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Ko Samui

Thailand · Southeast Asia

Beach

Year-round range: 73°F to 81°F

Best months to visit:

January

Excellent conditions this month

Partly sunnyRain-proneWarm nightsHumidGreat for swimming
88
/100
Temperature
Comfortable
76°F
Precipitation
Some rain
10 days
Sunshine
Sunny
7h/day
Air comfort
Humid
🌧️Rainy season runs May–Jan (9 months).

Good beach conditions, with some cloud mixed in. Expect mostly pleasant days.

Your monthly fit score

Comfort fit by month.

Climate details▼

Temperature

Average highs and lows.

January is warm and sunny — good beach and outdoor weather.

Typical rangeAvg highAvg low

Shaded band = typical daily swing (P10 of night lows to P90 of afternoon peaks) — spans wider than avg high/low lines because it captures day-to-day variation.

| = Jan

Rainfall

Monthly rain and rain days.

January has moderate rainfall — occasional showers but mostly manageable.

in totalwet-day risk

Sunshine

Average hours of bright sun per day.

January has decent sunshine — a mix of sun and cloud.

Sun hoursCloud cover

Clear sky

CloudierClearer

Clear-sky share is the inverse of average cloud cover (100% minus cloud cover). Band labels follow standard meteorological categories; distribution within each band varies by day.

Air comfort by month

Warm, humid air is the norm here — typical for a tropical beach destination.

January has the expected warm, humid beach air — rain, cloud, and sea conditions matter more.

Comfortable airWarmHotWarm & humidVery humid

Time-of-day patterns

Typical hourly rhythm for January.

Temperature by hour

Morning
8 AM – 12 PM
75°F
Mid-day
12 PM – 3 PM
75°F
Warmest period
Afternoon
3 PM – 6 PM
75°F
Evening
6 PM – 10 PM
75°F
Best window
Rain chance
—
—
—
—
Cloud cover
60%
59%
57%
54%
Humidity
0%
0%
0%
0%
🌙 Overnight74°F

Temperature by hour and month

Typical temperature through the day across the year (1996-2025 normals, local time). Shaded cells are nighttime.

In January, afternoons reach about 75° and nights settle near 74°.

