September weather forecastSapporo, Japan
September
Weather in September
The arrival of September signals a shift in Sapporo's weather. A decrease in temperatures is noticed as the summer gradually transforms into the cooler autumn. Rainfall begins to diminish, and remarkably, there is no snowfall during this month. Sunlight hours continue to drop as the season transitions from the warm, bright summer to a gentler and calmer autumn. During this "mild" month, residents look forward to moon viewing parties and autumn festivals.Temperature
With the beginning of September, the average high-temperature shows a small decrease, transitioning from a warm 24.2°C (75.6°F) in August to a pleasant 20.2°C (68.4°F). Nighttime temperature in Sapporo, Japan, dips to a mean of 12.5°C (54.5°F) during September.Humidity
The average relative humidity in September in Sapporo, Japan, is 83%.Rainfall
In September, the rain falls for 17 days. Throughout September, 78mm (3.07") of precipitation is accumulated. In Sapporo, during the entire year, the rain falls for 167 days and collects up to 843mm (33.19") of precipitation.Snowfall
May through September are months without snowfall in Sapporo.Daylight
In Sapporo, the average length of the day in September is 12h and 31min.On the first day of September, sunrise is at 04:59 and sunset at 18:09. On the last day of the month, sunrise is at 05:30 and sunset at 17:18 JST.
Sunshine
In September, the average sunshine is 7.9h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.Note: In September, an average UV index of 4 transforms into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Sapporo, Japan
- Average high temperature in September: 20.2°C
The warmest month (with the highest average high temperature) is August (24.2°C).
The month with the lowest average high temperature is January (-3.7°C).
- Average low temperature in September: 12.5°C
The month with the highest average low temperature is August (16.3°C).
The coldest month (with the lowest average low temperature) is February (-10°C).
Average pressure in September
Sapporo, Japan
- Average pressure in September: 1013.5mbar
The month with the highest atmospheric pressure is November (1016.2mbar).
The month with the lowest atmospheric pressure is July (1008.6mbar).
Average wind speed in September
Sapporo, Japan
- Average wind speed in September: 9.7km/h
The windiest months (with the highest average wind speed) are April and December (12.8km/h).
The calmest month (with the lowest average wind speed) is August (8.8km/h).
Average humidity in September
Sapporo, Japan
- Average humidity in September: 83%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are April and May (77%).
Average rainfall in September
Sapporo, Japan
- Average rainfall in September: 78mm
The wettest month (with the highest rainfall) is August (112mm).
The driest month (with the least rainfall) is April (51mm).
Average rainfall days in September
Sapporo, Japan
- Average rainfall days in September: 17 days
The month with the highest number of rainy days is August (19.5 days).
The month with the least rainy days is February (5.3 days).
Average snowfall in September
Sapporo, Japan
- Average snowfall in September: 0mm
The month with the highest snowfall is January (430mm).
The months with the least snowfall are May, June, July, August and September (0mm).
Average snowfall days in September
Sapporo, Japan
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (28 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Sapporo, Japan
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in September: 7h and 54min
The month with the most sunshine is August (Average sunshine: 8h and 48min).
The month with the least sunshine is January (Average sunshine: 2h and 12min).
Average sunshine days in September
Sapporo, Japan
- Average sunshine days in September: 9 days
The month with the most sunshine days is May (13.4 days).
The month with the least sunshine days is December (2.7 days).
Average UV index in September
Sapporo, Japan
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in September
Sapporo, Japan
- Average cloud cover in September: 41
The month with the most cloud cover is January (Cloud cover 78).
The month with the least cloud cover is September (Cloud cover 41).
Average visibility in September
Sapporo, Japan
- Average visibility in September: 8km
The months with the highest visibility are April, May and October (9km).
The month with the lowest visibility is January (6km).
