September weather forecast
Calemba, Angola

September, the first month of the spring in Calemba, is also a hot month, with temperature in the range of an average high of 30.2°C (86.4°F) and an average low of 18°C (64.4°F).

Temperature

Calemba experiences an average high-temperature of a still hot 30.2°C (86.4°F) in September, marking an insignificant shift from 31.3°C (88.3°F) in August. Throughout September, Calemba registers a distinct decrease from daytime highs, reaching an average low of 18°C (64.4°F).

Heat index

September's average heat index is evaluated at a sweltering 36°C (96.8°F). Ensure additional precautions, heat exhaustion and heat cramps may be expected. Heatstroke could occur from sustained activity.
Understand that the heat index values take into account shaded locations and mild winds. Direct sunlight can potentially boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'feels like', is an estimation of the warmth sensation when considering humidity levels. The effect of weather is individual, with a variety of people experiencing it differently due to distinctions in body mass, height, and level of activity. Direct sun rays can make one feel hotter, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Children usually face more risks than adults as their ability to sweat is less. Additionally, their larger skin surface in relation to their petite bodies and higher heat output due to their activities increases their vulnerability.
Humans rely on perspiration as a cooling mechanism, wherein the evaporating sweat counteracts excessive warmth. In high relative humidity, the body's ability to evaporate heat is diminished, resulting in a heightened feeling of warmth. Accumulating more heat than the body can dissipate leads to an uptick in body temperature, with potential heat stress consequences.

Humidity

In Calemba, the average relative humidity in September is 70%.

Rainfall

In Calemba, Angola, in September, during 24.6 rainfall days, 82mm (3.23") of precipitation is typically accumulated. Throughout the year, there are 261.7 rainfall days, and 1536mm (60.47") of precipitation is accumulated.

Daylight

In September, the average length of the day in Calemba is 12h and 4min.
On the first day of September in Calemba, sunrise is at 05:59 and sunset at 17:57. On the last day of the month, sunrise is at 05:43 and sunset at 17:53 WAT.

Sunshine

The month with the most sunshine is September, with an average of 8.6h of sunshine.

UV index

The months with the highest UV index in Calemba are April through September, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from unsafe exposure to UV radiation for the ordinary person.
Note: The UV index of 6 in September translates into these instructions:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. Minimize exposure to direct sunlight and seek shade from 10 a.m. to 4 p.m., when UV radiation is most intense, but remember that shade structures may not offer complete protection. Boost your sun resistance with garments that are densely woven yet spacious.