Roseau weather in August
In August, Roseau sees average daytime highs of 28°C and overnight lows near 26°C, with 99 mm of rain across 18.4 wet days and about 12.5 hours of daylight. It is the 2nd-warmest and 4th-wettest month of the year here.
Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 49% of the time in August, and the air most often feels oppressive.
Daylight stretches from about 12 h 42 min at the start of August to 12 h 18 min by month's end. Set against the rest of the year, August is Roseau's 8th-clearest and 9th-windiest month. For the whole year in context, see Roseau's year-round climate.
- Daytime high
- 28°
- 2nd warmest
- Overnight low
- 26°
- 11th coldest
- Rainfall
- 99 mm
- 18.4 wet days
- Daylight
- 12 h 30 min
- 5:54 AM – 6:25 PM
- Cloud cover
- 48%
- 8th clearest
- Wind
- 26 km/h
- 9th windiest
- Solar energy
- 6.31 kWh/m²
- Travel score
- 5.4
- out of 10
Roseau is capital of Dominica.
- Density
- 3,069/km²
- people per km²
Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.
Temperature in August
Day-to-day highs hold fairly steady near 28°C through the month.
A typical August day in Roseau reaches about 28°C in the afternoon and slips back to 26°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 28°C. Set against its neighbours, August runs on par with July and on par with September.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high (°C) | 27 | 27 | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 | 28 |
| Avg low (°C) | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 |
| Avg high (°C) | Avg low (°C) | |
|---|---|---|
| 1 | 27 | 26 |
| 2 | 27 | 26 |
| 3 | 27 | 26 |
| 4 | 27 | 26 |
| 5 | 27 | 26 |
| 6 | 27 | 26 |
| 7 | 28 | 26 |
| 8 | 28 | 26 |
| 9 | 28 | 26 |
| 10 | 28 | 26 |
| 11 | 28 | 26 |
| 12 | 28 | 26 |
| 13 | 28 | 26 |
| 14 | 28 | 26 |
| 15 | 28 | 26 |
| 16 | 28 | 26 |
| 17 | 28 | 26 |
| 18 | 28 | 26 |
| 19 | 28 | 26 |
| 20 | 28 | 26 |
| 21 | 28 | 26 |
| 22 | 28 | 26 |
| 23 | 28 | 26 |
| 24 | 28 | 26 |
| 25 | 28 | 26 |
| 26 | 28 | 26 |
| 27 | 28 | 26 |
| 28 | 28 | 26 |
| 29 | 28 | 26 |
| 30 | 28 | 26 |
| 31 | 28 | 26 |
Roseau weather by month
How August compares with the rest of the year at a glance. August is the 2nd-warmest and 4th-wettest month here — the current month is highlighted below.
| Month | High / Low (°C) | Rainfall (mm) | Wet days | Daylight (hours) | Travel score |
|---|---|---|---|---|---|
| Jan | 26° / 24° | 32 | 12 | 11.2 | 7.1 |
| Feb | 25° / 24° | 19 | 7 | 11.5 | 7.8 |
| Mar | 25° / 24° | 19 | 6.9 | 11.9 | 7.8 |
| Apr | 26° / 25° | 29 | 8.3 | 12.3 | 7.2 |
| May | 27° / 25° | 44 | 10.2 | 12.7 | 6.7 |
| Jun | 27° / 26° | 47 | 10.5 | 12.9 | 6.4 |
| Jul | 27° / 26° | 76 | 16.4 | 12.8 | 5.8 |
| Aug | 28° / 26° | 99 | 18.4 | 12.5 | 5.4 |
| Sep | 28° / 26° | 113 | 17.1 | 12.1 | 5.3 |
| Oct | 28° / 26° | 118 | 19.1 | 11.7 | 5.2 |
| Nov | 27° / 26° | 101 | 17.1 | 11.3 | 5.7 |
| Dec | 26° / 25° | 48 | 14.2 | 11.1 | 6.4 |
Cloud cover in August
The sky is clear or mostly clear about 49% of the time in August.
