Climate Insights for Mariano Moreno

The climate in Mariano Moreno is temperate. The average annual temperature is 10°C and approximately 440mm of precipitation falls per year. June is the wettest month, receiving around 96mm of rainfall. Mariano Moreno 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: January, February, December. The coldest months are July, August, June, when temperatures can drop to -2°C. Snowfall occurs from April to November, with around 69cm accumulating over the season.

Temperatures in Mariano Moreno vary considerably across the year, with a 30°C difference between the coldest and warmest months. The warmest month is January, when average highs reach 28°C and the mean temperature sits around 19°C. The coldest month is July, when overnight lows fall to -2°C and the daily average is 2°C. On average, daily temperatures fluctuate by about 13°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 5°C shift in average temperatures.

Mariano Moreno is a relatively dry area, receiving approximately 440mm of precipitation annually, which averages out to around 37mm per month. The wettest month is June, averaging 96mm of rainfall. July and August also tend to see above-average precipitation. The driest month is March, with just 10mm. That's 86mm 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. Snowfall is a regular feature from April to November, with around 69cm accumulating over the season. July typically sees the most snow at around 21cm.

Mariano Moreno is moderately windy, with an average annual wind speed of 21km/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 25km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in May, with average winds dropping to 16km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 9km/h gap between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 19km/h in winter, 22km/h in spring, 23km/h in summer, 19km/h in autumn.

It is currently autumn in Mariano Moreno, which began on March 20, 2026. Mariano Moreno 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 January at around 28°C, while the coldest stretch bottoms out in July near -2°C. Winter is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Mariano Moreno is during January, February and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 18°C with modest rainfall averaging 19mm per month. By contrast, July can be quite cold with temperatures dropping to -2°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Mariano Moreno 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.