Climate Chart of Roseau, Dominica
Monthly data: Temperature °C, Rain (mm), Sunshine (h) · 2013–2023
For Roseau, Dominica, the climate data cover 2013–2023. Monthly mean temperatures range from February at 24.7 °C to September at 27.4 °C, giving a broad sense of the warmth recorded through the year. Daily rainfall and sunshine also vary by month, so visitors may want to weigh their priorities rather than treat one period as ideal for every activity.
Climate overview
Temperature
Monthly mean temperatures are highest in September, at 27.4 °C, and lowest in February, at 24.7 °C. These are averages for each month, not daytime maximum temperatures, so they describe the overall monthly pattern rather than how warm an individual afternoon may feel. The unweighted mean of the monthly temperature means is 26.1 °C. It summarises the calendar-month means equally and should not be read as a day-weighted annual average.
Rain
Mean daily rainfall is highest in September, at 4.58 mm/day, and lowest in January, at 1.73 mm/day. The lower monthly mean can help identify a period for visitors prioritising less average rainfall, while the higher one is a useful prompt to prepare for wet weather; neither value tells you how often rain falls or guarantees conditions on a particular day. The unweighted mean of the monthly daily-rainfall means is 2.84 mm/day. These figures describe average daily amounts, not monthly rainfall totals.
Sunshine
Mean daily sunshine reaches its highest monthly value in May, at 11.58 hours/day, and its lowest in November, at 9.95 hours/day. These averages can help with planning outdoor sightseeing around relative sunshine, but sunshine duration is not the same as day length and does not promise clear weather on a given day. Across the calendar-month means, the unweighted mean daily sunshine duration is 10.81 hours/day; it is not a day-weighted annual average.
Best Travel Time Guide for Roseau, Dominica: Ideal Seasons and Weather Insights
If lower average rainfall is your priority, January is the relevant option in these records, with mean daily rainfall of 1.73 mm/day. This is a monthly average, not a promise of dry days, so pack for changeable conditions; for September, where the mean is 4.58 mm/day, allow for rain in outdoor plans. For visitors who prefer cooler monthly averages, February is the coolest month in the temperature record, with a monthly mean of 24.7 °C. This does not specify daytime highs or the conditions on any particular date. For daylight outdoor planning, mean daily sunshine is highest in May at 11.58 hours/day, and lowest in November at 9.95 hours/day. These are sunshine-duration averages, not measures of day length or guarantees of uninterrupted sunshine.
Climate Data Overview for Roseau, Dominica
Explore the comprehensive climate data for Roseau, Dominica. This detailed table provides valuable insights into temperature variations, precipitation levels, and seasonal changes, helping you understand the unique weather patterns of this region.
| Month | Average: Temperature °C | Rain (mm) / day | Snow (mm) / day | Sunshine (h) / day |
|---|---|---|---|---|
| Jan | 24.9 | 1.73 | 0.00 | 10.43 |
| Feb | 24.7 | 2.00 | 0.00 | 10.71 |
| Mar | 24.9 | 1.93 | 0.00 | 11.13 |
| Apr | 25.5 | 1.80 | 0.00 | 11.55 |
| May | 26.3 | 1.86 | 0.00 | 11.58 |
| Jun | 26.8 | 2.44 | 0.00 | 11.29 |
| Jul | 26.8 | 3.60 | 0.00 | 11.27 |
| Aug | 27.1 | 3.86 | 0.00 | 11.14 |
| Sep | 27.4 | 4.58 | 0.00 | 10.61 |
| Oct | 27.0 | 3.86 | 0.00 | 9.97 |
| Nov | 26.3 | 3.95 | 0.00 | 9.95 |
| Dec | 25.6 | 2.41 | 0.00 | 10.06 |
| Average | 26.1 | 2.84 | 0.00 | 10.81 |
