The best times to visit Onjuku for ideal weather are
April 16th to July 8th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Onjuku Travel Guide
Other Onjuku Travel Info
Weather in Onjuku
Temperature
Average temperatures in Onjuku vary greatly. Considering humidity, temperatures feel nice most of the year, excluding some cold weeks in the winter, with a chance of rain or snow throughout most of the year. The area is less temperate than some — in the 33rd 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 Onjuku, 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 86°F (30°C) with temperatures rarely dropping below 75.4°F (24.1°C) at night.
Onjuku Temperatures (Fahrenheit)
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Onjuku Temperatures (Celsius)
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“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.
Onjuku Perceived Temperature (F)
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Onjuku Perceived Temperature (C)
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Average Onjuku 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 | 51.4 | 43.7 | 36 |
| Feb | 52.1 | 44.7 | 36.8 |
| Mar | 57 | 50.4 | 42 |
| Apr | 63 | 57.2 | 49.3 |
| May | 70.4 | 64.7 | 58.3 |
| Jun | 74.9 | 69.6 | 64.7 |
| Jul | 80.1 | 75.2 | 71 |
| Aug | 84.8 | 79 | 74.4 |
| Sep | 80.3 | 74.4 | 69 |
| Oct | 72.6 | 66.2 | 60 |
| Nov | 64.3 | 57.4 | 50.3 |
| Dec | 56.5 | 48.8 | 41 |
Show Celsius
| Month | Avg. High (°C) | Avg. Mean (°C) | Avg. Low (°C) |
|---|---|---|---|
| Jan | 10.8 | 6.5 | 2.2 |
| Feb | 11.2 | 7.1 | 2.7 |
| Mar | 13.9 | 10.2 | 5.6 |
| Apr | 17.2 | 14 | 9.6 |
| May | 21.3 | 18.2 | 14.6 |
| Jun | 23.8 | 20.9 | 18.2 |
| Jul | 26.7 | 24 | 21.7 |
| Aug | 29.3 | 26.1 | 23.6 |
| Sep | 26.8 | 23.6 | 20.6 |
| Oct | 22.6 | 19 | 15.6 |
| Nov | 17.9 | 14.1 | 10.2 |
| Dec | 13.6 | 9.3 | 5 |
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Onjuku are August, January, 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 3 days of significant precipitation the week of June 18th.
When can you find snow in Onjuku? 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 Onjuku.
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Snow on the Ground
The graph below shows the average snow on the ground in Onjuku (in).
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Average Rain and Snow by Month
Show Inches
| Month | Daily Chance of Rain | Average Snow Depth (in) | Total Precipitation (in) |
|---|---|---|---|
| Jan | 14% | 0 | 3.4 |
| Feb | 26% | 0 | 6 |
| Mar | 32% | 0 | 6.6 |
| Apr | 33% | 0 | 6.9 |
| May | 29% | 0 | 7.3 |
| Jun | 34% | 0 | 9.8 |
| Jul | 24% | 0 | 6.4 |
| Aug | 14% | 0 | 3.5 |
| Sep | 28% | 0 | 9.8 |
| Oct | 33% | 0 | 12.1 |
| Nov | 27% | 0 | 6.3 |
| Dec | 20% | 0 | 4.4 |
Show Centimeters
| Month | Daily Chance of Rain | Average Snow Depth (cm) | Total Precipitation (cm) |
|---|---|---|---|
| Jan | 14 | 0 | 8.6 |
| Feb | 26 | 0 | 15.2 |
| Mar | 32 | 0 | 16.8 |
| Apr | 33 | 0 | 17.5 |
| May | 29 | 0 | 18.5 |
| Jun | 34 | 0 | 24.9 |
| Jul | 24 | 0 | 16.3 |
| Aug | 14 | 0 | 8.9 |
| Sep | 28 | 0 | 24.9 |
| Oct | 33 | 0 | 30.7 |
| Nov | 27 | 0 | 16 |
| Dec | 20 | 0 | 11.2 |
Humidity and Wind
Onjuku has some extremely humid months, with other moderately humid months on the other side of the year. The least humid month is January (47.2% relative humidity), and the most humid month is July (85.2%).
Wind in Onjuku is usually calm. The windiest month is March, followed by April and February. March’s average wind speed of around 7.5 knots (8.6 MPH or 13.8 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 to mid March where average top sustained speeds reach 15.5 knots, which is considered a moderate breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Onjuku.
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Wind
The graph below shows wind speed (max and average) in knots.
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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 | 6.8 | Light breeze | 12.5 | Significant breeze |
| Feb | 7.3 | Gentle breeze | 13.3 | Significant breeze |
| Mar | 7.5 | Gentle breeze | 14.4 | Significant breeze |
| Apr | 7.4 | Gentle breeze | 13.6 | Significant breeze |
| May | 6.8 | Light breeze | 12.6 | Significant breeze |
| Jun | 5.6 | Light breeze | 10.7 | Gentle breeze |
| Jul | 5.5 | Light breeze | 10.6 | Significant breeze |
| Aug | 5.8 | Light breeze | 10.1 | Gentle breeze |
| Sep | 6.2 | Light breeze | 11.3 | Significant breeze |
| Oct | 6.4 | Light breeze | 11.7 | Significant breeze |
| Nov | 6.5 | Light breeze | 12.2 | Significant breeze |
| Dec | 7 | Gentle breeze | 13.1 | Significant breeze |
Show Relative Humidity by Month
| Month | Avg. Relative Humidity |
|---|---|
| Jan | 47.2% |
| Feb | 55.1% |
| Mar | 58.6% |
| Apr | 66.2% |
| May | 73.3% |
| Jun | 81.6% |
| Jul | 85.2% |
| Aug | 82.3% |
| Sep | 77.7% |
| Oct | 71.7% |
| Nov | 65.1% |
| Dec | 54.9% |
Is it Safe to Travel to Onjuku?
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 Onjuku, 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 Onjuku 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
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Overall Onjuku Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderate. Highs range from 72.2°F (22.3°C) and 53.4°F (11.9°C) with warmer temperatures in the later months. Rain is somewhat common with 9 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 very comfortable weather with high temperatures that are comfortable. These months see moderate precipitation with 4 to 10 days of precipitation per month. June – August is fairly slow season for tourism in Onjuku, so lodging and other accommodations may cost slightly less.
Fall (September through November)
Fall daily highs range from 83.1°F (28.4°C) and 61.1°F (16.2°C), which will feel very nice given the humidity and wind. It rains or snows a significant amount: 8 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 too cold this time of year in Onjuku to be enjoyable for warm weather travelers. The average high during this season is between 59°F (15°C) and 50.3°F (10.2°C). On average, it rains or snows a fair amount: 4 to 7 times per month. These times of year are the second busiest with tourists.
Best Times to Travel› Japan › Onjuku, Japan