Climate averages 1991–2020
Seongnam-si weather
in July.
A warm, very wet month: the 2nd warmest and the wettest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a warm month in Seongnam-si: daytime highs average 27.8°C and nights cool to about 21.3°C. By daytime temperature it is the 2nd warmest of the 12 months.
Expect about 340 mm of rain on roughly 17 days, which makes July a very wet month (the wettest month of the year). Daylight, from sunrise to sunset, lasts about 14 h 28 min on an average July day.
The nearest other city in this atlas is Gwangju, South Korea (11 km away). In July its highs average 28.5°C, 0.6°C warmer than Seongnam-si, with 340 mm of rain.
Among the 79 cities listed in South Korea, Seongnam-si ranks joint 44th of 79 for the warmest July highs and joint 74th of 79 for the driest July (rainfall, lowest first). The mean July high of those 79 cities is 27.8°C; Seongnam-si is level with that mean.
From July to August, average highs rise by 0.6°C to 28.4°C, and monthly rainfall falls from 340 mm to 277 mm.
The annual picture
July 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 | 26.1°C16.9°C | 16.9°C | 134 | 9.3 | 14.715 h |
| July, selected | 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
July in nearby cities
- Gwangju, South Korea in JulySouth Korea · 11 kmHigh 28.5°C · Low 21.6°C · 340 mm rain
- Hanam in JulySouth Korea · 13 kmHigh 28.2°C · Low 21.4°C · 340 mm rain
- Guri-si in JulySouth Korea · 18 kmHigh 28.1°C · Low 21.4°C · 340 mm rain
- Wabu in JulySouth Korea · 18 kmHigh 28.0°C · Low 21.3°C · 340 mm rain
- Anyang-si in JulySouth Korea · 19 kmHigh 27.2°C · Low 21.4°C · 314 mm rain
- Seoul in JulySouth Korea · 20 kmHigh 27.9°C · Low 21.4°C · 314 mm rain
- Suwon in JulySouth Korea · 20 kmHigh 27.7°C · Low 21.3°C · 279 mm rain
- Gwangmyeong in JulySouth Korea · 24 kmHigh 27.5°C · Low 21.5°C · 298 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.