Beyond those clear spells, partly cloudy skies cover about 16% of August, with mostly cloudy or overcast conditions the remaining 35%. Skies tend to cloud over as the month goes on.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Clearer (%) | 69 | 69 | 68 | 68 | 67 | 67 | 67 | 66 | 66 | 66 | 67 | 67 | 67 | 67 | 67 | 67 | 67 | 66 | 66 | 66 | 66 | 65 | 65 | 64 | 63 | 62 | 62 | 61 | 59 | 59 | 59 |
| Cloudier (%) | 31 | 31 | 32 | 32 | 33 | 33 | 33 | 34 | 34 | 34 | 33 | 33 | 33 | 33 | 33 | 33 | 33 | 34 | 34 | 34 | 34 | 35 | 35 | 36 | 37 | 38 | 38 | 39 | 41 | 41 | 41 |
| Clearer (%) | Cloudier (%) | |
|---|---|---|
| 1 | 69 | 31 |
| 2 | 69 | 31 |
| 3 | 68 | 32 |
| 4 | 68 | 32 |
| 5 | 67 | 33 |
| 6 | 67 | 33 |
| 7 | 67 | 33 |
| 8 | 66 | 34 |
| 9 | 66 | 34 |
| 10 | 66 | 34 |
| 11 | 67 | 33 |
| 12 | 67 | 33 |
| 13 | 67 | 33 |
| 14 | 67 | 33 |
| 15 | 67 | 33 |
| 16 | 67 | 33 |
| 17 | 67 | 33 |
| 18 | 66 | 34 |
| 19 | 66 | 34 |
| 20 | 66 | 34 |
| 21 | 66 | 34 |
| 22 | 65 | 35 |
| 23 | 65 | 35 |
| 24 | 64 | 36 |
| 25 | 63 | 37 |
| 26 | 62 | 38 |
| 27 | 62 | 38 |
| 28 | 61 | 39 |
| 29 | 59 | 41 |
| 30 | 59 | 41 |
| 31 | 59 | 41 |
Chance of precipitation in August
Roseau gets around 99 mm of rain over 18.4 wet days in August. The line is the day-by-day chance of measurable precipitation.
Day to day, the chance of measurable rain averages around 59% and peaks near 62% on the wettest days. The odds ease toward the end of the month.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Rain chance (%) | 61 | 61 | 62 | 62 | 62 | 62 | 62 | 62 | 62 | 62 | 62 | 62 | 62 | 62 | 61 | 61 | 61 | 60 | 60 | 59 | 59 | 58 | 58 | 57 | 56 | 56 | 55 | 55 | 54 | 54 | 53 |
| Rain chance (%) | |
|---|---|
| 1 | 61 |
| 2 | 61 |
| 3 | 62 |
| 4 | 62 |
| 5 | 62 |
| 6 | 62 |
| 7 | 62 |
| 8 | 62 |
| 9 | 62 |
| 10 | 62 |
| 11 | 62 |
| 12 | 62 |
| 13 | 62 |
| 14 | 62 |
| 15 | 61 |
| 16 | 61 |
| 17 | 61 |
| 18 | 60 |
| 19 | 60 |
| 20 | 59 |
| 21 | 59 |
| 22 | 58 |
| 23 | 58 |
| 24 | 57 |
| 25 | 56 |
| 26 | 56 |
| 27 | 55 |
| 28 | 55 |
| 29 | 54 |
| 30 | 54 |
| 31 | 53 |
Humidity in August
Most of August feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.
