Winter Weather in Nouadhibou Mauritania

Daily high temperatures are around 77°F, rarely falling below 70°F or exceeding 87°F. The lowest daily average high temperature is 75°F on January 13.

Daily low temperatures are around 61°F, rarely falling below 56°F or exceeding 68°F. The lowest daily average low temperature is 60°F on January 22.

For reference, on September 21, the hottest day of the year, temperatures in Nouadhibou typically range from 71°F to 86°F, while on January 20, the coldest day of the year, they range from 60°F to 75°F.

The figure below shows you a compact characterization of the hourly average winter temperatures. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Pukalani, Hawaii, United States (8,461 miles away); Chepén, Peru (4,661 miles); and Acarí, Peru (4,647 miles) are the far-away foreign places with temperatures most similar to Nouadhibou (view comparison).

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The winter in Nouadhibou experiences very rapidly decreasing cloud cover, with the percentage of time that the sky is overcast or mostly cloudy decreasing from 42% to 24%.

The clearest day of the winter is February 26, with clear, mostly clear, or partly cloudy conditions 77% of the time.

For reference, on November 24, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 45%, while on June 30, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 94%.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Nouadhibou, the chance of a wet day over the course of the winter is essentially constant, remaining around 1% throughout.

For reference, the year's highest daily chance of a wet day is 3% on September 4, and its lowest chance is 0% on May 23.

Rainfall

To show variation within the season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the winter in Nouadhibou is essentially constant, remaining about 0.1 inches throughout, and rarely exceeding 0.3 inches.

Over the course of the winter in Nouadhibou, the length of the day is increasing. From the start to the end of the season, the length of the day increases by 45 minutes, implying an average daily increase of 31 seconds, and weekly increase of 3 minutes, 34 seconds.

The shortest day of the winter is December 21, with 10 hours, 52 minutes of daylight and the longest day is February 28, with 11 hours, 43 minutes of daylight.

The earliest sunrise of the winter in Nouadhibou is 7:28 AM on December 1 and the latest sunrise is 19 minutes later at 7:47 AM on January 17.

The earliest sunset is 6:25 PM on December 1 and the latest sunset is 46 minutes later at 7:12 PM on February 28.

Daylight saving time is not observed in Nouadhibou during 2026.

For reference, on June 21, the longest day of the year, the Sun rises at 6:27 AM and sets 13 hours, 24 minutes later, at 7:52 PM, while on December 21, the shortest day of the year, it rises at 7:40 AM and sets 10 hours, 52 minutes later, at 6:32 PM.

The figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

The figure below presents a compact representation of key lunar data for the winter of 2026. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The chance that a given day will be muggy in Nouadhibou is gradually decreasing during the winter, falling from 6% to 2% over the course of the season.

The lowest chance of a muggy day during the winter is 1% on January 13.

For reference, on August 21, the muggiest day of the year, there are muggy conditions 83% of the time, while on January 12, the least muggy day of the year, there are muggy conditions 1% of the time.

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Nouadhibou is increasing during the winter, increasing from 11.9 miles per hour to 13.6 miles per hour over the course of the season.

For reference, on June 7, the windiest day of the year, the daily average wind speed is 17.5 miles per hour, while on December 4, the calmest day of the year, the daily average wind speed is 11.8 miles per hour.

The lowest daily average wind speed during the winter is 11.8 miles per hour on December 6.

The wind direction in Nouadhibou during the winter is predominantly out of the north from December 1 to December 23 and from January 6 to February 28 and the east from December 23 to January 6.

Nouadhibou is located near a large body of water (e.g., ocean, sea, or large lake). This section reports on the wide-area average surface temperature of that water.

The average surface water temperature in Nouadhibou is gradually decreasing during the winter, falling by 3°F, from 67°F to 65°F, over the course of the season.

The lowest average surface water temperature during the winter is 64°F on February 3.

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

Temperatures in Nouadhibou are sufficiently warm year round that it is not entirely meaningful to discuss the growing season in these terms. We nevertheless include the chart below as an illustration of the distribution of temperatures experienced throughout the year.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

The average accumulated growing degree days in Nouadhibou are very rapidly decreasing during the winter, decreasing by 5,975°F, from 6,923°F to 948°F, over the course of the season.

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy in Nouadhibou is rapidly increasing during the winter, rising by 1.7 kWh, from 4.6 kWh to 6.2 kWh, over the course of the season.

The lowest average daily incident shortwave solar energy during the winter is 4.4 kWh on December 21.

For the purposes of this report, the geographical coordinates of Nouadhibou are 20.942 deg latitude, -17.038 deg longitude, and 52 ft elevation.

The topography within 2 miles of Nouadhibou is essentially flat, with a maximum elevation change of 92 feet and an average elevation above sea level of 20 feet. Within 10 miles is essentially flat (207 feet). Within 50 miles also contains only modest variations in elevation (354 feet).

The area within 2 miles of Nouadhibou is covered by artificial surfaces (49%) and bare soil (44%), within 10 miles by water (78%) and bare soil (20%), and within 50 miles by water (69%) and bare soil (31%).