Roseau, Dominica Weather
Roseau hourly forecast: next 24 hours
Today's high of 84°F (29°C) is right in line with the typical August high of 84°F (29°C).
Current conditions in detail
Roseau weather tomorrow (Thursday, August 27)
Tomorrow in Roseau looks sunny, with a high of 83° and an overnight low of 80°. Precipitation chance is modest at 15%. Winds top out near 14 mph, and the UV index reaches 12 (extreme).
Roseau 14-day forecast
About the weather in Roseau
Roseau has one of the steadier climates in our dataset. Average highs move only 3°C across the whole year - from 80°F (26°C) in February to 85°F (29°C) in September - so the practical difference between seasons here is rainfall and daylight, not warmth.
Roseau weather: quick facts
- Hottest month: September - highs near 85°F (29°C)
- Coldest month: February - highs near 80°F (26°C)
- Decade extremes (2015-2024): 90°F (32°C) high · 69°F (20°C) low
- Wettest month: September (19 rainy days) · Sunniest: April (11.8 h sun/day)
- Climate type: tropical wet-and-dry
- Annual swing: 3°C between the average warmest and coolest month · day to night: 3°C
- Average humidity: 80%
Temperatures through the year
Relative humidity averages 80% across the year, more humid than roughly 84% of the cities we track - enough that summer afternoons feel hotter than the thermometer says, which is what the dew point converter is for. February sits at the other end of the year: 80°F (26°C) by day, 74°F (23°C) at night. September is the warm end of the year, averaging 85°F (29°C) by day and 78°F (26°C) overnight. Between the average September and the average February lie 3°C, a narrower spread than all but 7% of the 3496 cities in our dataset.
Rain, sun and snow
April is the brightest month at 11.8 hours of sun a day, against an annual average of 11.1 - sunnier than 97% of the 3496 cities in our dataset. Days and nights are about 3°C apart on average - narrower than almost anywhere else we cover. September is the wettest month at 5.5 inches (139 mm) over 19 days; April is the driest. The gridded 2015-2024 daily record for this location tops out at 90°F (32°C) and bottoms at 69°F (20°C) - decade extremes, not all-time station records.
Season by season
March through May
March through May in Roseau runs hot, with daytime highs averaging 82°F (28°C) and nights around 76°F (24°C); rain falls on around 49 of the 90 days. Daylight is generous - around 11.6 hours of sun a day.
June through August
June through August in Roseau is hot, with daytime highs averaging 84°F (29°C) and nights around 78°F (25°C); rain falls on around 64 of the 90 days. Daylight is generous - around 11.3 hours of sun a day.
September through November
September through November in Roseau runs hot, with daytime highs averaging 84°F (29°C) and nights around 78°F (25°C); rain falls on around 60 of the 90 days. Daylight is generous - around 10.6 hours of sun a day.
December through February
Through December through February, Roseau brings comfortable warmth: 80°F (27°C) by day, 75°F (24°C) after dark, and rain falls on around 48 of the 90 days. Daylight is generous - around 10.8 hours of sun a day.
Average temperatures in Roseau by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 80° | 74° | 15 | 2.5 in | 10.8 h/day | 78% |
| February | 80° | 74° | 15 | 2.5 in | 11.0 h/day | 78% |
| March | 80° | 74° | 16 | 2.7 in | 11.5 h/day | 78% |
| April | 82° | 75° | 18 | 2.2 in | 11.8 h/day | 79% |
| May | 83° | 77° | 16 | 2.3 in | 11.5 h/day | 79% |
| June | 83° | 78° | 19 | 3.3 in | 11.3 h/day | 81% |
| July | 83° | 78° | 23 | 5.0 in | 11.3 h/day | 83% |
| August | 84° | 78° | 22 | 4.8 in | 11.2 h/day | 83% |
| September | 85° | 78° | 19 | 5.5 in | 11.0 h/day | 82% |
| October | 84° | 78° | 20 | 4.5 in | 10.6 h/day | 82% |
| November | 83° | 77° | 21 | 5.0 in | 10.3 h/day | 82% |
| December | 81° | 75° | 18 | 3.2 in | 10.5 h/day | 80% |