Annual mean 13°C · wettest around August · prevailing wind W
Warmest
30.7 °C
Coldest
1.7 °C
Wettest
74%
Windiest
3.1 m/s
Prevailing
W
2.3 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec
Every reading
bars actual · line feels-like, °Cchance of rain, %wind speed, m/ssky covered, %
The average temperature in Sejong over the whole year is 13°C. August is the hottest month, with highs of about 30°C; January is the coldest, with lows of about -4°C. Sejong has no sharply defined rainy season: the chance of rain on a given day runs from 41% in January, the driest month, to 65% in August, the wettest. Winds in Sejong are highest in March, averaging 2.1 m/s (8 km/h), and lightest in September, at 1.5 m/s (5 km/h). The prevailing wind is from the W. The clearest skies in Sejong come in November, when the sky is typically 48% covered; July is the cloudiest month, at 71%.
Month by month Sejong climate by month: average temperatures year round · click a month to read it
Month
High
Low
Feels like
Chance of rain
Cloud
Wind
Being outside
Sun
Walking
January
2°C
-4°C
-2°C
41%
53%
1.7 m/s
0
0
7
February
5°C
-3°C
1°C
43%
52%
1.9 m/s
1
0
15
March
12°C
3°C
8°C
53%
50%
2.1 m/s
13
0
56
April
17°C
8°C
14°C
56%
52%
2.1 m/s
46
2
78
May
22°C
14°C
21°C
62%
59%
1.9 m/s
75
19
58
June
26°C
20°C
27°C
52%
64%
1.7 m/s
47
58
14
July
28°C
24°C
32°C
65%
71%
1.6 m/s
15
41
3
August
30°C
24°C
34°C
65%
67%
1.6 m/s
9
28
3
September
25°C
18°C
27°C
61%
62%
1.5 m/s
56
50
21
October
19°C
10°C
18°C
50%
52%
1.5 m/s
71
5
77
November
12°C
4°C
9°C
50%
48%
1.6 m/s
22
0
57
December
4°C
-3°C
-0°C
42%
53%
1.7 m/s
1
0
14
High and low are the warmest and coolest of four readings a day — midnight, 6am, noon and 6pm — so a true overnight low can sit a degree or two under them. Chance of rain, cloud and wind are the day’s average; feels-like and the three ratings (each out of 100: Good from 55, Ideal from 80) are read at midday.
Seasons, and the year in short Sejong weather by season
Year round, Sejong has days of about 2°C at their warmest in January, its coolest month, and 30°C in August, its warmest; the coolest hours of the day run from -4°C to 24°C through the year, and the average temperature over the year is 13°C around the clock. Rain is most likely around August and least likely around January. Every figure here is a decade of observations blended into one representative year, so it reads as what this date is usually like, not a forecast for one particular day.
Sejong weather in winterDecember to February
High 4°CLow -3°CRain 42%
Winter in Sejong has typical daily highs of about 4°C and lows of about -3°C, with a 42% chance of rain on a given day.
Sejong weather in springMarch to May
High 17°CLow 8°CRain 57%
Spring in Sejong has typical daily highs of about 17°C and lows of about 8°C, with a 57% chance of rain on a given day.
Sejong weather in summerJune to August
High 28°CLow 22°CRain 61%
Summer in Sejong has typical daily highs of about 28°C and lows of about 22°C, with a 61% chance of rain on a given day.
Sejong weather in autumnSeptember to November
High 19°CLow 11°CRain 54%
Autumn in Sejong has typical daily highs of about 19°C and lows of about 11°C, with a 54% chance of rain on a given day.
When is the rainy season in Sejong?
Sejong has no sharply defined rainy season: the chance of rain on a given day runs from 41% in January, the driest month, to 65% in August, the wettest.
What time of year is Sejong windiest?
Winds in Sejong are highest in March, averaging 2.1 m/s (8 km/h), and lightest in September, at 1.5 m/s (5 km/h). The prevailing wind is from the W.
What is the average temperature in Sejong year round?
The average temperature in Sejong over the whole year is 13°C. August is the hottest month, with highs of about 30°C; January is the coldest, with lows of about -4°C.