Osan in september: average Weather, Temperature and Climate
Weather in Osan in september 2025
The weather in Osan in september comes from statistical datas on the past years. You can view the weather statistics for the whole month, but also by clicking on the tabs for the beginning, the middle and the end of the month.
Average weather throughout september
perfect weather UV index: 6
Weather at 6am
65°F
Clear/Sunny
36% of time
23%
18%
13%
Weather at 12pm
77°F
Clear/Sunny
46% of time
25%
18%
7%
Weather at 6pm
74°F
Clear/Sunny
47% of time
27%
17%
6%
Weather at 3am
65°F
38%
25%
17%
9%
Evolution of daily average temperature and precipitation in Osan in september
These charts show the evolution of average minimum/maximum temperatures as well as average daily precipitation volume in Osan in september.
The climate of Osan in september is perfect
The weather in september in Osan is rather dry (with 4.1in of precipitation over 4 days). This is better than the previous month since in august it receives an average of 6.6in of precipitation over 9 days.
The climate pleasant in this city the month of september. Temperatures are up to 79°F. The minimum is 65°F. Thus, the mean temperature average in september in Osan is 72°F. Note that these seasonal averages are in contrast with those observed in Osan in september with a maximum record of 94°F in 2017 and a minimum record of 45°F in 2010. You can plan to have about 3 days with temperatures over 86°F, or 10 of time.
In september in Osan, the days on average last 12:27. Sunrise is at 06:13 and sets at 18:40.
With a good climate, the month of september is recommended to go there.
Seasonal average climate and temperature of Osan in september
Check below seasonal norms These datas are compiled from the weather statements of the last years of the month of september.
| September | |||||
| Outside temperature | |||||
| Average temperature | 72°F | ||||
| Highest temperature | 79°F | ||||
| Lowest temperature | 65°F | ||||
| Highest record temperature | 94°F (2017) | ||||
| Lowest record temperature | 45°F (2010) | ||||
| Number of days at +86°F | 3 day(s) (10%) | ||||
| Number of days at +65°F | 30 day(s) (100%) | ||||
| Wind | |||||
| Wind speed | 12km/h | ||||
| Wind temperature | 65°F | ||||
| Precipitation (rainfall) | |||||
| Rainfall | 4.1in | ||||
| Number of days with rainfall | 4 day(s) (13%) | ||||
| Record daily rainfall | 4.1in (2021) | ||||
| Other climate data | |||||
| Humidity | 87% | ||||
| Visibility | 9.04km | ||||
| Cloud cover | 33% | ||||
| UV index | 6 | ||||
| Daily sunshine hours | 11 | ||||
| Sunrise and sunset | |||||
| Time of sunrise | 06:13 | ||||
| Time of sunset | 18:40 | ||||
| Length of day | 12:27 | ||||
| Our opinion about the weather in september | |||||
| Our opinion at whereandwhen.net | perfect | ||||
How was the weather last september?
Here is the day by day recorded weather in Osan in september 2024:
70°F to 85°F
70°F to 76°F
72°F to 85°F
67°F to 86°F
72°F to 85°F
76°F to 83°F
72°F to 85°F
70°F to 86°F
72°F to 88°F
74°F to 88°F
74°F to 92°F
77°F to 83°F
74°F to 79°F
76°F to 86°F
74°F to 86°F
72°F to 88°F
77°F to 88°F
76°F to 86°F
76°F to 86°F
77°F to 85°F
63°F to 74°F
67°F to 72°F
59°F to 74°F
58°F to 76°F
61°F to 79°F
68°F to 77°F
65°F to 79°F
65°F to 79°F
63°F to 77°F
63°F to 79°F
Map: other cities in South Korea in september
Cities near Osan:
| Hwaseong-si in september | good weather |
| Anseong in september | good weather |
| Ansan-si in september | good weather |
| Icheon-si in september | good weather |
| Cheonan in september | good weather |
| Asan in september | good weather |
| Incheon in september | good weather |
| Seoul in september | good weather |
| Yangp'yong in september | good weather |
| Namyangju in september | good weather |
| Goyang-si in september | good weather |
| Cheongju in september | good weather |
Click over cities on the map for information about the weather in september.
Osan
perfect weather
good
tolerable
bad
very bad
Weather data for Osan in september:
Weather data for Osan for september are derived from an average of the weather forecast since 2009 in Osan. There is a margin of error and these forecasts are to be considered as general information only. The weather in Osan can vary slightly from year to year, but this data should limit surprises. So you can pack your bags or check for the best time in year to go to Osan.