Wakkanai
Japan
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Wakkanai, Japan

The first month of the autumn, September, is also an enjoyable month in Wakkanai, Japan, with average temperature ranging between max 19.7°C (67.5°F) and min 14°C (57.2°F).

Temperature

In Wakkanai, the average high-temperature in September is almost the same as in August - a comfortable 19.7°C (67.5°F). In Wakkanai, the average low-temperature is 14°C (57.2°F).

Humidity

The average relative humidity in September is 75%.

Rainfall

In Wakkanai, during September, the rain falls for 17 days and regularly aggregates up to 123.5mm (4.9") of precipitation. In Wakkanai, during the entire year, the rain falls for 261 days and collects up to 1062.8mm (41.8") of precipitation.

Snowfall

In Wakkanai snow does not fall in May through September.

Sea temperature

In Wakkanai, in September, the average water temperature is 19.3°C (66.7°F).
Note: For swimming, a surface water temperature of 19.3°C (66.7°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

Daylight

The average length of the day in September is 12.5h.

Sunshine

The average sunshine in Wakkanai is 5.9h.

UV index

In September, the average daily maximum UV index in Wakkanai, Japan, is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in Wakkanai?

In September, the average high-temperature is 19.7°C (67.5°F), and the average low-temperature is 14°C (57.2°F).

What is the average humidity in September in Wakkanai?

In September, the average relative humidity in Wakkanai, Japan, is 75%.

How much does it rain in Wakkanai in September?

In Wakkanai, during September, the rain falls for 17 days and regularly aggregates up to 123.5mm (4.9") of precipitation.

Does it snow in Wakkanai in September?

In Wakkanai, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Wakkanai?

May through September are months without snowfall in Wakkanai, Japan.

What is the sea temperature in September in Wakkanai?

In Wakkanai, Japan, the average seawater temperature in September is 19.3°C (66.7°F). For most, swimming in 19.3°C (66.7°F) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 21°C (69.8°F) to 15°C (59°F).

How many hours of daylight does Wakkanai have in September?

In September, the average length of the day is 12.5h.

How long on average sun shines in September in Wakkanai?

The average sunshine in September is 5.9h.

What is the UV index intensity in September in Wakkanai?

In September, the average daily maximum UV index in Wakkanai, Japan, is 5. A UV Index reading of 3 to 5 represents a moderate health threat from the exposure to the Sun's UV radiation.
Average temperature in September - Wakkanai, Japan
  • Average high temperature in September: 19.7°C

The warmest month (with the highest average high temperature) is August (22.3°C).
The month with the lowest average high temperature is January (-2.7°C).

  • Average low temperature in September: 14°C

The month with the highest average low temperature is August (17.3°C).
The coldest month (with the lowest average low temperature) is February (-7.1°C).

Average humidity in September - Wakkanai, Japan
  • Average humidity in September: 75%

The month with the highest relative humidity is July (86%).
The month with the lowest relative humidity is November (67%).

Average rainfall in September - Wakkanai, Japan
  • Average rainfall in September: 123.5mm

The wettest month (with the highest rainfall) is October (134.1mm).
The driest month (with the lowest rainfall) is April (49mm).

Average rainfall days in September - Wakkanai, Japan
  • Average rainfall days in September: 17 days

The month with the highest number of rainy days is January (30 days).
Months with the lowest number of rainy days are April, June and September (17 days).

Average snowfall in September - Wakkanai, Japan
  • Average snowfall in September: 0mm

The month with the highest snowfall is January (1730mm).
Months with the lowest snowfall are May, June, July, August and September (0mm).

Average snowfall days in September - Wakkanai, Japan
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is December (28.2 days).
Months with the lowest number of snowfall days are May, June, July, August and September (0 days).

Average sea temperature in September - Wakkanai, Japan
  • Average sea temperature in September: 19.3°C

The best month for swimming (with the highest average sea temperature) is August (19.7°C).
The coldest month (with the lowest average sea temperature) is February (2.7°C).

Average daylight in September / Average sunshine in September - Wakkanai, Japan
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.6h).
The month with shortest days is December (Average daylight: 8.8h).

  • Average sunshine in September: 5.9h

The month with most sunshine is May (Average sunshine: 6h).
The month with least sunshine is December (Average sunshine: 1h).

Average UV index in September - Wakkanai, Japan
  • Average UV index in September: 5

The month with the highest UV index is July (UV index 8).
Months with the lowest UV index are January, November and December (UV index 1).