Roseau weather in December
December in Roseau: hot, a little rain, with clean air — an excellent time to visit.
#7 of 12 months in Roseau · #116 of 604 destinations to visit in December · comfort 83/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Roseau climate normals — December
| Daytime high | 27°C / 80°F | 🥵 hot |
|---|---|---|
| Nighttime low | 25°C / 77°F | |
| Feels like (high) | 29°C / 84°F | |
| Rainfall | 38 mm / 1.5 in | 🌦 some rain |
| Rainy days | 13 days | |
| Humidity | 78% | 💦 very humid |
| Dew point | 22°C / 71°F | |
| Sunshine | 10.2 h/day | |
| Daylight | 11.2 h | |
| Wind | 30 km/h / 19 mph | |
| Air quality (US AQI) | 39 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Roseau in December — FAQ
- Is December a good time to visit Roseau?
- December in Roseau: hot, a little rain, with clean air — an excellent time to visit. It ranks #7 of 12 months for Roseau on SeasonMap's comfort score (83/100).
- What is the weather like in Roseau in December?
- In December, Roseau averages a daily high of 26.8°C and a low of 25.1°C, with about 37.6 mm of rain over roughly 13 rainy days.
- What is the air quality in Roseau in December?
- Roseau has a mean US Air Quality Index of about 39 in December.