Sejong climate: monthly averages: annual mean temperature 11.1 C; warmest month Aug (24.6 C); coldest month Jan (-3.7 C).
Annual mean temperature: 11.1 C
Warmest month: Aug (24.6 C)
Coldest month: Jan (-3.7 C)
Wettest month: Jul (10.19 mm/day)
All-time record high: 38.8 C
All-time record low: -22.2 C
This is the short version of Sejong climate: monthly averages, with the monthly detail underneath. The gap between Jan and Aug is 28.3 C here: -3.7 C against 24.6 C. Precipitation peaks in Jul (10.19 mm/day) and bottoms out in Jan (0.76 mm/day), so a 13.4x difference between the two. Taken together that is roughly 1,217 mm of rain a year for the grid cell. Values come from a public open API; a successful result is cached so a later outage never blanks the page. Scroll for the month-by-month figures, or jump to a neighbouring location from the links below.
Annual mean temperature 11.1 C
Warmest month Aug (24.6 C)
Coldest month Jan (-3.7 C)
Wettest month Jul (10.19 mm/day)
All-time record high 38.8 C
All-time record low -22.2 C
Annual precipitation 1,223 mm / year
Coordinates 36.59245, 127.29223
Population 394,630
Average monthly temperature and rainfall in Sejong
Month
Mean temp (C)
Rain (mm/day)
Record high (C)
Record low (C)
Jan
-3.7
0.76
14.8
-22.2
Feb
-1.1
1.21
19.6
-20.4
Mar
3.8
1.48
23.9
-13.2
Apr
10.3
2.70
29.6
-4.1
May
16.7
2.57
34.3
1.3
Jun
21.8
4.47
35.6
6.9
Jul
24.3
10.19
35.8
14.2
Aug
24.6
8.22
38.8
12.3
Sep
19.5
4.48
31.3
6.8
Oct
12.9
1.73
27.4
-3.3
Nov
5.6
1.38
21.8
-6.8
Dec
-1.6
0.84
16.4
-17.8
What the Sejong climate table shows
Values are multi-decadal climatological averages for the 36.59245, 127.29223 grid cell, not a single year. Rain is the daily mean, so a value of 2.00 mm/day is about 60 mm across a 30-day month. Averages smooth over extremes, so use them for planning rather than for what to pack for next Tuesday.
Frequently asked questions
Does Sejong get the same every year?
Close to it. Averaging decades smooths variation, so treat these as typical rather than guaranteed.