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Castries Climate Guide
Saint Lucia
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Maximum Daytime Temperature (°C)
Minimum Night-time Temperature (°C)
28
28 °C (82°F) Maximum Daytime Temperature in January
28
28 °C (82°F) Maximum Daytime Temperature in February
28
28 °C (82°F) Maximum Daytime Temperature in March
29
29 °C (84°F) Maximum Daytime Temperature in April
30
30 °C (86°F) Maximum Daytime Temperature in May
30
30 °C (86°F) Maximum Daytime Temperature in June
30
30 °C (86°F) Maximum Daytime Temperature in July
30
30 °C (86°F) Maximum Daytime Temperature in August
30
30 °C (86°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
28
28 °C (82°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
22
22 °C (72°F) Minimum Night-time Temperature in February
22
22 °C (72°F) Minimum Night-time Temperature in March
23
23 °C (73°F) Minimum Night-time Temperature in April
24
24 °C (75°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
8
8 Hours of Sunshine (72% of Daylight Hours) in January
8
8 Hours of Sunshine (71% of Daylight Hours) in February
8
8 Hours of Sunshine (69% of Daylight Hours) in March
8
8 Hours of Sunshine (67% of Daylight Hours) in April
8
8 Hours of Sunshine (64% of Daylight Hours) in May
8
8 Hours of Sunshine (58% of Daylight Hours) in June
8
8 Hours of Sunshine (60% of Daylight Hours) in July
8
8 Hours of Sunshine (65% of Daylight Hours) in August
8
8 Hours of Sunshine (61% of Daylight Hours) in September
7
7 Hours of Sunshine (63% of Daylight Hours) in October
8
8 Hours of Sunshine (66% of Daylight Hours) in November
8
8 Hours of Sunshine (68% of Daylight Hours) in December
J F M A M J J A S O N D
11
11 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
13
13 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
11
11 Hours of Daylight in December
J F M A M J J A S O N D
Days with some Rain
Monthly Rainfall (mm)
17
17 Days with some Rain in January
12
12 Days with some Rain in February
12
12 Days with some Rain in March
11
11 Days with some Rain in April
15
15 Days with some Rain in May
18
18 Days with some Rain in June
20
20 Days with some Rain in July
19
19 Days with some Rain in August
19
19 Days with some Rain in September
17
17 Days with some Rain in October
18
18 Days with some Rain in November
18
18 Days with some Rain in December
J F M A M J J A S O N D
132
132 mm (5.2 inches) Monthly Rainfall in January
100
100 mm (3.9 inches) Monthly Rainfall in February
97
97 mm (3.8 inches) Monthly Rainfall in March
113
113 mm (4.4 inches) Monthly Rainfall in April
143
143 mm (5.6 inches) Monthly Rainfall in May
197
197 mm (7.8 inches) Monthly Rainfall in June
275
275 mm (10.8 inches) Monthly Rainfall in July
257
257 mm (10.1 inches) Monthly Rainfall in August
258
258 mm (10.2 inches) Monthly Rainfall in September
311
311 mm (12.2 inches) Monthly Rainfall in October
292
292 mm (11.5 inches) Monthly Rainfall in November
171
171 mm (6.7 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
M
Moderate Heat & Humidity in February
M
Moderate Heat & Humidity in March
H
High Heat & Humidity in April
H
High Heat & Humidity in May
H
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
H
High Heat & Humidity in December
J F M A M J J A S O N D
9
UV 9 (Very High) 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
9
UV 9 (Very High) in November
8
UV 8 (Very High) in December
J F M A M J J A S O N D
Sea Temperature (°C)
27
27 °C (81°F) Sea Temperature in January
26
26 °C (79°F) Sea Temperature in February
26
26 °C (79°F) Sea Temperature in March
27
27 °C (81°F) Sea Temperature in April
28
28 °C (82°F) Sea Temperature in May
28
28 °C (82°F) Sea Temperature in June
28
28 °C (82°F) Sea Temperature in July
28
28 °C (82°F) Sea Temperature in August
29
29 °C (84°F) Sea Temperature in September
29
29 °C (84°F) Sea Temperature in October
28
28 °C (82°F) Sea Temperature in November
27
27 °C (81°F) Sea Temperature in December
J F M A M J J A S O N D
Castries Climate Guide (Historical Weather Averages), Saint Lucia
Elev: 100 m   Long: 060°58'W   Lat: 14°00'N
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