Direct Answer
Hong Kong’s average annual temperature ranges from 20–30°C, with little variation in clothing across seasons. The key challenges are high humidity (annual average 80–90%) and the typhoon season (September–October). Be prepared with a raincoat and quick-dry clothing.
Why Is Hong Kong So Humid and Stuffy?
Geographic location: Hong Kong sits on the northern coast of the South China Sea, with a subtropical oceanic climate.
Climate characteristics:
- High temperatures and heavy rain: Average annual temperature is 22°C, but summer (June–August) can reach 30–35°C.
- High humidity: Average annual relative humidity is 80–90%, making it one of the most humid cities in China.
- Significant monsoons: Dry and cool in winter, hot and stuffy in summer, with short spring and autumn transitions.
- Frequent typhoons: The typhoon season runs from September to October, with severe impacts.
Comparison with other cities:
- 20 times more humid than Beijing (Beijing’s average annual humidity is 45%).
- More humid than Shanghai (Shanghai’s average annual humidity is 70%).
- Slightly drier than Guangzhou (Guangzhou’s average annual humidity is 75%).
This high humidity means clothes can easily get moldy, skin can become oily, hair can get greasy, and electronics can malfunction. New students need to adapt quickly.
Seasonal Clothing Guide
Winter (November–February): Temperature 15–20°C
Climate characteristics:
- The coolest period, but still not cold (by the time it’s coldest inland, Hong Kong is already warming up).
- Dry weather, the most comfortable season of the year.
- Occasional cold snaps can drop temperatures below 10°C.
- Almost no rain, with plenty of sunshine.
Clothing suggestions:
- Base: Long-sleeved T-shirts, thin jeans.
- Outerwear: A light jacket or hoodie (often not needed).
- For those who feel the cold: A light down jacket or wool coat.
- Footwear: Sneakers or casual shoes are sufficient; no snow boots needed.
Practical tips:
- You don’t need heavy winter clothes; two light jackets are enough for the entire winter.
- Classrooms in Hong Kong are very cold in winter (18–20°C), so long sleeves are essential.
- You might need an extra layer outdoors in the evening, but you can take it off during the day.
Common mistake: New students often bring heavy down jackets, only to find they are completely unnecessary, wasting luggage space.
Spring (March–May): Temperature 20–28°C
Climate characteristics:
- Temperatures rise quickly, from 15°C to 28°C.
- Humidity increases significantly, becoming stuffy.
- April–May is the prelude to the “rainy season,” with intermittent rain.
- Haze can occur (blown in from inland areas).
Clothing suggestions:
- Base: T-shirts, short sleeves, thin long pants (cotton or linen for sweat absorption).
- Outerwear: A thin long-sleeved shirt (for sun protection when the sun is strong).
- Footwear: Breathable sneakers, sandals, or flip-flops.
- Accessories: Hat or umbrella (for sun protection).
Practical tips:
- Rain becomes frequent in late spring (May); always carry a folding umbrella.
- Cotton T-shirts absorb sweat; switch to quick-dry clothing (polyester).
- Jackets or long-sleeved shirts can protect from the sun; locals often wear a long-sleeved T-shirt under a short-sleeved one.
Summer (June–August): Temperature 28–35°C
Climate characteristics:
- The hottest and most stuffy season.
- June is the rainy season (mid-June to mid-July), with continuous rain.
- July–August is scorching, with extremely strong UV rays.
- Highest humidity (90–95%), risk of heatstroke.
Clothing suggestions:
- Base: Short-sleeved T-shirts, shorts or skirts, thin cotton or linen dresses.
- Materials: Quick-dry fabrics (non-absorbent) or pure cotton (absorbent).
- Colors: Light colors (absorb less heat), avoid black.
- Footwear: Flip-flops, sandals, mesh sneakers (breathable).
- Essentials: Sunscreen SPF50+, umbrella, hat.
Wardrobe setup:
- 5–7 short-sleeved T-shirts or tank tops.
- 3–4 pairs of shorts or skirts.
- 1–2 thin long-sleeved shirts (for sun protection).
- 1–2 light jackets (for cold classrooms).
- Comfortable sandals.
Practical tips:
- Classroom air conditioning is very cold (18–20°C); bring a thin long-sleeved shirt.
- Locals often wear quick-dry clothing (Nike, Adidas sportswear) in summer, which is more comfortable than cotton T-shirts.
- Clothes can easily get moldy during the rainy season; sun-dry them often or use desiccant.
- Knee-length skirts are popular in Hong Kong, being both cool and sun-protective.
Heatstroke prevention:
- Carry a water bottle when going out.
- Avoid outdoor activities between 12 PM and 3 PM.
- Cold drinks are plentiful, but don’t overindulge; they can cause stomach upset.
Autumn (September–October): Temperature 25–30°C
Climate characteristics:
- Still hot in early September, cooling down from mid-September.
- Typhoon season (September–October), with frequent strong typhoons.
- Becomes dry and pleasant from mid-October, with clear skies.
- Large temperature difference between morning and evening (20–30°C).
Clothing suggestions:
- Base: Short-sleeved T-shirts, long pants.
