| Month | High | Low | Rain | Wet days | Score |
|---|---|---|---|---|---|
| January | -8.4° | -23.4° | — | — | 24 |
| February | -2.8° | -19.7° | 8.9mm | 10 | 10 |
| March | 4.4° | -9.6° | 17.2mm | 14 | 7 |
| April | 13.6° | -1.3° | 30.3mm | 10 | 55 |
| May | 20.8° | 4.6° | — | — | 94 |
| June | 25.3° | 11° | 92.7mm | 17 | 70 |
| July | 27.7° | 15.2° | 151mm | 16 | 67 |
| August | 26.9° | 13.9° | 67.3mm | 13 | 74 |
| September | 21.9° | 7.3° | — | — | 94 |
| October | 14.9° | -2.3° | — | — | 71 |
| November | 3° | -9.6° | — | — | 25 |
| December | -6.3° | -20.3° | — | — | 24 |
January in Hyesan-dong averages a daily high of -8.4°C with nights around -23.4°C. A hard month to visit for comfort alone.
February in Hyesan-dong averages a daily high of -2.8°C with nights around -19.7°C. Expect roughly 10 wet days totalling 8.9mm. A hard month to visit for comfort alone.
March in Hyesan-dong averages a daily high of 4.4°C with nights around -9.6°C. Expect roughly 14 wet days totalling 17.2mm. A hard month to visit for comfort alone.
April in Hyesan-dong averages a daily high of 13.6°C with nights around -1.3°C. Expect roughly 10 wet days totalling 30.3mm. Generally workable, with some weather to plan around.
May in Hyesan-dong averages a daily high of 20.8°C with nights around 4.6°C. Comfortable conditions for being outdoors all day.
June in Hyesan-dong averages a daily high of 25.3°C with nights around 11°C. Expect roughly 17 wet days totalling 92.7mm. Generally workable, with some weather to plan around.
July in Hyesan-dong averages a daily high of 27.7°C with nights around 15.2°C. Expect roughly 16 wet days totalling 151mm. Generally workable, with some weather to plan around.
August in Hyesan-dong averages a daily high of 26.9°C with nights around 13.9°C. Expect roughly 13 wet days totalling 67.3mm. Generally workable, with some weather to plan around.
September in Hyesan-dong averages a daily high of 21.9°C with nights around 7.3°C. Comfortable conditions for being outdoors all day.
October in Hyesan-dong averages a daily high of 14.9°C with nights around -2.3°C. Generally workable, with some weather to plan around.
November in Hyesan-dong averages a daily high of 3°C with nights around -9.6°C. A hard month to visit for comfort alone.
December in Hyesan-dong averages a daily high of -6.3°C with nights around -20.3°C. A hard month to visit for comfort alone.
Each month scores out of 100. It starts at 100 and loses points for daytime highs outside a 20–27°C band, for wet days, and for nights below 2°C. Nothing else is weighted in — no crowd data, no prices, no opinion. Hyesan-dong peaks at 94.
Based on 30 years of records, May scores highest for comfort in Hyesan-dong, balancing daytime temperature against rainfall.
July is the warmest, averaging a daily high of 27.7°C.
July is the wettest, averaging 151mm of rain across roughly 16 wet days.
January is the coolest month, with average daily highs around -8.4°C.