Weather in Bangkok in June

How June compares

June is the 5th warmest month of the year in Bangkok and ranks 7th of 134 destinations we compare for June - see where else is hot in June. Within Thailand it is 1st of 6 (Thailand in June). Against London's average high of 19.6°C in June, Bangkok is 12.7°C warmer by day and 14.7°C warmer at night.

Daytime and night-time in June

The typical June day in Bangkok peaks at 32.3°C, but that is an average: the warmest 10% of days reach 34.7°C or more. About 100% of days top 25°C and almost every pass 30°C. Nights average 26.0°C; one night in ten drops to 25.1°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest June day here reached 37.9°C (1997-06-20) and the coldest night 23.9°C (1999-06-12).

Rain in June

Wet (more than 8 rainy days): about 22 days with 1 mm or more, 130 mm in total. Year to year it varies a lot - the wettest June was 1994 with 238 mm, the driest 1997 with 51 mm. Humidity averages 77%, which makes the heat feel heavier than the thermometer suggests.

Sea temperature in June

The sea averages 30.1°C - warm enough to swim (22°c+). Depending on the year it ranges from 29.6°C to 30.6°C. For the warmest sea here, come in May (30.6°C).

Sunshine and daylight

Around 1.5 hours of sunshine a day (estimated from cloud cover), 12.8 hours of daylight: the sun rises about 05:51 and sets about 18:46 local time in mid-June. Average cloud cover is 88%.

Is June a good time to visit Bangkok?

June is not the strongest month here: hot days and frequent rain. The best months for Bangkok on our scoring are December, January, November; months averaging 25°C or more: Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec.

Expect heat that lasts into the evening

Pack for sustained heat rather than the occasional hot afternoon. Temperatures reach 30°C on 94% of June days, while humidity averages 77%, making light, loose clothing a sensible choice. The hotter days reach around 35°C or more, so avoid making long stretches outdoors at midday central to your plans. Keep water handy and leave room for air-conditioned breaks. Evenings are better treated as time away from direct sun than as genuinely cool weather: the average overnight low is 26°C. If you struggle to sleep in warmth, prioritise accommodation with effective cooling. June suits heat-tolerant travellers more than anyone hoping for comfortable walking weather throughout the day.

Plan around rain, not reliable sunshine

Rain is frequent enough to shape your holiday, so outdoor plans need an indoor alternative rather than a fixed timetable. About 22 days have measurable rain, though that does not mean it rains continuously on those days. Carry a compact umbrella or lightweight waterproof and choose clothing that dries readily. Sunshine averages only about 1.5 hours within 12.8 hours of daylight, so long days should not be confused with long sunny spells. There is still scope to spend time outside, but June is a poor fit if clear skies are your main reason for travelling. Keep your schedule adjustable rather than relying on a particular part of the day staying dry.