September weather forecastLa Unión, Colombia
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in La Unión, Colombia, with temperature in the range of an average high of 23.5°C (74.3°F) and an average low of 12°C (53.6°F).Temperature
La Unión's entry into September measures an average high-temperature of a still warm 23.5°C (74.3°F), closely parallel to the preceding month. Nighttime temperature dips to a mean of 12°C (53.6°F) during September.Humidity
The months with the lowest humidity are August and September, with an average relative humidity of 75%.Rainfall
The months with the least rainfall are June and September Rain falls for 16.5 days and accumulates 75mm (2.95") of rain.Daylight
In La Unión, the average length of the day in September is 12h and 8min.On the first day of the month, sunrise is at 05:58 and sunset at 18:10. On the last day of September, sunrise is at 05:51 and sunset at 17:56 -05.
Sunshine
In September, the average sunshine is 10.4h.UV index
The months with the highest UV index are January through September and December, with an average maximum UV index of 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: An average UV index of 5 in September transforms into this advice:
Undertake precautions - Obligation exists to protect against skin and eye damage. For health reasons, it's advisable to reduce direct sun exposure during peak hours around midday. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
La Unión, Colombia
- Average high temperature in September: 23.5°C
The warmest month (with the highest average high temperature) is August (24°C).
The month with the lowest average high temperature is November (21.4°C).
- Average low temperature in September: 12°C
The month with the highest average low temperature is April (12.9°C).
The coldest month (with the lowest average low temperature) is January (11.7°C).
Average pressure in September
La Unión, Colombia
- Average pressure in September: 1013.5mbar
The months with the highest atmospheric pressure are June and July (1013.6mbar).
The month with the lowest atmospheric pressure is February (1012.5mbar).
Average wind speed in September
La Unión, Colombia
- Average wind speed in September: 2.9km/h
The windiest month (with the highest average wind speed) is July (3.4km/h).
The calmest months (with the lowest average wind speed) are March and April (2.7km/h).
Average humidity in September
La Unión, Colombia
- Average humidity in September: 75%
The month with the highest relative humidity is November (83%).
The months with the lowest relative humidity are August and September (75%).
Average rainfall in September
La Unión, Colombia
- Average rainfall in September: 75mm
The wettest month (with the highest rainfall) is April (258mm).
The driest months (with the least rainfall) are June and September (75mm).
Average rainfall days in September
La Unión, Colombia
- Average rainfall days in September: 16.5 days
The month with the highest number of rainy days is April (27.5 days).
The months with the least rainy days are June and July (16.3 days).
Average daylight in September /
Average sunshine in September
La Unión, Colombia
- Average daylight in September: 12h and 6min
The month with the longest days is June (Average daylight: 12h and 24min).
The month with the shortest days is December (Average daylight: 11h and 54min).
- Average sunshine in September: 10h and 24min
The month with the most sunshine is August (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 7h and 18min).
Average sunshine days in September
La Unión, Colombia
- Average sunshine days in September: 12.1 days
The month with the most sunshine days is July (13 days).
The months with the least sunshine days are April and November (1.5 days).
Average UV index in September
La Unión, Colombia
- Average UV index in September: 5
The months with the highest UV index are January, February, March, April, May, June, July, August, September and December (UV index 5).
The months with the lowest UV index are October and November (UV index 4).
Average cloud cover in September
La Unión, Colombia
- Average cloud cover in September: 35
The month with the most cloud cover is April (Cloud cover 50).
The months with the least cloud cover are January and August (Cloud cover 34).
Average visibility in September
La Unión, Colombia
- Average visibility in September: 8km
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October and December (8km).
The month with the lowest visibility is November (7km).
