The best times to visit Ko Racha Yai for ideal weather are
December 17th to February 25th
based on average temperature and humidity from NOAA (the National Oceanic and Atmospheric Administration). Read below for more weather and travel details.
Ko Racha Yai Travel Guide
Other Ko Racha Yai Travel Info
Weather in Ko Racha Yai
Average temperatures in Ko Racha Yai vary barely at all. Considering humidity, temperatures feel hot all year with a chance of rain throughout most of the year. The area is far less temperate than some — in the 8th 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 Ko Racha Yai, the hottest months are April, March, and then May. See average monthly temperatures below. The warmest time of year is generally early to mid March where highs are regularly around 93.9°F (34.4°C) with temperatures rarely dropping below 78.7°F (25.9°C) at night.
Ko Racha Yai Temperatures (Fahrenheit)
Ko Racha Yai 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.
Ko Racha Yai Perceived Temperature (F)
Ko Racha Yai Perceived Temperature (C)
Average Ko Racha Yai 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 Ko Racha Yai are February, 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 February. For example, on the week of February 5th there are no days of precipitation on average. By contrast, it’s most likely to rain or snow in late September with an average of 5 days of significant precipitation the week of September 24th.
When can you find snow in Ko Racha Yai? 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 Ko Racha Yai.
Snow on the Ground
The graph below shows the average snow on the ground in Ko Racha Yai (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
Ko Racha Yai has some very humid months, and above average humidity throughout the year. The least humid month is February (61.6% relative humidity), and the most humid month is October (76.6%).
Wind in Ko Racha Yai is usually extremely calm. The windiest month is July, followed by September and June. July’s average wind speed of around 2.5 knots (2.9 MPH or 4.7 KPH) is considered “light air.” Maximum sustained winds (the highest speed for the day lasting more than a few moments) are at their highest in early August where average top sustained speeds reach 7 knots, which is considered a gentle breeze.
Relative Humidity (%)
The graph below shows the average % humidity by month in Ko Racha Yai.
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||2.4||Barely noticeable||5.7||Light breeze|
|Feb||2.2||Barely noticeable||5.7||Light breeze|
|Mar||2||Barely noticeable||5.7||Light breeze|
|Apr||1.7||Barely noticeable||5.6||Light breeze|
|May||1.9||Barely noticeable||5.9||Light breeze|
|Jun||2.5||Barely noticeable||6.5||Light breeze|
|Jul||2.5||Barely noticeable||6.4||Light breeze|
|Aug||2.4||Barely noticeable||6.3||Light breeze|
|Sep||2.5||Barely noticeable||6.4||Light breeze|
|Oct||1.9||Barely noticeable||5.9||Light breeze|
|Nov||1.8||Barely noticeable||5.3||Light breeze|
|Dec||2.4||Barely noticeable||5.6||Light breeze|
Show Relative Humidity by Month
|Month||Avg. Relative Humidity|
Is it Safe to Travel to Ko Racha Yai?
Our best data indicates this area is somewhat safe, but with extra warnings in a few regions. As of Oct 07, 2019 there are travel warnings and regional advisories for Thailand; exercise a high degree of caution 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 Aug 22, 2019.
The Busiest and Least Crowded Months
The busiest month for tourism in Ko Racha Yai, Thailand is January, followed by August 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 Ko Racha Yai in May. 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 Ko Racha Yai Travel Experience by Season
Spring (March through May)
Humidity and temperatures combine to make this season feel warm. Highs range from 93.9°F (34.4°C) and 91.3°F (32.9°C) with similar temperatures in the later months. Rain is very common with 7 to 15 days of significant precipitation per month. Spring is the slowest 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 moderate precipitation with 13 to 15 days of precipitation per month. June – August is the second busiest season for tourism in Ko Racha Yai, so lodging and other accommodations may cost slightly more.
Fall (September through November)
Fall daily highs range from 90.7°F (32.6°C) and 88.6°F (31.4°C), which will feel very nice given the humidity and wind. It rains or snows a great amount: 12 to 17 days per month. Tourism is fairly slow during these months due to the weather, so hotels may be lower priced.
Winter (December through February)
Weather is perfect this time of year in Ko Racha Yai to be enjoyable for warm weather travelers. The average high during this season is between 93°F (33.9°C) and 89.3°F (31.8°C). On average, it rains or snows a fair amount: 2 to 6 times per month. These times of year are the busiest with tourists.