September weather forecast
Gangneung, South Korea

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Weather in September

By September, Gangneung's weather starts to transition into fall with temperatures beginning to cool. A significant fall in the average high temperature is observed, yet still maintaining a fairly warm weather condition. In contrast to the high summer rainfall, September sees a drop to 87mm (3.43") of rainfall. As the rains subside and the temperature begins to cool, the autumn foliage starts to make its appearance, transforming Gangneung into a picturesque landscape. Sea temperatures recede slowly, signalling the end of the perfect swimming season.

Temperature

September ushers in a minor alteration in Gangneung's climate, with the average high-temperature moving from August's moderately hot 25.8°C (78.4°F) to a pleasant 21.4°C (70.5°F). The low-temperature averages to a mild 15.9°C (60.6°F) during the nights of September.

Humidity

In September, the average relative humidity in Gangneung is 79%.

Rainfall

In September, the rain falls for 11.1 days. Throughout September, 87mm (3.43") of precipitation is accumulated. Throughout the year, in Gangneung, there are 127 rainfall days, and 755mm (29.72") of precipitation is accumulated.

Snowfall

In Gangneung, snow does not fall in May through October.

Sea temperature

In Gangneung, in September, the average water temperature is 21.8°C (71.2°F).
Note: Most people do not take pleasure in swimming in water at 21.8°C (71.2°F). The difficulty of managing breathing increases as the water temperature dips from 21°C (69.8°F) to 15°C (59°F).

Daylight

In Gangneung, the average length of the day in September is 12h and 26min.
On the first day of September in Gangneung, South Korea, sunrise is at 05:54 and sunset at 18:54. On the last day of the month, sunrise is at 06:19 and sunset at 18:09 KST.

Sunshine

In Gangneung, the average sunshine in September is 8.3h.

UV index

The average daily maximum UV index in September in Gangneung is 5. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.
Note: A daily high UV index of 5 in September leads to these guidelines:
Make use of precautions - Suggestions to resist sunburn are communicated. To avoid the Sun's strongest rays, limit exposure around the mid-day period. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

Frequently asked questions

What is the average September temperature in Gangneung?

Gangneung in September has an average high-temperature of 21.4°C (70.5°F) and an average low-temperature of 15.9°C (60.6°F).

What is the average humidity in September in Gangneung?

In September, the average relative humidity in Gangneung is 79%.

How much does it rain in Gangneung in September?

In Gangneung, South Korea, during September, the rain falls for 11.1 days and regularly aggregates up to 87mm (3.43") of precipitation.

When it does not snow in Gangneung?

In Gangneung, South Korea, snow does not fall in May through October.

What is the sea water temperature in September in Gangneung?

In Gangneung, the average seawater temperature in September is 21.8°C (71.2°F). For swimming, a surface water temperature of 21.8°C (71.2°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).

What is the average length of the day in September in Gangneung?

In Gangneung, South Korea, the average day length in September is 12h and 26min.

When are sunrise and sunset in September in Gangneung?

In September, on the first day of the month, sunrise is at 05:54 and sunset at 18:54. On the last day of the month, in Gangneung, South Korea, sunrise is at 06:19 and sunset at 18:09 KST.

How many hours of sunshine does Gangneung have in September?

The average sunshine duration in September in Gangneung is 8.3h.

What is the UV index reading in September in Gangneung?

The average daily maximum UV index in September in Gangneung, South Korea, is 5. A UV Index estimate of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in September
Gangneung, South Korea

Average temperature in September - Gangneung, South Korea
  • Average high temperature in September: 21.4°C

The warmest month (with the highest average high temperature) is August (25.8°C).
The month with the lowest average high temperature is January (1°C).

  • Average low temperature in September: 15.9°C

The month with the highest average low temperature is August (20.5°C).
The coldest month (with the lowest average low temperature) is January (-4.6°C).

Average pressure in September
Gangneung, South Korea

Average pressure in September - Gangneung, South Korea
  • Average pressure in September: 1014.2mbar

The month with the highest atmospheric pressure is January (1023.2mbar).
The month with the lowest atmospheric pressure is July (1007.1mbar).

Average wind speed in September
Gangneung, South Korea

Average wind speed in September - Gangneung, South Korea
  • Average wind speed in September: 9.7km/h

The windiest month (with the highest average wind speed) is December (16.5km/h).
The calmest month (with the lowest average wind speed) is June (9.5km/h).

Average humidity in September
Gangneung, South Korea

Average humidity in September - Gangneung, South Korea
  • Average humidity in September: 79%

The month with the highest relative humidity is July (85%).
The months with the lowest relative humidity are January and December (62%).

Average rainfall in September
Gangneung, South Korea

Average rainfall in September - Gangneung, South Korea
  • Average rainfall in September: 87mm

The wettest month (with the highest rainfall) is July (148mm).
The driest month (with the least rainfall) is December (23mm).

Average rainfall days in September
Gangneung, South Korea

Average rainfall days in September - Gangneung, South Korea
  • Average rainfall days in September: 11.1 days

The month with the highest number of rainy days is July (19.9 days).
The month with the least rainy days is February (4.8 days).

Average snowfall in September
Gangneung, South Korea

Average snowfall in September - Gangneung, South Korea
  • Average snowfall in September: 0mm

The month with the highest snowfall is February (79mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).

Average snowfall days in September
Gangneung, South Korea

Average snowfall days in September - Gangneung, South Korea
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (5.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature in September
Gangneung, South Korea

Average sea temperature in September - Gangneung, South Korea
  • Average sea temperature in September: 21.8°C

The best month for swimming (with the highest average sea temperature) is August (24°C).
The coldest month (with the lowest average sea temperature) is March (8.4°C).

Average daylight in September /
Average sunshine in September
Gangneung, South Korea

Average daylight in September / Average sunshine in September - Gangneung, South Korea
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 42min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in September: 8h and 2min

The month with the most sunshine is May (Average sunshine: 10h and 24min).
The month with the least sunshine is November (Average sunshine: 6h and 0min).

Average sunshine days in September
Gangneung, South Korea

Average sunshine days in September - Gangneung, South Korea
  • Average sunshine days in September: 15.6 days

The month with the most sunshine days is January (22.6 days).
The month with the least sunshine days is July (7.1 days).

Average UV index in September
Gangneung, South Korea

Average UV index in September - Gangneung, South Korea
  • Average UV index in September: 5

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in September
Gangneung, South Korea

Average cloud cover in September - Gangneung, South Korea
  • Average cloud cover in September: 33

The month with the most cloud cover is July (Cloud cover 42).
The month with the least cloud cover is December (Cloud cover 24).

Average visibility in September
Gangneung, South Korea

Average visibility in September - Gangneung, South Korea
  • Average visibility in September: 10km

The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (10km).
The months with the lowest visibility are July and August (9km).

Gangneung, South Korea

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