Seoul, South Korea — Weather in August 2026

Climate Overview

Seoul, South Korea in August has hot conditions, with highs reaching 29.5°C (85°F) and afternoons the warmest part of the day. Rain falls on about 15 days this month, totalling around 242 mm. Sea temperature reaches 29.6°C (85°F).

This month falls at the end of Summer.

Daily highs in August gradually drop from around 31°C (88°F) at the start to 27°C (80°F) by month's end.

August sees fairly even rainfall, totalling about 242 mm across the month.

Expect around 9.5h of sunshine at the start of August, decreasing to 7.3h by the end.

The warmest days tend to fall around the 4th, averaging 31.3°C (88°F).

Temperatures begin dropping heading into September.

Monthly August Averages

Temperature

30°C / 23°C

Feels Like

34°C / 27°C

Rain

15 days · 242 mm

Sunshine

8.6h / day

Humidity

83% — Very Muggy

Wind

13 km/h

Wind Direction

SSW (210°)

Gusts

31 km/h

Daylight

13.6 h

Cloud Cover

64%

Clear Sky Days

1.5

UV Index

6.4 — High

Sea Temperature

30°C

Dew Point

23°C — Muggy

Moon Phase

Waxing Crescent · 3%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

High Low

Daily Precipitation

Rainfall

Daily Sunshine

Sunshine

Daily Wind Speed

Wind Speed

Sun Position

Sunrise 05:48

Daylight 13.6h

Sunset 19:25

What to Expect

Daytime temperatures around 30°C (85°F) are ideal for full-day outdoor exploration. Keep afternoons flexible as tropical showers are common — they typically clear within an hour.

Rain most often builds later in the day, so mornings are typically the driest window and afternoon showers are more likely.

1 of the last 5 yearly records were warmer than this month's long-run average.

Compare Months

3days (19 mm) Excellent

Month	Temp	Feels Like	Rain	Sun	Humidity	UV	Status	Details
January	2°C / -6°C	-2°C / -11°C	3days (19 mm) Excellent	7.6h Good	58% Moderate	2.8 Moderate	Poor	View Details
February	5°C / -4°C	0°C / -8°C	4days (24 mm) Good	8.4h Good	61% Muggy	3.7 Moderate	Poor	View Details
March	12°C / 1°C	9°C / -2°C	5days (40 mm) Good	9.2h Good	67% Muggy	5 Moderate	Fair	View Details
April best	18°C / 7°C	16°C / 4°C	7days (63 mm) Good	9.5h Good	67% Muggy	5.9 High	Good	View Details
May best	22°C / 12°C	22°C / 11°C	8days (105 mm) Wet	10h Excellent	71% Muggy	6.2 High	Excellent	View Details
June best	27°C / 18°C	29°C / 19°C	8days (117 mm) Wet	9.9h Good	75% Muggy	6.9 High	Excellent	View Details
July	29°C / 23°C	34°C / 26°C	15days (285 mm) Wet	8.3h Good	84% Humid	6.6 High	Wet	View Details
August	30°C / 23°C	34°C / 27°C	15days (242 mm) Wet	8.6h Good	83% Humid	6.4 High	Wet	View Details
September best	26°C / 18°C	28°C / 19°C	10days (145 mm) Wet	8.2h Good	79% Humid	5.2 High	Excellent	View Details
October	19°C / 10°C	18°C / 9°C	7days (76 mm) Good	7.9h Good	74% Muggy	4 Moderate	Good	View Details
November	11°C / 2°C	8°C / -1°C	5days (45 mm) Good	7.6h Good	71% Muggy	3.2 Moderate	Fair	View Details
December	3°C / -5°C	-1°C / -9°C	5days (26 mm) Good	7.3h Good	62% Muggy	2.5 Moderate	Poor	View Details

What to Wear

Summer clothing like shorts, t-shirts, and sundresses will be comfortable. Bring a light cardigan for air-conditioned spaces.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

UmbrellaWaterproof jacketWaterproof shoesBreathable clothingSunscreen (SPF 30+)Sun hatSunglasses

Frequently Asked Questions

Expand all

Is August a good time to visit Seoul?

August is typically wet for visiting Seoul, with average highs of 30°C (85°F) and around 15 rainy days. Seoul, South Korea in August has hot conditions, with highs reaching 29.5°C (85°F) and afternoons the warmest part of th

Does it rain a lot in Seoul in August?

Seoul typically sees around 15 rainy days in August with 242 mm (9.5 in) of total rainfall. Pack a waterproof jacket.

Does it get cold at night in Seoul in August?

Nights stay pleasantly warm in Seoul during August, around 23°C (73°F). Light evening wear is sufficient.

What should I pack for Seoul in August?

With highs of 30°C (85°F) and lows of 23°C (73°F) in August, we recommend: Umbrella, Waterproof jacket, Waterproof shoes, Breathable clothing, Sunscreen (SPF 30+). Comfortable walking shoes are essential.

Is August among the best months weather-wise in Seoul?

August is not the most favourable month weather-wise in Seoul. Consider visiting during months with milder temperatures or less rainfall for a better experience.

What is the UV index in Seoul in August?

The average UV index in Seoul during August is 6 (high). Wear sunscreen SPF 30+, a hat, and sunglasses. Limit direct sun exposure between 10 AM and 4 PM.

How many hours of daylight are there in Seoul in August?

Seoul gets approximately 14 hours of daylight per day in August, with around 9 hours of sunshine.

Does it snow in Seoul in August?

Snow is uncommon in Seoul during August based on 10-year climate averages.

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