The best times to visit Sasayama for ideal weather are

April 9th to June 24th

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



Other Sasayama Travel Info

Weather in Sasayama


Average temperatures in Sasayama vary drastically. Considering humidity, temperatures feel nice some of the year, but often too hot in the summer and cold in the winter with a fair chance of precipitation about half of the year. The area is less temperate than some — in the 34th 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 Sasayama, 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 90.9°F (32.7°C) with temperatures rarely dropping below 79.6°F (26.4°C) at night.

Sasayama Temperatures (Fahrenheit)


Sasayama 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.

Sasayama Perceived Temperature (F)


Sasayama Perceived Temperature (C)



Average Sasayama 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 48.6 42.8 36.5
Feb 50.3 44.3 37.6
Mar 56.2 49.7 41.9
Apr 65.1 58.5 50.5
May 74.2 67.3 60.2
Jun 80.1 74.1 68.8
Jul 86.4 80.8 76.1
Aug 89.9 83.6 78.6
Sep 84 77.7 71.8
Oct 74.1 68.1 61.7
Nov 63.1 57.4 51.2
Dec 53.1 47.3 41

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 9.2 6 2.5
Feb 10.2 6.8 3.1
Mar 13.4 9.8 5.5
Apr 18.4 14.7 10.3
May 23.4 19.6 15.7
Jun 26.7 23.4 20.4
Jul 30.2 27.1 24.5
Aug 32.2 28.7 25.9
Sep 28.9 25.4 22.1
Oct 23.4 20.1 16.5
Nov 17.3 14.1 10.7
Dec 11.7 8.5 5



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Sasayama are January, December, and then November. 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 early July with an average of 3 days of significant precipitation the week of July 2nd.

When can you find snow in Sasayama? Weather stations report a very small amount of seasonal snow likely to be deepest around January, especially close to early January. The best time to ski (if at all) in Sasayama is often around around January 1st when fresh powder is deepest. 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 Sasayama.

Days with precipitation

Snow on the Ground

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

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 11% 0.4 1.4
Feb 20% 0 2.7
Mar 24% 0 4.2
Apr 24% 0 4
May 21% 0 4.7
Jun 27% 0 6.7
Jul 29% 0 7.5
Aug 19% 0 4.3
Sep 24% 0 6
Oct 20% 0 4.3
Nov 17% 0 2.8
Dec 16% 0 2.3

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 11 1 3.6
Feb 20 0 6.9
Mar 24 0 10.7
Apr 24 0 10.2
May 21 0 11.9
Jun 27 0 17
Jul 29 0 19.1
Aug 19 0 10.9
Sep 24 0 15.2
Oct 20 0 10.9
Nov 17 0 7.1
Dec 16 0 5.8


Humidity and Wind

Sasayama has some high humidity months, with other comfortably humid months. The least humid month is January (50.3% relative humidity), and the most humid month is July (69.7%).

Wind in Sasayama is usually moderate. The windiest month is December, followed by October and September. December’s average wind speed of around 7.9 knots (9.1 MPH or 14.7 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 15.1 knots, which is considered a moderate breeze.

Relative Humidity (%)

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

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 7.1 Gentle breeze 13.5 Significant breeze
Feb 7 Gentle breeze 13.6 Significant breeze
Mar 7.2 Gentle breeze 14.1 Significant breeze
Apr 7.2 Gentle breeze 14 Significant breeze
May 7 Gentle breeze 13.8 Significant breeze
Jun 7.1 Gentle breeze 13.3 Significant breeze
Jul 6.6 Light breeze 12.4 Significant breeze
Aug 6.9 Light breeze 12.6 Significant breeze
Sep 7.4 Gentle breeze 13.5 Significant breeze
Oct 7.5 Gentle breeze 13.6 Significant breeze
Nov 7 Gentle breeze 13.1 Significant breeze
Dec 7.9 Gentle breeze 14.5 Significant breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 50.3%
Feb 51.3%
Mar 50.7%
Apr 51%
May 54.8%
Jun 64.9%
Jul 69.7%
Aug 64.5%
Sep 59.2%
Oct 54.2%
Nov 52.9%
Dec 50.6%


Is it Safe to Travel to Sasayama?

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 Sasayama, Japan is May, followed by October and March. 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 Sasayama in July. 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 82.7 in July means 82.7% of the tourists vs. May.



Overall Sasayama Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel moderate. Highs range from 77.3°F (25.2°C) and 53.2°F (11.8°C) with warmer temperatures in the later months. Rain is somewhat common with roughly 7 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 quite warm. These months see the most precipitation with 6 to 9 days of precipitation per month. June – August is fairly slow season for tourism in Sasayama, so lodging and other accommodations may cost slightly less.

Fall (September through November)

Fall daily highs range from 86.3°F (30.2°C) and 59.3°F (15.2°C), which will feel very nice given the humidity and wind. It rains or snows a significant amount: 5 to 7 days per month. Tourism is the second busiest during these months due to the weather, so hotels may be slightly higher priced.

Winter (December through February)

Weather is too cold this time of year in Sasayama to be enjoyable for warm weather travelers. The average high during this season is between 55.2°F (12.9°C) and 48.2°F (9°C). On average, it rains or snows a fair amount: 3 to 6 times per month. These times of year are the slowest with tourists.


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