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
Entering September, Santo Tomás's average high-temperature reads a still hot 30.5°C (86.9°F), indicating a close resemblance to the previous month's climate. Santo Tomás records an average temperature drop to a pleasant 20.9°C (69.6°F) in September.Heat index
In September, the heat index is estimated at a scorching 40°C (104°F). Adopt heightened preventive measures, heat exhaustion and heat cramps are probable. Persistent activity could lead to heatstroke.Heat index evaluations are typically in the context of light winds and shaded environments. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'feels like' or 'felt air temperature', is a fusion of air temperature and moisture levels to demonstrate the sensation of heat. Factors encompassing physical activity, clothing, and metabolic differences have a role in shaping the individual's impression of temperature. Keep aware, the sun, when shining directly, can intensify the heat experience, pushing the heat index up by 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially crucial for babies and toddlers. Youngsters often neglect the necessity for rest and hydration. Thirst is a sign of advancing dehydration - thus the importance of maintaining hydration, specifically during long-lasting physical activities.
The body's innate mechanism to counteract overheating is through perspiration, as it leverages the cooling effects of sweat evaporation. When relative humidity is at high levels, the evaporation rate lessens, causing the body to keep more heat than it would in less humid conditions. When body temperature rises due to excess heat gain beyond its removal capability, one might experience heat-related disorders.
Humidity
September and October, with an average relative humidity of 82%, are the most humid months.Rainfall
In Santo Tomás, in September, during 26.5 rainfall days, 150mm (5.91") of precipitation is typically accumulated. In Santo Tomás, El Salvador, during the entire year, the rain falls for 196.7 days and collects up to 1216mm (47.87") of precipitation.Daylight
In September, the average length of the day is 12h and 12min.On the first day of September, sunrise is at 05:45 and sunset at 18:07. On the last day of the month, sunrise is at 05:45 and sunset at 17:46 CST.
Sunshine
In Santo Tomás, the average sunshine in September is 9h.UV index
May through December, with an average maximum UV index of 6, are months with the lowest UV index. 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: In September, a regular UV index of 6 translates into these guidelines:
Endorse precautions and be consistent with sun safety guidelines. Preventing sunburn is paramount. 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. Opt for tightly woven and loose clothing to enhance protection from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is it in Santo Tomás in September?
What is the most humid month in Santo Tomás?
What is the average humidity in September in Santo Tomás?
How many days does it rain in September in Santo Tomás?
How many hours of daylight does Santo Tomás have in September?
When is the sunrise / sunset in September in Santo Tomás?
How long on average sun shines in September in Santo Tomás?
What are the months with the lowest UV index in Santo Tomás?
What is the UV index intensity in September in Santo Tomás?
Average temperature in September
Santo Tomás, El Salvador
- Average high temperature in September: 30.5°C
The warmest months (with the highest average high temperature) are March and April (33.4°C).
The month with the lowest average high temperature is October (29.7°C).
- Average low temperature in September: 20.9°C
The month with the highest average low temperature is May (22.6°C).
The coldest month (with the lowest average low temperature) is January (19°C).
Average pressure in September
Santo Tomás, El Salvador
- Average pressure in September: 1011.5mbar
The month with the highest atmospheric pressure is January (1013.6mbar).
The months with the lowest atmospheric pressure are May and October (1011.3mbar).
Average wind speed in September
Santo Tomás, El Salvador
- Average wind speed in September: 4.5km/h
The windiest month (with the highest average wind speed) is January (8km/h).
The calmest month (with the lowest average wind speed) is June (4.4km/h).
Average humidity in September
Santo Tomás, El Salvador
- Average humidity in September: 82%
The months with the highest relative humidity are September and October (82%).
The month with the lowest relative humidity is March (61%).
Average rainfall in September
Santo Tomás, El Salvador
- Average rainfall in September: 150mm
The wettest month (with the highest rainfall) is May (267mm).
The driest month (with the least rainfall) is January (2mm).
Average rainfall days in September
Santo Tomás, El Salvador
- Average rainfall days in September: 26.5 days
The month with the highest number of rainy days is May (26.9 days).
The month with the least rainy days is January (2.3 days).
Average daylight in September /
Average sunshine in September
Santo Tomás, 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: 9h and 0min
The month with the most sunshine is April (Average sunshine: 11h and 18min).
The months with the least sunshine are January and December (Average sunshine: 7h and 42min).
Average sunshine days in September
Santo Tomás, El Salvador
- Average sunshine days in September: 2.5 days
The month with the most sunshine days is January (27.7 days).
The month with the least sunshine days is September (2.5 days).
Average UV index in September
Santo Tomás, El Salvador
- Average UV index in September: 6
The months with the highest UV index are January, February, March and April (UV index 7).
The months with the lowest UV index are May, June, July, August, September, October, November and December (UV index 6).
Average cloud cover in September
Santo Tomás, El Salvador
- Average cloud cover in September: 41
The month with the most cloud cover is September (Cloud cover 41).
The month with the least cloud cover is January (Cloud cover 13).
Average visibility in September
Santo Tomás, El Salvador
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, April and December (10km).
The months with the lowest visibility are June, August, September and October (8km).
