comfort score: it is fairly wet (137 mm5.4 in). The most comfortable months in Sapporo are June.
What to wear in September
For Sapporo in September, pack light layers — T-shirts plus a light sweater or jacket and an umbrella or light rain jacket.
September in nearby places
| Place | High °C°F | Low °C°F | Precip. mmin |
|---|---|---|---|
| Sapporo | 2271 | 1456 | 1375.4 |
| Tomakomai | 2169 | 1661 | 1435.6 |
| Asahikawa | 2170 | 1355 | 1154.5 |
| Obihiro | 2271 | 1355 | 1325.2 |
| Hakodate | 2271 | 1762 | 1305.1 |
| Kitami | 2170 | 1355 | 1084.2 |
| Kushiro | 2068 | 1457 | 1305.1 |
| Aomori | 2373 | 1763 | 1425.6 |
| Hirosaki | 2475 | 1559 | 1475.8 |
Nearby places that are more than 1 °C1.8 °F warmer in September: Hakodate, Aomori and Hirosaki.
Other months in Sapporo
- January−2 °C28 °F / −8 °C17 °F
- February−2 °C29 °F / −8 °C17 °F
- March2 °C36 °F / −5 °C24 °F
- April9 °C49 °F / 1 °C34 °F
- May17 °C62 °F / 7 °C44 °F
- June21 °C70 °F / 12 °C53 °F
- July25 °C77 °F / 16 °C61 °F
- August26 °C78 °F / 18 °C64 °F
- September22 °C71 °F / 14 °C56 °F
- October15 °C59 °F / 7 °C44 °F
- November7 °C44 °F / 1 °C33 °F
- December0 °C31 °F / −6 °C22 °F
Frequently asked questions
How warm is Sapporo in September?
In September the average high in Sapporo is 22 °C (71 °F) and the average low is 14 °C (56 °F).
Does it rain a lot in Sapporo in September?
On average about 137 mm (5.4 in) of precipitation falls in September; it ranks 2nd of the 12 months.
Is September the warmest month in Sapporo?
No. The warmest month in Sapporo is August, with an average high of 26 °C (78 °F). The coldest month is February, with an average low of -8 °C (17 °F).
How long is the day in Sapporo in September?
In the middle of September the day in Sapporo lasts about 12.4 hours from sunrise to sunset. The value is calculated from the position of the city and the sun.
How humid is Sapporo in September?
The average relative humidity in September is about 85%. This is a long-term average for the whole day.
How cloudy is Sapporo in September?
On average about 71% of the sky is covered by cloud in September. This is the mean cloud amount from satellite data, not the number of sunny days.
About this data
All figures are 25-year averages (January 2001 – December 2025) from the NASA POWER project. Temperature, humidity, wind and precipitation come from the MERRA-2 reanalysis (precipitation is the bias-corrected MERRA-2 product), cloud and solar values from CERES satellite data. They describe a grid cell of roughly 50–70 km, not a single weather station, so they can differ from airport records — most of all on coasts, in mountains and for rainfall. Average highs and lows are the monthly mean temperature plus/minus half of the average daily temperature range. Counts of rainy days are not part of this dataset.
The grid cell’s average elevation is 279 m, while Sapporo lies at about 26 m. Temperatures on this page were therefore adjusted by +1.6 °C3 °F using the standard lapse rate of 6.5 °C per 1,000 m.