January 12 AM - 75° (Comfortable) - NighttimeJanuary 1 AM - 74° (Comfortable) - NighttimeJanuary 2 AM - 74° (Comfortable) - NighttimeJanuary 3 AM - 74° (Comfortable) - NighttimeJanuary 4 AM - 74° (Comfortable) - NighttimeJanuary 5 AM - 74° (Comfortable) - NighttimeJanuary 6 AM - 74° (Comfortable) - NighttimeJanuary 7 AM - 74° (Comfortable)January 8 AM - 74° (Comfortable)January 9 AM - 74° (Comfortable)January 10 AM - 75° (Comfortable)January 11 AM - 75° (Comfortable)January 12 PM - 75° (Comfortable)January 1 PM - 75° (Comfortable)January 2 PM - 75° (Comfortable)January 3 PM - 75° (Comfortable)January 4 PM - 75° (Comfortable)January 5 PM - 75° (Comfortable)January 6 PM - 75° (Comfortable)January 7 PM - 75° (Comfortable)January 8 PM - 75° (Comfortable) - NighttimeJanuary 9 PM - 75° (Comfortable) - NighttimeJanuary 10 PM - 75° (Comfortable) - NighttimeJanuary 11 PM - 75° (Comfortable) - NighttimeFebruary 12 AM - 75° (Warm) - NighttimeFebruary 1 AM - 75° (Warm) - NighttimeFebruary 2 AM - 75° (Comfortable) - NighttimeFebruary 3 AM - 75° (Comfortable) - NighttimeFebruary 4 AM - 75° (Comfortable) - NighttimeFebruary 5 AM - 75° (Comfortable) - NighttimeFebruary 6 AM - 75° (Comfortable) - NighttimeFebruary 7 AM - 75° (Comfortable)February 8 AM - 75° (Comfortable)February 9 AM - 75° (Comfortable)February 10 AM - 75° (Warm)February 11 AM - 75° (Warm)February 12 PM - 75° (Warm)February 1 PM - 76° (Warm)February 2 PM - 76° (Warm)February 3 PM - 76° (Warm)February 4 PM - 76° (Warm)February 5 PM - 76° (Warm)February 6 PM - 76° (Warm)February 7 PM - 76° (Warm)February 8 PM - 76° (Warm) - NighttimeFebruary 9 PM - 76° (Warm) - NighttimeFebruary 10 PM - 76° (Warm) - NighttimeFebruary 11 PM - 76° (Warm) - NighttimeMarch 12 AM - 77° (Warm) - NighttimeMarch 1 AM - 76° (Warm) - NighttimeMarch 2 AM - 76° (Warm) - NighttimeMarch 3 AM - 76° (Warm) - NighttimeMarch 4 AM - 76° (Warm) - NighttimeMarch 5 AM - 76° (Warm) - NighttimeMarch 6 AM - 76° (Warm) - NighttimeMarch 7 AM - 76° (Warm)March 8 AM - 76° (Warm)March 9 AM - 76° (Warm)March 10 AM - 76° (Warm)March 11 AM - 77° (Warm)March 12 PM - 77° (Warm)March 1 PM - 77° (Warm)March 2 PM - 77° (Warm)March 3 PM - 77° (Warm)March 4 PM - 77° (Warm)March 5 PM - 77° (Warm)March 6 PM - 77° (Warm)March 7 PM - 77° (Warm)March 8 PM - 77° (Warm) - NighttimeMarch 9 PM - 77° (Warm) - NighttimeMarch 10 PM - 77° (Warm) - NighttimeMarch 11 PM - 77° (Warm) - NighttimeApril 12 AM - 78° (Warm) - NighttimeApril 1 AM - 78° (Warm) - NighttimeApril 2 AM - 77° (Warm) - NighttimeApril 3 AM - 77° (Warm) - NighttimeApril 4 AM - 77° (Warm) - NighttimeApril 5 AM - 77° (Warm) - NighttimeApril 6 AM - 77° (Warm) - NighttimeApril 7 AM - 77° (Warm)April 8 AM - 77° (Warm)April 9 AM - 77° (Warm)April 10 AM - 78° (Warm)April 11 AM - 78° (Warm)April 12 PM - 78° (Warm)April 1 PM - 78° (Warm)April 2 PM - 78° (Warm)April 3 PM - 78° (Warm)April 4 PM - 78° (Warm)April 5 PM - 79° (Warm)April 6 PM - 79° (Warm)April 7 PM - 79° (Warm)April 8 PM - 78° (Warm) - NighttimeApril 9 PM - 78° (Warm) - NighttimeApril 10 PM - 78° (Warm) - NighttimeApril 11 PM - 78° (Warm) - NighttimeMay 12 AM - 78° (Warm) - NighttimeMay 1 AM - 78° (Warm) - NighttimeMay 2 AM - 77° (Warm) - NighttimeMay 3 AM - 77° (Warm) - NighttimeMay 4 AM - 77° (Warm) - NighttimeMay 5 AM - 77° (Warm) - NighttimeMay 6 AM - 77° (Warm) - NighttimeMay 7 AM - 77° (Warm)May 8 AM - 77° (Warm)May 9 AM - 78° (Warm)May 10 AM - 78° (Warm)May 11 AM - 78° (Warm)May 12 PM - 78° (Warm)May 1 PM - 79° (Warm)May 2 PM - 79° (Warm)May 3 PM - 79° (Warm)May 4 PM - 79° (Warm)May 5 PM - 79° (Warm)May 6 PM - 79° (Warm)May 7 PM - 79° (Warm)May 8 PM - 78° (Warm) - NighttimeMay 9 PM - 78° (Warm) - NighttimeMay 10 PM - 78° (Warm) - NighttimeMay 11 PM - 78° (Warm) - NighttimeJune 12 AM - 78° (Warm) - NighttimeJune 1 AM - 77° (Warm) - NighttimeJune 2 AM - 77° (Warm) - NighttimeJune 3 AM - 77° (Warm) - NighttimeJune 4 AM - 77° (Warm) - NighttimeJune 5 AM - 77° (Warm) - NighttimeJune 6 AM - 77° (Warm) - NighttimeJune 7 AM - 77° (Warm)June 8 AM - 77° (Warm)June 9 AM - 77° (Warm)June 10 AM - 77° (Warm)June 11 AM - 78° (Warm)June 12 PM - 78° (Warm)June 1 PM - 79° (Warm)June 2 PM - 79° (Warm)June 3 PM - 79° (Warm)June 4 PM - 79° (Warm)June 5 PM - 79° (Warm)June 6 PM - 78° (Warm)June 7 PM - 78° (Warm)June 8 PM - 78° (Warm) - NighttimeJune 9 PM - 78° (Warm) - NighttimeJune 10 PM - 78° (Warm) - NighttimeJune 11 PM - 78° (Warm) - NighttimeJuly 12 AM - 77° (Warm) - NighttimeJuly 1 AM - 77° (Warm) - NighttimeJuly 2 AM - 76° (Warm) - NighttimeJuly 3 AM - 76° (Warm) - NighttimeJuly 4 AM - 76° (Warm) - NighttimeJuly 5 AM - 76° (Warm) - NighttimeJuly 6 AM - 76° (Warm) - NighttimeJuly 7 AM - 76° (Warm)July 8 AM - 76° (Warm)July 9 AM - 76° (Warm)July 10 AM - 77° (Warm)July 11 AM - 77° (Warm)July 12 PM - 78° (Warm)July 1 PM - 78° (Warm)July 2 PM - 78° (Warm)July 3 PM - 78° (Warm)July 4 PM - 78° (Warm)July 5 PM - 78° (Warm)July 6 PM - 78° (Warm)July 7 PM - 78° (Warm)July 8 PM - 78° (Warm) - NighttimeJuly 9 PM - 78° (Warm) - NighttimeJuly 10 PM - 78° (Warm) - NighttimeJuly 11 PM - 77° (Warm) - NighttimeAugust 12 AM - 77° (Warm) - NighttimeAugust 1 AM - 76° (Warm) - NighttimeAugust 2 AM - 76° (Warm) - NighttimeAugust 3 AM - 76° (Warm) - NighttimeAugust 4 AM - 76° (Warm) - NighttimeAugust 5 AM - 76° (Warm) - NighttimeAugust 6 AM - 76° (Warm) - NighttimeAugust 7 AM - 76° (Warm)August 8 AM - 76° (Warm)August 9 AM - 76° (Warm)August 10 AM - 76° (Warm)August 11 AM - 77° (Warm)August 12 PM - 77° (Warm)August 1 PM - 78° (Warm)August 2 PM - 78° (Warm)August 3 PM - 78° (Warm)August 4 PM - 78° (Warm)August 5 PM - 78° (Warm)August 6 PM - 78° (Warm)August 7 PM - 78° (Warm)August 8 PM - 77° (Warm) - NighttimeAugust 9 PM - 77° (Warm) - NighttimeAugust 10 PM - 77° (Warm) - NighttimeAugust 11 PM - 77° (Warm) - NighttimeSeptember 12 AM - 76° (Warm) - NighttimeSeptember 1 AM - 76° (Warm) - NighttimeSeptember 2 AM - 76° (Warm) - NighttimeSeptember 3 AM - 75° (Warm) - NighttimeSeptember 4 AM - 75° (Warm) - NighttimeSeptember 5 AM - 75° (Warm) - NighttimeSeptember 6 AM - 75° (Warm) - NighttimeSeptember 7 AM - 75° (Warm)September 8 AM - 76° (Warm)September 9 AM - 76° (Warm)September 10 AM - 76° (Warm)September 11 AM - 76° (Warm)September 12 PM - 77° (Warm)September 1 PM - 77° (Warm)September 2 PM - 77° (Warm)September 3 PM - 77° (Warm)September 4 PM - 77° (Warm)September 5 PM - 77° (Warm)September 6 PM - 77° (Warm)September 7 PM - 77° (Warm)September 8 PM - 77° (Warm) - NighttimeSeptember 9 PM - 77° (Warm) - NighttimeSeptember 10 PM - 76° (Warm) - NighttimeSeptember 11 PM - 