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The rocky, bare summit of Chausu-dake in the Nasu mountains, with green slopes and small hikers below

Photo: Nasudake05.JPG by Mass Ave 975 (CC BY-SA 3.0, cropped), via Wikimedia Commons.

Nasu weather by month: temperature, rain and what to wear

Nasu's average high runs from 1.9°C (35°F) in January to 25.4°C (78°F) in August (JMA, 1991–2020). The wettest month is July (305.7 mm) and the driest is February (42.8 mm).

When to go to Nasu, by the numbers

  • No month has average highs between 15°C and 25°C with fewer than 10 wet days.
  • Fewest wet days: February (8.3 days) and November (8.3 days).
  • Quietest hotels in 2025 (Tochigi Prefecture): January (43.0%), February (48.0%) and December (51.2%).
  • Busiest hotels in 2025 (Tochigi Prefecture): August (64.2%), November (63.4%) and October (62.8%).

What to wear in Nasu, month by month

Nasu: our clothing level for each month (from the JMA's averages)
MonthLevelAverage highWet days
JanuaryFreezing1.9°C9.1 days
FebruaryFreezing2.7°C8.3 days
MarchCold6.8°C10.4 days
AprilChilly13.0°C11.3 days
MayCool18.2°C12.1 days
JuneMild20.7°C15.9 days
JulyMild24.3°C18.3 days
AugustWarm25.4°C17.0 days
SeptemberMild21.4°C14.8 days
OctoberCool16.1°C11.5 days
NovemberChilly10.9°C8.3 days
DecemberCold5.1°C9.1 days

How busy Nasu is, month by month

How full hotels across Tochigi Prefecture were, month by month in 2025 (%)

Average room occupancy for all hotels and inns (Japan Tourism Agency).

  1. Jan43.0%
  2. Feb48.0%
  3. Mar54.9%
  4. Apr54.7%
  5. May55.3%
  6. Jun51.5%
  7. Jul56.3%
  8. Aug64.2%
  9. Sep56.9%
  10. Oct62.8%
  11. Nov63.4%
  12. Dec51.2%

Frequently asked questions

When is the best time to visit Nasu?

No month has average highs between 15°C and 25°C with fewer than 10 wet days. Fewest wet days: February (8.3 days) and November (8.3 days).

What is the hottest month in Nasu?

August has the highest average high, 25.4°C (78°F). January has the lowest, 1.9°C (35°F) (JMA, 1991–2020).

What is the rainiest month in Nasu?

July has the most precipitation (305.7 mm), and July has the most wet days (18.3 days) (JMA, 1991–2020).

Nasu weather month by month

Averages for 1991–2020 at the JMA's Nasu Kogen station (749 m above sea level). Months with their own page are linked; the others follow.

Nasu by month: averages for 1991–2020 (JMA)
MonthHighLowPrecipitationWet daysSunshine
January1.9°C−5.3°C52.6 mm9.1 days131 hours
February2.7°C−5.3°C42.8 mm8.3 days129 hours
March6.8°C−2.4°C101.6 mm10.4 days156 hours
April13.0°C2.6°C139.6 mm11.3 days170 hours
May18.2°C7.7°C180.8 mm12.1 days169 hours
June20.7°C12.3°C220.5 mm15.9 days109 hours
July24.3°C16.7°C305.7 mm18.3 days99 hours
August25.4°C17.5°C303.9 mm17.0 days115 hours
September21.4°C13.8°C305.3 mm14.8 days99 hours
October16.1°C7.7°C212.6 mm11.5 days115 hours
November10.9°C2.0°C89.2 mm8.3 days130 hours
December5.1°C−2.6°C60.1 mm9.1 days133 hours
Average high in Nasu, month by month (°C)
  1. Jan1.9°C
  2. Feb2.7°C
  3. Mar6.8°C
  4. Apr13.0°C
  5. May18.2°C
  6. Jun20.7°C
  7. Jul24.3°C
  8. Aug25.4°C
  9. Sep21.4°C
  10. Oct16.1°C
  11. Nov10.9°C
  12. Dec5.1°C

Events in Nasu through the year

Events in Nasu: dates from each organizer's official page
EventMonthWhen
Nasu Winter Market那須冬市 -NASU WINTER MARKET-FebLate February, two days (held 22-23 February in 2026) Official page
Nasu Short Film Festival 2026那須ショートフィルムフェスティバル2026NovEarly to mid November. 7–15 November 2026. Official page
Ashino Rice Market 2026芦野コメ市2026Nov7 November Official page
Nasu Ropeway sunrise operation日の出運行NovTwo Sundays in early November (1 and 8 November in 2026) Official page

Related items

Nasu in JanuaryFreezingA heavy winter coat, thermals, hat and gloves.High1.9°CLow−5.3°CPrecipitation52.6 mmWet days9.1 daysNasu in FebruaryFreezingA heavy winter coat, thermals, hat and gloves.High2.7°CLow−5.3°CPrecipitation42.8 mmWet days8.3 daysNasu in MarchColdA winter coat over layers, and a scarf.High6.8°CLow−2.4°CPrecipitation101.6 mmWet days10.4 daysNasu in AprilChillyA warm jacket or light coat over a sweater.High13.0°CLow2.6°CPrecipitation139.6 mmWet days11.3 days

Back to Japan by month

Read more

Sources for this page

  1. Normals for 1991–2020: Nasu Kogen (那須高原), month by month (平年値 年・月ごとの値)Japan Meteorological Agency (JMA)
  2. Normals for 1991–2020: Nasu Kogen (那須高原), rain days, temperature days and snow (詳細)Japan Meteorological Agency (JMA)
  3. Overnight Travel Statistics Survey, 2025 final figures (宿泊旅行統計調査 2025年 年の確定値)Japan Tourism Agency
  4. Nasu Winter Market (那須冬市 -NASU WINTER MARKET-)Nasu Town Tourism Association
  5. Nasu Short Film Festival 2026 (那須ショートフィルムフェスティバル2026)Nasu Town Tourism Association (event calendar)
  6. Ashino Rice Market 2026 (芦野コメ市2026)Nasu Town Tourism Association (event calendar)
  7. Nasu Ropeway sunrise operation (日の出運行)Nasu Town Tourism Association (event calendar)