Climate Insights for Luján

The climate in Luján is temperate. The average annual temperature is 17°C and approximately 949mm of precipitation falls per year. April is the wettest month, receiving around 218mm of rainfall. Luján 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 June, July, August, when temperatures can drop to 5°C.

Temperatures in Luján vary considerably across the year, with a 25°C difference between the coldest and warmest months. The warmest month is February, when average highs reach 30°C and the mean temperature sits around 25°C. June is the coolest month, with minimum temperatures around 5°C and an average of 9°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 5°C shift in average temperatures.

Luján is a moderately rainy area, receiving approximately 949mm of precipitation annually, which averages out to around 79mm per month. The wettest month is April, averaging 218mm of rainfall. February and October also tend to see above-average precipitation. The driest month is August, with just 11mm. That's 207mm less than April, 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.

Luján is relatively calm, with an average annual wind speed of 4km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is October, averaging 4km/h, though still comfortable for most outdoor activities. The calmest conditions occur in February, with average winds dropping to 3km/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.

It is currently winter in Luján, which began on June 21, 2026. Luján 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 30°C, while the coldest stretch bottoms out in June near 5°C. Spring is next, beginning on September 23, 2026 — 63 days from now.

The best time to visit Luján is during January, March and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 50mm per month. By contrast, February can be uncomfortably hot with highs reaching 30°C, while June is the coldest period with lows dropping to 5°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Luján 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.