Climate Overview
The climate in El Rosario is warm and mild. The average annual temperature is 24°C and approximately 925mm of precipitation falls per year. August is the wettest month, receiving around 256mm of rainfall. El Rosario is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: May, June, July. The coldest months are January, February, March, when temperatures can drop to 12°C.
Temperature
El Rosario sees moderate temperature variation throughout the year, ranging from 12°C to 32°C. The warmest month is May, when average highs reach 32°C and the mean temperature sits around 25°C. January is the coolest month, with minimum temperatures around 12°C and an average of 19°C. On average, daily temperatures fluctuate by about 12°C between overnight lows and afternoon highs. The sharpest temperature change occurs between October and November, with a 3°C shift in average temperatures.
Precipitation
El Rosario is a moderately rainy area, receiving approximately 925mm of precipitation annually, which averages out to around 77mm per month. The wettest month is August, averaging 256mm of rainfall. September and July also tend to see above-average precipitation. The driest month is April, with just 0mm. That's 256mm less than August, 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
El Rosario is relatively calm, with an average annual wind speed of 5km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is May, averaging 6km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 4km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 2km/h gap between the calmest and windiest months.
Seasons
7 days until Autumn
It is currently summer in El Rosario, which began on June 21, 2026. El Rosario 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 May at around 32°C, while the coldest stretch bottoms out in January near 12°C. Autumn is next, beginning on September 23, 2026 (7 days from now).
Spring
Temperatures range from 14 to 32°C. Precipitation is minimal, with only around 6mm for the entire season. Winds are generally light, averaging 6km/h. Light layers work well as temperatures warm through the season. It is a great time to be outdoors.
Summer
Temperatures range from 23 to 32°C. Rainfall is heavy, totalling around 541mm across the season with a monthly average of 180mm. Winds are generally light, averaging 5km/h. Light, breathable clothing is ideal. Perfect conditions for outdoor activities.
Autumn
Temperatures range from 17 to 31°C. Rainfall is heavy, totalling around 330mm across the season with a monthly average of 110mm. Winds are generally light, averaging 4km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 12 to 28°C. Rainfall is relatively light, with around 49mm over the season and a monthly average of 16mm. Winds are generally light, averaging 5km/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 El Rosario is during January, February, March, April, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 11mm per month. By contrast, May can be uncomfortably hot with temperatures reaching 32°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 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.
