Roseau weather in January

In January, Roseau sees average daytime highs of 26°C and overnight lows near 24°C, with 32 mm of rain across 12 wet days and about 11.2 hours of daylight. It is the 10th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 84% of the time in January, and the air most often feels muggy.

Daylight stretches from about 11 h 06 min at the start of January to 11 h 18 min by month's end. Set against the rest of the year, January is Roseau's 2nd-clearest and 1st-windiest month. For the whole year in context, see Roseau's year-round climate.

Daytime high
26°
10th warmest
Overnight low
24°
3rd coldest
Rainfall
32 mm
12 wet days
Daylight
11 h 12 min
6:39 AM – 5:50 PM
Cloud cover
28%
2nd clearest
Wind
30 km/h
1st windiest
Solar energy
5.08 kWh/m²
Travel score
7.1
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 January

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 26°C through the month.

A typical January day in Roseau reaches about 26°C in the afternoon and slips back to 24°C overnight — a 1°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 26°C. Set against its neighbours, January runs on par with December and on par with February.

20°23°25°28°30°151015202531
Avg high (°C)Avg low (°C)
12625
22625
32625
42625
52625
62625
72625
82624
92624
102624
112624
122624
132624
142624
152624
162624
172624
182624
192624
202524
212524
222524
232524
242524
252524
262524
272524
282524
292524
302524
312524

Roseau weather by month

How January compares with the rest of the year at a glance. January is the 10th-warmest and 9th-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 January

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 84% of the time in January.

Beyond those clear spells, partly cloudy skies cover about 9% of January, with mostly cloudy or overcast conditions the remaining 8%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
18911
28911
38911
49010
59010
6919
7919
8919
9919
10919
11919
12919
13928
14928
15937
16937
17937
18946
19946
20946
21946
22955
23955
24955
25946
26946
27946
28946
29937
30937
31928

Chance of precipitation in January

Any precipitation

Roseau gets around 32 mm of rain over 12 wet days in January. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 39% and peaks near 49% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%151015202531
Rain chance (%)
149
249
349
449
548
648
747
847
946
1045
1144
1243
1342
1441
1540
1639
1738
1837
1935
2034
2133
2232
2331
2430
2529
2629
2728
2828
2928
3028
3128

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the muggy band about 50% of days. Sticky, muggy-or-worse air turns up on roughly 98% of them.

0%25%50%75%100%151015202531
Humid (%)Muggy (%)Oppressive (%)
113267
213366
313564
413663
513861
613960
714059
814257
914356
1014455
1114554
1214653
1314752
1414851
1524950
1624949
1725048
1825147
1925246
2025345
2125543
2225741
2335740
2435938
2536136
2646234
2746333
2846531
2956530
3056629
3156629

Wind in January

Winds average 30 km/h in January, the windiest month of the year.

Across January, daily wind ranges from about 29 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
1130windy
1230windy
1330windy
1430windy
1529windy
1629windy
1729windy
1829windy
1929windy
2029windy
2129windy
2229windy
2329windy
2429windy
2529windy
2629windy
2729windy
2829windy
2929windy
3029windy
3129windy

Sunrise & sunset in January

DaylightNight

Daylight runs from about 11 h 06 min at the start of January to 11 h 18 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 12 minutes over January. Sunrise moves from 6:36 AM to 6:39 AM, and sunset from 5:42 PM to 5:58 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.16:365:42
211.16:365:42
311.16:365:43
411.16:375:44
511.16:375:44
611.16:375:45
711.16:375:45
811.16:385:46
911.16:385:46
1011.16:385:47
1111.26:385:48
1211.26:395:48
1311.26:395:49
1411.26:395:49
1511.26:395:50
1611.26:395:50
1711.26:395:51
1811.26:405:51
1911.26:405:52
2011.26:405:53
2111.26:405:53
2211.26:405:54
2311.26:405:54
2411.26:405:55
2511.36:405:55
2611.36:405:56
2711.36:405:56
2811.36:405:57
2911.36:405:57
3011.36:405:58
3111.36:395:58

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 5.08 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 — January's 5.08 kWh/m² sits near the bottom.

0246151015202531
Solar energy (kWh/m²)Level
14.9Bright
24.9Bright
34.9Bright
44.9Bright
54.9Bright
64.9Bright
74.9Bright
84.9Bright
94.9Bright
105.0Bright
115.0Bright
125.0Bright
135.0Bright
145.0Bright
155.0Bright
165.1Bright
175.1Bright
185.1Bright
195.1Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.4Bright
305.4Bright
315.4Bright
Planning a trip in January

Hazard calendar for Roseau

In seasonPeak

None of Roseau's seasonal hazards are active in January. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

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 January a good time to visit Roseau?

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

7.1
Sightseeing
4th-best month of the year
6.6
Beach & pool
5th-best month of the year

January is one of the better times to visit Roseau for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Roseau in January

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

In January, Roseau sees daytime highs around 26°C and nights near 24°C. Pack a windbreaker. Worth having: light clothes, rain gear and sun protection. About 12 days see rain.

a windbreakerlight clothesrain gearsun protection

Sea temperature near Roseau in January

The nearest coast averages about 27°C in January — 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 January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 9 (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 January

GoodModeratePoorUnhealthyVery unhealthy

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