Rosso weather in January

In January, Rosso sees average daytime highs of 31°C and overnight lows near 18°C, with 4 mm of rain across 0.3 wet days and about 11.1 hours of daylight. It is the 12th-warmest and 5th-wettest month of the year here.

Day-to-day highs hold fairly steady near 31°C through the month. The sky is clear or mostly clear about 53% of the time in January, and the air most often feels dry.

Daylight stretches from about 11 hours at the start of January to 11 h 18 min by month's end. Set against the rest of the year, January is Rosso's 8th-clearest and 6th-windiest month. For the whole year in context, see Rosso's year-round climate.

Daytime high
31°
12th warmest
Overnight low
18°
1st coldest
Rainfall
4 mm
0.3 wet days
Daylight
11 h 06 min
7:39 AM – 6:46 PM
Cloud cover
40%
8th clearest
Wind
17 km/h
6th windiest
Solar energy
5.3 kWh/m²
Travel score
5.5
out of 10

Rosso is commune of Mauritania.

Density
22/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 31°C through the month.

A typical January day in Rosso reaches about 31°C in the afternoon and slips back to 18°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 35°C. Set against its neighbours, January runs about 1°C cooler than December and about 2°C cooler than February.

10°20°30°40°151015202531
Avg high (°C)Avg low (°C)
13219
23218
33218
43118
53118
63118
73118
83118
93118
103118
113118
123118
133118
143118
153118
163118
173118
183118
193118
203118
213118
223118
233118
243118
253218
263218
273218
283218
293218
303219
313219

How January really feels in Rosso

Once humidity and wind are folded in, January averages 1 day that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
1
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in January is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Rosso weather by month

How January compares with the rest of the year at a glance. January is the 12th-warmest and 5th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 18°40.311.15.5
Feb33° / 19°20.311.44.5
Mar35° / 21°00.111.93.0
Apr37° / 21°0012.41.9
May39° / 23°00.112.81.0
Jun38° / 24°20.3131.4
Jul36° / 25°122.312.92.7
Aug35° / 26°597.512.62.8
Sep36° / 26°558.312.12.3
Oct38° / 25°162.911.61.4
Nov36° / 23°10.211.22.6
Dec33° / 20°20.3114.6

Cloud cover in January

ClearMostly clearPartly cloudyMostly cloudyOvercast

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

Beyond those clear spells, partly cloudy skies cover about 10% of January, with mostly cloudy or overcast conditions the remaining 37%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15941
25941
35842
45941
55941
66040
76040
86139
96139
106139
116337
126337
136337
146337
156337
166436
176436
186436
196535
206535
216535
226634
236634
246634
256634
266733
276733
286733
296733
306733
316832

Chance of precipitation in January

Any precipitation

Rosso gets around 4 mm of rain over 0.3 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 1% and peaks near 1% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
11
21
31
41
51
61
71
81
91
101
111
121
131
141
151
161
171
181
191
201
210
220
230
240
250
260
270
280
290
300
310

Humidity in January

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, January lands in the dry band about 95% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)
19721
29721
39721
49721
59721
69721
79622
89622
99721
109631
119631
129631
139631
149631
159631
169631
179631
189631
199631
209541
219541
229541
239541
249451
259451
269352
279262
289262
299262
309262
319262

Wind in January

Winds average 17 km/h in January.

Across January, daily wind ranges from about 17 km/h on the calmest days to 18 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
117light breeze
217light breeze
317light breeze
417light breeze
517light breeze
617light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2518light breeze
2618light breeze
2718light breeze
2818light breeze
2918light breeze
3018light breeze
3118light breeze

Sunrise & sunset in January

DaylightNight

Daylight runs from about 11 hours 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 18 minutes over January. Sunrise moves from 7:35 AM to 7:39 AM, and sunset from 6:37 PM to 6:54 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.07:356:37
211.07:366:38
311.07:366:38
411.07:366:39
511.07:376:40
611.17:376:40
711.17:376:41
811.17:386:41
911.17:386:42
1011.17:386:42
1111.17:386:43
1211.17:386:44
1311.17:396:44
1411.17:396:45
1511.17:396:45
1611.17:396:46
1711.17:396:47
1811.17:396:47
1911.17:396:48
2011.17:396:48
2111.27:396:49
2211.27:396:49
2311.27:396:50
2411.27:396:51
2511.27:396:51
2611.27:396:52
2711.27:396:52
2811.27:396:53
2911.27:396:53
3011.27:396:54
3111.37:396:54

Solar energy in January

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in January, about 5.3 kWh/m².

