Climate Overview
The climate in 18 de Marzo is warm and mild. The average annual temperature is 19°C and approximately 1322mm of precipitation falls per year. September is the wettest month, receiving around 292mm of rainfall. 18 de Marzo is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: April, May, March. The coldest months are January, December, February, when temperatures can drop to 9°C.
Temperature
18 de Marzo sees moderate temperature variation throughout the year, ranging from 9°C to 29°C. The warmest month is April, when average highs reach 29°C and the mean temperature sits around 21°C. January is the coolest month, with minimum temperatures around 9°C and an average of 16°C. On average, daily temperatures fluctuate by about 13°C between overnight lows and afternoon highs. The sharpest temperature change occurs between January and February, with a 2°C shift in average temperatures.
Precipitation
18 de Marzo is a fairly wet location, receiving approximately 1322mm of precipitation annually, which averages out to around 110mm per month. The wettest month is September, averaging 292mm of rainfall. June and August also tend to see above-average precipitation. The driest month is December, with just 6mm. That's 286mm less than September, 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
18 de Marzo is relatively calm, with an average annual wind speed of 2km/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 2km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 1km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.
Seasons
93 days until Autumn
It is currently summer in 18 de Marzo, which began on June 21, 2026. 18 de Marzo is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in April at around 29°C, while the coldest stretch bottoms out in January near 9°C. Autumn is next, beginning on September 23, 2026 — 93 days from now.
Spring
Temperatures range from 13 to 29°C. Precipitation is moderate at around 192mm for the season, averaging 64mm per month. Winds are generally light, averaging 2km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 15 to 26°C. Rainfall is heavy, totalling around 667mm across the season with a monthly average of 222mm. Winds are generally light, averaging 2km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from 12 to 25°C. Rainfall is heavy, totalling around 442mm across the season with a monthly average of 147mm. Winds are generally light, averaging 2km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 9 to 26°C. Precipitation is minimal, with only around 21mm for the entire season. Winds are generally light, averaging 2km/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 18 de Marzo is during January, February, March, April, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 18°C with modest rainfall averaging 22mm per month. 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 18 de Marzo 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.
