St. Lucia · December
Low seasonSt. Lucia · North America
Climate Overview
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Ø day, range from coolest to warmest dayØ dayrange | 29° (84°)27– (81–)30 (86) | 29° (84°)28– (82–)30 (86) | 30° (86°)28– (82–)30 (86) | 30° (86°)28– (82–)31 (88) | 31° (88°)29– (84–)32 (90) | 31° (88°)29– (84–)32 (90) | 31° (88°)28– (82–)32 (90) | 31° (88°)29– (84–)32 (90) | 32° (90°)29– (84–)32 (90) | 31° (88°)29– (84–)32 (90) | 31° (88°)28– (82–)31 (88) | 30° (86°)27– (81–)30 (86) |
Ø night, range from coldest to warmest nightØ nightrange | 25° (77°)22– (72–)26 (79) | 25° (77°)22– (72–)26 (79) | 25° (77°)22– (72–)26 (79) | 26° (79°)22– (72–)27 (81) | 27° (81°)24– (75–)27 (81) | 27° (81°)23– (73–)28 (82) | 27° (81°)24– (75–)28 (82) | 27° (81°)23– (73–)28 (82) | 26° (79°)23– (73–)28 (82) | 26° (79°)23– (73–)28 (82) | 26° (79°)23– (73–)27 (81) | 25° (77°)21– (70–)27 (81) |
☀️Sunshine | 9h UV 8 | 9h UV 9 | 9h UV 9 | 9h UV 9 | 9h UV 9 | 8h UV 8 | 9h UV 9 | 8h UV 9 | 8h UV 9 | 8h UV 8 | 8h UV 8 | 9h UV 7 |
🌊Water Temp | 27° (81°) | 27° (81°) | 27° (81°) | 28° (82°) | 28° (82°) | 28° (82°) | 29° (84°) | 29° (84°) | 30° (86°) | 29° (84°) | 29° (84°) | 28° (82°) |
🌧Rain Days | 10d98mm (3.8") | 5d47mm (1.8") | 6d50mm (2.0") | 6d93mm (3.6") | 7d73mm (2.9") | 11d158mm (6.2") | 13d161mm (6.4") | 13d188mm (7.4") | 10d144mm (5.6") | 14d207mm (8.1") | 13d209mm (8.2") | 11d102mm (4.0") |
Best travel time current monthØ = average · small figures = range: coolest–warmest day / coldest–warmest nightClimate data 2005–2025 · Source: ERA5 + station data
Off-season — lowest travel prices with still acceptable climate.
December in St. Lucia is generally manageable, but with 11 rain days it's not a reliably sunny month. Better conditions can be found in February, March, April, and May.
Daytime highs average 30°C (86°F), cooling to 25°C (77°F) at night (daily average: 28°C (82°F)). The coldest nights drop to around 21°C (70°F). The sun shines an average of 9 hours per day; there are 11 rain days with 102 mm (4.0 in) total. The water is a warm 28°C (82°F) — perfect for snorkelling and swimming.
Light clothing is enough — the evenings stay mild too. Good conditions for sightseeing and excursions.
Packing list for St. Lucia in December
- Light summer clothes
- Swimwear and beach towel
- SPF 50 sunscreen
- Sunglasses
- Sun hat
- Light umbrella or rain poncho
- Insect repellent
- Travel first-aid kit
Frequently Asked Questions
- Is December a good time to visit St. Lucia?
- December is not an optimal month for St. Lucia (Score: 71/100), but it is manageable. For better conditions, consider February, March, April, and May.
- How warm is it in St. Lucia in December?
- In December, St. Lucia sees daily highs of 30°C (86°F). Nights cool to 25°C (77°F), with a daily average of 28°C (82°F). The coldest nights drop to around 21°C (70°F).
- How much rain falls in St. Lucia in December?
- In December, St. Lucia receives an average of 102 mm (4.0 in) of rain over 11 rain days. An umbrella may occasionally be needed.
- How many sunshine hours does St. Lucia get in December?
- St. Lucia averages 9 sunshine hours per day in December — close to the annual average.
- How warm is the water in St. Lucia in December?
- Water temperature in St. Lucia in December averages 28°C (82°F) — ideal for swimming and snorkelling.
