When to go · Seosan
Seosan, month by month
The best months for Seosan: Apr, May, Sep, Oct. Months to avoid: Jan, Feb, Jul, Aug.
Month by month
- JanuaryAvoidListed as a month to avoid: Jul–Aug (monsoon rain and heat), Jan–Feb (cold, ice on trails).3.3 °C / -6.2 °C, 8 rain days38 °F / 21 °F, 8 rain daysCrowds: Low · 1 festival or holiday
- FebruaryAvoidListed as a month to avoid: Jul–Aug (monsoon rain and heat), Jan–Feb (cold, ice on trails).5.6 °C / -4.9 °C, 7 rain days42 °F / 23 °F, 7 rain daysCrowds: Medium · 1 festival or holiday
- MarchMixedOutside the best window (Apr–May, Sep–Oct). Across South Korea: Cold start, fine dust peaks; cherry blossom reaches Jeju and Busan late in the month.10.8 °C / -0.7 °C, 8 rain days51 °F / 31 °F, 8 rain daysCrowds: Medium
- AprilGreatInside Seosan's best window: Apr–May, Sep–Oct.17.3 °C / 5 °C, 8 rain days63 °F / 41 °F, 8 rain daysCrowds: High
- MayGreatInside Seosan's best window: Apr–May, Sep–Oct.22.5 °C / 11.4 °C, 9 rain days73 °F / 53 °F, 9 rain daysCrowds: High
- JuneGoodOutside the best window (Apr–May, Sep–Oct). Across South Korea: Warm and green until the monsoon arrives late in the month.26.4 °C / 17 °C, 10 rain days80 °F / 63 °F, 10 rain daysCrowds: Medium
- JulyAvoidListed as a month to avoid: Jul–Aug (monsoon rain and heat), Jan–Feb (cold, ice on trails).28.5 °C / 21.5 °C, 15 rain days83 °F / 71 °F, 15 rain daysCrowds: High
- AugustAvoidListed as a month to avoid: Jul–Aug (monsoon rain and heat), Jan–Feb (cold, ice on trails).29.7 °C / 21.7 °C, 14 rain days85 °F / 71 °F, 14 rain daysCrowds: High
- SeptemberGreatInside Seosan's best window: Apr–May, Sep–Oct.26.1 °C / 16.1 °C, 9 rain days79 °F / 61 °F, 9 rain daysCrowds: Medium · 1 festival or holiday
- OctoberGreatInside Seosan's best window: Apr–May, Sep–Oct.20.5 °C / 8.6 °C, 7 rain days69 °F / 47 °F, 7 rain daysCrowds: High · 1 festival or holiday
- NovemberGoodOutside the best window (Apr–May, Sep–Oct). Across South Korea: Colour moves south to Seoul's palaces early in the month; cold arrives by the end.13 °C / 2.2 °C, 8 rain days55 °F / 36 °F, 8 rain daysCrowds: Medium
- DecemberGoodOutside the best window (Apr–May, Sep–Oct). Across South Korea: Cold and dry; Christmas markets and lights in Seoul; ski season opens.5.7 °C / -3.7 °C, 8 rain days42 °F / 25 °F, 8 rain daysCrowds: Medium