September weather forecastUnisan, Philippines
September
Weather in September
The first month of the autumn, September, is still a warm month in Unisan, Philippines, with an average temperature varying between 29.8°C (85.6°F) and 26°C (78.8°F).Temperature
September commences with an average high-temperature of a warm 29.8°C (85.6°F), showing little deviation from August's 30.2°C (86.4°F). During September, Unisan's nighttime temperatures demonstrate a subtle cooling from daytime highs, stabilizing at 26°C (78.8°F).Heat index
The average heat index in September is evaluated at a sweltering 37°C (98.6°F). Exercise more precautions, heat cramps and heat exhaustion are potential risks. Continuous activity could precipitate heatstroke.Heat index data is primarily for areas with shade and subjected to light winds. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'feels like', gauges the sensation of temperature factoring in the air's moisture content. An individual's perception of weather can be affected by a variety of elements including metabolic differences, being pregnant, and their level of physical exertion. Exposure to direct sun rays can influence the heat you feel, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Children often do not understand the need to rest and hydrate. Thirst is a late manifestation of dehydration - therefore, it is essential to stay hydrated, particularly during prolonged physical activities.
The physiological response of the human body to excess warmth is to perspire, thereby cooling itself through sweat evaporation. When relative humidity increases, the body's capacity to evaporate heat decreases, leading to a heightened sense of warmth. Overheating can ensue when the body accumulates more heat than it can release, and dehydration severity may vary.
Humidity
In September, the average relative humidity is 81%.Rainfall
In Unisan, in September, during 27 rainfall days, 182mm (7.17") of precipitation is typically accumulated. In Unisan, during the entire year, the rain falls for 295.7 days and collects up to 1738mm (68.43") of precipitation.Sea temperature
In September, the average sea temperature is 28.7°C (83.7°F).Note: Water surface temperatures from 25°C (77°F) to 29°C (84.2°F) are considered optimal and extremely delightful for long-lasting pleasure in any water activity.
Daylight
In September, the average length of the day is 12h and 13min.On the first day of the month, sunrise is at 5:40 am and sunset at 6:03 pm. On the last day of September, sunrise is at 5:41 am and sunset at 5:42 pm PST.
Sunshine
The average sunshine in September is 8.5h.UV index
The months with the highest UV index are February through September, with an average maximum UV index of 7. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for average individuals.Note: The UV index of 7 in September translates into these instructions:
Deter overexposure. Protecting against the sun's effects is essential. The Sun's UV radiation is most potent between 10 a.m. and 4 p.m. Try to limit direct exposure to the Sun during this period. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Warning! The Sun's UV rays intensify with reflections from sand and water.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Unisan, Philippines
- Average high temperature in September: 29.8°C
The warmest month (with the highest average high temperature) is May (31.1°C).
The month with the lowest average high temperature is January (26.8°C).
- Average low temperature in September: 26°C
The month with the highest average low temperature is June (26.7°C).
The coldest month (with the lowest average low temperature) is February (23.9°C).
Average pressure in September
Unisan, Philippines
- Average pressure in September: 1008.1mbar
The month with the highest atmospheric pressure is February (1013.3mbar).
The month with the lowest atmospheric pressure is August (1007.6mbar).
Average wind speed in September
Unisan, Philippines
- Average wind speed in September: 9.9km/h
The windiest month (with the highest average wind speed) is January (19.2km/h).
The calmest month (with the lowest average wind speed) is May (8.3km/h).
Average humidity in September
Unisan, Philippines
- Average humidity in September: 81%
The month with the highest relative humidity is December (83%).
The month with the lowest relative humidity is May (78%).
Average rainfall in September
Unisan, Philippines
- Average rainfall in September: 182mm
The wettest month (with the highest rainfall) is December (252mm).
The driest month (with the least rainfall) is April (65mm).
Average rainfall days in September
Unisan, Philippines
- Average rainfall days in September: 27 days
The months with the highest number of rainy days are October and November (27.7 days).
The month with the least rainy days is February (18.5 days).
Average sea temperature in September
Unisan, Philippines
- Average sea temperature in September: 28.7°C
The best month for swimming (with the highest average sea temperature) is June (29.9°C).
The coldest month (with the lowest average sea temperature) is February (26.7°C).
Average daylight in September /
Average sunshine in September
Unisan, Philippines
- Average daylight in September: 12h and 12min
The month with the longest days is June (Average daylight: 12h and 54min).
The month with the shortest days is December (Average daylight: 11h and 18min).
- Average sunshine in September: 8h and 30min
The month with the most sunshine is May (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in September
Unisan, Philippines
- Average sunshine days in September: 2 days
The month with the most sunshine days is April (6.6 days).
The month with the least sunshine days is November (1 days).
Average UV index in September
Unisan, Philippines
- Average UV index in September: 7
The months with the highest UV index are February, March, April, May, June, July, August and September (UV index 7).
The months with the lowest UV index are January, October, November and December (UV index 6).
Average cloud cover in September
Unisan, Philippines
- Average cloud cover in September: 41
The month with the most cloud cover is January (Cloud cover 60).
The month with the least cloud cover is May (Cloud cover 31).
Average visibility in September
Unisan, Philippines
- Average visibility in September: 9km
The months with the highest visibility are January, February, March, April, May, June, August and October (10km).
The months with the lowest visibility are July, September, November and December (9km).
