Climate Insights for La Unión

The climate in La Unión is cool. The average annual temperature is 4°C and approximately 382mm of precipitation falls per year. December is the wettest month, receiving around 33mm of rainfall. La Unión sits near the equator, so seasonal temperature differences are minimal throughout the year. Light snow can occur between April and July.

La Unión has relatively stable temperatures year-round, staying within a 6°C range. December is the warmest month, though highs remain moderate at 6°C with a mean of 6°C. June is the coolest month, with minimum temperatures around 0°C and an average of 2°C. Daily temperature variation is modest, with an average difference of 2°C between highs and lows.

La Unión is a quite dry location, receiving approximately 382mm of precipitation annually, which averages out to around 32mm per month. The wettest month is January, averaging 33mm of rainfall. February and March also tend to see above-average precipitation. The driest month is May, with just 24mm. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around. Light snowfall can occur between April and July, totalling around 39cm annually. July is the snowiest month with approximately 16cm.

La Unión is relatively calm, with an average annual wind speed of 10km/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 16km/h, though still comfortable for most outdoor activities. The calmest conditions occur in August, with average winds dropping to 5km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 11km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 12km/h in winter, 11km/h in spring, 6km/h in summer, 9km/h in autumn.

It is currently summer in La Unión, which began on June 21, 2026. La Unión sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in December at around 6°C, while the coldest stretch bottoms out in June near 0°C. Autumn is next, beginning on September 23, 2026 — 16 days from now.

The table below shows monthly climate averages for La Unión 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. Snow is measured in centimetres (cm) and reflects average monthly snowfall accumulation. 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.