Today's forecast: Rain in Phuket at 3 p.m.; extreme heat in Bangkok and Chiang Mai

Phuket sunny before rain, with a 90% chance from 3 p.m.

Phuket is forecast to be sunny before rain today, with a low of 25°C and a high of 34°C. The daily chance of rain is 60%, with 10 mm of rainfall. At 6 a.m., skies will be cloudy, with a temperature of 25°C and a 10% chance of rain.

At 9 a.m. and noon, Phuket is forecast to be sunny, with 0.0 mm of rainfall and a 10% chance of rain. At 3 p.m., 1.0 mm of rain is forecast, and the chance of rain rises to 90%, with a temperature of 33°C. Those who need to go out during this period may consider taking an umbrella or raincoat.

At 6 p.m., Phuket will be cloudy, with a temperature of 29°C and a 90% chance of rain. At 9 p.m., skies will remain cloudy, with a temperature of 28°C and a 90% chance of rain.

Extreme heat in Bangkok and Chiang Mai, with highs of 35°C

Bangkok is forecast to be very hot today, with a low of 27°C and a high of 35°C. Relative humidity is 57%, the chance of rain is 10%, and rainfall is 0 mm. At 6 a.m., the temperature will be 26°C, with a few clouds and 90% humidity. It will be sunny at 9 a.m., with a temperature of 30°C; the temperature will reach 34°C at noon and 35°C under sunny skies at 3 p.m.

Chiang Mai is also forecast to be very hot, with a low of 24°C and a high of 35°C. Relative humidity is 52%, and the chance of rain is 10%. At 9 a.m., skies will be clear, with a temperature of 28°C; the temperature will reach 33°C at noon and 34°C under clear skies at 3 p.m., when the chance of rain is 0%.

The WBGT heat-stress index is at the very high caution level in Bangkok, Chiang Mai, and Phuket.

Bangkok's air quality improves to good by noon

Bangkok's daily air quality is rated slightly polluted. It remains at that level at 6 a.m. and 9 a.m., before improving to good at noon. Chiang Mai and Phuket are rated good for the day. Phuket's air quality is rated excellent at 6 a.m. and again at 6 p.m.

The outdoor activity index is rated poor in Bangkok, Chiang Mai, and Phuket, while the driving index is rated excellent in all three cities.

Bangkok's mosquito index indicates that there are few mosquitoes or that they are not very active. Mosquitoes may be present in Chiang Mai and Phuket, so prepare as needed.