76° (Warm) - NighttimeOctober 12 AM - 75° (Warm) - NighttimeOctober 1 AM - 75° (Comfortable) - NighttimeOctober 2 AM - 75° (Comfortable) - NighttimeOctober 3 AM - 75° (Comfortable) - NighttimeOctober 4 AM - 74° (Comfortable) - NighttimeOctober 5 AM - 75° (Comfortable) - NighttimeOctober 6 AM - 75° (Comfortable) - NighttimeOctober 7 AM - 75° (Comfortable)October 8 AM - 75° (Comfortable)October 9 AM - 75° (Comfortable)October 10 AM - 75° (Warm)October 11 AM - 75° (Warm)October 12 PM - 76° (Warm)October 1 PM - 76° (Warm)October 2 PM - 76° (Warm)October 3 PM - 76° (Warm)October 4 PM - 76° (Warm)October 5 PM - 76° (Warm)October 6 PM - 76° (Warm)October 7 PM - 76° (Warm) - NighttimeOctober 8 PM - 76° (Warm) - NighttimeOctober 9 PM - 76° (Warm) - NighttimeOctober 10 PM - 76° (Warm) - NighttimeOctober 11 PM - 76° (Warm) - NighttimeNovember 12 AM - 75° (Warm) - NighttimeNovember 1 AM - 75° (Comfortable) - NighttimeNovember 2 AM - 75° (Comfortable) - NighttimeNovember 3 AM - 75° (Comfortable) - NighttimeNovember 4 AM - 74° (Comfortable) - NighttimeNovember 5 AM - 75° (Comfortable) - NighttimeNovember 6 AM - 75° (Comfortable) - NighttimeNovember 7 AM - 75° (Comfortable)November 8 AM - 75° (Comfortable)November 9 AM - 75° (Comfortable)November 10 AM - 75° (Warm)November 11 AM - 75° (Warm)November 12 PM - 75° (Warm)November 1 PM - 75° (Warm)November 2 PM - 75° (Warm)November 3 PM - 76° (Warm)November 4 PM - 76° (Warm)November 5 PM - 76° (Warm)November 6 PM - 76° (Warm)November 7 PM - 76° (Warm) - NighttimeNovember 8 PM - 76° (Warm) - NighttimeNovember 9 PM - 76° (Warm) - NighttimeNovember 10 PM - 76° (Warm) - NighttimeNovember 11 PM - 76° (Warm) - NighttimeDecember 12 AM - 75° (Comfortable) - NighttimeDecember 1 AM - 75° (Comfortable) - NighttimeDecember 2 AM - 75° (Comfortable) - NighttimeDecember 3 AM - 74° (Comfortable) - NighttimeDecember 4 AM - 74° (Comfortable) - NighttimeDecember 5 AM - 74° (Comfortable) - NighttimeDecember 6 AM - 74° (Comfortable) - NighttimeDecember 7 AM - 75° (Comfortable)December 8 AM - 75° (Comfortable)December 9 AM - 75° (Comfortable)December 10 AM - 75° (Comfortable)December 11 AM - 75° (Comfortable)December 12 PM - 75° (Comfortable)December 1 PM - 75° (Comfortable)December 2 PM - 75° (Comfortable)December 3 PM - 75° (Warm)December 4 PM - 75° (Warm)December 5 PM - 75° (Warm)December 6 PM - 75° (Warm)December 7 PM - 75° (Warm) - NighttimeDecember 8 PM - 75° (Warm) - NighttimeDecember 9 PM - 75° (Warm) - NighttimeDecember 10 PM - 75° (Warm) - NighttimeDecember 11 PM - 75° (Comfortable) - Nighttime12 AM6 AM12 PM6 PM11 PMJanFebMarAprMayJunJulAugSepOctNovDec
ComfortableWarmNighttime
▶Full month-by-month data
MonthHigh °FLow °FRain daysRain (in)Sun h/dayHumiditySea °F
Jan76°F73°F104.4in6.8h76%82°F
Feb77°F74°F60.9in7.9h76.42857142857142%83°F
Mar79°F75°F93.2in7.9h76.28571428571428%84°F
Apr80°F76°F112.6in6.9h77.28571428571428%86°F
May81°F76°F213.0in4.2h78.14285714285714%87°F
Jun81°F76°F205.8in3.3h76.14285714285714%86°F
Jul80°F75°F216.3in3.1h77.28571428571428%85°F
Aug80°F75°F183.5in3.1h77.14285714285714%85°F
Sep79°F75°F235.1in2.8h79%84°F
Oct78°F73°F283.3in3.4h81%84°F
Nov77°F73°F2119in4.4h81%84°F
Dec76°F73°F147.0in5.3h77%83°F

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Planning notes

Expect some rain.