Direct answer: December in Dehradun is dry, bright and cold only at the edges of the day. Afternoons reach about 20°C, nights fall to around 6°C, and the whole month sees roughly 19 mm of rain across two days. It does not snow in the valley. Pack layers rather than heavy winter gear, and finish anything outdoors before the 5:20 pm sunset.
What the weather actually does in December
Dehradun sits at about 640 metres on the floor of the Doon Valley, and that altitude decides its winter. The valley turns properly cold after dark but never freezes the way the hill stations above it do.
Through December the average maximum sits near 20°C and the average minimum near 6°C. That fourteen degree gap is the thing most visitors underestimate. A midday walk in the sun feels like a pleasant spring afternoon anywhere in north India. The same spot at eight in the evening needs a jacket you actually fasten.
Rain is barely a factor. The month averages around 19 mm across roughly two rainy days, which makes December one of the clearest months of the year here. Mornings often open with valley mist that lifts by ten, and the reward is a clean view of the snow line along the Mussoorie ridge that summer haze hides completely.
Does it snow in Dehradun?
No. Dehradun city does not get snow in a normal winter. At 640 metres the valley floor stays comfortably above freezing even on the coldest December nights.
It is worth stating plainly, because it is the most common misunderstanding about a December trip here. What the month actually gives you is cold clear air, frost on the grass on the sharpest mornings, and snow visible on the ridges above the valley. To stand in it, you drive up.
Where the snow actually is, and how far
Three places are within a comfortable day trip, and they are not interchangeable:
• Mussoorie, about 2,000 metres and roughly 35 km up the hill. Snow usually begins from mid December and runs into February, with January the most reliable month. A December visit might catch it and might not.
• Dhanaulti, at 2,286 metres and about 74 km from Dehradun, which is around 30 km beyond Mussoorie. Being higher and far quieter, it tends to hold snow longer, and the deodar forest justifies the extra driving on its own.
• Chakrata, at 2,118 metres and 98 km out along the western edge of the valley. It is the least crowded of the three by a wide margin, and the slowest to reach.
One caution for all three: snow is weather, not a timetable. Anyone promising it on a particular date is guessing, and your chances improve every week you wait.
What to pack
The packing mistake runs both ways. Visitors from Delhi overpack for a Himalayan expedition and carry an unused down jacket around all week. Visitors flying in from Mumbai or Bengaluru underpack and buy a sweater on day two.
What actually works for a Dehradun December:
• Layers rather than bulk. A full sleeve top, a fleece or sweater, and a light windproof jacket will carry you from morning to night. You will shed the jacket by eleven and want it back by five.
• One properly warm layer if you are going up. Mussoorie, Dhanaulti and Chakrata run roughly ten degrees colder than the valley. A valley sweater is not a hill station sweater.
• Closed shoes with grip. Less for the city than for wet stone at Sahastradhara and for frost or old snow underfoot higher up.
• Moisturiser and lip balm. Dry winter air at this elevation works faster than people expect.
• Sunscreen, which sounds wrong for December and is not. The sun between eleven and three is strong enough to catch you out.
• A power bank. Cold drains phone batteries quickly, and the afternoon you most want photographs is the one where it dies at two.
What you can leave at home: snow boots, thermals unless you feel the cold badly, and an umbrella.
What stays open in December
Almost everything. December is not an off season here the way it is in the high Himalaya. The passes close. The valley carries on.
Rajaji National Park reopens for the season on 15 November and runs through to mid June, which puts December among the better months to visit. Winter safari slots run roughly 6:00 am to 9:30 am and 3:00 pm to 6:30 pm. Cold mornings mean better sightings and worse comfort, so dress for an open jeep rather than for the car park.
The Forest Research Institute keeps its museums open from about 9:30 am to 5:00 pm, entry around ₹25. The building and its lawns are the real attraction and both are at their best under a December sky.
Sahastradhara is open year round, but the sulphur pools are a summer pleasure. In December go for the ropeway and the limestone formations rather than the water.
Robber’s Cave is open and far more pleasant in December than in May, though the stream running through it is cold enough that most visitors stop at the entrance.
Mindrolling Monastery and the Great Stupa, Tapkeshwar Temple and Malsi Deer Park keep normal hours through winter.
The genuine December bonus is the winter line at Mussoorie, a false horizon that appears above the real one at sunset and is visible from only two places on earth, here and the Swiss Alps. The season runs October to February. Lal Tibba, George Everest and the Landour roads are the viewing points, and you want to be in position half an hour before the sun goes.
Planning around a 5:20 pm sunset
This is the detail that catches most people out. December holds the shortest days of the year, and in Dehradun that means sunrise near 7:00 am and sunset between 5:16 pm and 5:27 pm. The earliest sunset of the year falls on 2 December. The shortest day is 22 December, with about ten hours and eleven minutes of daylight.
Ten hours sounds generous until you plan a Mussoorie trip around it. Leave at eleven, arrive by noon, spend three unhurried hours, and you are driving down a hill road in the dark. It works, but it is not the drive anyone pictures when they plan it.
The fix is to start earlier than instinct suggests. Out by eight, back by five, and the day feels twice as long. Keep the evening for something stationary: a bonfire, a slow dinner, the sort of thing a December night in the valley is good at.
Getting there in December
Dehradun stays well connected through winter. Jolly Grant Airport runs all season, though December fog can delay the first departures. The Shatabdi and the overnight trains from Delhi keep normal schedules.
If you are driving from Delhi NCR, fog is the thing to plan around rather than distance. On the plains it is usually thickest between four and nine in the morning, so leaving at six to beat the traffic often means crawling through the worst of it while a nine o’clock start proves quicker.
Where this leaves you
December is one of the better months to be in Dehradun. It is dry when much of India is not, clear enough to actually see the mountains, mild enough by day to walk for hours and cold enough by night for everything people associate with a hill winter. The one thing it will not do is snow on you in the valley, and knowing that in advance is the difference between a good trip and a slightly deflated one.
If you would rather be in the valley than the town, the resorts off Chakrata Road sit about thirty minutes from the city centre with forest on one side and the Mussoorie ridge on the other. Pristine Woods is at Jagatpur near Sahaspur, roughly 45 minutes from the railway station and 75 minutes from Jolly Grant Airport. If you are weighing the valley against a hill station for the festive weeks, this comparison covers the trade-offs.
Frequently asked questions
Does it snow in Dehradun in December?
No. Dehradun city sits at about 640 metres and does not receive snow in a normal winter. Snow falls on the hills above it. Mussoorie, roughly 35 km away, usually sees its first from mid December, and Dhanaulti and Chakrata, both higher, hold it longer.
How cold does Dehradun get in December?
The average maximum is around 20°C and the average minimum around 6°C. Afternoons in the sun feel mild, while evenings and early mornings are genuinely cold. The fourteen degree swing between the two is what visitors usually underestimate.
Is December a good time to visit Dehradun?
Yes, particularly if you want clear weather. December averages only about 19 mm of rain across two days, and the mountain views are far better than in summer haze.
What should I pack for Dehradun in December?
Layers rather than heavy winter clothing: a full sleeve top, a fleece or sweater and a light windproof jacket. Add one properly warm layer if you are going up to Mussoorie, Dhanaulti or Chakrata, which run about ten degrees colder. Closed shoes, moisturiser, lip balm and sunscreen are worth the space.
What time does it get dark in Dehradun in December?
Sunset falls between about 5:16 pm and 5:27 pm through the month, the earliest of the year being 2 December. Sunrise is near 7:00 am. The shortest day is 22 December with about ten hours and eleven minutes of daylight, so outdoor plans need an earlier start than in summer.