Climate Overview
The climate in Tulcán is temperate. The average annual temperature is 13°C and approximately 4408mm of precipitation falls per year. Tulcán receives a notable amount of rainfall throughout the year, including during its driest month. Tulcán sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Tulcán has relatively stable temperatures year-round, staying within a 10°C range. January is the warmest month, though highs remain moderate at 19°C with a mean of 14°C. September is the coolest month, with minimum temperatures around 9°C and an average of 13°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows.
Precipitation
Tulcán is a very wet location, receiving approximately 4408mm of precipitation annually, which averages out to around 367mm per month. The wettest month is December, averaging 527mm of rainfall. January and May also tend to see above-average precipitation. The driest month is August, with just 207mm. That's 320mm less than December, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.
Wind
Tulcán 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 December, 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
51 days until Autumn
It is currently summer in Tulcán, which began on June 21, 2026. Tulcán sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in January at around 19°C, while the coldest stretch bottoms out in September near 9°C. Autumn is next, beginning on September 23, 2026 — 51 days from now.
Spring
Temperatures range from 10 to 18°C. Rainfall is heavy, totalling around 1224mm across the season with a monthly average of 408mm. Winds are generally light, averaging 1km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 9 to 17°C. Rainfall is heavy, totalling around 827mm across the season with a monthly average of 276mm. Winds are generally light, averaging 2km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from 9 to 18°C. Rainfall is heavy, totalling around 1060mm across the season with a monthly average of 353mm. Winds are generally light, averaging 1km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 9 to 19°C. Rainfall is heavy, totalling around 1297mm across the season with a monthly average of 432mm. 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 Tulcán 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.
