Weather in Munnar in December

Prime time. December is about as good as Munnar gets. Highs average 21 °C, lows 12.6 °C, and rain falls on 6 days — nothing in the month is working against you.

December ranks 3 of 12 in Munnar. Only January scores clearly higher, and the difference is small enough to be settled by price rather than weather.

Rain falls on only 6 days, so an itinerary with no wet-weather fallback is a reasonable risk. Nothing specialised needed — this is the month you pack for the trip rather than for the weather.

What the averages hide

Averages flatten a month, and this one hides a few things: it never really gets hot: not one day in an average December reaches 30 °C. Across the twenty years measured, the hottest December day reached 25.6 °C and the coldest night fell to 6.6 °C, and the wettest single day dropped 50 mm — roughly 128% of the month's rain in one day.

December is moderately variable: 2 mm in the driest year against 98 mm in the wettest, around an average of 39 mm. Roughly two Decembers in three land near that average, and the third does something else entirely.

Wind is light at 1.1 km/h, so the temperature on the page is close to the temperature on your skin, and humidity runs at 83%, high enough to notice on the warm days without dominating them.

How December sits in the year

Temperatures hold steady either side: 20.9 °C in November, 21 here, 22.8 in January. Nothing about the timing within the month matters much. Rain has already shifted: 13 days fewer than November had.

Daylight in December

Munnar sits close enough to the equator that daylight barely moves all year — 11.5 hours in December, against a range of just 1.2 hours across the whole calendar. Sunrise and sunset land at roughly the same time whenever you come.

An inland climate

Despite being inland, the year stays fairly even: 16.5 °C between the year's warmest afternoons and coldest nights. At 1470 m the air is thin enough to matter — sun that burns faster than the temperature suggests, and nights that cool off quickly.

How busy it gets

Peak season. Expect the highest prices of the year and to be booking well ahead.

Crowd levels are estimated from climate desirability and school-holiday calendars, not from visitor numbers.

December in Munnar versus nearby

If Munnar is one option among several, the nearby comparison is worth making. Teni is the weaker option in December — 7.5 °C warmer, 2 days more rain. Coimbatore is close enough to be a coin toss — 7.8 °C warmer, 1 day less rain.

So: December works, with January the better month by 8 points if the dates can move. If they cannot, nothing here should stop you booking.

Every month in Munnar

See all twelve months in Munnar, or where else to go in December.