Climate averages 1991–2020
Seongnam-si weather
in June.
A warm, wet month: the 3rd warmest and the joint 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
June is a warm month in Seongnam-si: daytime highs average 26.1°C and nights cool to about 16.9°C. By daytime temperature it is the 3rd warmest of the 12 months.
Expect about 134 mm of rain on roughly 9 days, which makes June a wet month (the joint 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 42 min on an average June day.
The nearest other city in this atlas is Gwangju, South Korea (11 km away). In June its highs average 26.9°C, 0.8°C warmer than Seongnam-si, with 134 mm of rain.
Among the 79 cities listed in South Korea, Seongnam-si ranks joint 41st of 79 for the warmest June highs and joint 46th of 79 for the driest June (rainfall, lowest first). The mean June high of those 79 cities is 25.7°C; Seongnam-si is 0.4°C warmer than that mean.
From June to July, average highs rise by 1.7°C to 27.8°C, and monthly rainfall rises from 134 mm to 340 mm.
The annual picture
June in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Seongnam-si climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | 1.7°C-6.3°C | -6.3°C | 20 | 3.8 | 9.910 h |
| February | 4.5°C-4.5°C | -4.5°C | 29 | 4.2 | 10.811 h |
| March | 9.9°C-0.4°C | -0.4°C | 43 | 6.4 | 11.912 h |
| April | 16.4°C5.4°C | 5.4°C | 79 | 7.3 | 13.113 h |
| May | 21.8°C11.3°C | 11.3°C | 104 | 8.5 | 14.214 h |
| June, selected | 26.1°C16.9°C | 16.9°C | 134 | 9.3 | 14.715 h |
| July | 27.8°C21.3°C | 21.3°C | 340 | 17.2 | 14.514 h |
| August | 28.4°C21.9°C | 21.9°C | 277 | 15.7 | 13.614 h |
| September | 24.5°C16.5°C | 16.5°C | 134 | 8.4 | 12.512 h |
| October | 18.5°C9.2°C | 9.2°C | 58 | 5.5 | 11.311 h |
| November | 10.8°C2.1°C | 2.1°C | 50 | 7.2 | 10.210 h |
| December | 3.7°C-4.3°C | -4.3°C | 25 | 4.7 | 9.610 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
June in nearby cities
- Gwangju, South Korea in JuneSouth Korea · 11 kmHigh 26.9°C · Low 17.3°C · 134 mm rain
- Hanam in JuneSouth Korea · 13 kmHigh 26.6°C · Low 17.2°C · 134 mm rain
- Guri-si in JuneSouth Korea · 18 kmHigh 26.6°C · Low 17.3°C · 134 mm rain
- Wabu in JuneSouth Korea · 18 kmHigh 26.5°C · Low 17.1°C · 134 mm rain
- Anyang-si in JuneSouth Korea · 19 kmHigh 25.0°C · Low 17.0°C · 126 mm rain
- Seoul in JuneSouth Korea · 20 kmHigh 26.3°C · Low 17.1°C · 126 mm rain
- Suwon in JuneSouth Korea · 20 kmHigh 25.9°C · Low 16.9°C · 118 mm rain
- Gwangmyeong in JuneSouth Korea · 24 kmHigh 25.6°C · Low 17.2°C · 122 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Seongnam-si) is explained once on the Seongnam-si year overview and on the Sources, method and limits page.
Hanam, Guri-si and Wabu lie in the same rainfall cell, so their rainfall figures are identical to these; temperatures differ because they come from smaller 0.1° cells.