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Climate in Black River
(Mauritius)

Average daytime and nighttime temperatures


All climatic diagrams on this site result from the collected data from 2 measuring stations in Black River.
All data correspond to the average monthly values of the last 20 years.


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Black River is one of the coldest regions in Mauritius with an average daily high temperature of only 27 degrees centigrade. The climate is very warm with an annual average of 27 degrees, but has few truly tropical and sultry months. It is warm to hot all year round and invites to bathe at average water temperatures of 25 degrees. Dued to the lesser rain the best time for traveling is from October to November. Most precipitation decrease from January to March.
Overview: Climate in Mauritius
Daylengths and sun positions in Mauritius
Compare climate with other regions or countries
Hours of sunshine per daySunshine hours per day in Black River
The number of hours of sunshine refers to the time when the sun is actually visible. That is, without any obstruction of visibility by clouds, fog or mountains. With 8 hours per day, December is the sunniest month in country part Black River. In July the sun shines the shortest.
Rainy days per monthRainy days per month in Black River
A rainy day is a day on which at least an amount of 0.1 mm precipitation (=0.1 liter) per square meter falls. This can be rain, snow, hail or even dew. So it does not have to rain the whole day. With 18 rainy days, March offers the most number of rainy days, and in November the least.
Precipitation in mm/dayPrecipitation in Black River
The amount of precipitation is measured in millimeters per square meter. Thus, at 2 mm/day, 2 liters of water fall on one square meter within 24 hours. With only 1.9 mm, the least rain falls in October. February, on the other hand, has the most rain.
Water temperatureWater temperatures in Black River
Water temperature depends not only on solar radiation within the same region, but also on ocean currents. For example, depending on the season, cold or warm water masses are moved from other areas. The warmest temperatures in Black River are in January, when the water is 27 °C.
Relative humidity in %Relative humidity in Black River
Warm air can absorb more moisture than cold air. The relative humidity indicates how much moisture of the physically possible is actually contained in the air. At high humidity, the person feels uncomfortable and perceives this as oppressive. In general, a relative humidity of 40-60% gives as pleasant. With humidity averaging 85%, February is the most uncomfortable. In September, on the other hand, it is easier to endure.
Absolute humidity in g/m³Absolute humidity in Black River
In warm months, there is also a higher absolute humidity almost everywhere. At a temperature of 25°C, air can absorb up to 23 grams of water per cubic meter. At 20°C, it is only 17.3 grams. A relative humidity of 40% at 25°C thus corresponds to an absolute humidity of 9.2 grams of water. From a proportion of approx. 13.5 grams, humans perceive the air as muggy. This limit is exceeded throughout the year in Black River.
Humidex in °CHumidex in Black River
The "Humidex" (humidity index) is an index of well-being in warmer areas, calculated from the air temperature, relative humidity and dew point. The index corresponds approximately to the temperature felt. At high temperatures, the body transports heat away by sweating. At high humidity the ambient air can only absorb a small amount of sweat and thus one feels uncomfortable. An index of 20-29 is considered comfortable. Up to 39, people perceive the air as slightly uncomfortable, and above 40, as very uncomfortable. Values above 45 are dangerous in the long run and often lead to heat stroke.
Map of Black River

Most important cities in the country part »Black River«

Only very small villages are located here. The two biggest are Petite Rivière and Tamarin.

CityPopulationGeo-Position
Petite Rivière5,33120° 11' 44"S57° 26' 45"E
Tamarin3,76420° 19' 32"S57° 22' 14"E
Gros Cailloux3,36120° 12' 26"S57° 25' 48"E
Albion3,25420° 12' 42"S57° 24' 3"E
Cascavelle2,61320° 17' 13"S57° 24' 26"E
Grande Rivière Noire2,36120° 21' 37"S57° 21' 58"E
Flic en Flac2,01020° 16' 27"S57° 21' 47"E
Petite Case Noyale1,52520° 23' 35"S57° 21' 54"E


Data basis: German Weather Service, individual values averaged and supplemented by own elements. Data on cities and inhabitants: geonames.org, United Nations Statistics Division and own research.
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