Climate averages 1991–2020
Hyesan weather
in May.
A mild, wet month: the 5th warmest and the 9th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
May is a mild month in Hyesan: daytime highs average 18.0°C and nights cool to about 5.5°C. By daytime temperature it is the 5th warmest of the 12 months.
Expect about 95 mm of rain on roughly 15 days, which makes May a wet month (the 9th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 29 min on an average May day.
The nearest other city in this atlas is Changam-ch’on (102 km away). In May its highs average 20.0°C, 2.0°C warmer than Hyesan, with 69 mm of rain.
Among the 38 cities listed in North Korea, Hyesan ranks 33rd of 38 for the warmest May highs and joint 25th of 38 for the driest May (rainfall, lowest first). The mean May high of those 38 cities is 20.2°C; Hyesan is 2.3°C cooler than that mean.
From May to June, average highs rise by 4.3°C to 22.3°C, and monthly rainfall rises from 95 mm to 97 mm.
The annual picture
May 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
Hyesan climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -8.0°C-20.9°C | -20.9°C | 10 | 3.1 | 9.610 h |
| February | -4.2°C-17.6°C | -17.6°C | 18 | 4.6 | 10.611 h |
| March | 2.3°C-9.2°C | -9.2°C | 33 | 7.9 | 11.912 h |
| April | 11.0°C-0.4°C | -0.4°C | 56 | 10.5 | 13.313 h |
| May, selected | 18.0°C5.5°C | 5.5°C | 95 | 14.9 | 14.514 h |
| June | 22.3°C11.2°C | 11.2°C | 97 | 15.5 | 15.115 h |
| July | 24.9°C15.4°C | 15.4°C | 164 | 17.3 | 14.815 h |
| August | 24.4°C15.1°C | 15.1°C | 136 | 14.2 | 13.814 h |
| September | 19.7°C8.8°C | 8.8°C | 70 | 7.9 | 12.513 h |
| October | 12.1°C1.3°C | 1.3°C | 43 | 7.6 | 11.111 h |
| November | 2.5°C-7.5°C | -7.5°C | 38 | 7.7 | 9.910 h |
| December | -6.0°C-18.0°C | -18.0°C | 18 | 5.2 | 9.29 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
May in nearby cities
- Changam-ch’on in MayNorth Korea · 102 kmHigh 20.0°C · Low 9.3°C · 69 mm rain
- Hwasŏng in MayNorth Korea · 111 kmHigh 18.9°C · Low 8.1°C · 73 mm rain
- Myŏnggan-dong in MayNorth Korea · 114 kmHigh 18.4°C · Low 8.0°C · 73 mm rain
- Ŏrang in MayNorth Korea · 123 kmHigh 16.8°C · Low 8.3°C · 78 mm rain
- Chongjin in MayNorth Korea · 140 kmHigh 15.1°C · Low 7.9°C · 96 mm rain
- Kanggye in MayNorth Korea · 142 kmHigh 20.0°C · Low 8.0°C · 109 mm rain
- Helong in MayChina · 144 kmHigh 19.5°C · Low 6.8°C · 100 mm rain
- Sinp’o in MayNorth Korea · 151 kmHigh 16.7°C · Low 10.6°C · 76 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 Hyesan) is explained once on the Hyesan year overview and on the Sources, method and limits page.