Climate Overview
The climate in La Unión is cool. The average annual temperature is 7°C and approximately 1452mm of precipitation falls per year. La Unión receives a notable amount of rainfall throughout the year, including during its driest month. La Unión sits near the equator, so seasonal temperature differences are minimal throughout the year. Light snow can occur between January and December.
Temperature
La Unión sees moderate temperature variation throughout the year, ranging from 0°C to 14°C. November is the warmest month, though highs remain moderate at 14°C with a mean of 8°C. July is the coolest month, with minimum temperatures around 0°C and an average of 6°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs.
Precipitation
La Unión is a fairly wet location, receiving approximately 1452mm of precipitation annually, which averages out to around 121mm per month. The wettest month is February, averaging 207mm of rainfall. March and January also tend to see above-average precipitation. The driest month is July, with just 32mm. That's 174mm less than February, 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. Light snowfall can occur between January and December, totalling around 19cm annually. October is the snowiest month with approximately 4cm.
Wind
La Unión is relatively calm, with an average annual wind speed of 1km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is August, averaging 2km/h, though still comfortable for most outdoor activities. The calmest conditions occur in March, with average winds dropping to 1km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 1km/h between the calmest and windiest months.
Seasons
3 days until Winter
It is currently autumn in La Unión, which began on March 20, 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 November at around 14°C, while the coldest stretch bottoms out in July near 0°C. Winter is next, beginning on June 21, 2026 — 3 days from now.
Spring
Temperatures range from 2 to 14°C. Rainfall is heavy, totalling around 377mm across the season with a monthly average of 126mm. Winds are generally light, averaging 1km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 3 to 13°C. Rainfall is heavy, totalling around 584mm across the season with a monthly average of 195mm. Winds are generally light, averaging 1km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from 2 to 13°C. Rainfall is heavy, totalling around 381mm across the season with a monthly average of 127mm. Winds are generally light, averaging 1km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 0 to 13°C. Rainfall is relatively light, with around 110mm over the season and a monthly average of 37mm. Winds are generally light, averaging 1km/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 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.
