Roseau weather in July

In July, Roseau sees average daytime highs of 27°C and overnight lows near 26°C, with 76 mm of rain across 16.4 wet days and about 12.8 hours of daylight. It is the 4th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 53% of the time in July, and the air most often feels oppressive.

Daylight stretches from about 12 h 54 min at the start of July to 12 h 42 min by month's end. Set against the rest of the year, July is Roseau's 7th-clearest and 4th-windiest month. For the whole year in context, see Roseau's year-round climate.

Daytime high
27°
4th warmest
Overnight low
26°
9th coldest
Rainfall
76 mm
16.4 wet days
Daylight
12 h 48 min
5:46 AM – 6:36 PM
Cloud cover
45%
7th clearest
Wind
29 km/h
4th windiest
Solar energy
6.45 kWh/m²
Travel score
5.8
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 July

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical July day in Roseau reaches about 27°C in the afternoon and slips back to 26°C overnight — a 1°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, July runs on par with June and on par with August.

24°26°28°30°32°151015202531
Avg high (°C)Avg low (°C)
12726
22726
32726
42726
52726
62726
72726
82726
92726
102726
112726
122726
132726
142726
152726
162726
172726
182726
192726
202726
212726
222726
232726
242726
252726
262726
272726
282726
292726
302726
312726

Roseau weather by month

How July compares with the rest of the year at a glance. July is the 4th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan26° / 24°321211.27.1
Feb25° / 24°19711.57.8
Mar25° / 24°196.911.97.8
Apr26° / 25°298.312.37.2
May27° / 25°4410.212.76.7
Jun27° / 26°4710.512.96.4
Jul27° / 26°7616.412.85.8
Aug28° / 26°9918.412.55.4
Sep28° / 26°11317.112.15.3
Oct28° / 26°11819.111.75.2
Nov27° / 26°10117.111.35.7
Dec26° / 25°4814.211.16.4

Cloud cover in July

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 53% of the time in July.

Beyond those clear spells, partly cloudy skies cover about 15% of July, with mostly cloudy or overcast conditions the remaining 32%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
16040
26139
36238
46238
56337
66436
76436
86535
96634
106733
116733
126832
136832
146832
156931
166931
177030
187129
197129
207228
217228
227228
237228
247129
257129
267129
277129
287129
297030
307030
317030

Chance of precipitation in July

Any precipitation

Roseau gets around 76 mm of rain over 16.4 wet days in July. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 52% and peaks near 60% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
142
243
344
444
545
646
747
847
948
1048
1149
1249
1350
1450
1551
1652
1752
1853
1954
2054
2155
2256
2357
2457
2558
2658
2758
2859
2959
3060
3160

Humidity in July

DryComfortableHumidMuggyOppressiveMiserable

Most of July feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, July lands in the oppressive band about 88% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202531
Oppressive (%)Miserable (%)
19010
29010
39010
49010
59010
69010
79010
8919
9919
10919
11919
12919
13919
149010
159010
169010
179010
188911
198911
208812
218713
228713
238614
248515
258416
268416
278317
288218
298119
308119
318020

Wind in July

Winds average 29 km/h in July.

Across July, daily wind ranges from about 28 km/h on the calmest days to 30 km/h at its breeziest. It stays fairly steady from day to day.

0102030151015202531
Wind speed (km/h)Feels
130windy
230windy
330windy
430windy
530windy
630windy
730windy
830windy
930windy
1030windy
1129windy
1229windy
1329windy
1429windy
1529windy
1629breezy
1729breezy
1829breezy
1929breezy
2029breezy
2129breezy
2228breezy
2328breezy
2428breezy
2528breezy
2628breezy
2728breezy
2828breezy
2928breezy
3028breezy
3128breezy

Sunrise & sunset in July

DaylightNight

Daylight runs from about 12 h 54 min at the start of July to 12 h 42 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 12 minutes over July. Sunrise moves from 5:42 AM to 5:51 AM, and sunset from 6:36 PM to 6:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
112.95:426:36
212.95:426:36
312.95:436:36
412.95:436:36
512.95:436:36
612.95:436:36
712.95:446:36
812.95:446:36
912.95:446:36
1012.95:456:36
1112.95:456:36
1212.95:456:36
1312.85:456:36
1412.85:466:36
1512.85:466:36
1612.85:466:36
1712.85:476:36
1812.85:476:36
1912.85:476:36
2012.85:486:35
2112.85:486:35
2212.85:486:35
2312.85:486:35
2412.85:496:35
2512.85:496:34
2612.75:496:34
2712.75:506:34
2812.75:506:34
2912.75:506:33
3012.75:506:33
3112.75:516:33

Solar energy in July

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in July, about 6.45 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 — July's 6.45 kWh/m² falls in the middle.

0246151015202531
Solar energy (kWh/m²)Level
16.5Intense
26.5Intense
36.5Intense
46.5Intense
56.5Intense
66.5Intense
76.5Intense
86.5Intense
96.5Intense
106.5Intense
116.5Intense
126.5Intense
136.5Intense
146.5Intense
156.5Intense
166.5Intense
176.5Intense
186.5Intense
196.5Intense
206.5Intense
216.5Intense
226.5Intense
236.4Intense
246.4Intense
256.4Intense
266.4Intense
276.4Intense
286.4Intense
296.4Intense
306.4Intense
316.4Intense
Planning a trip in July

Hazard calendar for Roseau

In seasonPeak

In July, Roseau sits inside its atlantic hurricane, rainy season and dust 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.

Atlantic hurricane
Rainy season
Dust
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is July a good time to visit Roseau?

Our two travel scores rate July for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

5.8
Sightseeing
8th-best month of the year
6.0
Beach & pool
8th-best month of the year

July is a reasonable time to visit Roseau for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Roseau in July

From July's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In July, Roseau sees daytime highs around 27°C and nights near 26°C. Pack light clothes, rain gear, sun protection and a windbreaker. About 16 days see rain.

light clothesrain gearsun protectiona windbreaker

Sea temperature near Roseau in July

The nearest coast averages about 28°C in July — 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.

26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr27Warm
May28Warm
Jun28Warm
Jul28Tropical
Aug29Tropical
Sep29Tropical
Oct29Tropical
Nov29Tropical
Dec28Warm

UV index in Roseau in July

LowModerateHighVery highExtreme

Clear-sky midday UV in July peaks around 12 (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.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highMar 21UV 13Dec 13UV 8
UV index (midday)Level
Jan9Very high
Feb11Extreme
Mar14Extreme
Apr13Extreme
May12Extreme
Jun11Extreme
Jul12Extreme
Aug11Extreme
Sep12Extreme
Oct11Extreme
Nov8Very high
Dec8Very high

Air quality in Roseau in July

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where July 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).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodModerateGoodJun 2028 µg/m³Dec 239 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb13Moderate
Mar11Good
Apr15Moderate
May18Moderate
Jun28Moderate
Jul26Moderate
Aug21Moderate
Sep16Moderate
Oct18Moderate
Nov12Moderate
Dec9Good
Location & terrain

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.

3 km
417 m
16 km
1,383 m
80 km
1,389 m
treesartificial surfaceswater
July weather nearby: Sainte-Marie 72 km · La Trinité 78 km · Saint-Joseph 80 km · Le Robert 84 km · Fort-de-France 85 km · Capesterre-Belle-Eau 85 km · Basse-Terre 86 km · Le Lamentin 87 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
Roman Catholic 53%Protestant 30%none 9%other 4%

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).