By dew point, August lands in the oppressive band about 74% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Oppressive (%) | 80 | 79 | 79 | 78 | 78 | 78 | 77 | 77 | 77 | 76 | 76 | 75 | 75 | 74 | 74 | 73 | 73 | 72 | 72 | 71 | 71 | 71 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 70 | 70 |
| Miserable (%) | 20 | 21 | 21 | 22 | 22 | 22 | 23 | 23 | 23 | 24 | 24 | 25 | 25 | 26 | 26 | 27 | 27 | 28 | 28 | 29 | 29 | 29 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 | 30 |
| Oppressive (%) | Miserable (%) | |
|---|---|---|
| 1 | 80 | 20 |
| 2 | 79 | 21 |
| 3 | 79 | 21 |
| 4 | 78 | 22 |
| 5 | 78 | 22 |
| 6 | 78 | 22 |
| 7 | 77 | 23 |
| 8 | 77 | 23 |
| 9 | 77 | 23 |
| 10 | 76 | 24 |
| 11 | 76 | 24 |
| 12 | 75 | 25 |
| 13 | 75 | 25 |
| 14 | 74 | 26 |
| 15 | 74 | 26 |
| 16 | 73 | 27 |
| 17 | 73 | 27 |
| 18 | 72 | 28 |
| 19 | 72 | 28 |
| 20 | 71 | 29 |
| 21 | 71 | 29 |
| 22 | 71 | 29 |
| 23 | 70 | 30 |
| 24 | 70 | 30 |
| 25 | 70 | 30 |
| 26 | 70 | 30 |
| 27 | 70 | 30 |
| 28 | 70 | 30 |
| 29 | 70 | 30 |
| 30 | 70 | 30 |
| 31 | 70 | 30 |
Wind in August
Winds average 26 km/h in August.
Across August, daily wind ranges from about 23 km/h on the calmest days to 28 km/h at its breeziest. It stays fairly steady from day to day.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wind speed (km/h) | 28 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 27 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 26 | 25 | 25 | 25 | 25 | 25 | 25 | 24 | 24 | 24 | 24 | 24 | 24 | 23 |
| Feels | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy | breezy |
| Wind speed (km/h) | Feels | |
|---|---|---|
| 1 | 28 | breezy |
| 2 | 27 | breezy |
| 3 | 27 | breezy |
| 4 | 27 | breezy |
| 5 | 27 | breezy |
| 6 | 27 | breezy |
| 7 | 27 | breezy |
| 8 | 27 | breezy |
| 9 | 27 | breezy |
| 10 | 27 | breezy |
| 11 | 26 | breezy |
| 12 | 26 | breezy |
| 13 | 26 | breezy |
| 14 | 26 | breezy |
| 15 | 26 | breezy |
| 16 | 26 | breezy |
| 17 | 26 | breezy |
| 18 | 26 | breezy |
| 19 | 25 | breezy |
| 20 | 25 | breezy |
| 21 | 25 | breezy |
| 22 | 25 | breezy |
| 23 | 25 | breezy |
| 24 | 25 | breezy |
| 25 | 24 | breezy |
| 26 | 24 | breezy |
| 27 | 24 | breezy |
| 28 | 24 | breezy |
| 29 | 24 | breezy |
| 30 | 24 | breezy |
| 31 | 23 | breezy |
Sunrise & sunset in August
Daylight runs from about 12 h 42 min at the start of August to 12 h 18 min by month's end. The lit band spans sunrise to sunset each day.
Days shrink by about 24 minutes over August. Sunrise moves from 5:51 AM to 5:56 AM, and sunset from 6:32 PM to 6:15 PM.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight (h) | 12.7 | 12.7 | 12.7 | 12.7 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.6 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.5 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.4 | 12.3 | 12.3 | 12.3 |
| Sunrise (AM) | 5:51 | 5:51 | 5:51 | 5:52 | 5:52 | 5:52 | 5:52 | 5:53 | 5:53 | 5:53 | 5:53 | 5:53 | 5:54 | 5:54 | 5:54 | 5:54 | 5:54 | 5:54 | 5:55 | 5:55 | 5:55 | 5:55 | 5:55 | 5:55 | 5:55 | 5:56 | 5:56 | 5:56 | 5:56 | 5:56 | 5:56 |
