Annual mean 13°C · wettest around November · prevailing wind SW
Warmest
30.1 °C
Coldest
0.1 °C
Wettest
82%
Windiest
2.7 m/s
Prevailing
SW
1.9 m/s average
When this place is good five ratings · thirty-six ten-day sections · click a cell to read it
never good
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 Sŏngnam over the whole year is 13°C. August is the hottest month, with highs of about 29°C; January is the coldest, with lows of about -5°C. The rainy (wet) season in Sŏngnam runs from November, peaking in November with a 64% chance of rain on a given day. The dry season is December to February; December is the driest month, at 32%. Winds in Sŏngnam are highest in April, averaging 1.6 m/s (6 km/h), and lightest in October, at 1.1 m/s (4 km/h). The prevailing wind is from the SW. The clearest skies in Sŏngnam come in November, when the sky is typically 40% covered; August is the cloudiest month, at 67%.
Month by month Sŏngnam 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
-5°C
-2°C
40%
43%
1.2 m/s
0
0
7
February
4°C
-3°C
0°C
43%
41%
1.4 m/s
0
0
16
March
12°C
3°C
8°C
49%
42%
1.5 m/s
11
0
58
April
17°C
9°C
14°C
48%
41%
1.6 m/s
42
2
77
May
22°C
15°C
21°C
55%
50%
1.4 m/s
75
22
56
June
26°C
20°C
27°C
42%
56%
1.4 m/s
51
61
14
July
28°C
23°C
31°C
46%
65%
1.3 m/s
17
47
4
August
29°C
25°C
34°C
56%
67%
1.3 m/s
7
29
2
September
25°C
18°C
26°C
48%
56%
1.3 m/s
67
47
26
October
19°C
11°C
17°C
44%
44%
1.1 m/s
69
4
79
November
11°C
4°C
8°C
64%
40%
1.1 m/s
18
0
53
December
3°C
-3°C
-1°C
32%
40%
1.2 m/s
0
0
11
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 Sŏngnam weather by season
Year round, Sŏngnam has days of about 2°C at their warmest in January, its coolest month, and 29°C in August, its warmest; the coolest hours of the day run from -5°C to 25°C through the year, and the average temperature over the year is 13°C around the clock. Rain is most likely around November and least likely around December. 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.
Sŏngnam weather in winterDecember to February
High 3°CLow -3°CRain 38%
Winter in Sŏngnam has typical daily highs of about 3°C and lows of about -3°C, with a 38% chance of rain on a given day.
Sŏngnam weather in springMarch to May
High 17°CLow 9°CRain 51%
Spring in Sŏngnam has typical daily highs of about 17°C and lows of about 9°C, with a 51% chance of rain on a given day.
Sŏngnam weather in summerJune to August
High 28°CLow 23°CRain 48%
Summer in Sŏngnam has typical daily highs of about 28°C and lows of about 23°C, with a 48% chance of rain on a given day.
Sŏngnam weather in autumnSeptember to November
High 18°CLow 11°CRain 52%
Autumn in Sŏngnam has typical daily highs of about 18°C and lows of about 11°C, with a 52% chance of rain on a given day.
When is the rainy season in Sŏngnam?
The rainy (wet) season in Sŏngnam runs from November, peaking in November with a 64% chance of rain on a given day. The dry season is December to February; December is the driest month, at 32%.
What time of year is Sŏngnam windiest?
Winds in Sŏngnam are highest in April, averaging 1.6 m/s (6 km/h), and lightest in October, at 1.1 m/s (4 km/h). The prevailing wind is from the SW.
What is the average temperature in Sŏngnam year round?
The average temperature in Sŏngnam over the whole year is 13°C. August is the hottest month, with highs of about 29°C; January is the coldest, with lows of about -5°C.