Weather in Bangkok 🇹🇭
Monthly weather averages & travel planning
May
Avg Temp
33°C
Rain Days
21 days
Sun Hours
10 hrs
Humidity
82%
Asia › 🇹🇭 Thailand › Bangkok
Updated: March 2026
Is May a Good Time to Visit Bangkok?
3/10
Avoid
May is a avoid time to visit Bangkok (3/10). With 10 daily sunshine hours and only 21 rain days, this month delivers genuinely reliable outdoor conditions, ranking it 5th sunniest of the year in Bangkok. May suits travellers visiting for indoor culture, food, and architecture rather than outdoor activities. Pack accordingly for 21 potential rain days. June offers a similar profile at lower hotel rates if dates are flexible. Watch out for prolonged rain stretches: with 21 wet days, a fully outdoor itinerary is risky. Build in museum days and covered market visits as contingency. Planning tips: most accommodation categories have availability, and last-minute deals are common. The quieter streets and shorter queues can make this a genuinely enjoyable time to visit for the right type of traveller. Budget-conscious visitors will find the best value of the year in this period.
vs April:35°C avg high
Visiting Bangkok in May means bold, midsummer heat topping 30°C. Factor in 21 potential rainy days and 82% average humidity when planning your daily activities.
33°C
91°F
Avg High
26°C
79°F
Avg Low
21 days
135 mm total
Rain Days
10h
per day avg
Sunshine
82%
Humid
Humidity
Temperature in Bangkok in May
The 7°C day-night temperature range is typical for continental climates: a light jacket in the morning that you shed by midday and need again after sunset. At 82% humidity, the 33°C daytime high feels 2-4°C warmer in practice: quick-dry fabrics and shade-seeking between noon and 3pm are the sensible response. UV index averages 8 this month, classed as high to very high. SPF 30+ sunscreen, a brim hat, and sunglasses are not optional between 10am and 4pm. Wind averages 15 km/h, light enough to be refreshing on warm days but noticeable in open coastal areas or elevated viewpoints. In Fahrenheit: 91°F average high, 79°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).
Temperature Trends
High
Low
Rainfall (mm)
0-20 mm21-50 mm51-100 mm100+ mm
What to Wear in Bangkok in May
Morning26°CBefore the day warms up
Afternoon33°CPeak daytime temperature
Evening29°CAfter sunset cools down
Packing for Bangkok in May means dressing for 33°C days and 26°C evenings. A lightweight linen or cotton shirt with loose-fit trousers or a sundress handles the 33°C daytime heat. Evening temperatures settle at 26°C, a modest 7°C drop that a light cardigan or denim jacket covers. For footwear, breathable walking sandals work for casual exploration, but closed-toe trainers are better for uneven surfaces in the historic centre. With 21 rain days expected, a compact travel umbrella is worth the bag space. A waterproof jacket is better than an umbrella if you plan full-day outdoor routes. For temple and religious site visits, carry a lightweight scarf or sarong to cover shoulders and knees, required at most major sites across the region. At 82% average humidity, quick-dry synthetic or bamboo fabrics dry overnight and stay comfortable longer than cotton.
Local tip: Loose-weave linen and moisture-wicking fabrics are the practical choice in Bangkok's heat and humidity. Many shopping centres run air conditioning at near-arctic levels, so a thin layer in your bag prevents discomfort indoors.
Events in Bangkok in May
May has no major festivals or public holidays in Bangkok, which is one of its practical advantages for independent travellers. Attractions run at lower capacity than during peak event periods, queues are shorter, and accommodation is easier to find without needing to book many months in advance. Local restaurants, markets, and transport operate at a relaxed pace, making this an ideal time for visitors who prefer a more authentic, unhurried experience of everyday city life rather than large crowds drawn in by a single major headline event.
