The best times to visit Aso Kuju National Park for ideal weather are

May 14th to October 21st

based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.

 

 


Other Aso Kuju National Park Travel Info

Weather in Aso Kuju National Park

Temperature

Average temperatures in Aso Kuju National Park vary drastically. Considering humidity, temperatures feel cold for about half of the year and otherwise nice with a chance of rain or snow throughout most of the year. The area is less temperate than some — in the 28th percentile for pleasant weather — compared to tourist destinations worldwide. Weeks with ideal weather are listed above. If you’re looking for the very warmest time to visit Aso Kuju National Park, the hottest months are August, July, and then September. See average monthly temperatures below. The warmest time of year is generally early to mid August where highs are regularly around 77.1°F (25.1°C) with temperatures rarely dropping below 65.8°F (18.8°C) at night.

Aso Kuju National Park Temperatures (Fahrenheit)

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High
Average
Low

Aso Kuju National Park Temperatures (Celsius)

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High
Average
Low

“Feels-Like” Temperatures

The way we experience weather isn’t all about temperature. Higher temperatures affect us much more at higher humidity, and colder temperatures feel piercing with high winds. Our perceived temperatures factor in humidity and wind chill to better represent how hot or cold the day feels to a person.

Aso Kuju National Park Perceived Temperature (F)

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High
Average
Low

Aso Kuju National Park Perceived Temperature (C)

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High
Average
Low

 

Average Aso Kuju National Park Temperatures by Month

Daily highs (averaged for the month) usually give the best indication of the weather. A significantly lower mean and low generally just means it gets colder at night.

Show Fahrenheit

Month Avg. High (°F) Avg. Mean (°F) Avg. Low (°F)
Jan 35 29.3 22.6
Feb 40.1 33.4 25.4
Mar 46.9 38.9 30.4
Apr 55.6 47.1 38.7
May 64.9 56.6 48.6
Jun 67.7 62 57
Jul 74.2 68.2 63.6
Aug 75.9 69.2 64.7
Sep 71.6 64.3 59
Oct 62.3 54.9 48.1
Nov 50.5 43.5 36.6
Dec 38.5 32.5 25.8

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 1.7 -1.5 -5.2
Feb 4.5 0.8 -3.7
Mar 8.3 3.8 -0.9
Apr 13.1 8.4 3.7
May 18.3 13.7 9.2
Jun 19.8 16.7 13.9
Jul 23.4 20.1 17.6
Aug 24.4 20.7 18.2
Sep 22 17.9 15
Oct 16.8 12.7 8.9
Nov 10.3 6.4 2.6
Dec 3.6 0.3 -3.4

 


 

Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Aso Kuju National Park are January, November, and then December. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around early January. For example, on the week of January 1st there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in mid June with an average of 5 days of significant precipitation the week of June 18th.

When can you find snow in Aso Kuju National Park? Weather stations report no annual snow. Please note that a value of 0 for snow in the graph below may either mean there was no snow, or that snow is unreported.

Chance of Precipitation

The graph below shows the % chance of rainy and snowy days in Aso Kuju National Park.

Key
Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Aso Kuju National Park (in).

Key
Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 18% 0 3.4
Feb 28% 0 6.2
Mar 31% 0 7.6
Apr 31% 0 7.6
May 31% 0 9.1
Jun 52% 0 26.1
Jul 47% 0 22.7
Aug 45% 0 13.3
Sep 32% 0 8.8
Oct 24% 0 7.1
Nov 22% 0 4.3
Dec 24% 0 4

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 18 0 8.6
Feb 28 0 15.7
Mar 31 0 19.3
Apr 31 0 19.3
May 31 0 23.1
Jun 52 0 66.3
Jul 47 0 57.7
Aug 45 0 33.8
Sep 32 0 22.4
Oct 24 0 18
Nov 22 0 10.9
Dec 24 0 10.2

 

Humidity and Wind

Aso Kuju National Park has some extremely humid months, and above average humidity throughout the year. The least humid month is May (62% relative humidity), and the most humid month is July (87.9%).

Wind in Aso Kuju National Park is usually moderate. The windiest month is March, followed by April and July. March’s average wind speed of around 9.5 knots (11 MPH or 17.6 KPH) is considered “a gentle breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early July where average top sustained speeds reach 17 knots, which is considered a fresh breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Aso Kuju National Park.

Key
Avg. Relative Humidity

Wind

The graph below shows wind speed (max and average) in knots.

Key
Max Sustained Wind
Average Daily Wind

Average Wind Speeds

Show Wind Speeds

All wind speeds are in knots. 1 knot = 1.15 MPH or 1.85 KPH.

Month Avg. Wind Avg. Wind Feel Sustained High Wind High Wind Feel
Jan 9 Gentle breeze 14.5 Significant breeze
Feb 9 Gentle breeze 15.3 Significant breeze
Mar 9.5 Gentle breeze 16 Significant breeze
Apr 9.5 Gentle breeze 15.9 Significant breeze
May 8.7 Gentle breeze 14.8 Significant breeze
Jun 8.9 Gentle breeze 15 Significant breeze
Jul 9.2 Gentle breeze 15 Significant breeze
Aug 8.6 Gentle breeze 13.8 Significant breeze
Sep 8.3 Gentle breeze 13.9 Significant breeze
Oct 8.7 Gentle breeze 14.8 Significant breeze
Nov 8.2 Gentle breeze 14 Significant breeze
Dec 9 Gentle breeze 14.9 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 76.3%
Feb 72.3%
Mar 65.5%
Apr 64.2%
May 62%
Jun 84.6%
Jul 87.9%
Aug 85.3%
Sep 80.1%
Oct 74.2%
Nov 76.3%
Dec 79%

 

Is it Safe to Travel to Aso Kuju National Park?

Our best data indicates this area is generally safe, except in a few regions. As of Oct 07, 2019 there are regional travel advisories for Japan; exercise normal security precautions and avoid some areas. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Oct 01, 2019.


 

The Busiest and Least Crowded Months

The busiest month for tourism in Aso Kuju National Park, Japan is February, followed by March and July. Prices for hotels and flights will be most expensive during these months, though you can save if you purchase well in advance. Tourists are unlikely to visit Aso Kuju National Park in October. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month

 

Most Popular Months to Visit

Key
Tourists Seeking Accommodations

Tourism graph is based on Google searches for services used by tourists relative to the rest of the year. Tourism data for this area is extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 48 in October means 48% of the tourists vs. February.

 

 

Overall Aso Kuju National Park Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 66.6°F (19.2°C) and 41.9°F (5.5°C) with warmer temperatures in the later months. Rain is somewhat common with 9 to 10 days of significant precipitation per month. Spring is fairly slow for tourism, which makes it a good time for those looking for deals.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see the most precipitation with 14 to 16 days of precipitation per month. June – August is the busiest season for tourism in Aso Kuju National Park, so lodging and other accommodations may cost more than usual.

Fall (September through November)

Fall daily highs range from 74°F (23.3°C) and 46.6°F (8.1°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 6 to 10 days per month. Tourism is the slowest during these months due to the weather, so hotels may be affordably priced.

Winter (December through February)

Weather is far too cold this time of year in Aso Kuju National Park to be enjoyable for warm weather travelers. The average high during this season is between 45.3°F (7.4°C) and 33.7°F (0.9°C). On average, it rains or snows a fair amount: 5 to 8 times per month. These times of year are the second busiest with tourists.

 

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