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Ko Samui Climate Guide
Thailand
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Maximum Daytime Temperature (°C)
Minimum Night-time Temperature (°C)
29
29 °C (84°F) Maximum Daytime Temperature in January
29
29 °C (84°F) Maximum Daytime Temperature in February
30
30 °C (86°F) Maximum Daytime Temperature in March
32
32 °C (90°F) Maximum Daytime Temperature in April
32
32 °C (90°F) Maximum Daytime Temperature in May
31
31 °C (88°F) Maximum Daytime Temperature in June
31
31 °C (88°F) Maximum Daytime Temperature in July
31
31 °C (88°F) Maximum Daytime Temperature in August
31
31 °C (88°F) Maximum Daytime Temperature in September
30
30 °C (86°F) Maximum Daytime Temperature in October
29
29 °C (84°F) Maximum Daytime Temperature in November
29
29 °C (84°F) Maximum Daytime Temperature in December
J F M A M J J A S O N D
22
22 °C (72°F) Minimum Night-time Temperature in January
23
23 °C (73°F) Minimum Night-time Temperature in February
24
24 °C (75°F) Minimum Night-time Temperature in March
25
25 °C (77°F) Minimum Night-time Temperature in April
25
25 °C (77°F) Minimum Night-time Temperature in May
24
24 °C (75°F) Minimum Night-time Temperature in June
24
24 °C (75°F) Minimum Night-time Temperature in July
24
24 °C (75°F) Minimum Night-time Temperature in August
24
24 °C (75°F) Minimum Night-time Temperature in September
23
23 °C (73°F) Minimum Night-time Temperature in October
23
23 °C (73°F) Minimum Night-time Temperature in November
22
22 °C (72°F) Minimum Night-time Temperature in December
J F M A M J J A S O N D
Hours of Sunshine
Hours of Daylight
7
7 Hours of Sunshine (61% of Daylight Hours) in January
8
8 Hours of Sunshine (69% of Daylight Hours) in February
8
8 Hours of Sunshine (68% of Daylight Hours) in March
8
8 Hours of Sunshine (64% of Daylight Hours) in April
6
6 Hours of Sunshine (51% of Daylight Hours) in May
6
6 Hours of Sunshine (45% of Daylight Hours) in June
6
6 Hours of Sunshine (46% of Daylight Hours) in July
6
6 Hours of Sunshine (44% of Daylight Hours) in August
6
6 Hours of Sunshine (46% of Daylight Hours) in September
6
6 Hours of Sunshine (49% of Daylight Hours) in October
6
6 Hours of Sunshine (50% of Daylight Hours) in November
7
7 Hours of Sunshine (56% of Daylight Hours) in December
J F M A M J J A S O N D
12
12 Hours of Daylight in January
12
12 Hours of Daylight in February
12
12 Hours of Daylight in March
12
12 Hours of Daylight in April
13
13 Hours of Daylight in May
13
13 Hours of Daylight in June
13
13 Hours of Daylight in July
12
12 Hours of Daylight in August
12
12 Hours of Daylight in September
12
12 Hours of Daylight in October
12
12 Hours of Daylight in November
12
12 Hours of Daylight in December
J F M A M J J A S O N D
Days with some Rain
Monthly Rainfall (mm)
9
9 Days with some Rain in January
4
4 Days with some Rain in February
4
4 Days with some Rain in March
8
8 Days with some Rain in April
17
17 Days with some Rain in May
16
16 Days with some Rain in June
16
16 Days with some Rain in July
16
16 Days with some Rain in August
18
18 Days with some Rain in September
20
20 Days with some Rain in October
20
20 Days with some Rain in November
15
15 Days with some Rain in December
J F M A M J J A S O N D
123
123 mm (4.8 inches) Monthly Rainfall in January
39
39 mm (1.5 inches) Monthly Rainfall in February
54
54 mm (2.1 inches) Monthly Rainfall in March
85
85 mm (3.3 inches) Monthly Rainfall in April
172
172 mm (6.8 inches) Monthly Rainfall in May
118
118 mm (4.6 inches) Monthly Rainfall in June
146
146 mm (5.7 inches) Monthly Rainfall in July
137
137 mm (5.4 inches) Monthly Rainfall in August
141
141 mm (5.6 inches) Monthly Rainfall in September
275
275 mm (10.8 inches) Monthly Rainfall in October
463
463 mm (18.2 inches) Monthly Rainfall in November
188
188 mm (7.4 inches) Monthly Rainfall in December
J F M A M J J A S O N D
Heat & Humidity / Chance of Frost
UV Index (Maximum)
M
Moderate Heat & Humidity in January
H
High Heat & Humidity in February
H
High Heat & Humidity in March
VH
Very High Heat & Humidity in April
VH
Very High Heat & Humidity in May
VH
Very High Heat & Humidity in June
H
High Heat & Humidity in July
H
High Heat & Humidity in August
H
High Heat & Humidity in September
H
High Heat & Humidity in October
H
High Heat & Humidity in November
M
Moderate Heat & Humidity in December
J F M A M J J A S O N D
11
UV 11 (Extreme) in January
11
UV 11+ (Extreme) in February
11
UV 11+ (Extreme) in March
11
UV 11+ (Extreme) in April
11
UV 11+ (Extreme) in May
11
UV 11+ (Extreme) in June
11
UV 11+ (Extreme) in July
11
UV 11+ (Extreme) in August
11
UV 11+ (Extreme) in September
11
UV 11+ (Extreme) in October
11
UV 11 (Extreme) in November
10
UV 10 (Very High) in December
J F M A M J J A S O N D
Sea Temperature (°C)
28
28 °C (82°F) Sea Temperature in January
28
28 °C (82°F) Sea Temperature in February
29
29 °C (84°F) Sea Temperature in March
30
30 °C (86°F) Sea Temperature in April
30
30 °C (86°F) Sea Temperature in May
30
30 °C (86°F) Sea Temperature in June
29
29 °C (84°F) Sea Temperature in July
29
29 °C (84°F) Sea Temperature in August
29
29 °C (84°F) Sea Temperature in September
29
29 °C (84°F) Sea Temperature in October
29
29 °C (84°F) Sea Temperature in November
28
28 °C (82°F) Sea Temperature in December
J F M A M J J A S O N D
Ko Samui Climate Guide (Historical Weather Averages), Thailand
Elev: 100 m   Long: 100°04'E   Lat: 09°33'N
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