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Weather in Cheonan for September 2026

Your guide to Cheonan weather in September - trends and predictions

    Temperatures

  • In general, the average temperature in Cheonan at the beginning of September is 28.1 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 24.6 °C by the end of September.

    • Rain 🌧️

  • Cheonan in September brings notable rainfall, with an average of 20 rainy days and a total precipitation of 288.3 mm.

Average dry days
10
Dry days
Average rainy days
20
Rainy days
Average snowy days
0
Snow days
Average temperatures
28°/20°
Temperatures
Average wind speed
11 km/h
Avg max wind
Average humidity
83 %
Avg humidity

Cheonan Weather September

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

Temperatures trend during September in Cheonan

See the weather trend as well as the moving average line

September weather in Cheonan day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Light rain shower
Light rain shower
 28° /21° 8.8 mm 6
2 Sept. Light rain shower
Light rain shower
 28° /21° 3.3 mm 6
3 Sept. Cloudy
Cloudy
 31° /19° 1 mm 7
4 Sept. Light rain shower
Light rain shower
 27° /21° 9.4 mm 6
5 Sept. Patchy rain possible
Patchy rain possible
 31° /19° 0.2 mm 7
6 Sept. Patchy light rain with thunder
Patchy light rain with thunder
 29° /22° 5.4 mm 6
7 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 23° /16° 17.5 mm 5
8 Sept. Overcast
Overcast
 27° /17° 0 mm 6
9 Sept. Patchy rain possible
Patchy rain possible
 29° /19° 1.4 mm 7
10 Sept. Patchy rain possible
Patchy rain possible
 30° /18° 0.1 mm 7
11 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 31° /20° 8.2 mm 7
12 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 25° /21° 27.3 mm 6
13 Sept. Moderate rain at times
Moderate rain at times
 27° /21° 21 mm 6
14 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 29° /21° 4 mm 7
15 Sept. Patchy rain possible
Patchy rain possible
 30° /20° 0.4 mm 7
16 Sept. Partly cloudy
Partly cloudy
 30° /21° 4.4 mm 7
17 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 27° /20° 12.2 mm 6
18 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 27° /19° 4 mm 6
19 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 25° /18° 12.3 mm 6
20 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 25° /18° 52.1 mm 6
21 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 24° /16° 41.1 mm 5
22 Sept. Patchy rain possible
Patchy rain possible
 23° /15° 0.6 mm 5
23 Sept. Partly cloudy
Partly cloudy
 24° /14° 0 mm 6
24 Sept. Overcast
Overcast
 25° /15° 6.3 mm 6
25 Sept. Patchy rain possible
Patchy rain possible
 24° /17° 3.2 mm 6
26 Sept. Heavy rain at times
Heavy rain at times
 25° /17° 1.2 mm 7
27 Sept. Patchy rain possible
Patchy rain possible
 26° /16° 0.2 mm 6
28 Sept. Overcast
Overcast
 23° /17° 7.8 mm 6
29 Sept. Sunny
Sunny
 25° /15° 0 mm 6
30 Sept. Partly cloudy
Partly cloudy
 24° /14° 0 mm 7
Next
Important Notice
Our weather forecast for Cheonan 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 Cheonan forecast closer to your planned date for the most up-to-date weather information.
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Cheonan in September - FAQ

What are the expected maximum and minimum temperatures in Cheonan during September?
During September, expect a variety of temperatures with highs around 28° and lows near 20°, suitable for diverse activities and preferences.
How much rainfall should be expected in Cheonan during September?
Significant rainfall exceeding 288.3 mm is expected in Cheonan during September, occurring over more than 20 days. Preparing for wet conditions is recommended in your planning.
What are the typical wind conditions in Cheonan during September?
The average wind speed in Cheonan during September is 11 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Cheonan

Explore the daily rainfall trends and prepare for Cheonans September weather 💧

UV exposure in Cheonan during September

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

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Location coordinates Where is Cheonan?

Get accurate weather forecasts for Cheonan, located at latitude 36.807 and longitude 127.152. Stay updated with localized weather information tailored for Cheonan.

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