Climate Overview
The climate in Cartago is warm and mild. The average annual temperature is 19°C and approximately 4119mm of precipitation falls per year. Cartago receives a notable amount of rainfall throughout the year, including during its driest month. Cartago sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Cartago has relatively stable temperatures year-round, staying within a 10°C range. September is the warmest month, though highs remain moderate at 25°C with a mean of 19°C. September is the coolest month, with minimum temperatures around 15°C and an average of 19°C. Daily temperature variation is modest, with an average difference of 8°C between highs and lows.
Precipitation
Cartago is a very wet location, receiving approximately 4119mm of precipitation annually, which averages out to around 343mm per month. The wettest month is March, averaging 478mm of rainfall. April and December also tend to see above-average precipitation. The driest month is August, with just 159mm. That's 319mm less than March, the wettest month. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.
Wind
Cartago is relatively calm, with an average annual wind speed of 6km/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 7km/h, though still comfortable for most outdoor activities. The calmest conditions occur in May, with average winds dropping to 5km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 2km/h between the calmest and windiest months.
Seasons
89 days until Summer
It is currently spring in Cartago, which began on March 20, 2026. Cartago 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 25°C, while the coldest stretch bottoms out in September near 15°C. Summer is next, beginning on June 21, 2026 — 89 days from now.
Spring
Temperatures range from 15 to 23°C. Rainfall is heavy, totalling around 1314mm across the season with a monthly average of 438mm. Winds are generally light, averaging 6km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 15 to 25°C. Rainfall is heavy, totalling around 635mm across the season with a monthly average of 212mm. Winds are generally light, averaging 7km/h. Comfortable clothing with a light layer for cooler evenings is all you need.
Autumn
Temperatures range from 15 to 25°C. Rainfall is heavy, totalling around 979mm across the season with a monthly average of 326mm. Winds are generally light, averaging 6km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 15 to 23°C. Rainfall is heavy, totalling around 1191mm across the season with a monthly average of 397mm. Winds are generally light, averaging 6km/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 Cartago 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.
