Climate Insights for Tiruvannāmalai

The climate in Tiruvannāmalai is hot. The average annual temperature is 29°C and approximately 735mm of precipitation falls per year. July is the wettest month, receiving around 195mm of rainfall. Tiruvannāmalai is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: April, May, March. The coldest months are January, December, February, when temperatures can drop to 20°C.

Tiruvannāmalai sees moderate temperature variation throughout the year, ranging from 20°C to 38°C. April is the hottest month, with daytime highs reaching 38°C and an average of 32°C. January is the coolest month, with minimum temperatures around 20°C and an average of 24°C. On average, daily temperatures fluctuate by about 9°C between overnight lows and afternoon highs. The sharpest temperature change occurs between March and April, with a 3°C shift in average temperatures.

Tiruvannāmalai is a relatively dry area, receiving approximately 735mm of precipitation annually, which averages out to around 61mm per month. The wettest month is July, averaging 195mm of rainfall. June and May also tend to see above-average precipitation. The driest month is March, with just 1mm. That's 194mm 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.

Tiruvannāmalai is relatively calm, with an average annual wind speed of 2km/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 3km/h, though still comfortable for most outdoor activities. The calmest conditions occur in October, with average winds dropping to 2km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 1km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans.

It is currently summer in Tiruvannāmalai, which began on June 21, 2026. Tiruvannāmalai is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in April at around 38°C, while the coldest stretch bottoms out in January near 20°C. Autumn is next, beginning on September 23, 2026 — 63 days from now.

The best time to visit Tiruvannāmalai is during January and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 24°C with modest rainfall averaging 44mm per month. By contrast, April can be uncomfortably hot with temperatures reaching 38°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 Tiruvannāmalai 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.