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Climate table for Koh Samui, Surat Thani province- Southern Thailand - Gulf of Thailand. Information provided by Thailand Meterological Department.
Month | Jan |
Feb |
Mar |
Apr |
May |
Jun |
Jul |
Aug |
Sep |
Oct |
Nov |
Dec |
All |
Mean temperature (oC) | |||||||||||||
Daily | 26.6 | 27.3 | 28.2 | 29.1 | 29.0 | 28.5 | 28.2 | 28.1 | 27.7 | 27.1 | 26.6 | 26.4 | 27.7 |
Morning Mininum | 24.1 | 25.0 | 25.7 | 26.1 | 25.8 | 25.5 | 25.1 | 25.1 | 24.8 | 24.4 | 24.1 | 23.8 | 25.0 |
Extreme Min | 18.6 | 19.5 | 21.0 | 22.0 | 22.9 | 21.5 | 19.9 | 21.6 | 21.5 | 21.1 | 20.3 | 18.8 | 18.6 |
Afternoon Maximun | 28.9 | 29.5 | 30.7 | 32.1 | 32.6 | 32.2 | 32.0 | 31.8 | 31.5 | 30.5 | 29.5 | 29.0 | 30.9 |
Extreme Max | 32.6 | 34.1 | 35.5 | 36.5 | 36.3 | 35.8 | 36.0 | 35.5 | 35.4 | 34.1 | 34.0 | 32.0 | 36.5 |
Mean relative humidity(%) | |||||||||||||
at 0700 am. | 87 | 87 | 87 | 87 | 87 | 84 | 84 | 84 | 87 | 91 | 91 | 87 | 87 |
at 0100 pm. |
77 | 77 | 76 | 74 | 70 | 68 | 66 | 67 | 69 | 76 | 79 | 75 | 73 |
Surface wind |
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Mean Speed (km./hr.) |
10.4 | 11.3 | 10.2 | 6.9 | 7.0 | 9.1 | 9.1 | 9.6 | 8.0 | 5.7 | 6.9 | 9.1 | 8.6 |
Direction |
east |
southeast | east | east | west | west | west | west | west | west | east | east | west |
Mean rainfall |
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Amount (mm./month) |
130.6 | 56.2 | 65.6 | 75.0 | 143.6 | 108.7 | 123.2 | 121.4 | 117.0 | 303.5 | 490.4 | 210.7 | 1945.9 |
Rainy Day (day/month) |
10.7 | 5.6 | 4.9 | 7.9 | 14.6 | 14.3 | 14.3 | 15.2 | 16.0 | 19.6 | 19.5 | 14.0 | 156.6 |
Heavy Rainy Day (day/month) Greater Than 35 mm./day |
0.5 | 0.4 | 0.6 | 0.4 | 1.1 | 0.6 | 0.7 | 0.7 | 0.5 | 2.5 | 3.6 | 1.8 | 13.0 |
Visibility (km.) |
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Time 07.00 |
6.1 | 6.4 | 6.4 | 7.5 | 9.8 | 10.0 | 9.6 | 9.8 | 10.6 | 8.9 | 6.9 | 6.0 | 8.2 |
Daily |
6.5 | 6.8 | 6.9 | 7.9 | 10.0 | 9.9 | 9.7 | 9.9 | 10.5 | 8.7 | 7.1 | 6.3 | 8.4 |
Mean sunshine duration |
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Daily |
- | - | - | - | - | - | - | - | - | - | - | - | - |