Climate Overview
The climate in La Unión is temperate. The average annual temperature is 11°C and approximately 1390mm of precipitation falls per year. June is the wettest month, receiving around 234mm of rainfall. La Unión is in the Southern Hemisphere. The seasons are reversed: summer runs from December to February, while winter falls between June and August. The summer months are: February, January, December. The coldest months are July, June, August, when temperatures can drop to 4°C.
Temperature
La Unión sees moderate temperature variation throughout the year, ranging from 4°C to 24°C. February is the warmest month, though highs remain moderate at 24°C with a mean of 16°C. July is the coolest month, with minimum temperatures around 4°C and an average of 6°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between February and March, with a 3°C shift in average temperatures.
Precipitation
La Unión is a fairly wet location, receiving approximately 1390mm of precipitation annually, which averages out to around 116mm per month. The wettest month is June, averaging 234mm of rainfall. July and August also tend to see above-average precipitation. The driest month is January, with just 30mm. That's 204mm 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
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 11km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 9km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2km/h between the calmest and windiest months.
Seasons
9 days until Spring
It is currently winter in La Unión, which began on June 21, 2026. La Unión is in the Southern Hemisphere, where the seasons are reversed: spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in February at around 24°C, while the coldest stretch bottoms out in July near 4°C. Spring is next, beginning on September 23, 2026 (9 days from now).
Spring
Temperatures range from 4 to 18°C. Rainfall is heavy, totalling around 304mm across the season with a monthly average of 101mm. Winds are generally light, averaging 10km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 9 to 24°C. Rainfall is relatively light, with around 112mm over the season and a monthly average of 37mm. Winds are generally light, averaging 11km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from 6 to 20°C. Rainfall is heavy, totalling around 341mm across the season with a monthly average of 114mm. Winds are generally light, averaging 9km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 4 to 11°C. Rainfall is heavy, totalling around 633mm across the season with a monthly average of 211mm. Winds are generally light, averaging 10km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Best Time to Visit
The best time to visit La Unión is during January and February, when the weather is most comfortable for travellers. During these months, average temperatures hover around 16°C with modest rainfall averaging 30mm per month. By contrast, July can be quite cold with temperatures dropping to 4°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.
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. 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.
