Weather by Month

Trivandrum sits barely 8° north of the equator on India’s southwest coast, which makes its weather warm and wet year-round. Average temperatures stay between 26°C and 32°C every single month, and annual rainfall tops 1,800 mm, most of it dumped by the southwest monsoon between June and August. This is the capital of Kerala, standing a few kilometres inland from the Arabian Sea at Kovalam, so the ocean controls everything: days stay hot and humid, nights cool only marginally, and the sea temperature never drops below 27°C. For related planning, see our best time to visit Thiruvananthapuram guide. For related planning, see our things to do in Thiruvananthapuram guide.

Thiruvananthapuram Weather by Month: Temperature and Rainfall

• January: 23-32°C, about 20 mm rain. The coolest and driest month, with clear mornings and 9 hours of sunshine. Best beach weather of the year. See our where to stay in Thiruvananthapuram guide for more.
• February: 24-33°C, 25 mm rain. Staying dry and sunny, humidity drops slightly. Good month for the Kovalam beachfront and outdoor temples. See our Thiruvananthapuram travel tips guide for more.
• March: 25-33°C, 40 mm rain. Warm-up begins; occasional evening thunderstorm. Sea at 29°C is ideal for swimming.
• April: 26-33°C, 105 mm rain. Pre-monsoon showers start mid-month. Hottest-feeling month because humidity climbs sharply.
• May: 26-32°C, 200 mm rain. Frequent afternoon downpours as the southwest monsoon nears. Sky turns hazy.
• June: 25-30°C, 350 mm rain. Monsoon arrives around 1 June with heavy, sustained rain that can flood low roads.
• July: 24-29°C, 350 mm rain. Peak monsoon; relentless rain and overcast skies. Coolest temperatures of the year.
• August: 24-29°C, 280 mm rain. Monsoon gradually eases late in the month but stays wet.
• September: 25-30°C, 240 mm rain. Monsoon retreats; rain shifts to late-afternoon bursts. Humidity very high.
• October: 25-31°C, 270 mm rain. Northeast monsoon kicks in with intermittent heavy showers.
• November: 24-31°C, 180 mm rain. Showers taper off through the month; skies clear by late November.
• December: 23-31°C, 45 mm rain. Dry, sunny and comfortable. Peak tourist season begins around Christmas.

Thiruvananthapuram Weather by Month: Sunshine and Sea Temperature

Sunshine hours run from a low of about 4 per day in July to a high of 9 in January and February. The Arabian Sea off Kovalam stays between 27°C and 30°C all year, so swimming is possible in any month, though the sea gets rough and swimming flags go up during the June-August monsoon. The practical takeaway: visit from December to February for dry days and calm sea, and avoid June to August if you can’t handle heavy rain. For related planning, see our events and festivals in Thiruvananthapuram guide. For related planning, see our best neighborhoods in Thiruvananthapuram guide.

Thiruvananthapuram Weather by Month: What to Pack

• December to February: light cotton clothes, a light jacket for cool evenings, sunscreen, sunglasses.
• March to May: breathable fabrics, high-SPF sunscreen, an umbrella and a reusable water bottle, it gets very hot.
• June to September: a proper rain jacket or poncho, waterproof footwear, quick-dry clothes, mosquito repellent.
• October to November: a compact umbrella for passing showers plus normal warm-weather clothes.