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 sea temperature 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
Weather in September
Temperature
Temperature readings reach their annual highs in September, averaging 28.9°C (84°F) and a minimum average of 28°C (82.4°F).Heat index
In September, the heat index is evaluated at a hot 34°C (93.2°F). Undertake special precautions, the probability of heat exhaustion and heat cramps is high. Prolonged activity may provoke heatstroke.It is important to note that the heat index values are for shaded areas and light wind scenarios. Heat index values have the potential to be boosted by 15 Fahrenheit (8 Celsius) degrees due to direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is the result of factoring in humidity to the air temperature, indicating perceived warmth. The impact of temperature is individual, as people's perception of weather may change based on their body mass, height, and physical activity. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values hold particular importance for children. Children often lack awareness of the importance of taking breaks and rehydrating. The feeling of thirst is a late indication of dehydration, so maintaining hydration, especially during long periods of physical activity, is critical.
Humidity
In September, the average relative humidity is 77%.Rainfall
In San Andrés, in September, during 24.1 rainfall days, 124mm (4.88") of precipitation is typically accumulated. Throughout the year, in San Andrés, there are 276.2 rainfall days, and 1366mm (53.78") of precipitation is accumulated.Sea temperature
September is the month with the warmest seawater in San Andrés, Colombia, with an average sea temperature of 29.4°C (84.9°F).Note: For activities such as swimming and diving, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as particularly pleasant and satisfying for prolonged periods without feeling uneasy.
Daylight
The average length of the day in September in San Andrés is 12h and 11min.On the first day of the month, sunrise is at 06:15 and sunset at 18:37. On the last day of September, sunrise is at 06:15 and sunset at 18:17 -05.
Sunshine
The average sunshine in September is 8.3h.UV index
January through December, with an average maximum UV index of 7, are months with the highest UV index in San Andrés, Colombia. January through December, with an average maximum UV index of 7, are months with the lowest UV index. A UV Index value of 6 to 7 symbolizes a high health hazard from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index of 7 in September interprets into the following recommendations:
Undertake protective measures and comply with sun safety rules. Shielding against skin and eye damage is essential. UV radiation from the Sun is most intense between 10 a.m. and 4 p.m. Try to avoid direct sunlight during this period. Experience reduced UV exposure by about half when donning a wide-brim hat. Be alert! The reflection of water and sand augments UV radiation intensity.
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Data Sources | Weather Forecasting & Climate
Frequently asked questions
What part of the year is the hottest in San Andrés?
How hot is September in San Andrés?
What is the average humidity in September in San Andrés?
How many days does it rain in September in San Andrés?
When is the sea warmest in San Andrés?
How warm is the water in September in San Andrés?
How many hours of daylight does San Andrés have in September?
When is the sunrise / sunset in September in San Andrés?
How many hours of sunshine does San Andrés have in September?
What is the month with the highest UV index in San Andrés?
What is the month with the lowest UV index in San Andrés?
What is the UV index intensity in September in San Andrés?
Average temperature in September
San Andrés, Colombia
- Average high temperature in September: 28.9°C
The warmest month (with the highest average high temperature) is September (28.9°C).
The month with the lowest average high temperature is March (27°C).
- Average low temperature in September: 28°C
The month with the highest average low temperature is September (28°C).
The coldest month (with the lowest average low temperature) is March (26.2°C).
Average pressure in September
San Andrés, Colombia
- Average pressure in September: 1010.1mbar
The months with the highest atmospheric pressure are January and March (1012.7mbar).
The month with the lowest atmospheric pressure is October (1009.5mbar).
Average wind speed in September
San Andrés, Colombia
- Average wind speed in September: 17.5km/h
The windiest months (with the highest average wind speed) are July and December (28.5km/h).
The calmest month (with the lowest average wind speed) is September (17.5km/h).
Average humidity in September
San Andrés, Colombia
- Average humidity in September: 77%
The months with the highest relative humidity are June and July (81%).
The month with the lowest relative humidity is October (76%).
Average rainfall in September
San Andrés, Colombia
- Average rainfall in September: 124mm
The wettest month (with the highest rainfall) is October (232mm).
The driest month (with the least rainfall) is March (26mm).
Average rainfall days in September
San Andrés, Colombia
- Average rainfall days in September: 24.1 days
The month with the highest number of rainy days is December (27.5 days).
The month with the least rainy days is April (15.7 days).
Average sea temperature in September
San Andrés, Colombia
- Average sea temperature in September: 29.4°C
The best month for swimming (with the highest average sea temperature) is September (29.4°C).
The coldest month (with the lowest average sea temperature) is February (27°C).
Average daylight in September /
Average sunshine in September
San Andrés, Colombia
- 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 24min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is February (Average sunshine: 8h and 24min).
The month with the least sunshine is November (Average sunshine: 5h and 48min).
Average sunshine days in September
San Andrés, Colombia
- Average sunshine days in September: 4.9 days
The month with the most sunshine days is April (7.9 days).
The month with the least sunshine days is November (1.5 days).
Average UV index in September
San Andrés, Colombia
- Average UV index in September: 7
The months with the highest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
The months with the lowest UV index are January, February, March, April, May, June, July, August, September, October, November and December (UV index 7).
Average cloud cover in September
San Andrés, Colombia
- Average cloud cover in September: 40
The months with the most cloud cover are June and July (Cloud cover 50).
The month with the least cloud cover is February (Cloud cover 39).
Average visibility in September
San Andrés, Colombia
- Average visibility in September: 10km
The months with the highest visibility are January, February, March, April, May, June, July, August, September and December (10km).
The months with the lowest visibility are October and November (9km).
San Andrés, Colombia
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