| Sunset (PM) | 6:32 | 6:32 | 6:32 | 6:31 | 6:31 | 6:30 | 6:30 | 6:29 | 6:29 | 6:28 | 6:28 | 6:27 | 6:27 | 6:26 | 6:26 | 6:25 | 6:25 | 6:24 | 6:23 | 6:23 | 6:22 | 6:21 | 6:21 | 6:20 | 6:19 | 6:19 | 6:18 | 6:17 | 6:17 | 6:16 | 6:15 |
| Daylight (h) | Sunrise (AM) | Sunset (PM) | |
|---|---|---|---|
| 1 | 12.7 | 5:51 | 6:32 |
| 2 | 12.7 | 5:51 | 6:32 |
| 3 | 12.7 | 5:51 | 6:32 |
| 4 | 12.7 | 5:52 | 6:31 |
| 5 | 12.6 | 5:52 | 6:31 |
| 6 | 12.6 | 5:52 | 6:30 |
| 7 | 12.6 | 5:52 | 6:30 |
| 8 | 12.6 | 5:53 | 6:29 |
| 9 | 12.6 | 5:53 | 6:29 |
| 10 | 12.6 | 5:53 | 6:28 |
| 11 | 12.6 | 5:53 | 6:28 |
| 12 | 12.6 | 5:53 | 6:27 |
| 13 | 12.6 | 5:54 | 6:27 |
| 14 | 12.5 | 5:54 | 6:26 |
| 15 | 12.5 | 5:54 | 6:26 |
| 16 | 12.5 | 5:54 | 6:25 |
| 17 | 12.5 | 5:54 | 6:25 |
| 18 | 12.5 | 5:54 | 6:24 |
| 19 | 12.5 | 5:55 | 6:23 |
| 20 | 12.5 | 5:55 | 6:23 |
| 21 | 12.5 | 5:55 | 6:22 |
| 22 | 12.4 | 5:55 | 6:21 |
| 23 | 12.4 | 5:55 | 6:21 |
| 24 | 12.4 | 5:55 | 6:20 |
| 25 | 12.4 | 5:55 | 6:19 |
| 26 | 12.4 | 5:56 | 6:19 |
| 27 | 12.4 | 5:56 | 6:18 |
| 28 | 12.4 | 5:56 | 6:17 |
| 29 | 12.3 | 5:56 | 6:17 |
| 30 | 12.3 | 5:56 | 6:16 |
| 31 | 12.3 | 5:56 | 6:15 |
Solar energy in August
Average shortwave solar energy reaching the ground each day in August, about 6.31 kWh/m².
For context, solar energy here swings from a low near 4.81 kWh/m² to a high of 6.7 kWh/m² in April across the year — August's 6.31 kWh/m² falls in the middle.
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Solar energy (kWh/m²) | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.4 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.3 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 | 6.2 |
| Level | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense | Intense |
| Solar energy (kWh/m²) | Level | |
|---|---|---|
| 1 | 6.4 | Intense |
| 2 | 6.4 | Intense |
| 3 | 6.4 | Intense |
| 4 | 6.4 | Intense |
| 5 | 6.4 | Intense |
| 6 | 6.4 | Intense |
| 7 | 6.4 | Intense |
| 8 | 6.4 | Intense |
| 9 | 6.4 | Intense |
| 10 | 6.4 | Intense |
| 11 | 6.4 | Intense |
| 12 | 6.3 | Intense |
| 13 | 6.3 | Intense |
| 14 | 6.3 | Intense |
| 15 | 6.3 | Intense |
| 16 | 6.3 | Intense |
| 17 | 6.3 | Intense |
| 18 | 6.3 | Intense |
| 19 | 6.3 | Intense |
| 20 | 6.3 | Intense |
| 21 | 6.3 | Intense |
| 22 | 6.3 | Intense |
| 23 | 6.3 | Intense |
| 24 | 6.3 | Intense |
| 25 | 6.2 | Intense |
| 26 | 6.2 | Intense |
| 27 | 6.2 | Intense |
| 28 | 6.2 | Intense |
| 29 | 6.2 | Intense |
| 30 | 6.2 | Intense |
| 31 | 6.2 | Intense |
Hazard calendar for Roseau
In August, Roseau sits inside its atlantic hurricane and rainy season season. The full year is below, with each hazard's peak months called out.
Roseau sits in the Atlantic hurricane belt; the season peaks August–October.
Roseau's rainy season runs July–November, when most of the year's rain falls.
Roseau sees seasonal dust haze (June–July), heaviest in June.
Is August a good time to visit Roseau?
Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).
August is a reasonable time to visit Roseau for sightseeing.
What to pack for Roseau in August
From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.