- Outerwear: 1–2 light jackets or hoodies (needed in the evening).
- Footwear: Waterproof sneakers or waterproof sandals (for typhoon rain).
Typhoon season dressing tips:
- Avoid long skirts or loose clothing (easily blown by the wind).
- Wear long pants and fitted clothing (for ease of movement).
- Women should avoid high heels (slippery).
- Have a windproof and waterproof jacket ready.
Practical tips:
- The MTR may suspend service during typhoons; have an alternative travel plan near your accommodation.
- Locals may wear thick jackets in autumn (even at 25°C), which is more psychological; new students don’t need to follow suit.
- Late October has the most comfortable weather, the best of the year.
Detailed Guide to the Rainy Season and Typhoon Season
Rainy Season (Mid-June to Mid-July)
Weather characteristics:
- Continuous rain with occasional clear spells.
- Extremely high humidity (over 95%).
- Not too hot, but uncomfortably stuffy.
- Clothes are very prone to mold.
Daily coping strategies:
- Anti-mold: Sun-dry clothes for at least 2 hours daily, or use desiccant.
- Anti-dampness: Place a dehumidifier or charcoal in your dorm, and use mothballs in your wardrobe.
- Laundry: Wash and dry clothes immediately; don’t leave them overnight (they will smell).
- Shoes: Fill shoes with old newspaper or desiccant to prevent mold.
Clothing choices:
- Wear quick-dry clothing (cotton and linen absorb sweat but dry slowly).
- Have a waterproof jacket and waterproof bag ready.
- Rain boots or waterproof sandals (Hong Kong streets often have puddles).
- Towel and quick-dry headband (hair gets wet easily).
Tips:
- Use a dryer (in your dorm or at a coin laundry) to dry clothes quickly.
- Watsons in Hong Kong sells affordable mothballs and desiccant (20–30 HKD per pack).
- Shower more often during the rainy season (your body sweats easily and can develop heat rash).
Typhoon Season (Mid-September to Mid-October)
Typhoon levels and their impact:
1、 T1 · Light wind · MTR and buses run normally · Go about your day as usual 2、 T3 · Moderate wind · MTR reduces service, buses may stop · Head home early 3、 T8 · Strong wind · MTR and buses stop, schools close · Stay home 4、 T9/T10 · Super typhoon · City-wide paralysis, extremely dangerous · Stay indoors, do not go out
Preparations before a T8 signal:
- Stock up on drinking water and canned food (in case of power and water outages).
- Charge your phone, power bank, and emergency flashlight.
- Ensure your route home is safe (there may be no transport during the typhoon).
- Let your family know you are safely home.
What to wear during a typhoon:
- Long pants and sneakers (for running to safety).
- Fitted jacket (windproof).
- Avoid long skirts or loose clothing that can be blown by the wind.
- Women should not wear high heels (risk of falling).
Taboos for going out during a typhoon:
- Do not go out when a T8 signal is hoisted; there have been cases of people being injured by strong winds.
- Stay away from glass windows (they may shatter).
- Avoid standing under large trees (they may fall and cause injury).
Sun Protection, Skincare, and Adapting to Humidity
Essential Sun Protection for Students in Hong Kong
Hong Kong’s UV intensity is much higher than in many other regions (due to its low latitude and strong sunlight):
Sun protection essentials:
- Sunscreen SPF50+ PA++++: 20–80 HKD per bottle (available at Watsons or Japanese brands).
- Umbrella: 80–150 HKD (commonly used by locals, good value).
- Sun hat: 50–100 HKD.
- Sun-protective clothing/pants: 200–400 HKD.
- Sunglasses: 100–400 HKD.
Sun protection tips:
- Reapply sunscreen every 2 hours (especially after exercise or sweating).
- The daily UV index in Hong Kong is usually 8–10 (extremely high); you cannot skip protection.
- Apply sunscreen 15 minutes before going out (to allow it to form a protective layer).
Skincare in Humid and Hot Weather
Skin problems:
- Excessive oil production, leading to acne.
- Enlarged pores (caused by humidity and heat).
- Increased blackheads and whiteheads.
Skincare suggestions:
- Use lightweight, oil-control skincare products (avoid heavy lotions).
- Wash your face 3–4 times a day (morning, noon, evening, after exercise).
- Choose a gentle cleanser or oil-control face wash.
- Watsons in Hong Kong offers good value oil-control products (100–200 HKD).
Scalp care:
- High humidity can make your scalp oily; consider washing your hair daily.
- Use a refreshing shampoo (avoid too much conditioner).
- Dry your hair thoroughly (a damp environment can promote fungal growth).
Places to Buy Clothes in Hong Kong and Prices
1、 AEON · Low · Fast fashion, sportswear · ★★★★★ 2、 H&M · Low to mid · Trendy clothing · ★★★★ 3、 Zara · Mid · Designer styles · ★★★ 4、 Uniqlo · Mid · Basics, quick-dry clothing · ★★★★ 5、 Local brands · Mid to high · Hong Kong style, designer · ★★★ 6、 Street stalls · Low · Wholesale clothing · ★★
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