The best times to visit Minamiaizu for ideal weather are

June 4th to September 30th

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



Other Minamiaizu Travel Info

Weather in Minamiaizu


Average temperatures in Minamiaizu 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 24th 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 Minamiaizu, the hottest months are August, July, and then September. See average monthly temperatures below. The warmest time of year is generally mid August where highs are regularly around 75.8°F (24.3°C) with temperatures rarely dropping below 60.9°F (16.1°C) at night.

Minamiaizu Temperatures (Fahrenheit)


Minamiaizu 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.

Minamiaizu Perceived Temperature (F)


Minamiaizu Perceived Temperature (C)



Average Minamiaizu 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 30.8 24.3 16.4
Feb 32.9 25.6 16.8
Mar 39.4 31.6 22.8
Apr 49.2 40.5 30.9
May 59.8 50.5 40.9
Jun 64.6 57.1 49.7
Jul 72.1 65 58.6
Aug 73.7 66.1 59.6
Sep 66.6 59.3 52.3
Oct 56.9 49.3 41.3
Nov 47.2 39.7 31.8
Dec 36.6 30 22.5

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan -0.7 -4.3 -8.7
Feb 0.5 -3.6 -8.4
Mar 4.1 -0.2 -5.1
Apr 9.6 4.7 -0.6
May 15.4 10.3 4.9
Jun 18.1 13.9 9.8
Jul 22.3 18.3 14.8
Aug 23.2 18.9 15.3
Sep 19.2 15.2 11.3
Oct 13.8 9.6 5.2
Nov 8.4 4.3 -0.1
Dec 2.6 -1.1 -5.3



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Minamiaizu are January, November, and then February. 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 are no days of precipitation on average. By contrast, it’s most likely to rain or snow in mid to late August with an average of 4 days of significant precipitation the week of August 20th.

When can you find snow in Minamiaizu? 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 Minamiaizu.

Days with precipitation

Snow on the Ground

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

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 10% 0 1.7
Feb 19% 0 2.4
Mar 24% 0 3.9
Apr 34% 0 7.7
May 32% 0 8
Jun 43% 0 11.4
Jul 42% 0 11.5
Aug 43% 0 10.1
Sep 35% 0 16.5
Oct 29% 0 7.8
Nov 19% 0 3.7
Dec 19% 0 3.5

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 10 0 4.3
Feb 19 0 6.1
Mar 24 0 9.9
Apr 34 0 19.6
May 32 0 20.3
Jun 43 0 29
Jul 42 0 29.2
Aug 43 0 25.7
Sep 35 0 41.9
Oct 29 0 19.8
Nov 19 0 9.4
Dec 19 0 8.9


Humidity and Wind

Minamiaizu has some extremely humid months, with other comfortably humid months. The least humid month is January (52.8% relative humidity), and the most humid month is August (85.6%).

Wind in Minamiaizu is usually calm. The windiest month is January, followed by December and February. January’s average wind speed of around 8.5 knots (9.8 MPH or 15.7 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 17.9 knots, which is considered a fresh breeze.

Relative Humidity (%)

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

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 8.5 Gentle breeze 16.1 Significant breeze
Feb 8.2 Gentle breeze 16.1 Significant breeze
Mar 8 Gentle breeze 15.6 Significant breeze
Apr 6.6 Light breeze 13.1 Significant breeze
May 6 Light breeze 11.7 Significant breeze
Jun 4.5 Light breeze 8.5 Gentle breeze
Jul 4.4 Light breeze 8.5 Significant breeze
Aug 4.2 Light breeze 7.9 Gentle breeze
Sep 4.6 Light breeze 8.9 Significant breeze
Oct 5.3 Light breeze 10.5 Gentle breeze
Nov 6.8 Light breeze 13.2 Significant breeze
Dec 8.5 Gentle breeze 16 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 52.8%
Feb 55.8%
Mar 56.7%
Apr 61.4%
May 63.5%
Jun 83.1%
Jul 85.5%
Aug 85.6%
Sep 83.4%
Oct 76.5%
Nov 66.2%
Dec 59.4%


Is it Safe to Travel to Minamiaizu?

Our best data indicates this area is generally safe. As of Dec 04, 2023 there are no travel advisories or warnings for Japan; exercise normal security precautions. Check this page for any recent changes or regions to avoid: Travel Advice and Advisories. This advisory was last updated on Nov 14, 2023.


The Busiest and Least Crowded Months

The busiest month for tourism in Minamiaizu, 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 Minamiaizu 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 Minamiaizu Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderately cold. Highs range from 62.7°F (17.1°C) and 35.5°F (1.9°C) with warmer temperatures in the later months. Rain is somewhat common with 7 to 10 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 comfortably cool weather with high temperatures that are comfortable. These months see the most precipitation with about 13 days of precipitation per month. June – August is fairly slow season for tourism in Minamiaizu, so lodging and other accommodations may cost slightly less.

Fall (September through November)

Fall daily highs range from 69.7°F (20.9°C) and 43°F (6.1°C), which will feel chilly given the humidity and wind. It rains or snows a significant amount: 6 to 11 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 Minamiaizu to be enjoyable for warm weather travelers. The average high during this season is between 39.7°F (4.3°C) and 30.2°F (-1°C). On average, it rains or snows a fair amount: 3 to 6 times per month. These times of year are the second busiest with tourists.


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