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
Weather in September
Temperature
September begins with an average high-temperature of a still warm 26°C (78.8°F), reflecting close similarity to the preceding month. During September, La Unión records a consistent average nighttime temperature of 17.5°C (63.5°F).Humidity
In La Unión, the average relative humidity in September is 90%.Rainfall
September is the month with the most rainfall in La Unión. Rain falls for 29.2 days and accumulates 261mm (10.28") of precipitation.Daylight
In September, the average length of the day in La Unión is 12h and 13min.On the first day of September in La Unión, Guatemala, sunrise is at 05:44 and sunset at 18:08. On the last day of the month, sunrise is at 05:46 and sunset at 17:46 CST.
Sunshine
The average sunshine in September in La Unión is 6.7h.UV index
In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the maximum UV index of 5 suggests these recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. The most potent solar radiation is around mid-day, so one should minimize exposure to direct sunlight during this period. Experience reduced UV exposure by about half when donning a wide-brim hat.
Frequently asked questions
What is the average September temperature in La Unión?
What is the average humidity in September in La Unión?
What is the rainiest month in La Unión?
How much does it rain in La Unión in September?
How many hours of daylight does La Unión have in September?
When is the sunrise / sunset in September in La Unión?
How many hours of sunshine does La Unión have in September?
How high is the UV index in September in La Unión?
Average temperature in September
La Unión, Guatemala
- Average high temperature in September: 26°C
The warmest month (with the highest average high temperature) is April (28.8°C).
The month with the lowest average high temperature is January (21.8°C).
- Average low temperature in September: 17.5°C
The month with the highest average low temperature is May (18.6°C).
The coldest month (with the lowest average low temperature) is January (14.1°C).
Average pressure in September
La Unión, Guatemala
- Average pressure in September: 1012.2mbar
The month with the highest atmospheric pressure is January (1015.9mbar).
The months with the lowest atmospheric pressure are May and September (1012.2mbar).
Average wind speed in September
La Unión, Guatemala
- Average wind speed in September: 4.4km/h
The windiest month (with the highest average wind speed) is January (7.8km/h).
The calmest month (with the lowest average wind speed) is September (4.4km/h).
Average humidity in September
La Unión, Guatemala
- Average humidity in September: 90%
The months with the highest relative humidity are October and November (91%).
The month with the lowest relative humidity is April (76%).
Average rainfall in September
La Unión, Guatemala
- Average rainfall in September: 261mm
The wettest month (with the highest rainfall) is September (261mm).
The driest month (with the least rainfall) is February (32mm).
Average rainfall days in September
La Unión, Guatemala
- Average rainfall days in September: 29.2 days
The month with the highest number of rainy days is September (29.2 days).
The month with the least rainy days is February (19.1 days).
Average daylight in September /
Average sunshine in September
La Unión, Guatemala
- 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: 6h and 4min
The month with the most sunshine is April (Average sunshine: 10h and 18min).
The month with the least sunshine is November (Average sunshine: 5h and 0min).
Average sunshine days in September
La Unión, Guatemala
- Average sunshine days in September: 0.7 days
The month with the most sunshine days is March (8.3 days).
The month with the least sunshine days is September (0.7 days).
Average UV index in September
La Unión, Guatemala
- Average UV index in September: 5
The months with the highest UV index are March, April, May and June (UV index 6).
The months with the lowest UV index are January, November and December (UV index 4).
Average cloud cover in September
La Unión, Guatemala
- Average cloud cover in September: 66
The month with the most cloud cover is November (Cloud cover 75).
The month with the least cloud cover is April (Cloud cover 42).
Average visibility in September
La Unión, Guatemala
- Average visibility in September: 6km
The month with the highest visibility is April (8km).
The months with the lowest visibility are October, November and December (5km).
La Unión, Guatemala
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