September weather forecast
Pekalongan, Indonesia

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Weather in September

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.

Frequently asked questions

How hot does it get in Pekalongan in September?

The high-temperature during September is 29.3°C (84.7°F) and the low-temperature is 21.3°C (70.3°F). The average heat index (a.k.a. 'feels like', 'real feel'), which combines air temperature and relative humidity, in September is computed to be 35°C (95°F).

What is the least humid month in Pekalongan?

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

What is the average humidity in September in Pekalongan?

In Pekalongan, Indonesia, the average relative humidity in September is 79%.

How many days does it rain in September in Pekalongan?

In Pekalongan, in September, it is raining for 15.7 days, with typically 42mm (1.65") of accumulated precipitation.

What is the sea water temperature in September in Pekalongan?

In Pekalongan, in September, the average water temperature is 28.4°C (83.1°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

What is the average length of the day in September in Pekalongan?

In September, the average day length in Pekalongan is 12h and 4min.

When are sunrise and sunset in September in Pekalongan?

In September, on the first day of the month, sunrise is at 05:41 and sunset at 17:40. On the last day of the month, in Pekalongan, Indonesia, sunrise is at 05:26 and sunset at 17:36 WIB.

How long on average sun shines in September in Pekalongan?

In Pekalongan, the average sunshine duration in September is 8.2h.

What are the months with the lowest UV index in Pekalongan?

The months with the lowest UV index in Pekalongan are January, May through September and November, with an average maximum UV index of 6.

How high is the UV index in September in Pekalongan?

In September, the average daily maximum UV index is 6. A UV Index of 6 to 7 symbolizes a high health vulnerability from exposure to the Sun's UV radiation.

Average temperature in September
Pekalongan, Indonesia

Average temperature in September - Pekalongan, Indonesia
  • Average high temperature in September: 29.3°C

The warmest month (with the highest average high temperature) is March (30.5°C).
The month with the lowest average high temperature is July (28.5°C).

  • Average low temperature in September: 21.3°C

The month with the highest average low temperature is April (23.5°C).
The coldest month (with the lowest average low temperature) is August (20.9°C).

Average pressure in September
Pekalongan, Indonesia

Average pressure in September - Pekalongan, Indonesia
  • Average pressure in September: 1011.7mbar

The months with the highest atmospheric pressure are August and September (1011.7mbar).
The month with the lowest atmospheric pressure is December (1009.2mbar).

Average wind speed in September
Pekalongan, Indonesia

Average wind speed in September - Pekalongan, Indonesia
  • Average wind speed in September: 8.7km/h

The windiest month (with the highest average wind speed) is August (8.8km/h).
The calmest month (with the lowest average wind speed) is April (4.7km/h).

Average humidity in September
Pekalongan, Indonesia

Average humidity in September - Pekalongan, Indonesia
  • Average humidity in September: 79%

The months with the highest relative humidity are June and July (83%).
The months with the lowest relative humidity are September and October (79%).

Average rainfall in September
Pekalongan, Indonesia

Average rainfall in September - Pekalongan, Indonesia
  • Average rainfall in September: 42mm

The wettest month (with the highest rainfall) is January (273mm).
The driest month (with the least rainfall) is August (24mm).

Average rainfall days in September
Pekalongan, Indonesia

Average rainfall days in September - Pekalongan, Indonesia
  • Average rainfall days in September: 15.7 days

The month with the highest number of rainy days is January (28.3 days).
The month with the least rainy days is August (13.8 days).

Average sea temperature in September
Pekalongan, Indonesia

Average sea temperature in September - Pekalongan, Indonesia
  • Average sea temperature in September: 28.4°C

The best month for swimming (with the highest average sea temperature) is December (30.2°C).
The coldest month (with the lowest average sea temperature) is August (28°C).

Average daylight in September /
Average sunshine in September
Pekalongan, Indonesia

Average daylight in September / Average sunshine in September - Pekalongan, Indonesia
  • Average daylight in September: 12h and 1min

The month with the longest days is December (Average daylight: 12h and 30min).
The month with the shortest days is June (Average daylight: 11h and 42min).

  • Average sunshine in September: 8h and 1min

The month with the most sunshine is February (Average sunshine: 8h and 54min).
The month with the least sunshine is December (Average sunshine: 7h and 24min).

Average sunshine days in September
Pekalongan, Indonesia

Average sunshine days in September - Pekalongan, Indonesia
  • Average sunshine days in September: 9.8 days

The month with the most sunshine days is August (12.1 days).
The month with the least sunshine days is February (1.5 days).

Average UV index in September
Pekalongan, Indonesia

Average UV index in September - Pekalongan, Indonesia
  • Average UV index in September: 6

The months with the highest UV index are February, March, April, October and December (UV index 7).
The months with the lowest UV index are January, May, June, July, August, September and November (UV index 6).

Average cloud cover in September
Pekalongan, Indonesia

Average cloud cover in September - Pekalongan, Indonesia
  • Average cloud cover in September: 41

The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 37).

Average visibility in September
Pekalongan, Indonesia

Average visibility in September - Pekalongan, Indonesia
  • Average visibility in September: 9km

The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).

Pekalongan, Indonesia

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