When to go · Mount Aso
Mount Aso, month by month
The best months for Mount Aso: Apr, May, Oct, Nov. Months to avoid: Jan, Feb, Jul, Aug, Sep.
Month by month
- JanuaryAvoidListed as a month to avoid: Jul–Aug (heat and haze), Jan–Feb (ice on trails), typhoon season Sep.8 °C / -2 °C, 7 rain days46 °F / 28 °F, 7 rain daysCrowds: Low · 1 festival or holiday
- FebruaryAvoidListed as a month to avoid: Jul–Aug (heat and haze), Jan–Feb (ice on trails), typhoon season Sep.10 °C / -1 °C, 8 rain days50 °F / 30 °F, 8 rain daysCrowds: Low
- MarchGoodOutside the best window (Apr–May, Oct–early Nov). Across Japan: Blossom arrives late in the month: prices jump, book early.14 °C / 2 °C, 10 rain days57 °F / 36 °F, 10 rain daysCrowds: High · 1 festival or holiday
- AprilGreatInside Mount Aso's best window: Apr–May, Oct–early Nov.19 °C / 7 °C, 10 rain days66 °F / 45 °F, 10 rain daysCrowds: High · 2 festivals or holidays
- MayGreatInside Mount Aso's best window: Apr–May, Oct–early Nov.23 °C / 12 °C, 10 rain days73 °F / 54 °F, 10 rain daysCrowds: Medium · 1 festival or holiday
- JuneMixedOutside the best window (Apr–May, Oct–early Nov). Across Japan: Rainy season in Honshū: grey, humid, fewer tourists; Hokkaidō is at its best.26 °C / 16 °C, 14 rain days79 °F / 61 °F, 14 rain daysCrowds: Low
- JulyAvoidListed as a month to avoid: Jul–Aug (heat and haze), Jan–Feb (ice on trails), typhoon season Sep.29 °C / 20 °C, 13 rain days84 °F / 68 °F, 13 rain daysCrowds: Medium
- AugustAvoidListed as a month to avoid: Jul–Aug (heat and haze), Jan–Feb (ice on trails), typhoon season Sep.30 °C / 21 °C, 11 rain days86 °F / 70 °F, 11 rain daysCrowds: High · 1 festival or holiday
- SeptemberAvoidListed as a month to avoid: Jul–Aug (heat and haze), Jan–Feb (ice on trails), typhoon season Sep.27 °C / 18 °C, 11 rain days81 °F / 64 °F, 11 rain daysCrowds: Medium
- OctoberGreatInside Mount Aso's best window: Apr–May, Oct–early Nov.22 °C / 11 °C, 8 rain days72 °F / 52 °F, 8 rain daysCrowds: Medium
- NovemberGreatInside Mount Aso's best window: Apr–May, Oct–early Nov.16 °C / 5 °C, 7 rain days61 °F / 41 °F, 7 rain daysCrowds: High
- DecemberGoodOutside the best window (Apr–May, Oct–early Nov). Across Japan: Cold and clear until the New Year shutdown from 29 Dec.11 °C / 0 °C, 6 rain days52 °F / 32 °F, 6 rain daysCrowds: Medium · 1 festival or holiday