El SalvadorThe weather in September in La Unión
It's hot in September in La Unión with an average temperature of 34°C. Temperatures this month range from a low of 33°C to a high of 35°C. At night, you can expect temperatures between 24°C and 25°C.
Looking for sun? September isn’t a good month to be in La Unión. The temperature is nice, but there’s too much chance of rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for La Unión, El Salvador. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 38°C in 2015, La Unión reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 25°C in 2022. The extreme nighttime temperatures ranged from a lowest recorded value of 20°C to a highest value of 29°C.
Rainfall amount
In September, there is an average of 389 mm of precipitation, spread over 29 days. The wind speed is around 3 Bft, mostly coming from the South.
Daily weather in September for La Unión
Click on any day in September to get detailed info about the usual weather on that day in La Unión. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| La Unión | New York | |
|---|---|---|
| Average temperature | 34°C | 27°C |
| Max. temperature | 35°C | 31°C |
| Min. temperature | 24°C | -5°C |
| Total precipitation | 389 mm | 57 mm |
| Rainy days | 29 days | 9 days |
Start of September
The month of September starts in La Unión with hot temps, averaging around 35°C during the day and nights around 25°C.
Mid September
By mid-September, daytime temps stay steady at around 35°C, with nights around 25°C. There’s a high chance of precipitation during this time.
End of September
By the end of September, the average daytime temperature in La Unión is around 34°C, while nighttime temps are about 25°C. There’s a significant chance of many days with precipitation.
UV index
The UV index is a maximum of 10 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
The hurricane season in La Unión runs from June to November.
Check out the climate of La Unión for all months and discover the best travel time
Temperature charts
These charts show the average temperatures in September in La Unión, El Salvador. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in La Unión
Temperature in September in La Unión over the years
Precipitation charts
These charts show the average amount of precipitation in September in La Unión, El Salvador. Precipitation is always measured as water, even when it falls as snow or hail The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Daily Precipitation in September in La Unión
Total precipitation in September in La Unión over the years
Daily UV index in September in La Unión
This chart shows the average daily UV index in September in La Unión, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Weather experiences in September in La Unión
Have you been to La Unión in September?
Share your weather experience in September in La Unión.
Average weather in La Unión by month
Click on a month below to see detailed weather info for La Unión. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.