Compare the Climate and Weather in Ko Samui, Koh Samui Airport, Surat Thani Airport, and Chumphon Airport

This page lets you compare and contrast the weather and climate in Ko Samui, Koh Samui Airport, Surat Thani Airport, and Chumphon Airport year round.

You can drill down to a specific season, month, and even day by clicking the graphs or using the navigation panel.

You can compare up to 6 locations. Add more locations using the search box below or by clicking the map.

Average High and Low Temperature

Compare the Average High and Low Temperature in Ko Samui, Koh Samui Airport, Surat Thani Airport, and Chumphon AirportJanFebMarAprMayJunJulAugSepOctNovDec70°F70°F75°F75°F80°F80°F85°F85°F90°F90°F95°F95°F100°F100°F105°F105°F81789185767193847771898010592938010591NowNowSurat Thani AirportSurat Thani AirportKoh Samui AirportKoh Samui AirportKo SamuiKo SamuiChumphon AirportChumphon Airport
The daily average high and low air temperature at 2 meters above the ground. The thin dotted lines are the corresponding perceived temperatures.
HighJanFebMarAprMayJunJulAugSepOctNovDec
Ko Samui 85°F87°F89°F90°F91°F90°F89°F89°F88°F87°F86°F85°F
Koh Samui Airport 85°F87°F89°F90°F91°F90°F90°F90°F89°F87°F86°F85°F
Surat Thani Airport 86°F89°F92°F93°F91°F90°F89°F89°F88°F87°F85°F84°F
Chumphon Airport 86°F88°F91°F92°F90°F89°F88°F87°F87°F87°F86°F85°F
LowJanFebMarAprMayJunJulAugSepOctNovDec
Ko Samui 78°F79°F80°F81°F81°F81°F80°F80°F80°F79°F78°F78°F
Koh Samui Airport 78°F79°F80°F81°F82°F82°F81°F81°F80°F79°F79°F78°F
Surat Thani Airport 71°F71°F73°F75°F76°F76°F75°F75°F75°F75°F74°F73°F
Chumphon Airport 71°F73°F74°F77°F77°F77°F76°F76°F76°F75°F74°F71°F

Ko Samui

Average Hourly Temperature in Ko SamuiJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowwarmhot

Koh Samui Airport

Average Hourly Temperature in Koh Samui AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowwarmhot

Surat Thani Airport

Average Hourly Temperature in Surat Thani AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowcomfortablewarmhotcomfortable

Chumphon Airport

Average Hourly Temperature in Chumphon AirportJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowcomfortablewarmhotcomfortable
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Chance of Clearer Skies

Compare the Chance of Clearer Skies in Ko Samui, Koh Samui Airport, Surat Thani Airport, and Chumphon AirportJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%4766NowNowSurat Thani AirportSurat Thani AirportKo SamuiKo SamuiChumphon AirportChumphon Airport
The percentage of time the sky is clear, mostly clear, or partly cloudy (i.e., less than 60% of the sky is covered by clouds).
Clearer SkiesJanFebMarAprMayJunJulAugSepOctNovDec
Ko Samui 43%45%32%16%7%7%7%7%9%13%22%38%
Koh Samui Airport 44%45%33%16%7%7%7%7%9%13%23%38%
Surat Thani Airport 42%42%30%15%8%7%7%6%9%12%20%35%
Chumphon Airport 47%46%33%17%8%6%7%7%9%14%25%42%

Daily Chance of Precipitation

Compare the Daily Chance of Precipitation in Ko Samui, Koh Samui Airport, Surat Thani Airport, and Chumphon AirportJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%64968NowNowSurat Thani AirportSurat Thani AirportKoh Samui AirportKoh Samui AirportKo SamuiKo SamuiChumphon AirportChumphon Airport
The percentage of days in which precipitation is observed, excluding trace quantities.
Days of Precip.JanFebMarAprMayJunJulAugSepOctNovDec
Ko Samui 6.1d3.2d4.5d7.6d15.4d15.1d15.7d15.5d17.3d19.1d17.3d11.4d
Koh Samui Airport 6.2d3.2d4.6d7.7d16.0d15.3d15.8d15.6d17.3d19.5d17.8d11.6d
Surat Thani Airport 5.0d3.2d6.1d10.3d17.8d17.4d17.9d17.6d19.8d20.8d16.9d10.1d
Chumphon Airport 3.9d3.1d5.1d7.5d16.4d18.1d18.9d18.6d19.2d19.2d13.7d6.3d

