January weather forecast
Stone Town, Tanzania

January, the same as December, is a moderately hot summer month in Stone Town, Tanzania, with an average temperature ranging between max 29.4°C (84.9°F) and min 27°C (80.6°F).

Temperature

In January, the average high-temperature remains the same as in December - a still warm 29.4°C (84.9°F). In Stone Town, in January, the average low-temperature is 27°C (80.6°F).

Heat index

In January, the average heat index is appraised at a very hot 35°C (95°F). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.
Take into consideration that the heat index values are calculated for shade and light wind conditions. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel', 'felt air temperature', 'feels like', or 'apparent temperature', is an index that combines air temperature and relative humidity to determine the human-perceived temperature equivalent. This effect is individual, with diverse people perceiving weather differently for numerous reasons (metabolic differences, differences in body mass, height, and shape, wind), and activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it is vital to remain hydrated, particularly during prolonged physical activities.
Perspiration is the human body's physiological response to high temperatures and is an attempt to lower body temperature through evaporation of sweat. High relative humidity reduces the evaporation rate, resulting in a lower heat removal rate from the body, causing the perception of being overheated. If the body can not disperse the excessive heat and body temperature reaches conditions of hyperthermia, above 37.5°C (99.5°F) to 38.3°C (100.9°F), thermal conditions are potentially life-threatening.

Humidity

The months with the highest humidity are January, April, May and November, with an average relative humidity of 78%.

Rainfall

In Stone Town, during January, the rain falls for 16.6 days and regularly aggregates up to 56mm (2.2") of precipitation. Throughout the year, in Stone Town, there are 255.1 rainfall days, and 1172mm (46.14") of precipitation is accumulated.

Daylight

In Stone Town, the average length of the day in January is 12h and 26min.
On the first day of January, sunrise is at 06:12 and sunset at 18:40. On the last day of the month, sunrise is at 06:25 and sunset at 18:47 EAT.

Sunshine

The average sunshine in January in Stone Town is 8.5h.

UV index

The months with the highest UV index in Stone Town are January through March, October through December, with an average maximum UV index of 7. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 7 in January interpret into the following advice:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. The Sun's UV radiation is most powerful between 10 a.m. and 4 p.m. To the extent possible, limit exposure to the direct sun during these hours. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.