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 snowfall in September
- Average snowfall 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
Upon the onset of September, San Andrés witnesses an average high-temperature of a still tropical 31.2°C (88.2°F), showing a close resemblance to the prior month. Throughout the nights in September, an average low-temperature of 19.8°C (67.6°F) is noted in San Andrés.Heat index
September's heat index is computed to be a blisteringly hot 42°C (107.6°F). More protective measures are required - heat exhaustion and heat cramps are likely. Heatstroke may follow lengthy activity.Research indicates the heat index considers values in shaded locales and with light winds. With exposure to direct sunshine, the heat index could climb by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', binds temperature metrics with humidity values to give a sense of the actual warmth. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Young ones often do not realize the necessity to rest and replenish their fluids. Thirst is a delayed indication of dehydration - keeping hydrated, particularly in prolonged physical activity, is crucial.
The natural cooling mechanism in humans involves perspiration, where the evaporation of sweat balances out excessive warmth. 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. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.
Humidity
September and October, with an average relative humidity of 82%, are the most humid months in San Andrés.Rainfall
The month with the most rainfall is September, when the rain falls for 26.1 days and typically aggregates up to 157mm (6.18") of precipitation.Snowfall
September is the only month when snow falls. The month with the most snowfall is September, when snow falls for 0.1 days and typically aggregates up to 1mm (0.04") of snow.Daylight
In September, the average length of the day is 12h and 13min.On the first day of September in San Andrés, sunrise is at 05:42 and sunset at 18:05. On the last day of the month, sunrise is at 05:43 and sunset at 17:44 CST.
Sunshine
In September, the average sunshine is 8.6h.UV index
January, May, June, August through December, with an average maximum UV index of 6, are months with the lowest UV index. A UV Index reading of 6 to 7 represents a high health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The UV index of 6 in September translates into these instructions:
Avoid overexposure. Fair-skinned individuals can burn in under 20 minutes. Stay in the shade and limit direct sun exposure between 10 a.m. and 4 p.m., when UV radiation is at its strongest. Remember, however, that not all shade structures provide full sun protection. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What are the most humid months?
What is the average humidity in September?
What is the rainiest month?
How many days does it rain in September?
What is the snowiest month in San Andrés?
When does it start snowing?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
What are the months with the lowest UV index?
How high is the UV index in September?
Average temperature in September
San Andrés, Honduras
- Average high temperature in September: 31.2°C
The warmest month (with the highest average high temperature) is April (35°C).
The month with the lowest average high temperature is October (29.9°C).
- Average low temperature in September: 19.8°C
The month with the highest average low temperature is May (21.9°C).
The coldest month (with the lowest average low temperature) is December (17.8°C).
Average pressure in September
San Andrés, Honduras
- Average pressure in September: 1011.6mbar
The month with the highest atmospheric pressure is January (1014mbar).
The months with the lowest atmospheric pressure are May, September and October (1011.6mbar).
Average wind speed in September
San Andrés, Honduras
- Average wind speed in September: 3.7km/h
The windiest month (with the highest average wind speed) is January (7.3km/h).
The calmest month (with the lowest average wind speed) is September (3.7km/h).
Average humidity in September
San Andrés, Honduras
- 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 (56%).
Average rainfall in September
San Andrés, Honduras
- Average rainfall in September: 157mm
The wettest month (with the highest rainfall) is September (157mm).
The driest month (with the least rainfall) is January (1mm).
Average rainfall days in September
San Andrés, Honduras
- Average rainfall days in September: 26.1 days
The month with the highest number of rainy days is September (26.1 days).
The month with the least rainy days is January (1.6 days).
Average snowfall in September
San Andrés, Honduras
- Average snowfall in September: 1mm
The month with the highest snowfall is September (1mm).
The months with the least snowfall are January, February, March, April, May, June, July, August, October, November and December (0mm).
Average snowfall days in September
San Andrés, Honduras
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is September (0.1 days).
The months with the least snowfall days are January, February, March, April, May, June, July, August, October, November and December (0 days).
Average daylight in September /
Average sunshine in September
San Andrés, Honduras
- 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: 8h and 4min
The month with the most sunshine is April (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 7h and 24min).
Average sunshine days in September
San Andrés, Honduras
- Average sunshine days in September: 3.3 days
The month with the most sunshine days is January (29.1 days).
The month with the least sunshine days is September (3.3 days).
Average UV index in September
San Andrés, Honduras
- Average UV index in September: 6
The months with the highest UV index are February, March, April and July (UV index 7).
The months with the lowest UV index are January, May, June, August, September, October, November and December (UV index 6).
Average cloud cover in September
San Andrés, Honduras
- Average cloud cover in September: 48
The month with the most cloud cover is September (Cloud cover 48).
The months with the least cloud cover are January and December (Cloud cover 13).
Average visibility in September
San Andrés, Honduras
- 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).
