Daejeon Weather in September

September in Daejeon typically sees daytime highs of 27°C (81°F) and nighttime lows of 17°C (63°F). Rainfall is also possible this month, so it's worth packing an umbrella.

Rainfall in Daejeon in September

Climate statistics over the past 30 years suggest around 9 days of rain, with 148 mm (5.8 in) average for the month. When showers do arrive, they tend to be on the heavier side. Worth being prepared even if rain days are not that numerous.

Temperature in Daejeon in September

Expect highs of 27°C (81°F) in Daejeon in September, with nights dropping to around 17°C (63°F). This kind of day-to-night contrast is typical for this time of year. With lows of 17°C (63°F), nights are cool. If you're out after dark, an extra layer will keep you comfortable. The cooler air at night is also great for getting a good rest.

Sunshine in Daejeon in September

With about 171 hours of sunshine, the area enjoys a nice balance of sun and overcast, creating a pleasant environment.

Wind Speed in Daejeon in September

September sees wind speeds averaging (). You'll typically experience very calm weather with minimal air movement throughout the month. Keep in mind this is an average. While most days are nearly windless, occasional windier days may still occur.

If you prefer dry days with pleasant temperatures, April, May and October typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.

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For a detailed overview over the year and the best time to visit South Korea, check out our Daejeon's climate page.

Daejeon Temperature in September

Min Temperature 17°C (63°F)  

Max Temperature 27°C (81°F)  

Chance of Rain 30%  

Precipitation 148 mm (5.8 in)  

Rainy days 9 days  

Humidity 74%  

Windspeed ()  

Sunshine 171 hours  

Percentage Sunshine 45%  

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Daejeon typically drop from around 28°C (82°F) at the start of September to approximately 24°C (75°F) by the end. Nights are pleasant, with lows typically ranging from 12°C (54°F) to 20°C (68°F).

Average temperatures in September

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Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in September

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Historical weather for Daejeon in September

Browse day-by-day weather records for Daejeon spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

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Daejeon historical weather extremes in September

Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in Daejeon.

• The warmest day in September was on September 10, 2024, with a maximum of 36°C (97°F).
• Daejeon experienced its chilliest September day on September 26, 1987, reaching only 16°C (61°F).
• Nighttime temperatures dropped to 3°C (37°F) on September 27, 1987, marking the coldest September night on record.

What to Wear in Daejeon in September

Warm but pleasant conditions in Daejeon in September. Focus on lightweight, maybe with natural fabrics, cotton blend shirts, comfortable shorts, and breathable footwear. A light cover-up for sun protection is smart too. Expect heavy rainfall, so bring good rain protection and waterproof bags. Bring sunglasses since you'll have some sunny periods throughout the month

What To Do in Daejeon in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

7/10

Cycling

7/10

Walking

7/10

Camping

6/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit South Korea, check out our Daejeon's climate page.

More climate data for Daejeon

Temperature Rainfall Sunshine Humidity Wind Speed

See the full Daejeon climate overview or explore weather in South Korea.