Climate Overview
The climate in El Rosario is warm and mild. The average annual temperature is 22°C and approximately 4362mm of precipitation falls per year. El Rosario receives a notable amount of rainfall throughout the year, including during its driest month. El Rosario sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
El Rosario sees moderate temperature variation throughout the year, ranging from 18°C to 30°C. The warmest month is August, when average highs reach 30°C and the mean temperature sits around 23°C. January is the coolest month, with minimum temperatures around 18°C and an average of 22°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs.
Precipitation
El Rosario is a very wet location, receiving approximately 4362mm of precipitation annually, which averages out to around 364mm per month. The wettest month is April, averaging 497mm of rainfall. May and December also tend to see above-average precipitation. The driest month is August, with just 159mm. That's 338mm less than April, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.
Wind
El Rosario is relatively calm, with an average annual wind speed of 7km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is September, averaging 7km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 6km/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.
Seasons
89 days until Summer
It is currently spring in El Rosario, which began on March 20, 2026. El Rosario sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in August at around 30°C, while the coldest stretch bottoms out in January near 18°C. Summer is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from 18 to 27°C. Rainfall is heavy, totalling around 1442mm across the season with a monthly average of 481mm. Winds are generally light, averaging 6km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 18 to 30°C. Rainfall is heavy, totalling around 697mm across the season with a monthly average of 232mm. Winds are generally light, averaging 7km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 18 to 29°C. Rainfall is heavy, totalling around 1022mm across the season with a monthly average of 341mm. Winds are generally light, averaging 7km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 18 to 27°C. Rainfall is heavy, totalling around 1200mm across the season with a monthly average of 400mm. Winds are generally light, averaging 7km/h. A light jacket or sweater is usually sufficient, though cooler evenings may call for an extra layer.
Monthly Climate Data
The table below shows monthly climate averages for El Rosario 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.
