What Himalayan Weather Does
Bhutan valleys swing 10 to 15 degrees between sun and shade, and 8 to 10 degrees between valley floor and 3,000 meter viewpoints. Paro at 2,235 meters sees 15 to 22 degrees in October afternoons and 2 to 5 degrees at night. Phobjikha at 2,900 meters sees minus 5 at January dawn. Punakha at 1,200 meters stays 5 degrees warmer than Thimphu year round. Rain concentrates June to August, with afternoon showers in shoulder months.
Baggage limits shape packing. International flights to Paro allow standard 23 kilogram bags. Domestic Paro to Bumthang flights limit to 20 kilograms checked and 5 kilograms cabin. Trek pony duffels limit to 12 kilograms per trekker. Pack for layering rather than bulk, with three interchangeable tops instead of one heavy jacket.
Layering Timeline Through a Day
Dress in four phases that you add and remove as altitude and sun change, rather than one fixed outfit.
- Phase 1, dawn start, 6 to 8 am. Base thermal, fleece mid-layer, insulated jacket, hat, and gloves. Valley frost is normal October to March. Tea houses and pass cafes are unheated, so keep the jacket on through breakfast.
- Phase 2, morning climb, 8 to 11 am. Shed the insulated jacket on ascents and keep the fleece tied for ridge wind. Sun hat and sunglasses go on by 9 am, since UV at 3,000 meters burns fast even in cool air. Apply sunscreen before the trailhead.
- Phase 3, midday sun, 11 am to 2 pm. Lightest layer on valley floors, with rain shell accessible in a side pocket. Punakha at midday needs only a shirt and sun cover in most months. Monastery visits add a modesty layer over shoulders and knees at each gate.
- Phase 4, afternoon cloud, 2 to 5 pm. Fleece back on as cloud builds over passes. Rain shell over everything in monsoon and shoulder showers. Dochula and Pele La crossings after 2 pm often need full layers with wind protection.
- Phase 5, evening lodge, 6 pm onward. Dry base layer, warm socks, and down or synthetic insulation in dining rooms. Farmstays and mid-range hotels heat sitting areas but not corridors. Hot water bottles go to beds in winter lodges.
- Phase 6, night and sleep. Minus 5 degree bag liner for treks, hotel heating request for town stays. Keep electronics and water bottles inside the sleeping area in winter camps to protect batteries and prevent freezing.
Season Checklists
| Season | Core additions | Temps valley |
|---|---|---|
| Oct-Nov peak | Insulated jacket, gloves | 2 to 20 C |
| Mar-Apr spring | Fleece, rain shell | 5 to 22 C |
| Jun-Aug monsoon | Rain shell, gaiters | 12 to 25 C |
| Dec-Feb winter | Down jacket, thermals | -5 to 15 C |
Footwear and Bags
- Broken-in waterproof boots for treks, trail shoes for valley trips
- Daypack 20 to 30 liters with rain cover
- Duffel 60 to 90 liters for pony or vehicle transfers
- Trekking poles with rubber tips for temple floors
- Dry bags in 5 and 10 liter sizes for electronics
Medicines and Documents Pouch
Carry prescriptions, altitude headache tablets after medical advice, rehydration salts, blister plasters, and a basic cold kit in a single pouch in the daypack. Keep passport copies, clearance letter printout, SDF receipts, and insurance details in a zip bag apart from originals. ATMs cluster in Paro and Thimphu and thin out eastward, so carry ngultrum cash for markets, tea stalls, and tips beyond the main towns.
Laundry and Repeat Wear Plan
Hotels return laundry in 24 hours in Paro and Thimphu, 48 hours in smaller valleys. Treks offer no laundry, so plan three full base-layer rotations for a 5 day walk. A 10 meter clothesline plus pegs covers hand washing on longer trips. Quick-dry synthetics beat cotton at every altitude, since valley sun dries a shirt in 3 hours and cotton needs twice that.
What Not to Bring
Skip drones, since visitor flights are banned. Skip large tripods for dzong interiors, where they are banned. Skip single-use plastic bottles where lodges provide filtered refills. Skip heavy cotton jeans for treks, since they dry slowly and chill legs on passes. One modest scarf covers temple dress needs for most travelers.
This guide was prepared by Priya Nair, who runs pre-trip briefings at the Kathmandu desk and checks seasonal packing returns.