Over the past decade (2015–2024), December in Mauritius has marked the onset of the summer season, characterized by warmer temperatures, increased humidity, and a rise in rainfall.
General Weather Conditions:
- December signifies the full onset of summer in Mauritius, with temperatures rising across all regions.
- Rainfall increases compared to November, with regions receiving between 110 mm (4.3 inches) to 150 mm (5.9 inches), often in the form of brief but intense showers.
- Humidity levels are higher, contributing to a more humid atmosphere.
- Sea temperatures warm to around 26°C (79°F), enhancing the appeal for swimming and other water activities.
- Sunshine hours remain ample, providing plenty of daylight for outdoor pursuits.
Here’s an overview of the typical weather patterns across various regions:
Port Louis (Northwest Coast):
- Temperature: Average highs around 30°C (86°F) and lows near 23°C (73°F).
- Rainfall: Approximately 120 mm (4.7 inches) over about 12 days.
- Humidity: Relative humidity averages 76%.
- Sea Temperature: Around 26°C (79°F), ideal for aquatic activities.
- Sunshine: Typically 8 hours of sunshine daily.
- UV Index: High, with an average maximum UV index of 12.
Curepipe (Central Plateau):
- Temperature: Average highs around 26°C (79°F) and lows near 20°C (68°F).
- Rainfall: Higher precipitation with about 150 mm (5.9 inches) over 14 days.
- Humidity: Relative humidity stands at 81%.
- Sunshine: Approximately 6 hours of sunshine daily.
Mahebourg (Southeast Coast):
- Temperature: Average highs around 29°C (84°F) and lows near 22°C (72°F).
- Rainfall: Experiences rainfall totaling 130 mm (5.1 inches) over 13 days in December.
- Humidity: Relative humidity averages 78%.
- Sunshine: Typically 7 hours of sunshine daily.
- Sea Temperature: Around 26°C (79°F), suitable for water activities.
Souillac (South Coast):
- Temperature: Average highs around 28°C (82°F) and lows near 21°C (70°F).
- Rainfall: December sees about 140 mm (5.5 inches) of rainfall over 13 days.
- Humidity: Relative humidity averages 79%.
- Sunshine: Typically 7 hours of sunshine daily.
- Sea Temperature: Around 26°C (79°F).
Tamarin (West Coast):
- Temperature: Average highs around 30°C (86°F) and lows near 23°C (73°F).
- Rainfall: December receives approximately 110 mm (4.3 inches) over 11 days.
- Humidity: Relative humidity averages 75%.
- Sunshine: Typically 8.5 hours of sunshine daily.
- Sea Temperature: Around 26°C (79°F).
Plaine Magnien (Southeast):
- Temperature: Average highs around 29°C (84°F) and lows near 22°C (72°F).
- Rainfall: December sees about 125 mm (4.9 inches) of rainfall over 12 days.
- Humidity: Relative humidity averages 77%.
- Sunshine: Typically 7.5 hours of sunshine daily.
- Sea Temperature: Around 26°C (79°F).
Flic en Flac (West Coast):
- Temperature: Average high of 30°C (86°F) and low of 24°C (75°F).
- Rainfall: Approximately 50mm (1.97 inches) over 13.5 days.
- Humidity: Around 77%.
- Sea Temperature: Approximately 27°C (81°F).
- Sunshine: Averages 8 hours per day.
- UV Index: High, with an average maximum UV index of 7.
Trou aux Biches (North):
- Temperature: Average high of 28.3°C (82.9°F) and low of 25.2°C (77.4°F).
- Rainfall: Approximately 50mm (1.97 inches) over 13.5 days.
- Humidity: Around 78%.
- Sea Temperature: Approximately 27°C (81°F).
- Sunshine: Averages 8 hours per day.
- UV Index: High, with an average maximum UV index of 7.
Grand Bay (North):
- Temperature: Average high of 28.3°C (82.9°F) and low of 25.2°C (77.4°F).
- Rainfall: Approximately 50mm (1.97 inches) over 13.5 days.
- Humidity: Around 78%.
- Sea Temperature: Approximately 27°C (81°F).
- Sunshine: Averages 8 hours per day.
- UV Index: High, with an average maximum UV index of 7.
Le Morne (South)
- Temperature: Average highs around 28°C (82°F) and lows near 21°C (70°F).
- Rainfall: December sees about 140 mm (5.5 inches) of rainfall over 13 days.
- Humidity: Relative humidity averages 79%.
- Sunshine: Typically 7 hours of sunshine daily.
- Sea Temperature: Around 26°C (79°F).
Belle Mare (Eastcoast):
- Temperature: Average high: 27.4°C (81.3°F), Average low: 25.1°C (77.2°F)
- Rainfall: Total precipitation: Approximately 59mm (2.32 inches), Number of rainfall days: Around 15.5 days
- Humidity: Approximately 77%
- Sea Temperature: Approximately 27°C (80.6°F)
- Sunshine: Average of 10.2 hours of sunshine per day
- UV Index: Average daily maximum UV index: 7 (High)
While specific year-to-year variations exist, these patterns provide a general overview of December weather across Mauritius’s regions over the past decade.
December
| Location | Avg. High Temp (°C/°F) | Avg. Low Temp (°C/°F) | Avg. Rainfall (mm) | Avg. Sea Temp (°C/°F) |
|---|---|---|---|---|
| Flic en Flac | 28 / 82 | 22 / 72 | 118 | 26 / 79 |
| Tamarin | 28 / 82 | 22 / 72 | 118 | 26 / 79 |
| Grand Baie | 28 / 82 | 22 / 72 | 118 | 26 / 79 |
| Le Morne | 28 / 82 | 22 / 72 | 118 | 26 / 79 |
| Belle Mare | 28 / 82 | 22 / 72 | 118 | 26 / 79 |
| Blue Bay | 28 / 82 | 22 / 72 | 118 | 26 / 79 |
| Trou aux Biches | 28 / 82 | 22 / 72 | 118 | 26 / 79 |
| For Comparison | ||||
| London | 7 / 45 | 2 / 36 | 59 | – |
| New York | 5 / 41 | -2 / 28 | 94 | 7 / 45 |
| Paris | 6 / 43 | 3 / 37 | 51 | – |
| Sydney | 25 / 77 | 17 / 63 | 77 | 22 / 72 |
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