Climate Overview
The climate in Kollam is hot. The average annual temperature is 28°C and approximately 2458mm of precipitation falls per year. May is the wettest month, receiving around 392mm of rainfall. Kollam sits near the equator, so seasonal temperature differences are minimal throughout the year.
Temperature
Kollam has relatively stable temperatures year-round, staying within a 5°C range. The warmest month is April, when average highs reach 31°C and the mean temperature sits around 29°C. August is the coolest month, with minimum temperatures around 26°C and an average of 27°C. Daily temperature variation is modest, with an average difference of 3°C between highs and lows.
Precipitation
Kollam is a very wet location, receiving approximately 2458mm of precipitation annually, which averages out to around 205mm per month. The wettest month is May, averaging 392mm of rainfall. June and July also tend to see above-average precipitation. The driest month is February, with just 17mm. That's 376mm 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
Kollam is mildly breezy, with an average annual wind speed of 18km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is July, averaging 22km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in November, with average winds dropping to 13km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 9km/h gap between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 17km/h in winter, 18km/h in spring, 21km/h in summer, 15km/h in autumn.
Seasons
87 days until Summer
It is currently spring in Kollam, which began on March 20, 2026. Kollam sits near the equator, so the traditional four-season cycle is less pronounced — temperatures remain relatively stable year-round. The warmest period peaks in April at around 31°C, while the coldest stretch bottoms out in August near 26°C. Summer is next, beginning on June 21, 2026 — 87 days from now.
Spring
Temperatures range from 27 to 31°C. Rainfall is heavy, totalling around 620mm across the season with a monthly average of 207mm. Winds are moderate at around 18km/h. An umbrella or waterproof jacket is advisable as spring showers are frequent.
Summer
Temperatures range from 26 to 29°C. Rainfall is heavy, totalling around 995mm across the season with a monthly average of 332mm. Winds are moderate at around 21km/h. Light, breathable clothing is ideal — perfect conditions for outdoor activities.
Autumn
Temperatures range from 26 to 29°C. Rainfall is heavy, totalling around 711mm across the season with a monthly average of 237mm. Winds are moderate at around 15km/h. A waterproof jacket and sturdy footwear are recommended as rain becomes more frequent.
Winter
Temperatures range from 26 to 30°C. Rainfall is relatively light, with around 132mm over the season and a monthly average of 44mm. Winds are moderate at around 17km/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 Kollam 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.
