The best times to visit Ko Ngai for ideal weather are

January 8th to March 4th

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



Other Ko Ngai Travel Info

Weather in Ko Ngai


Average temperatures in Ko Ngai 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 6th 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 Ngai, the hottest months are May, April, and then June. See average monthly temperatures below. The warmest time of year is generally early to mid May where highs are regularly around 92.3°F (33.5°C) with temperatures rarely dropping below 77.9°F (25.5°C) at night.

Ko Ngai Temperatures (Fahrenheit)


Ko Ngai 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.

Ko Ngai Perceived Temperature (F)


Ko Ngai Perceived Temperature (C)



Average Ko Ngai 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 89.2 81.6 75.6
Feb 91 82.5 75.6
Mar 91.4 83.3 76.4
Apr 90.8 83.8 77.2
May 89.2 84 77.7
Jun 88.4 83.6 77.6
Jul 87.5 82.7 76.9
Aug 87.5 82.7 77.3
Sep 87.1 82.3 76.8
Oct 87.3 81.6 76.3
Nov 87.9 81.1 75.9
Dec 88.3 81.2 75.6

Show Celsius

Month Avg. High (°C) Avg. Mean (°C) Avg. Low (°C)
Jan 31.8 27.6 24.2
Feb 32.8 28.1 24.2
Mar 33 28.5 24.7
Apr 32.7 28.8 25.1
May 31.8 28.9 25.4
Jun 31.3 28.7 25.3
Jul 30.8 28.2 24.9
Aug 30.8 28.2 25.2
Sep 30.6 27.9 24.9
Oct 30.7 27.6 24.6
Nov 31.1 27.3 24.4
Dec 31.3 27.3 24.2



Precipitation (Rain or Snow)

If dry weather is what you’re after, the months with the lowest chance of significant precipitation in Ko Ngai are February, January, and then March. 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 to mid September with an average of 4 days of significant precipitation the week of September 10th.

When can you find snow in Ko Ngai? 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 Ngai.

Days with precipitation

Snow on the Ground

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

Snow depth

Average Rain and Snow by Month

Show Inches

Month Daily Chance of Rain Average Snow Depth (in) Total Precipitation (in)
Jan 7% 0 1.1
Feb 4% 0 0.8
Mar 19% 0 3.1
Apr 32% 0 5.8
May 38% 0 7.6
Jun 43% 0 12
Jul 47% 0 12.1
Aug 41% 0 14.8
Sep 48% 0 14.3
Oct 44% 0 10.6
Nov 33% 0 6.7
Dec 19% 0 2.6

Show Centimeters

Month Daily Chance of Rain Average Snow Depth (cm) Total Precipitation (cm)
Jan 7 0 2.8
Feb 4 0 2
Mar 19 0 7.9
Apr 32 0 14.7
May 38 0 19.3
Jun 43 0 30.5
Jul 47 0 30.7
Aug 41 0 37.6
Sep 48 0 36.3
Oct 44 0 26.9
Nov 33 0 17
Dec 19 0 6.6


Humidity and Wind

Ko Ngai has some very humid months, and above average humidity throughout the year. The least humid month is February (65% relative humidity), and the most humid month is October (79%).

Wind in Ko Ngai is usually calm. The windiest month is September, followed by August and July. September’s average wind speed of around 7.3 knots (8.5 MPH or 13.6 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 July where average top sustained speeds reach 14.8 knots, which is considered a moderate breeze.

Relative Humidity (%)

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

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 4.1 Light breeze 8 Gentle breeze
Feb 3.8 Barely noticeable 7.9 Gentle breeze
Mar 3.2 Barely noticeable 7.6 Gentle breeze
Apr 3.3 Barely noticeable 8 Gentle breeze
May 5.1 Light breeze 10.3 Gentle breeze
Jun 6.9 Light breeze 11.9 Significant breeze
Jul 6.9 Light breeze 12.2 Gentle breeze
Aug 7 Gentle breeze 12.3 Significant breeze
Sep 7.3 Gentle breeze 12.9 Gentle breeze
Oct 4.6 Light breeze 9.9 Gentle breeze
Nov 2.5 Barely noticeable 6.7 Gentle breeze
Dec 3.5 Barely noticeable 7.7 Gentle breeze

Show Relative Humidity by Month

Month Avg. Relative Humidity
Jan 67.8%
Feb 65%
Mar 69%
Apr 73.6%
May 76%
Jun 76.2%
Jul 77.1%
Aug 76.8%
Sep 78.5%
Oct 79%
Nov 78%
Dec 73.1%


Is it Safe to Travel to Ko Ngai?

Our best data indicates this area is somewhat safe, but with extra warnings in a few regions. As of Dec 04, 2023 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 Nov 27, 2023.


The Busiest and Least Crowded Months

The busiest month for tourism in Ko Ngai, 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 Ngai 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

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 somewhat extrapolated based on nearby areas. Displayed data is calculated relative to the peak, so a score of 72.3 in May means 72.3% of the tourists vs. January.



Overall Ko Ngai Travel Experience by Season

Spring (March through May)

Humidity and temperatures combine to make this season feel warm. Highs range from 92.3°F (33.5°C) and 88.7°F (31.5°C) with similar temperatures in the later months. Rain is somewhat common with 6 to 12 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 the most precipitation with 13 to 15 days of precipitation per month. June – August is the second busiest season for tourism in Ko Ngai, so lodging and other accommodations may cost slightly more.

Fall (September through November)

Fall daily highs range from 88.7°F (31.5°C) and 86.4°F (30.2°C), which will feel very nice given the humidity and wind. It rains or snows a good amount: 10 to 14 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 Ngai to be enjoyable for warm weather travelers. The average high during this season is between 91.4°F (33°C) and 87.6°F (30.9°C). On average, it rains or snows a smalll amount: 1 to 6 times per month. These times of year are the busiest with tourists.


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