Average Monthly Rainfall

Compare the Average Monthly Rainfall in Ko Samui, Koh Samui Airport, Surat Thani Airport, and Chumphon AirportJanFebMarAprMayJunJulAugSepOctNovDec0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 in12 in12 in14 in14 in12.51.311.29.21.1NowNowSurat Thani AirportSurat Thani AirportKoh Samui AirportKoh Samui AirportKo SamuiKo SamuiChumphon AirportChumphon Airport
The average rainfall accumulated over the course of a sliding 31-day period centered on the day in question.
RainfallJanFebMarAprMayJunJulAugSepOctNovDec
Ko Samui 2.3″1.4″2.3″3.0″5.3″5.2″5.0″5.0″6.2″9.3″12.3″6.6″
Koh Samui Airport 2.3″1.4″2.3″2.9″5.0″4.9″4.7″4.6″5.8″9.1″12.4″6.6″
Surat Thani Airport 1.7″1.0″2.3″4.1″8.0″8.5″8.6″9.2″11.2″10.8″9.8″4.9″
Chumphon Airport 1.2″1.1″2.2″3.2″6.6″7.9″8.4″8.1″8.5″8.8″8.0″2.8″

Hours of Daylight

Compare the Hours of Daylight in Ko Samui, Koh Samui Airport, Surat Thani Airport, and Chumphon AirportJanFebMarAprMayJunJulAugSepOctNovDec4 hr4 hr6 hr6 hr8 hr8 hr10 hr10 hr12 hr12 hr14 hr14 hr16 hr16 hr18 hr18 hr20 hr20 hr12.711.6NowNowSurat Thani AirportSurat Thani AirportKoh Samui AirportKoh Samui AirportKo SamuiKo SamuiChumphon AirportChumphon Airport
The number of hours during which the Sun is at least partly above the horizon.
DaylightJanFebMarAprMayJunJulAugSepOctNovDec
Ko Samui 11.6h11.8h12.1h12.3h12.6h12.7h12.6h12.4h12.2h11.9h11.7h11.6h
Koh Samui Airport 11.6h11.8h12.1h12.3h12.6h12.7h12.6h12.4h12.2h11.9h11.7h11.6h
Surat Thani Airport 11.7h11.8h12.1h12.3h12.5h12.6h12.6h12.4h12.2h11.9h11.7h11.6h
Chumphon Airport 11.6h11.8h12.1h12.4h12.6h12.7h12.7h12.5h12.2h11.9h11.6h11.5h

Chance of Muggy Conditions

Compare the Chance of Muggy Conditions in Ko Samui, Koh Samui Airport, Surat Thani Airport, and Chumphon AirportJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%10010010010090NowNowSurat Thani AirportSurat Thani AirportKoh Samui AirportKoh Samui AirportKo SamuiKo SamuiChumphon AirportChumphon Airport
The percentage of time that is muggy, oppressive, or miserable (i.e., a dew point greater than 65°F).
Muggy daysJanFebMarAprMayJunJulAugSepOctNovDec
Ko Samui 30.9d28.9d31.0d30.0d31.0d30.0d31.0d31.0d30.0d31.0d30.0d31.0d
Koh Samui Airport 30.9d28.9d31.0d30.0d31.0d30.0d31.0d31.0d30.0d31.0d30.0d31.0d
Surat Thani Airport 30.5d28.5d30.7d29.9d31.0d30.0d31.0d31.0d30.0d31.0d30.0d30.8d
Chumphon Airport 29.0d28.4d30.8d30.0d31.0d30.0d31.0d31.0d30.0d31.0d29.4d28.3d

Average Wind Speed

Compare the Average Wind Speed in Ko Samui, Koh Samui Airport, Surat Thani Airport, and Chumphon AirportJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph12.37.16.33.810.76.1NowNowSurat Thani AirportSurat Thani AirportKoh Samui AirportKoh Samui AirportKo SamuiKo SamuiChumphon AirportChumphon Airport
The average of mean hourly wind speeds at 10 meters above the ground.
Wind Speed (mph)JanFebMarAprMayJunJulAugSepOctNovDec
Ko Samui 10.39.38.37.38.310.511.111.410.08.911.012.0
Koh Samui Airport 10.49.48.57.48.510.811.411.810.39.111.112.1
Surat Thani Airport 5.65.04.43.94.35.25.45.54.94.55.56.2
Chumphon Airport 7.97.06.66.27.79.810.310.58.97.38.89.4

