September weather forecastCalapan, Philippines
September
Weather in September
The first month of the autumn, September, is still a warm month in Calapan, Philippines, with an average temperature varying between 25.5°C (77.9°F) and 29°C (84.2°F).Temperature
Calapan commences September with an average high-temperature of a still warm 29°C (84.2°F), maintaining a close resemblance to the previous month. Calapan documents an average low-temperature of 25.5°C (77.9°F) for the nights of September.Heat index
September's heat index is computed to be a sweltering 35°C (95°F). Adopt special protective actions against heat exhaustion and heat cramps. Long-duration activity risks heatstroke.Remember that heat index calculations are made for conditions in the shade with light wind. The heat index may experience an enhancement of 15 Fahrenheit (8 Celsius) degrees under direct sunlight.
Note: The heat index, also known as 'apparent temperature' or 'real feel', gives a temperature feeling by integrating air temperature and humidity. The effect is experienced differently by individuals, hinging on unique characteristics such as body mass, stature, and level of activity. Should you be directly under the sun, anticipate a possible increase in the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children are often less aware of the need to rest and re-hydrate. Thirst is a late sign of dehydration - it's vital to remain hydrated, particularly during prolonged physical activities.
The human body normally cools itself by perspiration. Excessive warmth is eliminated from the body by evaporation of sweat. When the air holds a significant amount of moisture, the efficiency of the evaporation process is decreased, preventing the body from cooling down efficiently, leading to the sensation of overheating. Heat disorders may be on the horizon when body temperatures rise from inadequate heat management.
Humidity
In Calapan, the average relative humidity in September is 80%.Rainfall
In Calapan, during September, the rain falls for 22.8 days and regularly aggregates up to 91mm (3.58") of precipitation. In Calapan, Philippines, during the entire year, the rain falls for 257.2 days and collects up to 1125mm (44.29") of precipitation.Sea temperature
In Calapan, the average seawater temperature in September is 28.5°C (83.3°F).Note: For swimming, diving, and enjoying other water activities, the range of 25°C (77°F) to 29°C (84.2°F) in water temperature is considered ideal, offering pleasure for extended periods without discomfort.
Daylight
The average length of the day in September is 12h and 13min.On the first day of the month, sunrise is at 5:44 am and sunset at 6:06 pm. On the last day of September, in Calapan, Philippines, sunrise is at 5:44 am and sunset at 5:45 pm PST.
Sunshine
In September, the average sunshine is 8.9h.UV index
February through November, with an average maximum UV index of 7, are months with the highest UV index. A UV Index of 6 to 7 symbolizes a high health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: In September, the maximum UV index of 7 transforms into these recommendations:
Guard oneself from overexposure. Defence against sun injury is vital. The Sun's UV radiation is most potent between the hours of 10 a.m. and 4 p.m. Try to avoid direct sunlight during this time. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes. Beware! Reflecting off water and sand, UV rays are much stronger.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Calapan, Philippines
- Average high temperature in September: 29°C
The warmest month (with the highest average high temperature) is May (30.4°C).
The month with the lowest average high temperature is January (26.6°C).
- Average low temperature in September: 25.5°C
The month with the highest average low temperature is June (26.5°C).
The coldest month (with the lowest average low temperature) is February (23.3°C).
Average pressure in September
Calapan, Philippines
- Average pressure in September: 1008.3mbar
The month with the highest atmospheric pressure is February (1012.6mbar).
The months with the lowest atmospheric pressure are July and August (1007.9mbar).
Average wind speed in September
Calapan, Philippines
- Average wind speed in September: 8.5km/h
The windiest month (with the highest average wind speed) is January (14.8km/h).
The calmest month (with the lowest average wind speed) is June (8km/h).
Average humidity in September
Calapan, Philippines
- Average humidity in September: 80%
The months with the highest relative humidity are January and December (82%).
The month with the lowest relative humidity is May (76%).
Average rainfall in September
Calapan, Philippines
- Average rainfall in September: 91mm
The wettest month (with the highest rainfall) is December (183mm).
The driest month (with the least rainfall) is April (38mm).
Average rainfall days in September
Calapan, Philippines
- Average rainfall days in September: 22.8 days
The month with the highest number of rainy days is December (25.2 days).
The month with the least rainy days is April (15.3 days).
Average sea temperature in September
Calapan, Philippines
- Average sea temperature in September: 28.5°C
The best month for swimming (with the highest average sea temperature) is June (30°C).
The coldest month (with the lowest average sea temperature) is February (26.8°C).
Average daylight in September /
Average sunshine in September
Calapan, 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 24min).
- Average sunshine in September: 8h and 54min
The month with the most sunshine is April (Average sunshine: 11h and 12min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days in September
Calapan, Philippines
- Average sunshine days in September: 4.8 days
The month with the most sunshine days is August (9.8 days).
The month with the least sunshine days is November (1.4 days).
Average UV index in September
Calapan, Philippines
- Average UV index in September: 7
The months with the highest UV index are February, March, April, May, June, July, August, September, October and November (UV index 7).
The months with the lowest UV index are January and December (UV index 6).
Average cloud cover in September
Calapan, Philippines
- Average cloud cover in September: 38
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is April (Cloud cover 27).
Average visibility in September
Calapan, Philippines
- 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).
