Rosso weather in December

In December, Rosso sees average daytime highs of 33°C and overnight lows near 20°C, with 2 mm of rain across 0.3 wet days and about 11 hours of daylight. It is the 11th-warmest and 6th-wettest month of the year here.

Highs ease over the month, from about 33°C in the first days to 32°C by the end. The sky is clear or mostly clear about 48% of the time in December, and the air most often feels dry.

Daylight stretches from about 11 h 06 min at the start of December to 11 hours by month's end. Set against the rest of the year, December is Rosso's 9th-clearest and 8th-windiest month. For the whole year in context, see Rosso's year-round climate.

Daytime high
33°
11th warmest
Overnight low
20°
3rd coldest
Rainfall
2 mm
0.3 wet days
Daylight
11 hours
7:29 AM – 6:30 PM
Cloud cover
46%
9th clearest
Wind
16 km/h
8th windiest
Solar energy
4.99 kWh/m²
Travel score
4.6
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 December

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 33°C in the first days to 32°C by the end.

A typical December day in Rosso reaches about 33°C in the afternoon and slips back to 20°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 36°C. Set against its neighbours, December runs about 3°C cooler than November and about 1°C warmer than January.

15°20°25°30°35°40°151015202531
Avg high (°C)Avg low (°C)
13421
23421
33421
43320
53320
63320
73320
83320
93320
103320
113320
123320
133320
143320
153320
163319
173219
183219
193219
203219
213219
223219
233219
243219
253219
263219
273219
283219
293219
303219
313219

How December really feels in Rosso

Once humidity and wind are folded in, December averages 27 days 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
27
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

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

Rosso weather by month

How December compares with the rest of the year at a glance. December is the 11th-warmest and 6th-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 December

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 48% of the time in December.

Beyond those clear spells, partly cloudy skies cover about 11% of December, with mostly cloudy or overcast conditions the remaining 42%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
15842
25842
35842
45842
55842
65842
75842
85842
95941
105941
115842
125842
135842
145941
155941
165941
175941
185941
195941
205941
215941
225941
235941
245842
255842
265842
275842
285842
295941
305941
315941

Chance of precipitation in December

Any precipitation

Rosso gets around 2 mm of rain over 0.3 wet days in December. 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 2% on the wettest days.

0%10%20%30%151015202531
Rain chance (%)
11
21
31
41
51
62
72
82
92
102
112
121
131
141
151
161
171
181
191
201
210
220
230
240
250
260
270
280
290
301
311

Humidity in December

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, December lands in the dry band about 89% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202531
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1821152
2831052
3831052
484952
584952
685942
786842
886842
986842
1086842
1187742
1287742
1387742
1487742
1587742
1687742
1788732
1889731
1990631
2090631
2190631
2292521
2392521
2493421
2593421
2694420
2795320
2895320
2995320
3096220
3197210

Wind in December

Winds average 16 km/h in December.

Across December, daily wind ranges from about 16 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
616light breeze
716light breeze
816light breeze
916light breeze
1016light breeze
1116light breeze
1216light breeze
1316light breeze
1416light breeze
1516light breeze
1616light breeze
1716light breeze
1816light breeze
1916light breeze
2016light breeze
2116light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze
3117light breeze

Sunrise & sunset in December

DaylightNight

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

Days shrink by about 6 minutes over December. Sunrise moves from 7:20 AM to 7:36 AM, and sunset from 6:26 PM to 6:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
111.17:206:26
211.17:216:26
311.17:226:26
411.17:226:26
511.17:236:26
611.17:236:27
711.17:246:27
811.07:246:27
911.07:256:28
1011.07:266:28
1111.07:266:28
1211.07:276:29
1311.07:276:29
1411.07:286:29
1511.07:286:30
1611.07:296:30
1711.07:296:30
1811.07:306:31
1911.07:306:31
2011.07:316:32
2111.07:316:32
2211.07:326:33
2311.07:326:33
2411.07:336:34
2511.07:336:34
2611.07:346:35
2711.07:346:35
2811.07:346:36
2911.07:356:36
3011.07:356:37
3111.07:366:37

Solar energy in December

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in December, about 4.99 kWh/m² — the year's lowest.

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 — December's 4.99 kWh/m² sits near the bottom.

0246151015202531
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.1Bright
55.0Bright
65.0Bright
75.0Bright
85.0Bright
95.0Bright
105.0Bright
115.0Bright
125.0Bright
135.0Bright
145.0Bright
155.0Bright
165.0Bright
175.0Bright
185.0Bright
195.0Bright
205.0Bright
215.0Bright
225.0Bright
235.0Bright
245.0Bright
255.0Bright
265.0Bright
275.0Bright
285.0Bright
295.0Bright
305.0Bright
315.0Bright
Planning a trip in December

Hazard calendar for Rosso

In seasonPeak

In December, 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 December a good time to visit Rosso?

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

4.6
Sightseeing
2nd-best month of the year
7.8
Beach & pool
3rd-best month of the year

December 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 December

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

In December, Rosso sees daytime highs around 33°C and nights near 20°C. Pack light clothes. Worth having: sun protection.

light clothessun protection

UV index in Rosso in December

LowModerateHighVery highExtreme

Clear-sky midday UV in December peaks around 7 — enough to warrant sun protection. 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 December

GoodModeratePoorUnhealthyVery unhealthy

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