Seongnam-si Climate by Month
Seongnam-si, Gyeonggi-do, South Korea
Warm summers and freezing winters, with most rain from June to September.
Seongnam-si has warm summers and freezing winters, with most rain from June to September. August is the warmest month, with highs around 85°F (30°C); January is the coolest at 35°F (2°C), and nights dip to 18°F (-8°C). It gets 49 in (1234 mm) of rain a year, 71% of it from June to September.
- Warmest month
- 85°F(30°C)
- Average high, August
- Coldest nights
- 18°F(-8°C)
- Average low, January
- Rain per year
- 49 in(1234 mm)
- Wettest: July
- Humidity
- 67%
- Sunniest: May
Best and worst months in Seongnam-si
Best for weatherThe most comfortable weather comes in May, with highs around 74°F (23°C) and about 3.5 in (88 mm) of rain a month.
Least pleasantJanuary is the least pleasant month: it's the coldest, with highs of only 35°F (2°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in May.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Seongnam-si weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 35°F(2°C) | 18°F(-8°C) | 0.7 in(17 mm) | 61% | 2.2 |
| FebFebruary | 41°F(5°C) | 23°F(-5°C) | 0.9 in(24 mm) | 66% | 3.1 |
| MarMarch | 51°F(11°C) | 31°F(0°C) | 1.5 in(39 mm) | 56% | 4.0 |
| AprApril | 64°F(18°C) | 43°F(6°C) | 2.9 in(74 mm) | 57% | 4.9 |
| MayMayBest | 74°F(23°C) | 54°F(12°C) | 3.5 in(88 mm) | 64% | 5.4 |
| JunJune | 81°F(27°C) | 64°F(18°C) | 4.7 in(120 mm) | 67% | 5.2 |
| JulJuly | 84°F(29°C) | 71°F(21°C) | 14 in(353 mm) | 79% | 4.1 |
| AugAugust | 85°F(30°C) | 71°F(22°C) | 11 in(279 mm) | 76% | 4.2 |
| SepSeptember | 78°F(26°C) | 60°F(16°C) | 5.0 in(128 mm) | 74% | 4.0 |
| OctOctober | 67°F(20°C) | 47°F(8°C) | 1.9 in(48 mm) | 69% | 3.5 |
| NovNovember | 53°F(12°C) | 34°F(1°C) | 1.7 in(44 mm) | 62% | 2.4 |
| DecDecember | 39°F(4°C) | 22°F(-6°C) | 0.8 in(20 mm) | 70% | 2.0 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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