In August, Roseau sees daytime highs around 28°C and nights near 26°C. Pack light clothes, rain gear and sun protection. Worth having: a windbreaker. About 18 days see rain.
Sea temperature near Roseau in August
The nearest coast averages about 29°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.
The sea offshore is warmest in September at about 29°C and coldest in February near 27°C.
The water stays above 20°C all year — warm enough for a swim any month.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sea temperature (°C) | 27 | 27 | 27 | 27 | 28 | 28 | 28 | 29 | 29 | 29 | 29 | 28 |
| Comfort | Warm | Warm | Warm | Warm | Warm | Warm | Tropical | Tropical | Tropical | Tropical | Tropical | Warm |
| Sea temperature (°C) | Comfort | |
|---|---|---|
| Jan | 27 | Warm |
| Feb | 27 | Warm |
| Mar | 27 | Warm |
| Apr | 27 | Warm |
| May | 28 | Warm |
| Jun | 28 | Warm |
| Jul | 28 | Tropical |
| Aug | 29 | Tropical |
| Sep | 29 | Tropical |
| Oct | 29 | Tropical |
| Nov | 29 | Tropical |
| Dec | 28 | Warm |
UV index in Roseau in August
Clear-sky midday UV in August peaks around 11 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.
Under clear skies, the midday UV index in Roseau peaks around March 21 at about 13 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 13 at about 8 (very high).
The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UV index (midday) | 9 | 11 | 14 | 13 | 12 | 11 | 12 | 11 | 12 | 11 | 8 | 8 |
| Level | Very high | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Extreme | Very high | Very high |
| UV index (midday) | Level | |
|---|---|---|
| Jan | 9 | Very high |
| Feb | 11 | Extreme |
| Mar | 14 | Extreme |
| Apr | 13 | Extreme |
| May | 12 | Extreme |
| Jun | 11 | Extreme |
| Jul | 12 | Extreme |
| Aug | 11 | Extreme |
| Sep | 12 | Extreme |
| Oct | 11 | Extreme |
| Nov | 8 | Very high |
| Dec | 8 | Very high |
Air quality in Roseau in August
Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.
Air quality in Roseau is worst in June — around 28 µg/m³ PM2.5 (moderate), about 3.1× the cleanest month (December, 9 µg/m³).
Modeled monthly averages (CAMS reanalysis, 2015–2024).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PM2.5 (µg/m³) | 10 | 13 | 11 | 15 | 18 | 28 | 26 | 21 | 16 | 18 | 12 | 9 |
| Level | Good | Moderate | Good | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Moderate | Good |
| PM2.5 (µg/m³) | Level | |
|---|---|---|
| Jan | 10 | Good |
| Feb | 13 | Moderate |
| Mar | 11 | Good |
| Apr | 15 | Moderate |
| May | 18 | Moderate |
| Jun | 28 | Moderate |
| Jul | 26 | Moderate |
| Aug | 21 | Moderate |
| Sep | 16 | Moderate |
| Oct | 18 | Moderate |
| Nov | 12 | Moderate |
| Dec | 9 | Good |
Where is Roseau?
Roseau sits at 15.3°N, 61.4°W, 11 m above sea level, in Dominica. The nearest listed city is Sainte-Marie, 72 km away.
Topography around Roseau
How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Roseau.
Within 3 km, the terrain around Roseau has significant variations in elevation — a maximum elevation change of 417 m around an average of 66 m above sea level; within 16 km, very significant variations in elevation — a maximum elevation change of 1,383 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,389 m.
The land around Roseau is covered by water (55%) and trees (38%) within 3 km, water (58%) and trees (41%) within 16 km, and water (89%) within 80 km.
Dominica travel facts
- Travel advisory
- Level 1
- Exercise Normal Precautions
- Power plugs
- Type D / G
- 230 V · 50 Hz
- Prices
- ≈ 48% of US
- price level, 2025
- GDP per capita
- $10,989
- 2025
- Homicide rate
- 27.1
- per 100k, 2023
- Road deaths
- 10.9
- per 100k/yr, 2016
- Income group
- Upper middle
- World Bank
- Religion
Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.
Data sources
Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Roseau (15.3017°, -61.3881°, elevation 11 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).