September weather forecastBolon, Indonesia
September
Weather in September
September, the first month of the spring in Bolon, is still a warm month, with an average temperature fluctuating between 22.1°C (71.8°F) and 28.3°C (82.9°F).Temperature
With the onset of September, a modest change to a still moderately hot 28.3°C (82.9°F) from August's 27.9°C (82.2°F) is noted in high-temperature. The low-temperature averages to an agreeable 22.1°C (71.8°F) during the nights of September.Heat index
September's average heat index is computed to be a tropical 33°C (91.4°F). Ensure heightened precautions, risk of heat cramps and heat exhaustion is significant. Sustained activity could provoke heatstroke.Keep in mind the heat index values are meant for areas in shade and with light wind. With direct sunlight, the heat index could increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', marries air temperature and humidity to produce a value illustrating perceived warmth. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Direct sun exposure is noteworthy in its ability to escalate the felt temperature, potentially adding 15 Fahrenheit (8 Celsius) degrees to the heat index. Heat index values are highly important for children. Children often fail to recognize the requirement to rest and rehydrate. Thirst, being a late symptom of dehydration, underlines the importance of maintaining hydration, especially during ongoing physical activities.
Humidity
September and October, with an average relative humidity of 79%, are the least humid months.Rainfall
In Bolon, during September, the rain falls for 13.9 days and regularly aggregates up to 23mm (0.91") of precipitation. In Bolon, during the entire year, the rain falls for 245 days and collects up to 906mm (35.67") of precipitation.Daylight
The average length of the day in September is 12h and 4min.On the first day of September, sunrise is at 05:37 and sunset at 17:36. On the last day of the month, sunrise is at 05:21 and sunset at 17:31 WIB.
Sunshine
The average sunshine in September is 8.8h.UV index
The months with the highest UV index are February through May, September through December, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high threat to health from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index of 7 during September translates into these guidelines:
Resist overexposure. Safeguarding from solar damage is indispensable. Seek shade and limit direct sun exposure between 10 a.m. and 4 p.m., the peak period for UV radiation. Keep in mind that shade structures like parasols or canopies do not offer complete sun protection. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Bolon, Indonesia
- Average high temperature in September: 28.3°C
The warmest month (with the highest average high temperature) is October (29.4°C).
The month with the lowest average high temperature is July (27.8°C).
- Average low temperature in September: 22.1°C
The months with the highest average low temperature are January and November (24.3°C).
The coldest month (with the lowest average low temperature) is August (21.9°C).
Average pressure in September
Bolon, Indonesia
- Average pressure in September: 1011.9mbar
The months with the highest atmospheric pressure are August and September (1011.9mbar).
The month with the lowest atmospheric pressure is December (1009.1mbar).
Average wind speed in September
Bolon, Indonesia
- Average wind speed in September: 13.4km/h
The windiest month (with the highest average wind speed) is August (14.5km/h).
The calmest month (with the lowest average wind speed) is March (8.4km/h).
Average humidity in September
Bolon, Indonesia
- Average humidity in September: 79%
The months with the highest relative humidity are May and June (82%).
The months with the lowest relative humidity are September and October (79%).
Average rainfall in September
Bolon, Indonesia
- Average rainfall in September: 23mm
The wettest month (with the highest rainfall) is January (126mm).
The driest month (with the least rainfall) is August (14mm).
Average rainfall days in September
Bolon, Indonesia
- Average rainfall days in September: 13.9 days
The months with the highest number of rainy days are January, March and November (24.7 days).
The month with the least rainy days is August (11.4 days).
Average daylight in September /
Average sunshine in September
Bolon, Indonesia
- Average daylight in September: 12h and 6min
The month with the longest days is December (Average daylight: 12h and 36min).
The month with the shortest days is June (Average daylight: 11h and 42min).
- Average sunshine in September: 8h and 48min
The month with the most sunshine is February (Average sunshine: 9h and 30min).
The month with the least sunshine is December (Average sunshine: 7h and 24min).
Average sunshine days in September
Bolon, Indonesia
- Average sunshine days in September: 9.5 days
The month with the most sunshine days is August (11.6 days).
The month with the least sunshine days is November (3.4 days).
Average UV index in September
Bolon, Indonesia
- Average UV index in September: 7
The months with the highest UV index are February, March, April, May, September, October, November and December (UV index 7).
The months with the lowest UV index are January, June, July and August (UV index 6).
Average cloud cover in September
Bolon, Indonesia
- Average cloud cover in September: 39
The months with the most cloud cover are January and December (Cloud cover 49).
The month with the least cloud cover is June (Cloud cover 35).
Average visibility in September
Bolon, Indonesia
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (10km).
