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
Santiago de la Frontera transitions into September recording an average high-temperature of a moderately hot 29.3°C (84.7°F), closely aligning with the preceding month's temperature. An average low-temperature of 18.9°C (66°F) is common in Santiago de la Frontera, El Salvador, during the nights of September.Heat index
The heat index value during September is appraised at a sweltering 37°C (98.6°F). Take additional safety steps, risk of heat exhaustion and heat cramps is notable. Prolonged activity may cause heatstroke.Heat index determinations are made taking into account the shade and light air movements. Being exposed to direct sunshine might trigger a heat index increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature' or 'real feel', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. An individual's temperature experience can be influenced by extra factors, including metabolic differences, activity levels, and clothing. 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 of high significance for children. Young individuals are typically more threatened than adults due to their reduced perspiration. Also, the larger skin surface proportionate to their small bodies and the increased heat from their activities magnify their risk.
Perspiring is how the human body naturally cools down, as sweat's evaporation takes away excess heat. In the presence of elevated relative humidity, the evaporation rate decreases. This reduction leads to increased body heat retention compared to conditions of dry air. As body temperatures escalate without effective heat release, one might face dehydration threats.
Humidity
In September, the average relative humidity is 85%.Rainfall
In Santiago de la Frontera, during September, the rain falls for 24.7 days and regularly aggregates up to 141mm (5.55") of precipitation. In Santiago de la Frontera, during the entire year, the rain falls for 181.4 days and collects up to 1055mm (41.54") of precipitation.Daylight
In Santiago de la Frontera, the average length of the day in September is 12h and 13min.On the first day of the month, sunrise is at 05:46 and sunset at 18:09. On the last day of September, sunrise is at 05:48 and sunset at 17:48 CST.
Sunshine
In September, the average sunshine is 7.8h.UV index
With an average maximum UV index of 5, September is the month with the lowest UV index in Santiago de la Frontera. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 5 during September translates into the following guidance:
Put precautions into practice - Ensuring skin and eye safety is a necessity. To protect against the Sun's most potent rays, avoid direct exposure around midday. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September in Santiago de la Frontera?
What is the average humidity in September in Santiago de la Frontera?
How much does it rain in Santiago de la Frontera in September?
How many hours of daylight does Santiago de la Frontera have in September?
What time are sunrise and sunset in September in Santiago de la Frontera?
How many hours of sunshine does Santiago de la Frontera have in September?
What is the month with the lowest UV index in Santiago de la Frontera?
What is the UV index intensity in September in Santiago de la Frontera?
Average temperature in September
Santiago de la Frontera, El Salvador
- Average high temperature in September: 29.3°C
The warmest month (with the highest average high temperature) is April (33.2°C).
The month with the lowest average high temperature is October (27.9°C).
- Average low temperature in September: 18.9°C
The month with the highest average low temperature is May (20.7°C).
The coldest month (with the lowest average low temperature) is January (16.3°C).
Average pressure in September
Santiago de la Frontera, El Salvador
- Average pressure in September: 1011.8mbar
The month with the highest atmospheric pressure is January (1014.2mbar).
The months with the lowest atmospheric pressure are May and October (1011.7mbar).
Average wind speed in September
Santiago de la Frontera, El Salvador
- Average wind speed in September: 4.2km/h
The windiest month (with the highest average wind speed) is January (9km/h).
The calmest month (with the lowest average wind speed) is September (4.2km/h).
Average humidity in September
Santiago de la Frontera, El Salvador
- Average humidity in September: 85%
The month with the highest relative humidity is October (86%).
The month with the lowest relative humidity is March (63%).
Average rainfall in September
Santiago de la Frontera, El Salvador
- Average rainfall in September: 141mm
The wettest month (with the highest rainfall) is May (198mm).
The driest month (with the least rainfall) is January (2mm).
Average rainfall days in September
Santiago de la Frontera, El Salvador
- Average rainfall days in September: 24.7 days
The month with the highest number of rainy days is June (25 days).
The month with the least rainy days is January (1.9 days).
Average daylight in September /
Average sunshine in September
Santiago de la Frontera, El Salvador
- Average daylight in September: 12h and 1min
The month with the longest days is June (Average daylight: 13h and 0min).
The month with the shortest days is December (Average daylight: 11h and 18min).
- Average sunshine in September: 7h and 5min
The month with the most sunshine is April (Average sunshine: 11h and 18min).
The month with the least sunshine is October (Average sunshine: 7h and 12min).
Average sunshine days in September
Santiago de la Frontera, El Salvador
- Average sunshine days in September: 3.7 days
The months with the most sunshine days are January and December (28.5 days).
The month with the least sunshine days is September (3.7 days).
Average UV index in September
Santiago de la Frontera, El Salvador
- Average UV index in September: 5
The months with the highest UV index are January, February, March, April, May, June, July, August, October, November and December (UV index 6).
The month with the lowest UV index is September (UV index 5).
Average cloud cover in September
Santiago de la Frontera, El Salvador
- Average cloud cover in September: 57
The month with the most cloud cover is September (Cloud cover 57).
The month with the least cloud cover is January (Cloud cover 17).
Average visibility in September
Santiago de la Frontera, El Salvador
- Average visibility in September: 6km
The months with the highest visibility are February, March and April (10km).
The month with the lowest visibility is September (6km).
