Climate Overview
The climate in Achí is hot. The average annual temperature is 29°C and approximately 2617mm of precipitation falls per year. May is the wettest month, receiving around 362mm of rainfall. Achí sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Achí sees moderate temperature variation throughout the year, ranging from 25°C to 36°C. February is the hottest month, with daytime highs reaching 36°C and an average of 31°C. October is the coolest month, with minimum temperatures around 25°C and an average of 28°C. Daily temperature variation is modest, with an average difference of 7°C between highs and lows.
Precipitation
Achí is a very wet location, receiving approximately 2617mm of precipitation annually, which averages out to around 218mm per month. The wettest month is May, averaging 362mm of rainfall. June and August also tend to see above-average precipitation. The driest month is February, with just 8mm. That's 355mm less than May, 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
Achí 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 March, averaging 2km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, 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 Achí, which began on June 21, 2026. Achí sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in February at around 36°C, while the coldest stretch bottoms out in October near 25°C. Autumn is next, beginning on September 23, 2026 — 93 days from now.
Spring
Temperatures range from 26 to 35°C. Rainfall is heavy, totalling around 635mm across the season with a monthly average of 212mm. Winds are generally light, averaging 1km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 25 to 32°C. Rainfall is heavy, totalling around 1002mm across the season with a monthly average of 334mm. Winds are generally light, averaging 1km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 25 to 32°C. Rainfall is heavy, totalling around 836mm across the season with a monthly average of 279mm. Winds are generally light, averaging 1km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 25 to 36°C. Rainfall is relatively light, with around 143mm over the season and a monthly average of 48mm. Winds are generally light, averaging 1km/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 Achí 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.