For context, solar energy here swings from a low near 4.99 kWh/m² to a high of 7.46 kWh/m² in May across the year — January's 5.3 kWh/m² sits near the bottom.

0246151015202531
Solar energy (kWh/m²)Level
15.0Bright
25.1Bright
35.1Bright
45.1Bright
55.1Bright
65.1Bright
75.1Bright
85.1Bright
95.2Bright
105.2Bright
115.2Bright
125.2Bright
135.2Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.4Bright
205.4Bright
215.4Bright
225.4Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.6Bright
305.6Bright
315.6Bright
Planning a trip in January

Hazard calendar for Rosso

In seasonPeak

In January, Rosso sits inside its dust season. The full year is below, with each hazard's peak months called out.

Rosso sees dust haze year-round, heaviest in June.

Dust
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is January a good time to visit Rosso?

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

5.5
Sightseeing
1st-best month of the year
8.3
Beach & pool
1st-best month of the year

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

What to pack for Rosso in January

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

In January, Rosso sees daytime highs around 31°C and nights near 18°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

UV index in Rosso in January

LowModerateHighVery highExtreme

Clear-sky midday UV in January peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Rosso peaks around March 18 at about 12 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 15 at about 7 (very high).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecVery highExtremeVery highExtremeVery highMar 18UV 12Dec 15UV 7
UV index (midday)Level
Jan8Very high
Feb11Extreme
Mar13Extreme
Apr11Extreme
May12Extreme
Jun10Very high
Jul10Very high
Aug11Extreme
Sep11Extreme
Oct9Very high
Nov8Very high
Dec7High

Air quality in Rosso 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 Rosso is worst in January — around 115 µg/m³ PM2.5 (unhealthy), about 3.7× the cleanest month (August, 31 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0306090120JanFebMarAprMayJunJulAugSepOctNovDecUnhealthyPoorPoorUnhealthyJan 24115 µg/m³Aug 1932 µg/m³
PM2.5 (µg/m³)Level
Jan115Unhealthy
Feb115Unhealthy
Mar85Unhealthy
Apr73Unhealthy
May73Unhealthy
Jun83Unhealthy
Jul46Poor
Aug31Moderate
Sep38Poor
Oct59Unhealthy
Nov62Unhealthy
Dec105Unhealthy
Location & terrain

Where is Rosso?

Rosso sits at 16.5°N, 15.8°W, 8 m above sea level, in Mauritania. The nearest listed city is Richard-Toll, 12 km away.

PodorSaint-LouisLougaNdioumDara

Topography around Rosso

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Rosso.

Within 3 km, the terrain around Rosso has only modest variations in elevation — a maximum elevation change of 6 m around an average of 2 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 35 m; within 80 km, only modest variations in elevation — a maximum elevation change of 68 m.

The land around Rosso is covered by grassland (30%) and cropland (29%) within 3 km, cropland (38%) and grassland (30%) within 16 km, and grassland (70%) within 80 km.

3 km
6 m
16 km
35 m
80 km
68 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwaterwetland
January weather nearby: Richard-Toll 12 km · Dagana 22 km · Tékane 50 km · Podor 91 km · Saint-Louis 92 km · Louga 109 km · Ndioum 123 km · Dara 134 km

Mauritania travel facts

Travel advisory
Level 3
Reconsider Travel
Power plugs
Type C / E / F
220 V · 50 Hz
Prices
≈ 31% of US
price level, 2025
GDP per capita
$2,198
2025
Happiness
4.5 / 10
World Happiness, 2025
Homicide rate
1
per 100k, 2020
Road deaths
25.6
per 100k/yr, 2019
Income group
Lower middle
World Bank
Religion
Muslim 100%

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 Rosso (16.5138°, -15.805°, elevation 8 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. 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).