Climate Overview
The climate in Acatlán de Osorio is warm and mild. The average annual temperature is 23°C and approximately 1004mm of precipitation falls per year. September is the wettest month, receiving around 266mm of rainfall. Acatlán de Osorio is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: April, May, March. The coldest months are January, December, February, when temperatures can drop to 12°C.
Temperature
Temperatures in Acatlán de Osorio vary considerably across the year, with a 23°C difference between the coldest and warmest months. The warmest month is April, when average highs reach 35°C and the mean temperature sits around 26°C. January is the coolest month, with minimum temperatures around 12°C and an average of 20°C. On average, daily temperatures fluctuate by about 15°C between overnight lows and afternoon highs. The sharpest temperature change occurs between January and February, with a 2°C shift in average temperatures.
Precipitation
Acatlán de Osorio is a moderately rainy area, receiving approximately 1004mm of precipitation annually, which averages out to around 84mm per month. The wettest month is September, averaging 266mm of rainfall. August and June also tend to see above-average precipitation. The driest month is December, with just 1mm. That's 265mm 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
Acatlán de Osorio is relatively calm, with an average annual wind speed of 2km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is February, averaging 2km/h, though still comfortable for most outdoor activities. The calmest conditions occur in September, 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
92 days until Autumn
It is currently summer in Acatlán de Osorio, which began on June 21, 2026. Acatlán de Osorio 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 April at around 35°C, while the coldest stretch bottoms out in January near 12°C. Autumn is next, beginning on September 23, 2026 — 92 days from now.
Spring
Temperatures range from 16 to 35°C. Rainfall is relatively light, with around 89mm over the season and a monthly average of 30mm. 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 18 to 31°C. Rainfall is heavy, totalling around 540mm across the season with a monthly average of 180mm. Winds are generally light, averaging 1km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 15 to 31°C. Rainfall is heavy, totalling around 363mm across the season with a monthly average of 121mm. Winds are generally light, averaging 2km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 12 to 31°C. Precipitation is minimal, with only around 12mm for the entire season. Winds are generally light, averaging 2km/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 Acatlán de Osorio is during January, February, March, October, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 22°C with modest rainfall averaging 20mm per month. By contrast, April can be uncomfortably hot with temperatures reaching 35°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 Acatlán de Osorio 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.
