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Hallasan National Park
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Weather in Hallasan National Park for September 2025

Your guide to Hallasan National Park weather in September - trends and predictions

    Official Weather Alert ⚠️

  • Heavy Rain Warning Updated - See hour by hour.

    • Temperatures

  • Until now, September 2025 in Hallasan National Park has been nearly identical to the historical average, with a temperature of 28.6 °C (showing only a slight deviation of -0.5 °C).

  • Expect cooler weather in the next days in Hallasan National Park with the forecast suggesting a temperature of 25.4 °C, lower than the historical average.

  • In general, the average temperature in Hallasan National Park at the beginning of September is 29.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 24.3 °C by the end of September.

    • Rain 🌧️

  • The climate of Hallasan National Park in September is notably wet, with an average of 15 rainy days, and a total of 136.6 mm of precipitation.

Average dry days
15
Dry days
Average rainy days
15
Rainy days
Average snowy days
0
Snow days
Average temperatures
28°/24°
Temperatures
Average wind speed
22 km/h
Avg max wind
Average humidity
78 %
Avg humidity

Hallasan National Park Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Patchy rain possible
29°
2
Patchy rain possible
29°
3
Patchy rain possible
30°
4
Patchy rain possible
28°
5
Patchy rain possible
29°
6
Light drizzle
30°
7
Patchy rain possible
30°
8
Patchy rain possible
30°
9
Patchy rain possible
28°
10
Patchy rain possible
28°
11
Moderate or heavy rain shower
27°
12
Patchy rain possible
31°
13
Moderate rain at times
29°
14
Patchy rain possible
29°
15
Weather Alert Moderate rain
30°
16
Weather Alert Patchy rain possible
30°
17
Patchy rain possible
30°
18
Patchy rain possible
25°
19
Moderate rain
24°
20
Moderate rain
23°
21
Patchy rain possible
24°
22
Patchy rain possible
24°
23
Patchy rain possible
25°
24
Patchy rain possible
26°
25
Moderate rain
24°
26
Heavy rain
21°
27
Patchy rain possible
25°
28
Partly cloudy
24°
29
Patchy rain possible
25°
30
Patchy rain possible
25°

Temperatures trend during September in Hallasan National Park

See the weather trend as well as the moving average line

September weather in Hallasan National Park day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Patchy rain possible
Patchy rain possible
 29° /25° 1.3 mm 7
2 Sept. Patchy rain possible
Patchy rain possible
 29° /24° 1.4 mm 6
3 Sept. Patchy rain possible
Patchy rain possible
 30° /23° 0.8 mm 7
4 Sept. Patchy rain possible
Patchy rain possible
 28° /23° 0.2 mm 6
5 Sept. Patchy rain possible
Patchy rain possible
 29° /24° 0.7 mm 6
6 Sept. Light drizzle
Light drizzle
 30° /25° 0.6 mm 7
7 Sept. Patchy rain possible
Patchy rain possible
 30° /25° 1.5 mm 7
8 Sept. Patchy rain possible
Patchy rain possible
 30° /24° 3.7 mm 7
9 Sept. Patchy rain possible
Patchy rain possible
 28° /23° 5.6 mm 6
10 Sept. Patchy rain possible
Patchy rain possible
 28° /24° 7.8 mm 7
11 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 27° /23° 13.2 mm 6
12 Sept. Patchy rain possible
Patchy rain possible
 31° /25° 1.4 mm 7
13 Sept. Moderate rain at times
Moderate rain at times
 29° /25° 5.8 mm 6
14 Sept. Patchy rain possible
Patchy rain possible
 29° /25° 0 mm 6
15 Sept. Moderate rain
Moderate rain
 30° /25° 5.9 mm 1.7
16 Sept. Patchy rain possible
Patchy rain possible
 30° /25° 1.2 mm 1.9
17 Sept. Patchy rain possible
Patchy rain possible
 30° /25° 2.4 mm 2
18 Sept. Patchy rain possible
Patchy rain possible
 25° /22° 3.2 mm 0.8
19 Sept. Moderate rain
Moderate rain
 24° /23° 13 mm 5
20 Sept. Moderate rain
Moderate rain
 23° /22° 11.5 mm 5
21 Sept. Patchy rain possible
Patchy rain possible
 24° /21° 0.5 mm 5
22 Sept. Patchy rain possible
Patchy rain possible
 24° /21° 0.2 mm 5
23 Sept. Patchy rain possible
Patchy rain possible
 25° /22° 0.4 mm 5
24 Sept. Patchy rain possible
Patchy rain possible
 26° /24° 4.4 mm 6
25 Sept. Moderate rain
Moderate rain
 24° /20° 14.4 mm 5
26 Sept. Heavy rain
Heavy rain
 21° /17° 23.5 mm 5
27 Sept. Patchy rain possible
Patchy rain possible
 25° /19° 0.4 mm 5
28 Sept. Partly cloudy
Partly cloudy
 24° /21° 0.1 mm 6
29 Sept. Patchy rain possible
Patchy rain possible
 25° /22° 0.8 mm 6
30 Sept. Patchy rain possible
Patchy rain possible
 25° /22° 0.1 mm 6
Next
Important Notice
Our weather forecast for Hallasan National Park in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Hallasan National Park forecast closer to your planned date for the most up-to-date weather information.
Change Month
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Hallasan National Park in September - FAQ

What are the expected maximum and minimum temperatures in Hallasan National Park during September?
During September, expect a variety of temperatures with highs around 28° and lows near 24°, suitable for diverse activities and preferences.
How much rainfall should be expected in Hallasan National Park during September?
Significant rainfall exceeding 136.6 mm is expected in Hallasan National Park during September, occurring over more than 15 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Hallasan National Park during September?
The average wind speed in Hallasan National Park during September is 22 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Hallasan National Park

Explore the daily rainfall trends and prepare for Hallasan National Parks September weather 💧

UV exposure in Hallasan National Park during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️

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Location coordinates Where is Hallasan National Park?

Get accurate weather forecasts for Hallasan National Park, located at latitude 33.372 and longitude 126.558. Stay updated with localized weather information tailored for Hallasan National Park.

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