Climate Overview
The climate in El Rosario is warm and mild. The average annual temperature is 24°C and approximately 673mm of precipitation falls per year. August is the wettest month, receiving around 211mm of rainfall. El Rosario is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: July, June, August. The coldest months are January, February, December, when temperatures can drop to 13°C.
Temperature
El Rosario sees moderate temperature variation throughout the year, ranging from 13°C to 32°C. The warmest month is July, when average highs reach 32°C and the mean temperature sits around 28°C. January is the coolest month, with minimum temperatures around 13°C and an average of 19°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between November and December, with a 3°C shift in average temperatures.
Precipitation
El Rosario is a relatively dry area, receiving approximately 673mm of precipitation annually, which averages out to around 56mm per month. The wettest month is August, averaging 211mm of rainfall. September and July also tend to see above-average precipitation. The driest month is May, with just 1mm. That's 210mm 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 mildly breezy, with an average annual wind speed of 12km/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 15km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, with average winds dropping to 11km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 4km/h between the calmest and windiest months.
Seasons
87 days until Summer
It is currently spring in El Rosario, which began on March 20, 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 July at around 32°C, while the coldest stretch bottoms out in January near 13°C. Summer is next, beginning on June 21, 2026 — 87 days from now.
Spring
Temperatures range from 15 to 31°C. Precipitation is minimal, with only around 8mm for the entire season. Winds are generally light, averaging 14km/h. Light layers work well as temperatures warm through the season — a great time to be outdoors.
Summer
Temperatures range from 24 to 32°C. Rainfall is heavy, totalling around 381mm across the season with a monthly average of 127mm. Winds are generally light, averaging 13km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 18 to 31°C. Precipitation is moderate at around 238mm for the season, averaging 79mm per month. Winds are generally light, averaging 11km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 13 to 27°C. Precipitation is minimal, with only around 46mm for the entire season. Winds are generally light, averaging 12km/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 13mm per month. By contrast, July 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.
