Winter in Sangti Valley can be very cold during mornings and evenings, so pack clothing that can be worn in layers. Thermal base layers, a fleece or sweater, a warm insulated jacket, gloves, a woollen cap and thick socks are useful from December to February.
Choose comfortable closed shoes with good grip, especially if you plan to walk around farmland, riverside areas or village paths. Frost can make some surfaces slippery in the morning, while a light wind- or water-resistant outer layer provides additional protection when conditions change.
For birdwatching, carry binoculars and a camera with a suitable zoom lens if available. A small daypack, reusable water bottle and a few snacks are also useful when spending longer periods outdoors. Avoid approaching birds simply to get a closer photograph.
Cold, dry winter weather can be uncomfortable for exposed skin, so pack lip balm, moisturiser and sunscreen. Sunglasses can also be useful on bright days, particularly if your wider itinerary continues towards snow-covered areas around Sela and Tawang.
Keep regular medicines, basic first-aid supplies, identification and Arunachal Pradesh permit documents accessible. A power bank and some cash can be useful when travelling through smaller settlements where digital connectivity or payment options may be inconsistent.
Heavy snow equipment is generally unnecessary for a Sangti-only trip because dependable snowfall in the valley is uncommon. However, travellers continuing to higher-altitude destinations such as Sela Pass or Tawang should pack separately for significantly colder, snowier and more demanding conditions.