January weather forecast
Dar es Salaam, Tanzania

The start of the year sees temperatures in Dar es Salaam reaching 30.5°C (86.9°F) on the higher end, with humidity hovering around 78%. The coastal city experiences quite a breezy weather with wind speeds averaging 14.2km/h (8.8mph). Due to its proximity to the equator, Daylight hours do not vary significantly, providing approximately 12.5 hours, complimented by 8.1 hours of sunshine. The frequency of rainfall is notable, attributing to the lush green landscapes that are synonymous with this Tanzanian metropolis.

Temperature

The advent of January observes an average high-temperature of a still tropical 30.5°C (86.9°F), nearly identical to December's 30.8°C (87.4°F). Dar es Salaam, during January nights, observes an average temperature of 25.3°C (77.5°F).

Heat index

The heat index value during January is estimated at a fiery hot 39°C (102.2°F). Adopt extra safety steps, risk of heat exhaustion and heat cramps is notable. Sustained activity might cause heatstroke.
It is crucial to understand that heat index figures are for shade and gentle wind conditions. Exposure to the sun directly might heighten the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is the result of factoring in humidity to the air temperature, indicating perceived warmth. The impact of weather on an individual can be subjective, affected by the person's activity and heat perception, which can vary due to elements including wind, clothing, and metabolic differences. By being directly under the sun, it's possible for the felt temperature to increase by 15 Fahrenheit (8 Celsius) degrees. Heat index values are largely significant for babies and toddlers. Kids are usually in more danger than grown-ups as they tend to sweat less. Plus, their bigger skin surface in relation to their small frames and increased heat generation due to their activity level make them more susceptible.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. When there is abundant moisture in the air, the body's cooling through the evaporation process becomes less effective, leading to the sensation of overheating. Temperature imbalances caused by excessive heat retention can trigger heat-related maladies.

Humidity

In January, the average relative humidity is 78%.

Rainfall

In Dar es Salaam, during January, the rain falls for 20.3 days and regularly aggregates up to 49mm (1.93") of precipitation. Throughout the year, there are 255.3 rainfall days, and 734mm (28.9") of precipitation is accumulated.

Sea temperature

In January, the average sea temperature is 28.5°C (83.3°F).
Note: Water temperature between 25°C (77°F) and 29°C (84.2°F) is perceived as agreeably warm, making all water activities enjoyable without the risk of discomfort over lengthy durations.

Daylight

The average length of the day in January is 12h and 28min.
On the first day of the month, sunrise is at 06:11 and sunset at 18:41. On the last day of January, sunrise is at 06:24 and sunset at 18:48 EAT.

Sunshine

In January, the average sunshine is 8.1h.

UV index

The months with the highest UV index are January through March and December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health vulnerability from unsafe exposure to UV radiation for average individuals.
Note: In January, the maximum UV index of 7 transforms into these recommendations:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Take note! The UV strength of the Sun elevates when reflected off water and sand.