Coonoor Temperature by Month

Coonoor in Tamil Nadu, India enjoys a stable climate, with daytime temperatures staying close to 28°C (82°F) throughout the year. Explore the full monthly breakdown below.

The climate in Coonoor remains fairly constant, offering comfortable temperatures throughout the year. Maximum daytime temperatures reach a very warm 31°C (88°F) in April, dropping to a comfortable 26°C (79°F) in December. Nighttime lows stay between 21°C (70°F) and 16°C (61°F).

The chart below illustrates the average maximum day and minimum night temperatures in Coonoor by month:

The coldest point of the day usually falls between 4 AM and 6 AM, with temperatures peaking around 3 PM.

The chart below shows the average temperature throughout the year:

Coonoor's average annual maximum temperature is 28°C (82°F). To put that in context, here's how it compares to a few well-known destinations:

Athens, Greece sits at 23°C (73°F) on average, with hot dry summers and mild winters characteristic of the Mediterranean.

Reykjavík, Iceland averages 9°C (48°F) a year, mild summers by Icelandic standards, but cold winters and frequent wind.

Seoul, South Korea averages 18°C (64°F) a year, with four clear seasons, cold winters, and hot humid summers.

Melbourne, Australia averages 20°C (68°F) annually, known for unpredictable weather, with four seasons sometimes happening in one day.

Temperature alone doesn't tell the whole story, humidity plays a big role in how warm or cold it actually feels. High humidity in summer makes the heat feel more intense, particularly once temperatures climb above 25°C. In winter, the same humidity can make cold air feel sharper than the thermometer suggests.

In Coonoor, December is the coolest month, with average highs of 26°C (79°F) and humidity around 53%, considered moderate. In April, the warmest month, temperatures average 31°C (88°F) with 42% humidity, conditions that feel moderate. For a full picture, see our humidity page.

Climate temperature data is typically calculated as a 30-year average. This smooths out year-to-year variability and gives a more reliable picture of what a place is actually like, rather than what happened in any single unusual year.

The readings come from a range of sources, land-based weather stations, ocean buoys, ships, and satellites. That data is collected by weather services around the world, then pooled, quality-checked, and averaged to produce the climate records you see here.

For cities and regions with significant elevation, altitude is one of the biggest factors shaping local temperatures. As a rule of thumb, temperatures fall by around 6°C for every 1,000 metres gained, so a city at 2,000 metres will typically be around 12°C cooler than a city at sea level in the same region. Higher ground also tends to see more dramatic day-to-night temperature swings, since thinner air loses heat faster after sunset.

For more on Coonoor's weather, including monthly rainfall, sunshine hours, and humidity, visit our Coonoor climate page.