The best times to visit Ajigasawa for ideal weather are

May 14th to October 28th

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



Other Ajigasawa Travel Info

Weather in Ajigasawa


Average temperatures in Ajigasawa 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 25th 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 Ajigasawa, 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 82°F (27.8°C) with temperatures rarely dropping below 69.3°F (20.7°C) at night.

Ajigasawa Temperatures (Fahrenheit)


Ajigasawa Temperatures (Celsius)


“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.

Ajigasawa Perceived Temperature (F)


Ajigasawa Perceived Temperature (C)



Average Ajigasawa 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 35.5 31.4 26.7
Feb 37 32.4 27.1
Mar 43.5 37.5 31.2
Apr 54.4 47 38.8
May 63.6 55.9 48.7
Jun 71.8 64.2 57.2
Jul 77.8 71.3 65.4
Aug 80.8 74 67.7
Sep 75 67.3 60.2
Oct 63.5 56.7 49.4
Nov 51.8 46.4 40
Dec 41.1 36.4 30.8

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 1.9 -0.3 -2.9
Feb 2.8 0.2 -2.7
Mar 6.4 3.1 -0.4
Apr 12.4 8.3 3.8
May 17.6 13.3 9.3
Jun 22.1 17.9 14
Jul 25.4 21.8 18.6
Aug 27.1 23.3 19.8
Sep 23.9 19.6 15.7
Oct 17.5 13.7 9.7
Nov 11 8 4.4
Dec 5.1 2.4 -0.7



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Ajigasawa are June, August, and then April. Note that we define “significant precipitation” as .1 inches or more in this section. The lowest chance of rain or snow occurs around late May to early June. For example, on the week of May 28th there is 1 day of precipitation on average. By contrast, it’s most likely to rain or snow in early January with an average of 3 days of significant precipitation the week of January 1st.

When can you find snow in Ajigasawa? 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 Ajigasawa.

Days with precipitation

Snow on the Ground

The graph below shows the average snow on the ground in Ajigasawa (in).

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 38% 0 3.9
Feb 34% 0 2.9
Mar 29% 0 3.3
Apr 25% 0 3.8
May 25% 0 4.2
Jun 23% 0 3.4
Jul 27% 0 7.2
Aug 25% 0 8.3
Sep 34% 0 7
Oct 31% 0 5.8
Nov 43% 0 7.2
Dec 44% 0 5.2

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 38 0 9.9
Feb 34 0 7.4
Mar 29 0 8.4
Apr 25 0 9.7
May 25 0 10.7
Jun 23 0 8.6
Jul 27 0 18.3
Aug 25 0 21.1
Sep 34 0 17.8
Oct 31 0 14.7
Nov 43 0 18.3
Dec 44 0 13.2


Humidity and Wind

Ajigasawa has some very humid months, with other comfortably humid months. The least humid month is February (54.3% relative humidity), and the most humid month is July (79%).

Wind in Ajigasawa is usually moderate. The windiest month is December, followed by January and February. December’s average wind speed of around 10.2 knots (11.7 MPH or 18.9 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 late December where average top sustained speeds reach 18.7 knots, which is considered a fresh breeze.

Relative Humidity (%)

The graph below shows the average % humidity by month in Ajigasawa.

Avg. Relative Humidity


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

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 9.9 Gentle breeze 16 Significant breeze
Feb 9.6 Gentle breeze 15.7 Significant breeze
Mar 8.6 Gentle breeze 14.4 Significant breeze
Apr 7.4 Gentle breeze 13 Significant breeze
May 6.4 Light breeze 11.9 Significant breeze
Jun 4.8 Light breeze 9.6 Gentle breeze
Jul 5.1 Light breeze 9.9 Significant breeze
Aug 5 Light breeze 9.2 Gentle breeze
Sep 5.4 Light breeze 9.8 Significant breeze
Oct 6.8 Light breeze 11.8 Significant breeze
Nov 8.1 Gentle breeze 13.8 Significant breeze
Dec 10.2 Gentle breeze 16.8 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 56.8%
Feb 54.3%
Mar 56.5%
Apr 56%
May 67.7%
Jun 73.6%
Jul 79%
Aug 77.4%
Sep 71.7%
Oct 63.3%
Nov 60.9%
Dec 58.6%


Is it Safe to Travel to Ajigasawa?

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 Ajigasawa, Japan is January, followed by March and April. 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 Ajigasawa in December. Those willing to visit at these times will likely find it the least expensive month.

Estimated Tourism by Month


Most Popular Months to Visit

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 73.3 in December means 73.3% of the tourists vs. January.



Overall Ajigasawa Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 68.9°F (20.5°C) and 39.3°F (4.1°C) with warmer temperatures in the later months. Rain is somewhat common with 7 to 9 days of significant precipitation per month. Spring is the busiest for tourism, which makes it a good time for those looking for things to do.

Summer (June through August)

The middle-year months have very comfortable weather with high temperatures that are comfortable. These months see the least precipitation with 7 to 8 days of precipitation per month. June – August is fairly slow season for tourism in Ajigasawa, so lodging and other accommodations may cost slightly less.

Fall (September through November)

Fall daily highs range from 78.4°F (25.8°C) and 46.9°F (8.3°C), which will feel comfortable given the humidity and wind. It rains or snows a good amount: 10 to 13 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 Ajigasawa to be enjoyable for warm weather travelers. The average high during this season is between 44°F (6.7°C) and 33.5°F (0.8°C). On average, it rains or snows a great amount: 10 to 14 times per month. These times of year are the second busiest with tourists.


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