Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
September
Weather in September
Temperature
The weather during September records an average high-temperature of a still tropical 30.4°C (86.7°F), closely mirroring the preceding month. Santiago Nonualco, during the month of September, experiences an average low-temperature of 21.5°C (70.7°F).Heat index
During September, the heat index is calculated to be a blistering 40°C (104°F). Take more safety measures, heat exhaustion and heat cramps are potential outcomes. Persistent activity might lead to heatstroke.The heat index's values are generally associated with conditions in shade and light breezes. When exposed to the direct sun, the heat index may augment by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', gauges the sensation of temperature factoring in the air's moisture content. Factors such as metabolic variation, pregnancy, and physical activity play a role in one's impression of weather. Be mindful that being in direct sunlight might mean feeling hotter, with the heat index rising by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
The physiological way the human body responds to excessive heat is by inducing perspiration, using sweat evaporation as a cooling mechanism. A surge in relative humidity can disrupt the body's normal cooling function by slowing evaporation, hence reducing the rate at which the body cools and intensifying the perception of heat. When heat surpasses the body's release mechanisms, dehydration and overheating risks become pronounced.
Humidity
The most humid month in Santiago Nonualco is September, with an average relative humidity of 84%.Rainfall
In Santiago Nonualco, in September, it is raining for 28.7 days, with typically 188mm (7.4") of accumulated precipitation. In Santiago Nonualco, El Salvador, during the entire year, the rain falls for 216.4 days and collects up to 1164mm (45.83") of precipitation.Daylight
In Santiago Nonualco, the average length of the day in September is 12h and 12min.On the first day of September, sunrise is at 05:44 and sunset at 18:06. On the last day of the month, sunrise is at 05:45 and sunset at 17:45 CST.
Sunshine
The average sunshine in September in Santiago Nonualco is 8.3h.UV index
The months with the lowest UV index are August through November, with an average maximum UV index of 6. A UV Index of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV rays for the average person.Note: The daily maximum UV index of 6 in September interprets into the following advice:
Shun overexposure. Protection from sun ravages is indispensable. Remember that UV radiation from the Sun is strongest between 10 a.m. and 4 p.m. Make an effort to limit direct sun exposure during this time. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in Santiago Nonualco in September?
What is the most humid month in Santiago Nonualco?
What is the average humidity in September in Santiago Nonualco?
How many days does it rain in September in Santiago Nonualco?
How many hours of daylight does Santiago Nonualco have in September?
What time are sunrise and sunset in September in Santiago Nonualco?
How many hours of sunshine does Santiago Nonualco have in September?
What is the month with the lowest UV index in Santiago Nonualco?
How high is the UV index in September in Santiago Nonualco?
Average temperature in September
Santiago Nonualco, El Salvador
- Average high temperature in September: 30.4°C
The warmest month (with the highest average high temperature) is March (34°C).
The month with the lowest average high temperature is October (30.2°C).
- Average low temperature in September: 21.5°C
The month with the highest average low temperature is April (23.6°C).
The coldest months (with the lowest average low temperature) are January and December (20°C).
Average pressure in September
Santiago Nonualco, El Salvador
- Average pressure in September: 1011.3mbar
The month with the highest atmospheric pressure is January (1013.2mbar).
The months with the lowest atmospheric pressure are May and October (1011.1mbar).
Average wind speed in September
Santiago Nonualco, El Salvador
- Average wind speed in September: 5.2km/h
The windiest month (with the highest average wind speed) is January (8.1km/h).
The calmest month (with the lowest average wind speed) is June (5.1km/h).
Average humidity in September
Santiago Nonualco, El Salvador
- Average humidity in September: 84%
The month with the highest relative humidity is September (84%).
The month with the lowest relative humidity is March (60%).
Average rainfall in September
Santiago Nonualco, El Salvador
- Average rainfall in September: 188mm
The wettest month (with the highest rainfall) is October (215mm).
The driest month (with the least rainfall) is January (2mm).
Average rainfall days in September
Santiago Nonualco, El Salvador
- Average rainfall days in September: 28.7 days
The months with the highest number of rainy days are May and September (28.7 days).
The month with the least rainy days is January (2.4 days).
Average daylight in September /
Average sunshine in September
Santiago Nonualco, El Salvador
- Average daylight in September: 12h and 1min
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 2min
The month with the most sunshine is April (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 7h and 36min).
Average sunshine days in September
Santiago Nonualco, El Salvador
- Average sunshine days in September: 0.7 days
The month with the most sunshine days is January (27.2 days).
The month with the least sunshine days is September (0.7 days).
Average UV index in September
Santiago Nonualco, El Salvador
- Average UV index in September: 6
The months with the highest UV index are January, February, March, April, May, June, July and December (UV index 7).
The months with the lowest UV index are August, September, October and November (UV index 6).
Average cloud cover in September
Santiago Nonualco, El Salvador
- Average cloud cover in September: 48
The month with the most cloud cover is September (Cloud cover 48).
The month with the least cloud cover is January (Cloud cover 15).
Average visibility in September
Santiago Nonualco, El Salvador
- Average visibility in September: 7km
The months with the highest visibility are January, February, March, April and December (10km).
The month with the lowest visibility is September (7km).
