Climate Insights for Idukki

The climate in Idukki is warm and mild. The average annual temperature is 24°C and approximately 3108mm of precipitation falls per year. July is the wettest month, receiving around 470mm of rainfall. Idukki sits near the equator, so seasonal temperature differences are minimal throughout the year.

Idukki sees moderate temperature variation throughout the year, ranging from 19°C to 32°C. The warmest month is March, when average highs reach 32°C and the mean temperature sits around 26°C. January is the coolest month, with minimum temperatures around 19°C and an average of 23°C. Daily temperature variation is modest, with an average difference of 7°C between highs and lows.

Idukki is a very wet location, receiving approximately 3108mm of precipitation annually, which averages out to around 259mm per month. The wettest month is July, averaging 470mm of rainfall. August and May also tend to see above-average precipitation. The driest month is February, with just 22mm. That's 448mm less than July, 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.

Idukki is relatively calm, with an average annual wind speed of 5km/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 9km/h, though still comfortable for most outdoor activities. The calmest conditions occur in April, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 6km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans. Wind tends to pick up during the summer months. The seasonal averages are 5km/h in winter, 4km/h in spring, 8km/h in summer, 5km/h in autumn.

It is currently summer in Idukki, which began on June 21, 2026. Idukki sits near the equator, so the traditional four-season cycle is less pronounced. Temperatures remain relatively stable year-round. The warmest period peaks in March at around 32°C, while the coldest stretch bottoms out in January near 19°C. Autumn is next, beginning on September 23, 2026 (2 days from now).

The best time to visit Idukki is during January and February, when the weather is most comfortable for travellers. During these months, average temperatures hover around 24°C with modest rainfall averaging 39mm per month. By contrast, March can be uncomfortably hot with temperatures reaching 32°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Idukki 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.