Climate Overview
The climate in San Salvador is hot. The average annual temperature is 26°C and approximately 1705mm of precipitation falls per year. October is the wettest month, receiving around 322mm of rainfall. San Salvador 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, December, February, when temperatures can drop to 22°C.
Temperature
San Salvador has relatively stable temperatures year-round, staying within a 10°C range. The warmest month is March, when average highs reach 32°C and the mean temperature sits around 27°C. January is the coolest month, with minimum temperatures around 22°C and an average of 26°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows.
Precipitation
San Salvador is a fairly wet location, receiving approximately 1705mm of precipitation annually, which averages out to around 142mm per month. The wettest month is October, averaging 322mm of rainfall. September and May also tend to see above-average precipitation. The driest month is January, with just 2mm. That's 320mm less than October, 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
San Salvador is relatively calm, with an average annual wind speed of 2km/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 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 1km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2km/h gap between the calmest and windiest months.
Seasons
93 days until Autumn
It is currently summer in San Salvador, which began on June 21, 2026. San Salvador 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 32°C, while the coldest stretch bottoms out in January near 22°C. Autumn is next, beginning on September 23, 2026 — 93 days from now.
Spring
Temperatures range from 23 to 32°C. Rainfall is heavy, totalling around 361mm across the season with a monthly average of 120mm. Winds are generally light, averaging 2km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 24 to 31°C. Rainfall is heavy, totalling around 633mm across the season with a monthly average of 211mm. Winds are generally light, averaging 1km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 23 to 30°C. Rainfall is heavy, totalling around 696mm across the season with a monthly average of 232mm. Winds are generally light, averaging 2km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 22 to 32°C. Precipitation is minimal, with only around 16mm for the entire season. Winds are generally light, averaging 2km/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 San Salvador 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.
