Climate Overview
The climate in Ilopango International Airport is hot. The average annual temperature is 26°C and approximately 1678mm of precipitation falls per year. June is the wettest month, receiving around 355mm of rainfall. Ilopango International Airport is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: March, February, April. The coldest months are January, February, December, when temperatures can drop to 20°C.
Temperature
Ilopango International Airport sees moderate temperature variation throughout the year, ranging from 20°C to 35°C. The warmest month is March, when average highs reach 35°C and the mean temperature sits around 27°C. January is the coolest month, with minimum temperatures around 20°C and an average of 26°C. On average, daily temperatures fluctuate by about 11°C between overnight lows and afternoon highs.
Precipitation
Ilopango International Airport is a fairly wet location, receiving approximately 1678mm of precipitation annually, which averages out to around 140mm per month. The wettest month is June, averaging 355mm of rainfall. September and October also tend to see above-average precipitation. The driest month is January, with just 3mm. That's 352mm less than June, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.
Wind
Ilopango International Airport is relatively calm, with an average annual wind speed of 5km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 7km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 4km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 3km/h gap between the calmest and windiest months. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 7km/h in winter, 5km/h in spring, 4km/h in summer, 4km/h in autumn.
Seasons
87 days until Winter
It is currently autumn in Ilopango International Airport, which began on September 23, 2026. Ilopango International Airport is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in March at around 35°C, while the coldest stretch bottoms out in January near 20°C. Winter is next, beginning on December 21, 2026 (87 days from now).
Spring
Temperatures range from 22 to 35°C. Precipitation is moderate at around 287mm for the season, averaging 96mm per month. Winds are generally light, averaging 5km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 22 to 33°C. Rainfall is heavy, totalling around 745mm across the season with a monthly average of 248mm. Winds are generally light, averaging 4km/h. Light, breathable clothing is ideal. Perfect conditions for outdoor activities.
Autumn
Temperatures range from 21 to 32°C. Rainfall is heavy, totalling around 628mm across the season with a monthly average of 209mm. Winds are generally light, averaging 4km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 20 to 34°C. Precipitation is minimal, with only around 18mm for the entire season. Winds are generally light, averaging 7km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Monthly Climate Data
The table below shows monthly climate averages for Ilopango International Airport based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.
