Climate Overview
The climate in La Unión is temperate. The average annual temperature is 11°C and approximately 1389mm of precipitation falls per year. June is the wettest month, receiving around 238mm 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, August, June, 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 17°C. July is the coolest month, with minimum temperatures around 4°C and an average of 7°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 1389mm of precipitation annually, which averages out to around 116mm per month. The wettest month is June, averaging 238mm of rainfall. July and August also tend to see above-average precipitation. The driest month is January, with just 26mm. That's 212mm 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 mildly breezy, with an average annual wind speed of 16km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is December, averaging 17km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 14km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 3km/h between the calmest and windiest months.
Seasons
89 days until Winter
It is currently autumn in La Unión, which began on March 20, 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. Winter is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from 4 to 18°C. Precipitation is moderate at around 288mm for the season, averaging 96mm per month. Winds are moderate at around 16km/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 103mm over the season and a monthly average of 34mm. Winds are moderate at around 17km/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 328mm across the season with a monthly average of 109mm. Winds are generally light, averaging 15km/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 669mm across the season with a monthly average of 223mm. Winds are moderate at around 16km/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 26mm per month. By contrast, July can be quite cold with temperatures dropping to 4°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.
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.
