Roseau weather in January
January in Roseau: warm, dry, with clean air — one of the best months to visit.
#2 of 12 months in Roseau · #118 of 604 destinations to visit in January · comfort 84/100 (tier A)
Updated June 2026 · climate normals from ERA5 reanalysis
Roseau climate normals — January
| Daytime high | 26°C / 79°F | 🌤 warm |
|---|---|---|
| Nighttime low | 24°C / 76°F | |
| Feels like (high) | 27°C / 81°F | |
| Rainfall | 28 mm / 1.1 in | ☀️ dry |
| Rainy days | 11 days | |
| Humidity | 75% | 💦 very humid |
| Dew point | 20°C / 69°F | |
| Sunshine | 10.5 h/day | |
| Daylight | 11.3 h | |
| Wind | 31 km/h / 19 mph | |
| Air quality (US AQI) | 48 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
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Roseau in January — FAQ
- Is January a good time to visit Roseau?
- January in Roseau: warm, dry, with clean air — one of the best months to visit. It ranks #2 of 12 months for Roseau on SeasonMap's comfort score (84/100).
- What is the weather like in Roseau in January?
- In January, Roseau averages a daily high of 26°C and a low of 24.3°C, with about 27.8 mm of rain over roughly 11.4 rainy days.
- What is the air quality in Roseau in January?
- Roseau has a mean US Air Quality Index of about 48 in January.