The best times to visit Karatsu for ideal weather are
April 2nd to June 24th
September 24th to November 18th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Karatsu Travel Guide
Other Karatsu Travel Info
Weather in Karatsu
Average temperatures in Karatsu 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 chance of rain or snow throughout most of the year. The area is less temperate than some — in the 27th 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 Karatsu, 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 93.5°F (34.2°C) with temperatures rarely dropping below 77.5°F (25.3°C) at night.
Karatsu Temperatures (Fahrenheit)
Karatsu Temperatures (Celsius)
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.
Karatsu Perceived Temperature (F)
Karatsu Perceived Temperature (C)
Average Karatsu 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.
|Month||Avg. High (°F)||Avg. Mean (°F)||Avg. Low (°F)|
|Month||Avg. High (°C)||Avg. Mean (°C)||Avg. Low (°C)|
Precipitation (Rain or Snow)
If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Karatsu are January, October, 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 to mid January. For example, on the week of January 8th 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 4 days of significant precipitation the week of July 2nd.
When can you find snow in Karatsu? 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 Karatsu 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 Karatsu.
Snow on the Ground
The graph below shows the average snow on the ground in Karatsu (in).
Average Rain and Snow by Month
|Month||Daily Chance of Rain||Average Snow Depth (in)||Total Precipitation (in)|
|Month||Daily Chance of Rain||Average Snow Depth (cm)||Total Precipitation (cm)|
Humidity and Wind
Karatsu has some high humidity months, with other comfortably humid months. The least humid month is April (51.5% relative humidity), and the most humid month is July (68.2%).
Wind in Karatsu is usually calm. The windiest month is July, followed by March and April. July’s average wind speed of around 6.7 knots (7.7 MPH or 12.4 KPH) is considered “a light breeze.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early to mid July where average top sustained speeds reach 14.4 knots, which is considered a moderate breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Karatsu.
The graph below shows wind speed (max and average) in knots.
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||5.5||Light breeze||11.8||Significant breeze|
|Feb||6.2||Light breeze||12.8||Significant breeze|
|Mar||6.5||Light breeze||13.5||Significant breeze|
|Apr||6.4||Light breeze||13.5||Significant breeze|
|May||6||Light breeze||12.5||Significant breeze|
|Jun||6.3||Light breeze||12.8||Significant breeze|
|Jul||6.7||Light breeze||13.1||Significant breeze|
|Aug||6.3||Light breeze||12.9||Significant breeze|
|Sep||5.9||Light breeze||12.1||Significant breeze|
|Oct||6.3||Light breeze||12.5||Significant breeze|
|Nov||5.6||Light breeze||11.9||Significant breeze|
|Dec||5.7||Light breeze||12.1||Significant breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to Karatsu?
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 Karatsu, 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 Karatsu 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
Overall Karatsu Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel moderate. Highs range from 80.4°F (26.9°C) and 55.2°F (12.9°C) with warmer temperatures in the later months. Rain is somewhat common with 7 to 8 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 quite warm. These months see the most precipitation with 10 to 11 days of precipitation per month. June – August is the busiest season for tourism in Karatsu, so lodging and other accommodations may cost more than usual.
Fall (September through November)
Fall daily highs range from 87.4°F (30.8°C) and 59.5°F (15.3°C), which will feel very nice given the humidity and wind. It rains or snows a significant amount: 5 to 6 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 Karatsu to be enjoyable for warm weather travelers. The average high during this season is between 57.5°F (14.2°C) and 48.9°F (9.4°C). On average, it rains or snows a fair amount: 4 to 6 times per month. These times of year are the second busiest with tourists.