Climate Overview
The climate in El Grullo is warm and mild. The average annual temperature is 21°C and approximately 1062mm of precipitation falls per year. September is the wettest month, receiving around 255mm of rainfall. El Grullo is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: May, April, June. The coldest months are January, December, February, when temperatures can drop to 11°C.
Temperature
Temperatures in El Grullo vary considerably across the year, with a 21°C difference between the coldest and warmest months. The warmest month is May, when average highs reach 32°C and the mean temperature sits around 24°C. January is the coolest month, with minimum temperatures around 11°C and an average of 18°C. On average, daily temperatures fluctuate by about 13°C between overnight lows and afternoon highs.
Precipitation
El Grullo is a moderately rainy area, receiving approximately 1062mm of precipitation annually, which averages out to around 89mm per month. The wettest month is September, averaging 255mm of rainfall. August and July also tend to see above-average precipitation. The driest month is April, with just 2mm. That's 254mm 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
El Grullo is relatively calm, with an average annual wind speed of 1km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is April, averaging 2km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, 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
89 days until Autumn
It is currently summer in El Grullo, which began on June 21, 2026. El Grullo 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 11°C. Autumn is next, beginning on September 23, 2026 — 89 days from now.
Spring
Temperatures range from 13 to 32°C. Precipitation is minimal, with only around 38mm for the entire season. 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 17 to 30°C. Rainfall is heavy, totalling around 581mm across the season with a monthly average of 194mm. Winds are generally light, averaging 1km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 14 to 28°C. Rainfall is heavy, totalling around 401mm across the season with a monthly average of 134mm. Winds are generally light, averaging 1km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 11 to 28°C. Precipitation is minimal, with only around 43mm for the entire season. Winds are generally light, averaging 1km/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 Grullo is during January, February, March, April, May, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 16mm 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 El Grullo 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.
