Weather in Sapporo in September 2026
Average weather
Average temperature in Sapporo in September
The temperature in September is +77°F on average, with a range between a maximum of +86°F during the day and a minimum of +50°F at night.
The average maximum temperature goes down 25% by the end of the month, compared with the beginning of the month, from +79°F to +70°F.
Is Sapporo warm or cold in September?
Sapporo is typically mild in September.
Maximum temperatures go down compared to the previous month from +79°F to +72°F. The minimum temperature also goes down from +66°F to +57°F.
Pack a light jacket as it will be warm in the day and cool in the evenings.
September is one of the warmest months in Sapporo, here is the comparison with other months:
Climate in Sapporo in September
| August | September | October | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +79°F | +72°F | +61°F | ||||
| Min. temperature | ||||||
| +48°F | +37°F | +25°F | ||||
| Max. temperature | ||||||
| +95°F | +90°F | +79°F | ||||
| Rainfall | ||||||
| 194 mm | 151 mm | 103 mm | ||||
| Wind | ||||||
| 3 m/s | 3 m/s | 3 m/s | ||||
| Humidity | ||||||
| 79% | 76% | 72% | ||||
| Air pressure | ||||||
| 1009 HPa | 1013 HPa | 1015 HPa | ||||
| Sunny days | ||||||
| 0 | 1 | 2 | ||||
| Cloudy days | ||||||
| 10 | 10 | 10 | ||||
| Rainy days | ||||||
| 20 | 19 | 19 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
September weather is still as ok as in August. It’s getting colder in September. From +79°F in the day, the average maximum temperature lowers to +72°F. As September arrives, the amount of rainfall goes down. On average, the rainfall volume decreases from 194 mm to 151 mm. It feels drier, as humidity decreases from 79% to 76%. The average wind speed doesn’t change much during September, staying around 3 m/s. The good news is there are likely to be more sunny days in September, from 0 to 1.
October brings much the same weather, it remains ok.
Wind
The average wind speed is 3 m/s getting up to 5 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Sapporo is gradually increasing during September, going from 2 m/s to 4 m/s over the course of the month.
Rain
How was the weather last September in Sapporo?
Climate Change Over the Years
The climate in Sapporo in September has not changed that much over the last 43 years.
The average temperature was the lowest in 1986 (+52°F) and the highest in 2023 (+58°F). The driest year was 1984 with only 543 mm of rainfall, and the wettest year was 1981 with 1357 mm.
FAQ
Is September a good time to visit Sapporo?
Can you sunbathe in Sapporo in September?
Is Sapporo rainy in September?
Is it sunny in Sapporo in September?
Other cities in Japan
Monthly weather in Sapporo
Source of the data
For this page, we’ve looked at the typical weather in Sapporo, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