Average Water Temperature

Compare the Average Water Temperature in Ko Samui, Koh Samui Airport, Surat Thani Airport, and Chumphon AirportJanFebMarAprMayJunJulAugSepOctNovDec81°F81°F82°F82°F83°F83°F84°F84°F85°F85°F86°F86°F87°F87°F8782828681NowNowSurat Thani AirportSurat Thani AirportKoh Samui AirportKoh Samui AirportKo SamuiKo SamuiChumphon AirportChumphon Airport
The daily average wide-area surface water temperature.
Water Temp.JanFebMarAprMayJunJulAugSepOctNovDec
Ko Samui 82°F83°F84°F86°F86°F86°F85°F85°F85°F84°F83°F82°F
Koh Samui Airport 82°F83°F84°F86°F86°F86°F85°F85°F85°F84°F83°F82°F
Surat Thani Airport 82°F83°F85°F86°F86°F85°F85°F84°F84°F84°F83°F82°F
Chumphon Airport 82°F83°F84°F86°F86°F85°F84°F84°F84°F84°F83°F82°F

Tourism Score

Compare the Tourism Score in Ko Samui, Koh Samui Airport, Surat Thani Airport, and Chumphon AirportJanFebMarAprMayJunJulAugSepOctNovDec002244668810104.91.65.93.26.3NowNowSurat Thani AirportSurat Thani AirportKoh Samui AirportKoh Samui AirportChumphon AirportChumphon Airport
The tourism score, which favors clear, rainless days with perceived temperatures between 65°F and 80°F.

Beach/Pool Score

Compare the Beach/Pool Score in Ko Samui, Koh Samui Airport, Surat Thani Airport, and Chumphon AirportJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.93.34.0NowNowSurat Thani AirportSurat Thani AirportKoh Samui AirportKoh Samui AirportKo SamuiKo SamuiChumphon AirportChumphon Airport
The beach/pool score, which favors clear, rainless days with perceived temperatures between 75°F and 90°F.

Growing Season

Compare the Growing Season in Ko Samui, Koh Samui Airport, Surat Thani Airport, and Chumphon AirportJanFebMarAprMayJunJulAugSepOctNovDec0%0%20%20%40%40%60%60%80%80%100%100%NowNowSurat Thani AirportSurat Thani AirportKoh Samui AirportKoh Samui AirportKo SamuiKo SamuiChumphon AirportChumphon Airport
The percentage chance that a given day is within the growing season, defined as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

Growing Degree Days

Compare the Growing Degree Days in Ko Samui, Koh Samui Airport, Surat Thani Airport, and Chumphon AirportJanFebMarAprMayJunJulAugSepOctNovDec2,000°F2,000°F4,000°F4,000°F6,000°F6,000°F8,000°F8,000°F10,000°F10,000°F12,000°F12,000°FNowNowSurat Thani AirportSurat Thani AirportKoh Samui AirportKoh Samui AirportKo SamuiKo Samui
The average growing degree days accumulated over the course of the year, where growing degree days are defined as the integral of warmth above a base temperature (50°F in this case).

Average Daily Incident Shortwave Solar Energy

Compare the Average Daily Incident Shortwave Solar Energy in Ko Samui, Koh Samui Airport, Surat Thani Airport, and Chumphon AirportJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh6.53.74.0NowNowSurat Thani AirportSurat Thani AirportKoh Samui AirportKoh Samui AirportKo SamuiKo SamuiChumphon AirportChumphon Airport
The average daily shortwave solar energy reaching the ground per square meter.
Solar Energy (kWh)JanFebMarAprMayJunJulAugSepOctNovDec
Ko Samui 5.86.36.25.34.13.83.83.93.94.04.35.1
Koh Samui Airport 5.86.36.25.34.13.83.83.93.94.04.35.1
Surat Thani Airport 5.86.46.35.64.44.04.04.14.24.24.45.0
Chumphon Airport 5.86.26.25.44.23.83.84.04.04.04.55.2

This report illustrates the typical weather for Ko Samui, Koh Samui Airport, Surat Thani Airport, and Chumphon Airport year round, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

The details of the data sources used on this page vary between places and are discussed in detail on each place's dedicated page:

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

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