Seongnam-si weather records
Record high and low temperatures for Seongnam-si, by month, by season, and all-time, with the dates they occurred, across 1980–2026 of daily climate history. Its hottest day on record reached 38°C on 2018-08-15; its coldest fell to -25°C on 2001-01-13.
Records by month
The warmest (▲) and coldest (▼) both the daytime high and the overnight low have ever been in each calendar month, so each column shows its record high and its record low. Tap a month for its full averages and typical range.
| Month | Daytime high | Overnight low |
|---|---|---|
| January | 14°C2002-01-14
-15°C1986-01-05
|
7°C2002-01-14
-25°C2001-01-13
|
| February | 19°C2004-02-20
-11°C2013-02-08
|
10°C1992-02-28
-22°C1984-02-02
|
| March | 25°C2025-03-26
-2°C2006-03-12
|
15°C2009-03-18
-12°C2004-03-06
|
| April | 30°C2005-04-30
6°C1993-04-08
|
19°C2005-04-30
-4°C1991-04-01
|
| May | 32°C2014-05-31
12°C1981-05-17
|
21°C2018-05-16
5°C1991-05-04
|
| June | 35°C2024-06-19
17°C1998-06-03
|
26°C2022-06-27
9°C1981-06-01
|
| July | 37°C2015-07-11
20°C2006-07-16
|
28°C1994-07-28
16°C1993-07-21
|
| August | 38°C2018-08-15
20°C1996-08-26
|
28°C2014-08-01
13°C2022-08-27
|
| September | 34°C2024-09-11
15°C1987-09-26
|
25°C2024-09-13
6°C2011-09-30
|
| October | 29°C2006-10-05
6°C1980-10-26
|
21°C2021-10-04
-2°C2002-10-28
|
| November | 25°C2023-11-02
-3°C1992-11-26
|
17°C2023-11-05
-13°C1996-11-30
|
| December | 17°C2023-12-09
-10°C1980-12-29
|
8°C1990-12-07
-19°C2001-12-30
|
Records by season
The warmest (▲) and coldest (▼) both the daytime high and the overnight low have reached in each meteorological season (Northern Hemisphere, each a three-month span).
| Season | Daytime high | Overnight low |
|---|---|---|
| Winter (Dec–Feb) | 19°C2004-02-20
-15°C1986-01-05
|
10°C1992-02-28
-25°C2001-01-13
|
| Spring (Mar–May) | 32°C2014-05-31
-2°C2006-03-12
|
21°C2018-05-16
-12°C2004-03-06
|
| Summer (Jun–Aug) | 38°C2018-08-15
17°C1998-06-03
|
28°C2014-08-01
9°C1981-06-01
|
| Autumn (Sep–Nov) | 34°C2024-09-11
-3°C1992-11-26
|
25°C2024-09-13
-13°C1996-11-30
|
All-time records
The most extreme value Seongnam-si has recorded for each metric across its entire history.
High
Low
Feels-like
Humidity
Wind
Gust
Precip
For rainfall, the “driest” figure is the longest run of consecutive days without measurable rain, dated to when that dry spell began.