September weather forecast
Pekalongan, Indonesia

September, the first month of the spring in Pekalongan, is still a warm month, with temperature in the range of an average low of 21.3°C (70.3°F) and an average high of 29.3°C (84.7°F).

Temperature

In Pekalongan, September's average high-temperature stands at a still moderately hot 29.3°C (84.7°F), closely related to the preceding month. Throughout September, the average low-temperature dips to an agreeable 21.3°C (70.3°F).

Heat index

September's heat index is computed to be a fiery hot 35°C (95°F). Ensure extra safety steps, heat exhaustion and heat cramps are likely. Long activity might lead to heatstroke.
When considering the heat index, it's pivotal to note it is for shade and mild wind conditions. Direct sunlight has the potential to heighten heat index values by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'apparent temperature', melds the effects of warmth and moisture to generate a feeling of heat. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. It is essential to be conscious of the fact that direct sunlight can intensify the felt heat, leading to an elevation in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Young ones regularly neglect the requirement for rest and fluid replenishment. Thirst is a late stage of dehydration - so, it is necessary to keep hydrated, particularly during extended periods of physical exertion.
When it comes to cooling down, the human body's primary method is through perspiration, making use of sweat evaporation to eliminate excess heat. Increased relative humidity interferes with body cooling by slowing the rate of evaporation, resulting in a slower body cooling rate and a heightened feeling of heat. Overheating and potential dehydration arise when body heat gain eclipses its release capability.

Humidity

The months with the lowest humidity in Pekalongan are September and October, with an average relative humidity of 79%.

Rainfall

In Pekalongan, during September, the rain falls for 15.7 days and regularly aggregates up to 42mm (1.65") of precipitation. In Pekalongan, during the entire year, the rain falls for 265.2 days and collects up to 1898mm (74.72") of precipitation.

Sea temperature

In September, the average sea temperature in Pekalongan is 28.4°C (83.1°F).
Note: Temperatures between 25°C (77°F) and 29°C (84.2°F) are excellent for swimming, diving, and other water activities, providing comfort and enjoyment for extended periods without discomfort.

Daylight

In September, the average length of the day in Pekalongan, Indonesia, is 12h and 4min.
On the first day of September, sunrise is at 05:41 and sunset at 17:40. On the last day of the month, sunrise is at 05:26 and sunset at 17:36 WIB.

Sunshine

The average sunshine in September in Pekalongan is 8.2h.

UV index

January, May through September and November, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: A daily high UV index of 6 in September leads to these guidelines:
Uphold preventive measures and conform to sun safety guidelines. Defending against skin and eye harm is crucial. Avoid direct Sun exposure from 10 a.m. to 4 p.m., a period when UV radiation is most intense, and remember that not all shade structures provide full protection. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Watch out! Sand and water enhance the UV exposure you receive.