May weather forecast
Stone Town, Tanzania

The month of May ushers in a period of cooler nights in Stone Town, with a transition to increasingly comfortable temperatures, hence a break from the constant heat. This town experiences a significant drop in rain levels from 296mm (11.65") in April to 217mm (8.54"). As we move away from the heavy rainfall period, drier days become more frequent, and wind speeds increase. Relative to the preceding months, May marks the initiation of the dry season, preceding the driest period in June and July. With a gradual decrease in cloud cover, conditions trend towards typical dry-season weather patterns, rendering this month as the commencement of a drier period.

Temperature

With the onset of May, the average high-temperature in Stone Town stands at a still moderately hot 28.2°C (82.8°F), closely aligned with April's 29.1°C (84.4°F). The low temperature average during May reflects a slight decrease to a still warm 25.3°C (77.5°F) from the day's peak.

Heat index

May's heat index is estimated at a hot 32°C (89.6°F). Exhaustion becomes probable with enduring exposure and activity, potentially causing heat cramps.
Evaluating the heat index requires understanding its values in the shade and with gentle winds. Exposure to direct sunshine can increase heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', is an estimation of the warmth sensation when considering humidity levels. This effect is subjective, differing among individuals based on their physical activity and perception of heat, which can be influenced by factors like wind, clothing, and metabolic variances. Sunshine, when direct, has the potential to intensify weather effects, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.

Humidity

January, April, May and November, with an average relative humidity of 78%, are the most humid months in Stone Town.

Rainfall

In May, the rain falls for 25.6 days. Throughout May, 217mm (8.54") of precipitation is accumulated. Throughout the year, there are 255.1 rainfall days, and 1172mm (46.14") of precipitation is accumulated.

Daylight

The average length of the day in May is 11h and 50min.
On the first day of the month, sunrise is at 06:23 and sunset at 18:17. On the last day of May, sunrise is at 06:27 and sunset at 18:14 EAT.

Sunshine

May has the least sunshine of the year in Stone Town, with an average of 8.1h of sunshine.

UV index

The months with the lowest UV index in Stone Town are April through September, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high threat to health from unprotected exposure to Sun's UV rays for average individuals.
Note: In May, an average UV index of 6 transforms into the following instructions:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. Attempt to stay under shade and limit exposure to the Sun between 10 a.m. and 4 p.m., when UV radiation is at its peak. Remember, devices such as parasols or canopies might not provide complete sun protection. Stay sun-safe with clothing that is both closely woven and worn loosely.