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Jeju-do South KoreaUnited States

Weather in Hallasan National Park for September 2025

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

    Temperatures

  • In general, the average temperature in Hallasan National Park at the beginning of September is 28.6 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 24.9 °C by the end of September.

  • Rain 🌧️

  • Hallasan National Park in September brings notable rainfall, with an average of 20 rainy days and a total precipitation of 136.6 mm.

Average dry days
10
Dry days
Average rainy days
20
Rainy days
Average snowy days
0
Snow days
Average temperatures
28°/24°
Temperatures
Average wind speed
22 km/h
Avg max wind
Average humidity
79 %
Avg humidity

Hallasan National Park in September average weather

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Temperatures trend during September in Hallasan National Park

See the weather trend as well as the moving average line

September weather day by day

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Date Weather Temperatures Rain UV More
1 Sept. Patchy rain possible
Patchy rain possible
27° /24° 0.2 mm 6
2 Sept. Patchy rain possible
Patchy rain possible
28° /23° 0 mm 6
3 Sept. Patchy rain possible
Patchy rain possible
29° /23° 0.8 mm 6
4 Sept. Patchy rain possible
Patchy rain possible
29° /23° 0.3 mm 6
5 Sept. Patchy rain possible
Patchy rain possible
29° /24° 0.3 mm 6
6 Sept. Light drizzle
Light drizzle
29° /25° 1 mm 6
7 Sept. Patchy rain possible
Patchy rain possible
29° /25° 0.2 mm 6
8 Sept. Patchy rain possible
Patchy rain possible
30° /24° 0.3 mm 7
9 Sept. Patchy rain possible
Patchy rain possible
29° /24° 0.2 mm 6
10 Sept. Patchy rain possible
Patchy rain possible
30° /26° 0.2 mm 7
11 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
28° /24° 25.1 mm 6
12 Sept. Patchy rain possible
Patchy rain possible
31° /26° 0.7 mm 7
13 Sept. Moderate rain at times
Moderate rain at times
29° /25° 1 mm 6
14 Sept. Patchy rain possible
Patchy rain possible
29° /25° 0 mm 6
15 Sept. Patchy rain possible
Patchy rain possible
30° /26° 2.7 mm 7
16 Sept. Patchy rain possible
Patchy rain possible
31° /26° 4.5 mm 7
17 Sept. Light rain shower
Light rain shower
29° /26° 6.4 mm 6
18 Sept. Patchy rain possible
Patchy rain possible
30° /26° 2.1 mm 7
19 Sept. Patchy light drizzle
Patchy light drizzle
30° /26° 2.4 mm 7
20 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
27° /25° 57.8 mm 6
21 Sept. Light rain shower
Light rain shower
28° /24° 12.6 mm 6
22 Sept. Light rain shower
Light rain shower
25° /24° 9.6 mm 6
23 Sept. Patchy rain possible
Patchy rain possible
24° /21° 2 mm 5
24 Sept. Light rain shower
Light rain shower
23° /21° 1.2 mm 5
25 Sept. Light rain shower
Light rain shower
26° /21° 2.9 mm 6
26 Sept. Patchy rain possible
Patchy rain possible
26° /23° 0 mm 6
27 Sept. Patchy rain possible
Patchy rain possible
25° /21° 0.1 mm 6
28 Sept. Patchy rain possible
Patchy rain possible
24° /23° 1.3 mm 5
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
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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.

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 20 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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