What to Pack for Bangkok in May
Based on 33°C average highs and 21 rainy days
- Lightweight breathable clothing
- Linen or bamboo shirts for the hottest hours
- Sun hat with a wide brim
- UV-protective sunglasses
- Hydration bottle (at least 1 litre)
- Quick-dry travel towel
- Anti-chafe balm for long walking days
- Moisture-wicking synthetic fabrics for active days
- Compact folding umbrella
- Waterproof outer layer or packable rain jacket
- Quick-dry clothing that recovers fast after a shower
- SPF 30+ sunscreen
- Comfortable walking shoes (a second pair lets the first air out overnight)
- Universal travel adapter
- Small day pack for city exploration
- Reusable water bottle
Best Activities in Bangkok in May
- Early morning walk through Bangkok's historic market districtBest before 9amTemperatures are still manageable at 29°C before the midday heat builds
- Open-air rooftop dining at sunsetFrom 6pm onwardsThe 33°C daytime heat drops noticeably after sunset, making al fresco dining comfortable
- Waterfront promenade or harbour walkEarly morning or after 5pmSea breezes cut through the humidity, making coastal routes the most pleasant in heat
- Guided cycling tour of the old quarterFirst tour of the day (7-9am)The low-traffic window before tourist crowds and the cooler morning air make this the prime riding slot
- Spend a morning in the national or city art museumOpens at 10am; arrive earlyWith 21 rain days expected, having a full-day indoor plan is practical insurance
- Cooking class focused on regional cuisineHalf-day sessions run 10am-1pm or 3-6pmIndoor activity that fills a rainy half-day with genuine cultural content
- Visit covered historical sites: cathedral, palace, or bazaarAny time; most crowded middayRoofed monuments and covered markets provide exploration without weather exposure
- Visit the main botanical garden or city park at seasonal peakYear-round; best light in morningMay brings distinct seasonal changes to public green spaces worth exploring
- Seek out chilled local specialities: cold-brew tea, ice desserts, or chilled seafood at street-level stallsAny time; most atmospheric in evening marketsHot-weather street food culture peaks in May, with vendors setting up specifically for warm evenings
Why is Bangkok warm in May?
In May, Bangkok sits in the dry season corridor, as the ITCZ shifts away from the region and trade winds bring drier, more stable air. This produces reliably sunny days reaching 33°C, with lower humidity than the wet months. Overnight lows of 26°C offer a pleasant reprieve from the midday heat. Climate data: Open-Meteo ERA5 (1991–2020).
Sunshine Hours
The average number of hours per day with direct sunlight. Calculated from satellite measurements. Days with more than 7 hours of sunshine are ideal for outdoor activities. Under 3 hours means overcast conditions dominate.
UV Index
A scale from 0-11+ measuring ultraviolet radiation intensity. UV 0-2: Minimal risk. UV 3-5: Moderate, wear sunscreen. UV 6-7: High, hat and SPF 30+ essential. UV 8-10: Very High, limit midday exposure. UV 11+: Extreme, seek shade between 10am-4pm.
Rain Days
A rain day is counted when precipitation exceeds 0.1mm. This threshold captures even light drizzle. Unlike total rainfall in mm, rain days tells you how often you might need an umbrella, which is useful for planning outdoor activities.
Humidity
Relative humidity as a percentage. Below 40%: Dry, skin and throat may feel parched. 40-60%: Comfortable, ideal for most people. 60-80%: Sticky, light breathable fabrics recommended. Above 80%: Muggy, heat feels more intense; quick-dry clothing is essential.
Frequently Asked Questions
Bangkok in May
In May, Bangkok experiences average highs of 33°C (91°F) and lows of 26°C (79°F). Expect around 21 rainy days and 10 hours of sunshine per day, with humidity averaging 82%. The 7°C gap between daytime and overnight temperatures is worth planning around: light layers work for most visitors during the day, but an overshirt or cardigan handles the cooler evenings. UV index averages 8, so sun protection is advisable on clear days.
Bangkok typically sees 21 rainy days in May, with total precipitation of around 135mm. This is a notably wet period. A waterproof jacket or compact umbrella is essential, and it is worth building indoor alternatives into your daily itinerary for the inevitable rainy stretches. For context, the driest month in Bangkok typically sees 4-6 fewer rain days than May.
