Climate averages 1991–2020
Hongwŏn weather
in September.
A mild, wet month: the 4th warmest and the 10th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
September is a mild month in Hongwŏn: daytime highs average 21.7°C and nights cool to about 15.4°C. By daytime temperature it is the 4th warmest of the 12 months.
Expect about 102 mm of rain on roughly 8 days, which makes September a wet month (the 10th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 12 h 30 min on an average September day.
The nearest other city in this atlas is Sinp’o (20 km away). In September its highs average 21.2°C, 0.6°C cooler than Hongwŏn, with 101 mm of rain.
Among the 38 cities listed in North Korea, Hongwŏn ranks 32nd of 38 for the warmest September highs and joint 22nd of 38 for the driest September (rainfall, lowest first). The mean September high of those 38 cities is 23.2°C; Hongwŏn is 1.5°C cooler than that mean.
From September to October, average highs fall by 5.4°C to 16.3°C, and monthly rainfall falls from 102 mm to 51 mm.
The annual picture
September 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
Hongwŏn climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -0.2°C-9.2°C | -9.2°C | 30 | 5.8 | 9.710 h |
| February | 1.8°C-7.4°C | -7.4°C | 25 | 5.2 | 10.711 h |
| March | 6.8°C-1.8°C | -1.8°C | 30 | 5.3 | 11.912 h |
| April | 13.3°C3.9°C | 3.9°C | 46 | 6.2 | 13.213 h |
| May | 18.4°C10.1°C | 10.1°C | 74 | 7.4 | 14.414 h |
| June | 22.0°C15.3°C | 15.3°C | 74 | 7.0 | 15.015 h |
| July | 25.0°C19.7°C | 19.7°C | 172 | 12.2 | 14.715 h |
| August | 25.5°C20.4°C | 20.4°C | 182 | 12.3 | 13.814 h |
| September, selected | 21.7°C15.4°C | 15.4°C | 102 | 8.3 | 12.512 h |
| October | 16.3°C8.7°C | 8.7°C | 51 | 6.8 | 11.211 h |
| November | 8.7°C1.6°C | 1.6°C | 56 | 8.0 | 10.010 h |
| December | 2.1°C-5.6°C | -5.6°C | 35 | 6.5 | 9.49 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
September in nearby cities
- Sinp’o in SeptemberNorth Korea · 20 kmHigh 21.2°C · Low 16.4°C · 101 mm rain
- Hŭngnam in SeptemberNorth Korea · 34 kmHigh 21.9°C · Low 16.1°C · 115 mm rain
- Hamhŭng in SeptemberNorth Korea · 38 kmHigh 21.9°C · Low 14.5°C · 131 mm rain
- Changam-ch’on in SeptemberNorth Korea · 95 kmHigh 22.5°C · Low 13.9°C · 103 mm rain
- Wŏnsan in SeptemberNorth Korea · 106 kmHigh 22.7°C · Low 16.3°C · 151 mm rain
- Tŏkch’ŏn in SeptemberNorth Korea · 148 kmHigh 23.5°C · Low 14.2°C · 124 mm rain
- Hyesan in SeptemberNorth Korea · 154 kmHigh 19.7°C · Low 8.8°C · 70 mm rain
- Kanggye in SeptemberNorth Korea · 156 kmHigh 21.9°C · Low 11.5°C · 95 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 Hongwŏn) is explained once on the Hongwŏn year overview and on the Sources, method and limits page.