Climate Overview
The climate in Valle de San Juan is hot. The average annual temperature is 27°C and approximately 1249mm of precipitation falls per year. November is the wettest month, receiving around 200mm of rainfall. Valle de San Juan sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Valle de San Juan sees moderate temperature variation throughout the year, ranging from 22°C to 35°C. The warmest month is September, when average highs reach 35°C and the mean temperature sits around 28°C. June is the coolest month, with minimum temperatures around 22°C and an average of 26°C. On average, daily temperatures fluctuate by about 11°C between overnight lows and afternoon highs.
Precipitation
Valle de San Juan is a fairly wet location, receiving approximately 1249mm of precipitation annually, which averages out to around 104mm per month. The wettest month is November, averaging 200mm of rainfall. April and March also tend to see above-average precipitation. The driest month is August, with just 28mm. That's 172mm less than November, 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
Valle de San Juan 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 August, averaging 2km/h, though still comfortable for most outdoor activities. The calmest conditions occur in November, 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
83 days until Autumn
It is currently summer in Valle de San Juan, which began on June 21, 2026. Valle de San Juan sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in September at around 35°C, while the coldest stretch bottoms out in June near 22°C. Autumn is next, beginning on September 23, 2026 — 83 days from now.
Spring
Temperatures range from 22 to 33°C. Rainfall is heavy, totalling around 453mm across the season with a monthly average of 151mm. Winds are generally light, averaging 1km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 22 to 34°C. Precipitation is moderate at around 154mm for the season, averaging 51mm per month. Winds are generally light, averaging 1km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 22 to 35°C. Rainfall is heavy, totalling around 362mm across the season with a monthly average of 121mm. Winds are generally light, averaging 1km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 22 to 34°C. Precipitation is moderate at around 281mm for the season, averaging 94mm per month. 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 Valle de San Juan 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.