Pack lightweight, breathable clothing (linen or cotton), a wide-brim sun hat, SPF 50+ sunscreen, and a refillable water bottle for Bangkok in May. The 33°C daytime heat demands sun protection during midday hours, typically 11am to 4pm. A compact travel umbrella is also worth packing, as 21 rainy days means afternoon showers are a real possibility. Quick-dry synthetic fabrics are preferable to cotton in 82% humidity.
May is a reasonable time to visit Bangkok. Expect 21 rainy days, so pack a light rain layer for flexibility. Average temperatures of 33°C make outdoor exploration comfortable during the dry periods. With 10 daily sunshine hours, there are reliable windows of good weather to plan outdoor activities around, even if the month is not the driest on the calendar.
The average high temperature in Bangkok in May is 33°C (91°F), and the average low is 26°C (79°F). The mean daily temperature is approximately 30°C (85°F). The day-to-night range of 7°C is moderate, meaning a single light jacket covers most situations. These are 30-year climate normals based on the 1991 to 2020 reference period; individual years will vary, particularly in transitional months like spring and autumn.
The best month to visit Bangkok is generally January. January offers the most sunshine at 11 hours per day and only 3 rainy days. Average temperatures reach 31°C, making it comfortable for sightseeing, outdoor dining, and exploring the city. If your travel dates are flexible, planning your trip around January gives you the best chance of dry, bright weather.
May is shoulder or low season in Bangkok, meaning fewer tourists and generally lower prices than peak months. With 10 sunshine hours and 21 rainy days, the weather is less of a draw for mass tourism. This is an advantage for travellers who prefer a quieter, more relaxed experience with shorter queues and easier accommodation availability.
In May, Bangkok suits a range of activities thanks to warm temperatures of 33°C. With frequent rain, indoor activities and covered attractions are a smart choice. Top options include exploring historic neighbourhoods, visiting museums and galleries, local food markets, and day trips to surrounding areas. With 10 hours of sunshine, parks and waterfront walks are particularly enjoyable.
May ranks 5th sunniest of the year in Bangkok, with an average 10 daily sunshine hours. The driest months are December, January, and February. April is the hottest month (35°C avg high); October is the coolest (30°C). From here, temperatures fall 1°C into June. Compared to last month (April: 35°C high, 11 rain days), May is cooler and wetter. May sits in the middle of the annual sunshine ranking for Bangkok, offering a reasonable balance of good weather and manageable crowds.
Year-Round Climate
| Month | High | Low | Rain Days | Sun | Details |
|---|---|---|---|---|---|
| January | 31°C | 21°C | 3 | 11h | View |
| February | 32°C | 23°C | 3 | 11h | View |
| March | 34°C | 25°C | 6 | 11h | View |
| April | 35°C | 27°C | 11 | 11h | View |
| May | 33°C | 26°C | 21 | 10h | View |
| June | 32°C | 26°C | 22 | 10h | View |
| July | 32°C | 26°C | 23 | 9h | View |
| August | 31°C | 25°C | 24 | 8h | View |
| September | 31°C | 25°C | 26 | 9h | View |
| October | 30°C | 24°C | 21 | 9h | View |
| November | 31°C | 23°C | 7 | 10h | View |
| December | 31°C | 21°C | 2 | 10h | View |
January
3 rain days, 11h sun
31°21°
February
3 rain days, 11h sun
32°23°
March
6 rain days, 11h sun
34°25°
April
11 rain days, 11h sun
35°27°
May
21 rain days, 10h sun
33°26°
June
22 rain days, 10h sun
32°26°
July
23 rain days, 9h sun
32°26°
August
24 rain days, 8h sun
31°25°
September
26 rain days, 9h sun
31°25°
October
21 rain days, 9h sun
30°24°
November
7 rain days, 10h sun
31°23°
December
2 rain days, 10h sun
31°21°
Other Months in Bangkok
Plan Your Trip to Bangkok
Nearby Destinations
Cities within 500 km with comparable weather conditions
Data Sources for Bangkok
Climate normals represent 30-year averages (1991-2020). Individual years may vary.