Thailand 7-day forecast: More rain in Bangkok, heat in Chiang Mai, periodic rain in Phuket

Bangkok: Rain increases notably mid- to late week

From Saturday, October 17, to Friday, October 23, Bangkok is forecast to have rain throughout the week, with the chance of rain rising notably midweek. From Saturday, October 17, to Monday, October 19, a low-pressure area is forecast to move from the northwest toward the south, then remain nearby. Occasional rain and some sunny periods are expected, with a 60–70% chance of rain. Highs are forecast at 33–34°C and lows at 26–27°C. On Tuesday, October 20, a high-pressure ridge is forecast to extend southwest, raising the chance of rain to 70%. The high is forecast to reach 35°C. From Wednesday, October 21, to Thursday, October 22, a low-pressure trough is expected to remain nearby, bringing more noticeable rain. The chance of rain could reach 90% before dropping to 70% on Friday, October 23, when the high is forecast to reach 33°C.

Chiang Mai: Low chance of rain all week, markedly hotter midweek

From Saturday, October 17, to Friday, October 23, Chiang Mai has only a 10% chance of rain each day. On Saturday, October 17, a high-pressure ridge is expected to remain nearly stationary, with sunny skies. The high is forecast at 34°C and the low at 25°C. No notable changes in air pressure are expected from Sunday, October 18, to Wednesday, October 21. Sunday, October 18, is also forecast to be sunny, with a high of 34°C and a low of 24°C, before conditions become markedly hotter from Monday, October 19, to Wednesday, October 21. Highs are forecast at 35°C and lows at 24–25°C. Relative humidity is forecast to fall to 53–55% before sunny skies return from Thursday, October 22, to Friday, October 23, with highs of 34°C and lows of 24°C.

Phuket: Periodic rain, highest chance of rain midweek

From Saturday, October 17, to Friday, October 23, Phuket is forecast to have periodic rain, with the highest chance of rain midweek. From Saturday, October 17, to Sunday, October 18, high pressure is expected to remain nearby, bringing occasional rain and some sunny periods before conditions shift to intermittent rain. The chance of rain is forecast to rise from 60% to 80%, with highs of 33–34°C. From Monday, October 19, to Tuesday, October 20, a low-pressure area and then high pressure are expected to remain nearby. The chance of rain is forecast to hold at 80%, while relative humidity reaches the week's high of 78%. From Wednesday, October 21, to Thursday, October 22, high pressure is forecast to move westward. Rain is expected to ease, with alternating sunny periods, and the chance of rain to fall to 60%. The high is forecast to reach 33°C before the chance of rain rises to 70% on Friday, October 23.