Weather in Bangkok in July

How July compares

July is the 6th warmest month of the year in Bangkok and ranks 19th of 134 destinations we compare for July - see where else is hot in July. Within Thailand it is 1st of 6 (Thailand in July). Against London's average high of 21.8°C in July, Bangkok is 9.9°C warmer by day and 12.1°C warmer at night.

Daytime and night-time in July

The typical July day in Bangkok peaks at 31.7°C, but that is an average: the warmest 10% of days reach 34.0°C or more. About 100% of days top 25°C and almost every pass 30°C. Nights average 25.6°C; one night in ten drops to 24.8°C or lower, so pack a layer for evenings. Between 1991 and 2020 the hottest July day here reached 36.7°C (1993-07-27) and the coldest night 23.8°C (2011-07-04).

Rain in July

Wet (more than 8 rainy days): about 23 days with 1 mm or more, 137 mm in total. Year to year it varies a lot - the wettest July was 2017 with 253 mm, the driest 2002 with 87 mm. Humidity averages 78%, which makes the heat feel heavier than the thermometer suggests.

Sea temperature in July

The sea averages 29.5°C - warm enough to swim (22°c+). Depending on the year it ranges from 29.0°C to 29.9°C. For the warmest sea here, come in May (30.6°C).

Sunshine and daylight

Around 1.4 hours of sunshine a day (estimated from cloud cover), 12.7 hours of daylight: the sun rises about 05:58 and sets about 18:50 local time in mid-July. Average cloud cover is 89%.

Is July a good time to visit Bangkok?

It is a reasonable choice: hot days but expect showers. 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.

Hot days, with little relief at night

The heat is a daily consideration rather than an occasional inconvenience. With 78% humidity, walking around can feel sticky, so loose, breathable clothing and regular cooling breaks make sense. The warmest 10% of days reach 34°C or more, which makes a packed outdoor schedule less appealing. Keep the most tiring parts of your day away from midday where possible, without expecting mornings or evenings to feel cool. Night-time lows average 25.6°C, so air conditioning is a sensible accommodation priority if heat disrupts your sleep. July suits travellers who tolerate warm, humid conditions better than those who want comfortably cool evenings.

Plan for rain, not dependable sunshine

Rain is frequent enough that it should shape your plans, not just your packing. Carry a compact umbrella or lightweight waterproof, and choose footwear you can tolerate getting wet. About 23 rainy days does not mean continuous rain throughout each day, but it does make a completely dry trip a poor expectation. Sunshine averages only 1.4 hours a day despite 12.7 hours of daylight, so long daylight hours should not be confused with clear skies. Keep outdoor plans movable and have indoor alternatives ready. The catch is that these averages cannot tell you when rain will arrive, so do not rely on a particular daily window staying dry.